Operating manual
Maintenance Electrical system
5.14 Electrical system 5.14.1
Low and high voltage circuit Danger! For any maintenance or repair near the LOW and HIGH VOLTAGE circuit, personnel have to be certified and qualified according to their competences and authorized by their employer to work on an electrical installation. Current practices have to respect local safety regulations for electrical installations (wear of adapted PPE, works on electrical installation, lockout procedures, etc...). Always use adapted tools for the voltage. Any work or maintenance on the LOW and HIGH VOLTAGE circuit or boxes must be done with power totally disconnected and the concerned electrical circuit must be locked out according to local regulations by the electrician. For any repair for a fault with HIGH VOLTAGE > 1000V, the excavator must be completely disconnected from the network. Only electrical personnel are allowed to operate according to local regulations. For any repair for a fault with LOW VOLTAGE < 1000V till 24V, minimum approach distance for any conductive object must be observed. For low tension electrical cabinet and repair with power switched on, electrical personnel are under obligation to disconnect any accessible conductive object and to border the working area with banner, safety nets, fences, etc...
5.14.2
Standby heating supply By pushing the button S184 («Control OFF») inside the cabin or any emergency switch, main breaker Q2A in high voltage electrical box S1 will open. High voltage still supplies S1 transformer T5M for anti-condensation heaters and for -40°C heating system (optional). Danger! Standby supply presence on machine. Before any maintenance or work on electric HV/LV installation, the electric supply of the machine must be totally locked out at field switch. Standard lockout procedure to disconnect totally the excavator: Locate power station supply and distribution.
LEC/en/Edition: 03 / 2021
Stop excavator, disconnect excavator from the network at field switch. Check voltage presence on excavator supply line. Earth and short-cut the supply line. Lockout and tag out at field switch. Identify (i.e. check that ignition of Open S1. Open Q1A manual switch and use red lever to earth the uppercarriage. Close S1 and keep key in a safe place.
P 9250 E / 10360975
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