Issue 4 / 2012
www.weidmuller.co.uk
CONNECT UK.
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CONTENTS & INTRO
TOOLS OVERVIEW 6 - 11
E-SHOP 13
Well, autumn is upon us now and soon we will have a spectacular show of colour and richness to enjoy before we are plunged in to winter! With the colder, wetter weather, it is even more important that you have tools you can work with that deliver ease of use, comfort to reduce fatigue during operation and slip-free control. Whatever your needs for cutting, stripping or crimping, you will find that there has been just that little bit extra added in the design of our Weidmüller tools that makes all the difference. Vince (left), our man in the van, returns once more to take you through our vast range of precision products, all of which have been produced and tested to ensure that you are protected from potential shock or injury when working on live electrical installations or equipment.
We also update you on our most recent electronics announcements with SIL3 compliant safety relays, solid state relays and our TermOpto coupling terminals. In the area of OMNIMATE® Power, we highlight the benefits of the new WGK panel feed-through terminals. We also reveal an exciting new resource from PowerGuru.org – a joint project between Weidmüller and other major power electronics manufacturers – aimed at helping engineers working in the power electronics field with information on new products and technical information. We were also asked for more information regarding our E-shop functionality and so Connect UK interviewed Ian Sweatman our Customer Services Manager, to provide you with further details. And we finish with an article on the differences between earthing and shielding and terminal technologies on offer from Weidmüller! Happy reading! Lesley Young Editor
3 ELECTRONICS
9
Automatic Machines 10 Tool Sets
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SIL3
4 TERMOPTO
11 Screwdrivers
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Solid-State Relays
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12 OMNIMATE
MICROOPTO
6 - 11 TOOLS OVERVIEW
13 E-SHOP
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Testing
7 Pliers
14 - 15 TERMINAL EARTHING & TECHNOLOGY
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Screwdrivers
8 Cutting
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Differences Between Earthing & Shielding
8
Stripping
9 Crimping
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Terminal Technology
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ELECTRONICS SIL3 compliant safety relays Reliable shutdown during an emergency Safety shutdown is critical in the process industry because it serves functional safety, for instance in backup systems with high DC voltages. EN 61508 specifies that all devices used in safety circuits must fulfil particularly strict conditions. SIL (Safety Integrity Level) makes it possible to classify corresponding devices according to the reliability of their safety function and the safety oriented design principles that must be maintained in order to minimise the risk of malfunctions. The standard EN/IEC 61508 states that functional safety is given when safety systems and organisational measures minimise risk to an acceptable level. In this case, SIL 3 relays can be deployed to ensure emergency shutdown. As a rule, operation in low demand mode is sufficient as emergency events are not usually seen as regular occurrences. However, in some industries, the high demand operating mode can also play a central role in creating functional safety. For instance, overfill protection solutions in tank systems need to ensure control on a permanent basis. The Weidmüller solution is the new SAFESERIES safety relay, which is certified by TÜV Nord in accordance with EN 61508 for the safety integrity level SIL3. There are currently three variants to choose from: the standard version which contains the SIL3 safety circuit, and the second version which is equipped with a wide-range voltage input on the monitoring circuit from 24 V AC/DC to 230 V AC/DC. This allows it to be used individually for applications such as back-up systems or in overflow tank safety systems, and the third version has G3 coating which is a requirement for applications, where there is a high concentration of hydrogen-sulphide and it has been tested in accordance with EN 60068-2-60. State analysis made easy Status indicators for the safety and monitoring circuits are displayed directly on the device – so the troubleshooting process is easier. Easy to replace the fuse The fuse is accessible externally so that it can be quickly replaced on-site. Use for back-up systems The wide-range voltage input in the monitoring circuit enables back-up systems with high DC voltages to be controlled. Improved integration in DCS systems Special circuitry in the input circuit makes the SIL circuit immune to test pulses that are commonly used by DCS systems. Proven technology – global accreditation With certification by the internationally recognised TÜV NORD Group, the range is suitable for installation in applications worldwide.
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ELECTRONICS
TERMOPTO
Solid-State Relays
Wear-free electrical isolation in a terminal block format
Contactless switching and amplification of digital signals
Wear-free solid-state relay technology in space-saving design. The TERMOPTO coupling terminals are characterised by a particularly compact design, pluggable cross-connections and optimum priceperformance ratio. TERMOPTO offers a compact, electronic alternative to the electromechanical relay for electrical isolation and signal conditioning. Instead of an electromechanical solution that is susceptible to wear, a maintenance-free and compact terminal block with integrated electrical isolation is used. This saves space, reduces the amount of servicing and increases system availability. In addition, the overall accessory needs are reduced, because cross-connectors and markers from our terminal portfolio can be used.
Solid-state relays (SSRs) are modules that are not only equipped with an optocoupler for electrical isolation purposes but also with a switch amplifier. To switch applications running higher currents it is necessary to accommodate the different performance ratings of the phototransistor and the load circuit, which calls for switch amplification.
Compact Compact design reduces space requirements in the switching cabinet by >80% compared to conventional relay solutions. Long lifetime Wear-free semiconductor switches and extensive protective circuits ensure long service life and reliable switching cycles Status indicator LED status indicator provides information on the switching state. Closed design Closed design for space-saving, side-by-side arrangement. No end plate necessary; the electronics are mechanically protected. Time-saving PUSH IN screwless connection system and the pluggable cross-connection reduce wiring time by > 50%. Comprehensive portfolio TERMOPTO is available in the following versions: 10 Control Voltages: 5...220 VDC ; 24...230 VAC 4 Switching Voltages: 5...48 VDC 0.1A ; 5...48 VDC 0.5A ; 24....230 VAC 0.1A ; 3...33 VDC 4A
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When compared with electromagnetic relays, solid-state relays have a number of advantages to offer: • They operate extremely reliably over a long service life, they are small, have low drive power requirements and have extremely fast response times. • Solid-state relays make no switching noise when operating and switch loads without contact bounce. They are insensitive to shock and vibration. • They do not subject adjacent component groups to electromagnet emissions or switching sparks during switching operations.
ELECTRONICS
MICROOPTO Switching amplifier for inductive loads up to 10 A The MICROOPTO family offers high-quality optos and solid-state relays for application-oriented problem solutions. All products are designed in a space-saving 6mm terminal size. The new MICROPTO SOLENOID solid-state relay can be connected in the output circuits of control systems and feedback control modules for selective activation of inductive loads up to 24 V DC / 10 A, such as solenoid valves, contactors, etc. The error controlled output monitors short-circuits and, if necessary, switched off; a potential-free signalling contact provides feedback to the control system – the system can be shut down in a controlled manner for error rectification. The powerful output of the MICROOPTO SOLENOID switches 10 A at 55°C. The product can be used worldwide due to the international approvals: CE, cULus and GL. Alarm function Clear condition display through status and error LEDs in the output Space-saving Space-saving 6mm width. Not sensitive Protected by suppressor circuit on input and output circuits. Tough and sturdy With a short-circuit-proof output. Auxiliary contact An auxiliary contact issues alerts in event of short circuits.
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TOOLS OVERVIEW Safe Isolation, German Precision Working with live electrical installations or equipment calls for special safety precautions to avoid shock or injury, including the use of tools that have been produced and tested for this purpose. Precision, German tools by Weidmüller have been in use all over the world for over 30 years and our name is one our customers know they can trust. As part of the safe isolation procedure for proving a circuit is dead as recommended by the health and safety executive (HSE), two pole testers are one of the only recommended voltage detection instruments which should be used. In rare cases where it is not possible to work on dead electrical installations, protective equipment such as tools that have suitable insulation should only be used in order to prevent injury. Our new range of two pole testers are ideal for safely checking the absence of voltages up to 600 V and combined with our 1,000 V VDE insulated SlimLine screwdrivers and pliers, we are well equipped to help you in this area. Whatever your tool requirements whether working in control panels or other electrical installations carrying out testing, stripping, cutting, crimping and termination functions, these are all our expertise. From a market leader in connection products with worldwide distribution, use the best in German precision tools!
Testing Two pole voltage testers, digital multimeters and clamp on meters Test instruments are indispensable when installing, servicing and repairing electrical systems and equipment. Weidmüller has a full range of test devices, including voltage testers, clamp-on meters and multimeters. Two-pole voltage tester It should never be assumed that equipment or electrical installations are dead because a particular disconnection device has been placed in the off position. Two pole testers are one of the only safe test instruments for proving circuits are dead as recommended by the health and safety executive in HSE guidance note GS38. All testers are TUV/GS certified and meet the revised standards for these type of testers i.e DIN VDE 0682401:20011 and DIN EN-61243-3:2010. • • • •
HSE GS38 Compliant IP 65 protection Temperature resistant -15°C to 45°C Illumination LED
Multimeters • Voltage and resistance measurements • Capacitance and frequency measurements • Temperature measurement (including temp. probe) • MAX/MIN memory • HOLD function • PEAK function
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CAT IV – 600 V TUV/GS certified Large display
Clamp on meters • Current measurement • Frequency measurement • Voltage measurement • PEAK function
TOOLS OVERVIEW Pliers When working with live voltages, you must follow special guidelines and use special tools - tools which have been specially produced and tested for this purpose. We offer a complete line of pliers which comply with national and international testing standards. All pliers are produced and tested according to DIN EN 60900. They are ergonomically designed to fit to the hand, resulting in less fatigue during operation. Comprehensive range 1,000 V VDE insulated pliers, made from high quality machine tool steel with ergonomic soft finish and non-slip safety grips. Includes; combination, cutters, long nose, flat nose & round pliers. • 1,000 V VDE tested • Safety handle with ergonomic soft finish non-slip VDE grip • Nickel-chromium electro coating protects against corrosion
• Drop-forged from high quality tool steel • Shockproof, heat-and cold-resistant insulation.
ESD Pliers Electrostatic discharges (ESD) can cause significant and costly damage to sensitive electronic components and should not be underestimated. ESD charges smaller than 200 V cannot be felt by humans, however ESD charges smaller than 100 volts can cause damage to electronic components. Weidmüller ESD pliers can be used with precision and safety when working with sensitive electronics, with electrostatic charging prevented by the special handle material. • ESD protected plastic hand grip • Precision engineered
Screwdrivers Our new premium SlimLine screwdrivers are ideal for use in applications up to 1,000 V and offer fully-hardened high-alloy steel blades in a black gunmetal finish. The ergonomically designed handle enables fatigue-free, comfortable working and the SoftFinish® zone ensures optimum “slip-free” control for hightorque tightening and loosening of screws. In addition, the new SlimLine design features a 33% slimmer blade, ideal for reaching screws that are sunk well below the surface of electrical components and to operate the spring of Weidmüller’s Z-series tension clamp terminal blocks. VDE - Insulated Screw drivers VDE insulated screwdrivers, for working on live parts up to 1,000 VAC and 1,500 VDC. DIN EN 60900, IEC 900, safety tested.
Torque screwdrivers Available in two options 1,000 V VDE insulated or uninsulated for general use. Versatile tool with interchangeable blades including bit holder. Ensures controlled tightening of screws.
• 1,000 V VDE tested • Ergonomic soft finish grip for optimum handling • Hardened gun metal chrome-vandium steel shafts.
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Uninsulated Screwdrivers • Ergonomic soft finish grip for optimum handling • Hardened metal chrome-vandium steel shafts, matt chrome finish. Rechargeable torque screwdriver Guaranteed fatigue free working where high repetition work is involved, with selectable torque setting. • • • • • • • • •
One-hand operation under all working conditions Switchable forward and reverse 2 speeds: 200 and 400 rpm Precise torque pre-selection of approx. 0.3...3 Nm in 6 steps Consistent performance during battery discharge Simple changeover from straight to pistol form Bit holder: 1/4" ball-bearing fixing mechanism Safety lock prevents inadvertent operation Simple switchover from battery to manual operation up to 15 Nm
Compact and lightweight Torque setting with special tool (included) to ensure unintentional adjustment Ergonomic grip sizes matched to the torque Interchangeable blades made of high wear resistant stainless steel Interchangeable bits Audible click on reaching torque setting
Screwdrivers (Swifty) Cable cutting tool for mounting on non-insulated screwdrivers, with a blade diameter of 3.5mm for combined cutting & screwdriving. • One-handed operation • For solid copper cables up to 1.5mm2 and 2.5mm2 stranded • High quality chrome-vanadium steel blade
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TOOLS OVERVIEW Cutting Cutting and punching tools: the top choice for all applications. We are specialists in the cutting of copper and aluminium cables. The range of products extends from cutters for small cross-section cables, right up to ratchet cable cutters for larger copper cables up to 630mm2 csa. The mechanical operation and the specially designed cutter shape minimise the effort required. With its wide range of cutting products, we meet all the criteria for professional cable processing. Cable cutter (KT Series) • Suitable for stranded copper cable 16mm2 to 35mm2 csa • Not suitable for steel wires, steel-armoured cables, aluminium alloys and hard-drawn copper conductors! • Cutting without deformation of the conductor Front cable cutter (KTF Series) • Can be used in confined spaces wherever cables need to be divided. • Easy handling • Minimal hand force required • Release option in every cutting position • Not suitable for steel wires, steel-armoured cables, aluminium alloys and hard-drawn copper conductors!
KT-Series with ratchet • Easy handling • Minimal hand force required • Release option in every cutting position • Not suitable for steel wires, steel-armoured cables, aluminium alloys and hard-drawn copper conductors! More cutting tools • Special tools for use with Weidmüller terminals; rail cutting, hydraulic hole punching, channel cutter
Stripping Professional stripping tools for insulation and sheathing Consistent stripping of insulation from conductors is essential to provide a safe electrical connection, with some of the most popular problems associated with this being; remaining conductor insulation damaged, remains of insulation are left on stripped area, single strands have been damaged or cut off reducing the overall cable cross sectional area. All of these problems can lead to an unsafe electrical connection with possible overheating being caused. For over 30 years, the stripax® has set global standards as a reliable cutting-edge stripping tool. The new 4th generation stripax® displays the same high quality, but now also features improved functionality and a comfortable ergonomic design for improved handling in industrial processes. Stripping (stripax®) • For flexible and solid conductors with PVC insulation 0.08mm2 to 16mm2 • Stripping & cutting function possible with the one tool • Automatic opening of clamping jaws after stripping • Stripping length adjustable via end stop • Adjustable for different insulation thicknesses • Long-lasting • No damage of single conductors • Optimised ergonomic design
Stripping (stripax® Plus 2.5) • Only one tool needed for cutting, stripping & crimping, saving significant time in cable preparation • Automatic feeding of wire end ferrules • Ratchet guarantees precise crimping • Release option in the event of incorrect operation
Sheathing strippers (AM Series) High-quality stripping for industrial applications .
Sheathing strippers for coaxial cable (CST Series) • For coaxial cable and round (shielded) data cables from 2.5…8mm diameter • Antenna cable, Ethernet cable and Profibus cable • 1-,2- and 3-level stripping in one step • Fast changeover to other cable types
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Pivoting blade for circular, longitudinal and spiral cuts For 6 to 36mm diameter cables Retailing clip with integrated blade to break open an incision in the insulation. Integrated spare blade
TOOLS OVERVIEW Crimping Our wide product range includes crimping tools for bootlace ferrules and many other contacts After stripping the insulation, a suitable contact or bootlace ferrule can be crimped onto the end of the cable forming a secure connection between conductor and contact. Crimping denotes the creation of a permanent connection between conductor and connecting element, resulting in a secure and reliable connection both in mechanical and electrical terms. Weidmüller offers a wide range of mechanical crimping tools having integral ratchets with release mechanisms which guarantee optimum crimping. Crimped connections made with Weidmüller tools comply with international standards and regulations. Crimping tools for bootlace ferrules (stripax® plus 2.5 and PZ Range) • Ratchet for precise crimping • Release option in the event of incorrect operation • Only one die/crimping station for the whole cross-section range • Precise stripping operation
Crimping tools for cable lugs • Mechanical function ensures safe and manageable operations under different environmental conditions • Precision engineering means high pressing force with little physical effort • Comprehensive range of crimp inserts conforming with standards
Crimping tools for insulated cable connectors (CTI range) • Ratchet for precise crimping • Release option in the event of incorrect operation • For PVC, PC, and polyamide insulated connectors
Special tools for crimping and stripping of special cables • For fibre-optic cables • For coaxial connectors such as BNC, TNC and N plugs • For SUB-D contacts • For contacts from the Weidmüller DFF Series
Pressing tools • Ratchet for precise crimping • Release option in the event of incorrect operation • Functions: pressing of plug connectors, pressing of enclosure shielding, crimping of cable shielding, cutting, stripping, crimping
Automatic Machines A comprehensive line of processing machines that provides professional and efficient solutions for working with cables The rationalisation of crimping processes calls for more and more automation of the individual steps. "Reduction of installation times" is what the markets of the future will be demanding of their strategic partners. Automatic machines that permit rational processing of conductor materials represent an approach geared to their future needs. Versatility and functionality are decisive factors for customers. With our comprehensive line of automated machinery, we provide professional and efficient solutions for cable preparation and processing. Cable cutting machines • Fitted with servo DC drive for repeat accuracy • Suitable for cutting flexible copper cables from 0.14mm2 to 10mm2 • Adjustable cable clamping force • Software (supplied) enables simple management via a PC • Removable hand-held terminal for entering individual cutting jobs
Stripping machines • Quick and easy setting for the respective cross-section • Suitable for stripping flexible copper cables from 0.14mm2 to 16mm2 • Change of tools not necessary • Partial stripping, insulation remains on end of conductor Stripping and crimping machines • Oscillating conveyor for grabbing free ferrules • Change of tools not necessary, therefore efficient and time-saving processing • Full electronic control
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TOOLS OVERVIEW Tool Sets Assorted Tool Sets Workshops and factories prefer well-organised sets of tools. This results in minimal searching and preparation, and that saves money. We implement such knowledge when combining products, characterised by good benefits for users and good functionality. Our Crimp Sets for cutting, stripping and crimping wire end ferrules provide users with practical toolkits.
Hexagon Socket (IS Series) Hexagon screwdriver with cross-grip made from highquality plastics.
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Cabinet keys (Crosskey) Crimped conductors are fixed in their respective wiring spaces by screws or a direct plug-in feature. Weidmüller can supply a wide range of tools for screwing.
Reduced searching and preparation times Saves money Cutting, stripping and crimping-sets stand out due to their high user benefit and functional features
Cable gland tools • Screwing tool for fixing and loosening cable glands and accessories in the sizes 11-36 AF. • Can reach over several rows of glands • No deforming of the cable glands • Spanner size 11 to 36mm • Infinite adjustment of spanner size • Ratchet function: not necessary to remove tool between turns • Authentic one-hand tool Socket wrench sets • Allen key made from fully hardened, high-alloy chromium-vanadium- steel, acc. to DIN ISO 2936 L (DIN 911), high-quality refined surface
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Wire end ferrules The use of wire end ferrules ensures that users get electrical connections of long-lasting, consistent quality. In addition, they bring advantages during installation. Our wide range of products comprises wire end ferrules with and without plastic collar, plus all the colours customers require. • • •
Comprehensive range of wire end ferrules and insulated cable lugs Usefulness during installation High quality of industrial connection
Connector The use of insulated connectors guarantees users a permanent and consistent quality for their electrical connections. In addition, they bring advantages during installation. • • •
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Surface nickel-plated Made from hardened chromium-vanadium steel According to DIN 6911 Designed for screws according to DIN 6912
Comprehensive range of wire end ferrules and insulated cable lugs Usefulness during installation High quality of industrial connection
TOOLS OVERVIEW Expanding our assortment of screwdrivers A universal answer to high and low torque requirements
Using the angled spring opener makes it easier to reach tension clamp terminals mounted in confined spaces – for instance in distribution cabinets. To achieve this, the blade is curved at an angle of 40°, a design feature that also simplifies handling. The 3.0mm thick blade is made of metal to ensure low-wear, even after frequent use and guarantees value retention over time; put succinctly, the tool will last longer. The angled spring opener can be used, for example, in conjunction with our MICROSERIES and TERMSERIES, equipped with tension clamp connections, as well as tension clamp terminal blocks – to open the tension clamp.
and versatile answer to high and low torque requirements. Screwdrivers and interchangeable blades for DMSI are especially used in the field of electronics (insulated interchangeable blades are available for DMSI torque screwdrivers). Owing to their universal versatility plus/minus screws have become the standard in the field of electronics in the last few years; for instance, they are used in relay bases requiring low torques as well as in surge protection modules requiring higher torques. The advantages of using plus/minus screwdrivers become strikingly obvious when used in conjunction with our Rider Series and the Power Solid State Relay as well as with other products. We now fit plus/minus screws to virtually all of our new products in the field of electronics. Two versions of the screwdriver are available: SL/PH1 with a blade length of 80mm and SL/PH2 with a 100mm blade length - both blades are made of fully hardened, high alloy chromium/ vanadium/ molybdenum steel with a gunmetal finish.
The new hexalobular socket (Torx®) screwdriver with T-handles and bits offers compelling levels of comfort, because the user is able to engage the deep-seated screw much more easily with the screwdriver. This reduces the risk of damaging the screw head profile. Features such as being practically wear-free, and easy to use, serve to ensure this tool retains its value over time, which means it can be used repeatedly without any difficulty. T-handles and bits for screws both feature a Torx® profile. The screwdriver sizes T15, T20 and T40 are used for W-Series screwtype terminals – "WDU 50N IR" equipped with hexalobular socket screws. With the introduction of the various T-handles and bits for Torx® screws we are meeting the needs of a wide range of customer requirements. Using T-handles, it is possible to transmit more torque with less effort, in comparison with conventional handles. In addition, bits are favoured in combination with torque screwdrivers as soon as customers are obliged to provide verification of torque transmission values.
Robertson screwdrivers have a square-tipped profile and enable users to gain a good grip on the screw and, as a consequence, facilitate the transmission of high torques. Robertson (square tip) screwdrivers are synonymous with high levels of safety, simply because the screwdriver does not easily slip out of the square recess in the head of the screw. They satisfy regional requirements in NAFTA countries. The Canadian Peter L. Robertson invented the square recess profile, which was named after him, more than one hundred years ago. Today, screws with the Robertson (square) profile are commonly used in NAFTA countries – and are particularly preferred in industrial applications. Two versions of the routinely tested screwdrivers are available. The SDIR 1 has a 2.3mm head; the 100mm blade is made of fully hardened, high-alloy chromiumvanadium-molybdenum steel with a gunmetal finish. The SDIR 2 with a 2.8mm head and a blade length of 150mm is made from the same highquality blade material.
Because plus/minus screws can be tightened using slotted and crosshead screwdrivers, our plus/minus screwdrivers and interchangeable plus/minus blades offer users equally superior levels of comfort and convenience. This all goes to ensure they are the universal
Weidmüller VDE insulated screwdrivers, meaning the plus/minus screwdriver with interchangeable blades and the Robertson screwdriver are certified for work on live components up to 1000 VAC and 1500 VDC in accordance with DIN EN 60900, IEC 900.
We have expanded our assortment of screwdrivers with an angled spring opener, hexalobular socket (Torx®) screwdriver with T-handles and bits, plus/minus screwdriver and interchangeable blades as well as a Robertson (square tipped) screwdriver.
Superior Functionality with our new SlimLine VDE screwdrivers Innovative quality with your safety in mind We have placed particular emphasis on superior functionality in combination with an ergonomic design for our new range of SlimLine screwdrivers. With this in mind the blade of the SlimLine screwdrivers is as much as 33 percent thinner than standard VDE screwdrivers. The slimline design makes it possible to easily access sunken screws and operate the spring of tension clamp terminal blocks, a task for which standard VDE screwdrivers are not suitable. Our SlimLine screwdrivers are particularly suitable for manoeuvring the spring of our Z-series of terminal blocks. The ergonomical design of the handle enables fatigue-free, comfortable working, in addition to guaranteeing electrical safety. SlimLine tools have particularly high levels of safety: the protective insulation is sprayed directly onto the blade to ensure electrical safety – including in critical applications. The VDE insulated SlimLine screwdriver is designed for working on live parts up to 1000 VAC and 1500 VDC in accordance with DIN EN 60900, IEC 900. The high-alloy chromium-vanadium-molybdenum steel blades are fully hardened and feature a black gunmetal finish. Each tool is individually tested and carries the GS mark (tested safety). The following SlimLine versions are available for delivery: a.) SDI SL S: VDE insulated slot-head screwdriver (DIN 7437, ISO 2380/2, blade to DIN 5264, ISO 2380/1), b.) SDIK SL PH: VDE insulated cross-head Phillips type screwdriver (DIN 7438, ISO 8764/2-PH, blade to ISO 8764-PH), c.) SDIK SL PZ: VDE insulated cross-head Pozidrive type screwdriver (DIN 7438, ISO 8764/2-PZ, blade to ISO 8764-PZ) and d.) SDIS SL 2.5-5.5/PH/1/2: 6-piece set (VDE insulated slothead and PH cross-head screwdriver set). The screwdrivers have a SoftFinish® zone to ensure optimum haptic control as well as slip-free, high-torque tightening and loosening of screws. Screwdrivers with a 'SoftFinish®' gripping zone have an ergonomically designed handle, which is sympathetic to the skin and consists of three components: the first is a particularly strong – not visible – plastic component that reliably and securely joins the blade and handle. The second is a visible, yellow-coloured hard component made of impact-resistant, dimensionally stable polypropylene. The third component – a red-coloured thermoplastic elastomer (TPE) – is designed to be soft to the touch for high levels of gripping comfort and ensure an optimum transfer of force. The design of the handle resembles a heavily rounded octagonal shape. Two parallel surfaces on the collar of the screwdriver offer designed-in anti-roll protection.
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OMNIMATE
OMNIMATE® Power Panel feed-through WGK series terminals Weidmüller has a universal solution for feeding power through panels in the form of the new WGK series. Excellent for applications such as EMC filters, power supplies, frequency converters for drive systems and more. A flexible range of features to choose from: • Wide performance spectrum for currents from 32 to 232A • Termination styles: solder connection, cable-lug-stud connection, and maintenance-free clamping-yoke screw connection • Horizontal or vertical wire outlets • The clip-together enclosure halves result in a detachable and easily fitted connection for linking system components. • The use of the Weidmüller clamping yoke screw connection system guarantees a zero- maintenance, vibration-proof connection. • The finger-safe insulated housings (flammability rating UL 94 V-0) can be labelled using standard Weidmüller markers. • The WGK device terminals are available for wire cross-sections 4, 10, 16, 25, 50 and 95mm². • All variants are optionally available with an assembly pin for convenient side-by-side group mounting Horizontal wire connection (WGK) Product characteristics acc. to IEC: • Rated voltage: 250-690 V • Nominal current: 32-232 A • Cross-section range: 0.22-95mm²
Vertical wire connection (WGKV) Product characteristics acc. to IEC: • Rated voltage: 250-690 V • Nominal current: 32-101A • Cross-section range: 0.22-35mm²
Solder connection (VWGK) Product characteristics acc. to IEC: • Rated voltage: 250-500 V • Nominal current: 32-41A • Cross-section range: 0.22-10mm²
Cable lug connection (WGK VP) Product characteristics acc. to IEC: • Rated voltage: 500-690 V • Nominal current 76-232A • Cross-section range: 0.5 -95mm²
Custom WGK Customised mounting; Bonded block variants of feed-through device terminals and accessories on request
Custom WGK Alternative colour and/or screw type variants available on request
OMNIMATE® Power Connectors and PowerGuru.org New resource for engineers Weidmüller uses PowerGuru.org with new products and extensive planning and design expertise for its OMNIMATE® power connector components. The new online platform is a joint project between Weidmüller and other major power electronics manufacturers. The communications platform focuses on the needs of engineers working in the power electronics field. On the website, engineers can find both the fundamental principles of power electronics plus detailed technical information. "PowerGuru is unique. Whereas other websites provide information about a wide range of electronics sectors PowerGuru specialises exclusively in this field", explains Donald Dahl, PowerGuru spokesperson. "The platform’s target audience consists of electronics companies, engineers and students of power electronics". Another objective is to equip students with power electronics knowledge and to give them a deeper insight into the subject matter. "We aim to become knowledge leaders in the field of power electronics and to be the most frequented platform in the power electronics sector", stresses Dahl. PowerGuru is currently based on texts about partner products such as IGBTs, thyristors, diodes, sensors, capacitors, varistors, terminals and fuses, texts on design, and texts on the fundamentals of power electronics. Further articles on the applications of bridge rectifiers, induction, industrial drivers, lifts, UPS automotive or on the use of power electronics components in solar plants and wind parks will be added at a later date. All articles published on the site will also be archived. Sections of the powerguru.org website include: • General power electronics knowledge base • Q&A section • TechChat with engineers for real-time solving of technical challenges • Worldwide contact details of power electronics companies
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• Company specific technical publications • Company press releases • Worldwide power electronics Job offers
E-SHOP
Weidmüller E-Shop Functionality In the last issue of Connect UK, we highlighted the services offered by our E-shop. In this issue, we caught up with Ian Sweatman, Head of Customer Services here in the UK, and asked him if he would talk to us more about the functionality and ease of use of the online system. Connect UK – Hello Ian. We have had quite a lot of customers using the E-shop for the first time since the article we wrote in the last issue of Connect UK. Would you remind us of the benefits of using this increasingly popular online facility? Ian Sweatman – Yes of course. It is simply that the service is available, on-demand, to our customers 24 hours a day, 7 days a week, and 365 days of the year. It provides two key services that are comprehensive and easy to use. Those two services are Order Management and Information. Connect UK – Can you tell us a little more about the Order Management service? Ian Sweatman – Well let’s see. First, as a customer, you can go online to the E-shop and fill a “shopping basket" by inputting the items you require and the quantities you need. You can even do an upload of complete "shopping lists" using a CSV file format. A direct link to the Weidmüller Online-Catalogue from the shop means that you can also select items from there and put them directly into your shopping basket. You can then facilitate an order simulation should you wish to do so, which results in an offer with individual price and availability information. Once you are happy, you can directly place the order and receive an order confirmation. After this transaction, the order is then processed. It really is that simple. Connect UK – What options are there for the search and selection of products? Ian Sweatman – First of all, products can be searched directly from within the shopping basket. In this case, after a shopping basket has been created, an empty order list is displayed. If you wish, you can then search the product catalogue where products can be searched by product number and descriptions. Secondly, you can select your products using a direct link to the Weidmüller catalogue. In this case, after a shopping basket has been created and an empty order list is displayed, you can then search the product catalogue where products can be searched by product number and descriptions. The asterisk * used as a wildcard is supported. As a general rule, the system will only search for products that are related to your customer number and the sales organisation and the distribution channel you are assigned to. The shop will display the first 20 matches to your request. The desired products can then be transferred into the shopping basket by checking their checkboxes and clicking the transfer button. Connect UK – You mentioned preparing lists offline? Ian Sweatman - Yes. Another way for adding products to the shopping basket is to prepare shopping lists offline and then upload these lists into the shopping basket. This is useful if you have long lists of products you wish to purchase for which you already know the product numbers, for instance, if you order these products in a recurring fashion. The shopping lists do have to be in form of CSV files with a defined column format. In the shopping basket, these shopping lists can be uploaded by first selecting the desired CSV file and then uploading it. The list is then transferred to the shop system, which checks if the items on the list are valid, and then adds the items to the shopping basket. Any errors with items on the list will be displayed.
Connect UK – Most people today are used to shopping baskets. Does the shopping basket operate in a similar manner to those already in existence? Ian Sweatman – Yes, it is very similar to those already around. Basically, the shopping basket is a function within the web shop where you can search for products and then add the selected products to a virtual shopping basket that presents the results of the ordering process. After logging into the system you can create a new, empty shopping basket. You are then asked to fill out your reference no and other fields, such the delivery address, the desired delivery date and the partial delivery checkbox, although not all of these are mandatory. You then select a shipping address from the list of known shipping addresses for your organisation along with a shipping date. There is an option called "Partial delivery allowed" which tells the system whether the order can be split into several deliveries if not all items are available at one time. After you have filled out the fields on the header level and added items to the shopping basket, you can proceed to create an order, a quotation, or an order template. Connect UK – What happens when an order is being created? Ian Sweatman – OK – let me explain. After successfully creating and filling a shopping basket, you can create an order. At first, a simulation of the order is shown whilst verification processes, rounding’s and so on are being processed in the background. At this point, you can opt to continue or, if the order is complete and valid, you can place the order. This opens a confirmation dialogue in which both you and Weidmüller have to agree to the Terms and Services of the Weidmüller Web Shop and confirm that you wish to place the order. This creates a physical order document in the Weidmüller system. You will then also be given the choice to print out a copy of the quotation document for yourself. I would also like to mention that in order to simplify the purchasing process, the use of templates is also supported and the overall process for this is similar to creating an order. The advantage of order templates is that they are there, ready to use and yet they can be quickly changed and adjusted as necessary. Connect UK – What happens once an order is placed? Ian Sweatman - When you have placed an order in the Weidmüller web shop, you will receive an order confirmation in the same way as if you had ordered by phone or mail. Connect UK – Other than searching for products, what other types of information can you look up? Ian Sweatman – All sorts of information to do with your order! You can look at your Order History for example ie. after you have logged into the web shop, you can quickly get an overview of your previous orders in the system and search on them. You can see their details and you also have the option of filtering the search results for such things as transaction type (order, quotation, order template), status (open, completed), reference number, time period and whether partial delivery is allowed Connect UK – Presumably you can track your order too? Ian Sweatman – Of course. By using the search functions for orders, deliveries and invoices, you are able to check such things as the status of a delivery – with access to a direct link to the tracking system of the parcel services used. In fact The order tracking feature means you can track the delivery of your order. With the Weidmüller web shop, the status of the delivery can be checked for every single item. Connect UK – Really our customers should try out the E-shop for themselves to see how easy it really is! How do they do that? Ian Sweatman – Indeed – all they need to do is go to their web browser and type in portal.weidmueller.com/LoginRedirect/login.jsp.
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TERMINAL EARTHING & TECHNOLOGY
Differences Between Earthing and Shielding The terms “earthing” and “shielding” are classified according to their relation to human safety or facility safety. The earth is installed primarily to protect human life, and for this reason, is referred to as the protective earth conductor. On the other hand, shielding is used to ensure that the electrical system functions properly. It also ensures electromagnetic compatibility. These main differences between the two terms influence electrical design and installation. Shielding is not designed to transfer power, although leakage currents may flow on them. A protective earth conductor, however, must be able to briefly discharge a high fault current (IEC 60947-7-2). The short-term current resistance of the PE connection must be 120 A/mm² for the connected cross-section.
In the picture above, the cable’s shielding is connected to the earth potential so that the shield’s current can be discharged. Depending on the sensitivity of the facility, isolated areas of potential can be created. However it is still typical to mix the areas, so that the shielding is on a common equipotential earth. This illustration shows how the number of shields and PE conductors that need to be connected can increase quite rapidly (in this case only one component is used). The shielding and earthing systems must be planned carefully to provide adequate safeguards for personnel and equipment. Earthing - Protective earth As mentioned previously, the protective earth is used to protect human lives. The electrical parameters that are relevant include the loop resistance and the short-term current resistance. The protective earth must be marked green-yellow; this colour combination is assigned uniquely and may not be used for other functions. This applies to both conductors and terminal blocks. The protective earth prevents electric shock that could be caused from voltages on housings and enclosures. So the protective earth should be intermeshed in order to improve safety. The mesh creates alternative conductive paths and ensures a low-ohm connection. The impedance and thus the length of the line is of secondary importance. The protective earth is also an integral part of the electrical infrastructure with its protective units (fuses and residual current circuit breakers). The green-yellow terminal blocks may also be used as a functional earth. However the reverse is not allowed.
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Weidmüller’s wide range of green-yellow terminal blocks all feature the PE function; the specific white versions also have this function (refer to functional earth). Functional earth The functional earth is an equipotential bonding mechanism that is used to discharge shield-coupled transient currents. It can also have a PE function when used with equipment that has potentially hazardous voltage levels. The same applies for couplings to grounding lines inside equipment – these must also be discharged. DIN VDE 0113 and VDE 0197 differ according to FE and PE because there is a degree of freedom when designing the functional earth, but the protective earth must conform to clear requirements. PE terminal blocks, which are intended to protect human life, must be labelled green-yellow. They can still be used for functional earthing though. White PE terminals (FE) may be used as the functional earth. Even the symbols used here have been extended in order to clarify the functional earth. In contrast to the protective earth, a meshing is not useful for the functional earth: instead wiring in a star topology makes more sense. This creates a so-called “clean“earth because compensation currents are not possible when this type of wiring is used. In such a case, the key is a low impedance connection. The length of the line is also a critical factor.
TERMINAL EARTHING & TECHNOLOGY
For systems where this distinction must or should be made, Weidmüller offers white PE terminal blocks from the W and Z-series. These terminals are easily identified through their colouring, showing that the circuits are only there to functionally protect the electrical systems that are connected. In practice though, the shield is still often twisted and connected to a terminal point There is very high attenuation (voltage drop) on these connections, especially for high-frequency interference. Therefore this type of shielding should not be used, even for short cable lengths. The cable shield is practically negated and can, at best, be helpful for low-frequency interference. We recommend a large, extensive contact with the braided shield of the cable. There are four main types of coupling: • Galvanic coupling • Capacitive coupling • Inductive coupling • Radiation coupling Such interferences usually occur mixed together, but they can be categorised as follows: • Electromagnetic fields • Ripple voltage (50 Hz) • Lightning • Interference pulses (current, voltage) • Transient surge voltages • Radio interference • Burst • ESD (electrostatic) • Mains feedback The conductor “flow” is another detail for concern with the shield contact. The temperature changes caused by the current flow lead to changes in the wire’s diameter. A rigid contact can therefore only be partially effective. A self-adjusting contact is what is really required. Weidmüller’s clamping yoke products (KLBÜ) provide the perfect solution for this challenge.
Our line of clamping brackets is a proven solution for connecting the shield. To increase the versatility of this product line, the CPF16 and FM4 variants have been added. The CPF16 can be mounted to a 16-mm wide C-rail and the FM4 comes in a prepared kit for mounting to the DIN rail. Outlook The frequencies being used are a significant factor on the design of the earth and the shield. It is difficult to separate these two themes. The distinction is made only when there are known or suspected problems. The number of data lines, processors and frequency converters in use is increasing steadily – thus EMC problems are increasing simultaneously. Troubleshooting an EMC disturbance is quite difficult. Problems that come up are often addressed simply through trial and error. This is especially true for irregular disturbances (transients). Thus issues such as wiring, potential equalisation and shielding will continue to become more important in the future. Their functional solutions will also become very important. The separation of power, control and signal lines is certainly only the first step in an increasingly complex methodology. Already in certain applications it isn’t sufficient to merely apply the shield on both sides. Other solutions are also needed. We are continuously expanding our product line so that we can provide custom-fit customer solutions whenever and wherever they are needed. We will also make sure that we have the appropriate products to solve your future problems.
Terminal Technology Increasing functionality, more compact designs and increasing complexity of equipment and installations place higher demands on the selection of the correct connection technology. Simple installation, reliability and easy maintenance of systems and equipment depend on choosing the right type of connection. With over 60 years of developing and manufacturing modular terminals for industrial segments such as process, energy, transportation and machinery to name a few, we are continuing to lead the way with new innovative solutions to connect power, signal and data. Our latest additions are the WMF and PRV. We offer a free choice of connection technology ranging from our original “yoke clamping” technology which is still going strong today, through to screwless technologies such as “tension clamp” and “push in”. In addition, application specific connections such as “leaf spring”, “TOP connection” and insulation displacement connection technologies complement our offer. Our products meet the latest international and national standards including IEC 60947-7-1 for low voltage switchgear and control gear. Wide operating temperatures enable our terminals to be used in harsh climates and in order to do justice to the most diverse requirements placed on our products, it is necessary to use different insulating materials tailored to the needs of the applications. To learn more, request your personal copy of our brochure “Modular Terminal Technology” while stocks last. Electronic copies are available by sending a request to marketing@weidmuller.co.uk.
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Weidm端ller - Partner in Industrial Connectivity As experienced experts we support our customers and partners around the world with products, solutions and services in the industrial environment of power, signal and data. We are at home in their industries and markets and know the technological challenges of tomorrow. We are therefore continuously developing innovative, sustainable and useful solutions for their individual needs. Together we set standards in Industrial Connectivity.
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Let's Connect. Weidmuller Ltd. Back Issues: If you would like to order any back issues of Connect UK simply email us at marketing@weidmuller.co.uk Contributors to this issue Editors
lesley.young@weidmuller.co.uk
Designer
ashley.hutchinson@weidmuller.co.uk
Tools Overview
adrian.hinks@weidmuller.co.uk
OMNIMATE
ivor.hunt@weidmuller.co.uk
Electronics
peter.croucher@weidmuller.co.uk
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