Page 1

UL Sizing Chart (1 Phase) HP

Volts

1/10 1/8 1/6 1/4 1/3 1/2 3/4 1 1 1/2 2 3 5 7 1/2 10 15

120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230 120 230

Cerus Motor Overload

Bend Motor Wire Size Radius* Amps (AWG) (Inches)

Contactor

3.0 1.5 3.8 1.9 4.4 2.2 5.8 2.9 7.2 3.6 9.8 4.9 13.8 6.9 16.0 8.0 20.0 10.0 24.0 12.0 34.0 17.0 56.0 28.0 80.0 40.0 100.0 50.0 135.0 68.0

MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-12 MRC-9 MRC-18 MRC-9 MRC-18 MRC-9 MRC-25 MRC-12 MRC-25 MRC-18 MRC-40 MRC-18 MRC-63 MRC-32 MRC-85 MRC-40 CRC-100 MRC-63 CRC-150 CRC-75

12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 10 12 8 12 6 10 4 8 3 8 1/0 4

1.5 2 3 1.5 3 1.5 5 2

Thermal MTK-32/3-4 MTK-32/3-1.6 MTK-32/3-4 MTK-32/3-2.5 MTK-32/3-6 MTK-32/3-2.5 MTK-32/3-8 MTK-32/3-4 MTK-32/3-8 MTK-32/3-4 MTK-32/3-13 MTK-32/3-6 MTK-32/3-18 MTK-32/3-8 MTK-32/3-18 MTK-32/3-9 MTK-32/3-25 MTK-32/3-13 MTK-32/3-25 MTK-32/3-13 MTK-63/3-40 MTK-32/3-22 MTK-63/3-65 MTK-32/3-32 MTK-95/3-85 MTK-63/3-50 CTK-100/3-125A MTK-63/3-65 CTK-150/3-150 CTK-85/3-75

Electronic

Manual Motor Starter

Motor Circuit Protector

CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3S 22A CRP22-3P 5A CRP22-3S 22A CRP22-3P 5A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP40-3S 40A CRP22-3S 22A CRP40-3S 40A CRP22-3S 22A CRP80-3S 80A CRP40-3S 40A CRP80-3S 80A CRP80-3S 80A CRP80-3S-80A

CMS-32HI-4 CMS-32HI-1.6 CMS-32HI-4 CMS-32HI-2.5 CMS-32HI-6 CMS-32HI-2.5 CMS-32HI-8 CMS-32HI-4 CMS-32HI-8 CMS-32HI-4 CMS-32HI-13 CMS-32HI-6 CMS-32HI-17 CMS-32HI-8 CMS-32HI-17 CMS-32HI-10 CMS-32HI-22 CMS-32HI-13 CMS-32HI-26 CMS-32HI-13 CMS-63HI-40 CMS-32HI-22 CMS-63HI-63 CMS-32HI-32 CMS-100HI-90 CMS-63HI-50 CMS-63HI-63 CMS-100H-75

CMS-32HI-4 CMS-32HI-1.6 CMS-32HI-4 CMS-32HI-2.5 CMS-32HI-6 CMS-32HI-2.5 CMS-32HI-6 CMS-32HI-4 CMS-32HI-8 CMS-32HI-4 CMS-32HI-10 CMS-32HI-6 CMS-32HI-17 CMS-32HI-8 CMS-32HI-17 CMS-32HI-8 CMS-32HI-22 CMS-32HI-10 CMS-32HI-26 CMS-32HI-13 CMS-63HI-40 CMS-32HI-17 CMS-63HI-63 CMS-32HI-32 CMS-100HI-90 CMS-63HI-40 CMS-100HI-100 CMS-63HI-50 CMS-100HI-75

Motor Engineering Formulas Legend E = Volts I = Amps W = Watts PF = Power Factor Eff = Efficiency HP = Horsepower 1HP = 746 Watts

AC/DC Formulas Single Phase

Three Phase

Amps when HP is known

To Find

HP x 746 E x Eff

HP x 746 E x Eff x PF

HP x 746 1.73 x E x Eff x PF

Amps when kW is known

kW x 1000 E

kW x 1000 E x PF

kW x 1000 1.73 x E x PF

Amps when kVA is known

-

kVA x 1000 E

kVA x 1000 1.73 x E

ExI

IxE 1000

I x E x PF 1000

I x E x 1.73 x PF 1000

P R

-

IxE 1000

I x E x 1.73 1000

I x E x Eff 746

I x E x Eff x PF 746

I x E x Eff x 1.73 x PF 746

Kilowatts Kilovolt (Amps) Horsepower (Output)

AC Efficiency & Power Factor Formulas To Find Efficiency Power Factor

Single Phase

Three Phase

746 x HP E x I x PF

746 x HP E x I x PF x 1.732

Input Watts VxA

Input Watts E x I x PF x 1.732

www.cerusind.com 1.800.962.3787

Ohm’s Law E2 I2 x R R

P E

IxR

P I

P E I R E R

P I2

PxR

E2 P

E I

Motor Application Formulas Horsepower = Torque (lb-ft) x RPM 5252 Torque (lb-ft) = Horsepower x 5252 RPM


UL Sizing Chart (3 Phase) HP

1/2

3/4

1

1 1/2

2

3

5

7 1/2

10

15

20

25

30

40

50

60

75

100

125

150

Volts 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480 208 230 480

Bend Motor Wire Size Radius Amps (AWG) (Inches) 2.4 2.2 1.1 3.5 3.2 1.6 4.6 4.2 2.1 6.6 6.0 3.0 7.5 6.8 3.4 10.5 9.6 4.8 16.7 15.2 7.6 24.0 22.0 11.0 31.0 28.0 14.0 46.0 42.0 21.0 59.0 54.0 27.0 75.0 68.0 34.0 88.0 80.0 40.0 114.4 104.0 52.0 143.0 130.0 65.0 169.4 154.0 77.0 211.2 192.0 96.0 272.8 248.0 124.0 343.2 312.0 156.0 396.0 360.0 180.0

12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 10 10 12 8 10 12 8 8 10 6 6 10 4 4 8 3 4 8 2 2 6 1/0 1 6 2/0 2/0 4 4/0 3/0 3 2 x 1/0 2 x 1/0 1 2 x 2/0 2 x 2/0 2/0 2 x 3/0 2 x 3/0 3/0

* Field wiring requires two conductors

1.5 1.5 1.5 1.5 2 2 2 2 1.5 2.5 2 1.5 5 3 1.5 7 6 2 7 7 2 10 8 3 12 12 6 14 14 7 8* 7* 7

Cerus Motor Overload Contactor MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-9 MRC-12 MRC-12 MRC-9 MRC-18 MRC-18 MRC-9 MRC-25 MRC-25 MRC-12 MRC-35 MRC-32 MRC-18 MRC-50 MRC-50 MRC-25 MRC-63 MRC-63 MRC-32 MRC-75 MRC-75 MRC-35 MRC-95 MRC-85 MRC-50 CRC-125 CRC-125 MRC-63 CRC-180 CRC-150 MRC-75 CRC-180 CRC-180 MRC-85 CRC-300 CRC-220 CRC-125 CRC-300 CRC-300 CRC-150 CRC-400 CRC-400 CRC-180 CRC-600 CRC-400 CRC-220

Thermal MTK-32/3-2.5 MTK-32/3-2.5 MTK-32/3-1.6 MTK-32/3-4 MTK-32/3-4 MTK-32/3-1.6 MTK-32/3-6 MTK-32/3-6 MTK-32/3-2.5 MTK-32/3-8 MTK-32/3-8 MTK-32/3-4 MTK-32/3-9 MTK-32/3-9 MTK-32/3-4 MTK-32/3-13 MTK-32/3-13 MTK-32/3-6 MTK-32/3-18 MTK-32/3-18 MTK-32/3-9 MTK-32/3-25 MTK-32/3-25 MTK-32/3-13 MTK-63/3-36 MTK-32/3-32 MTK-32/3-18 MTK-63/3-50 MTK-63/3-50 MTK-32/3-25 MTK-63/3-65 MTK-63/3-65 MTK-32/3-32 MTK-95/3-85 MTK-95/3-75 MTK-63/3-40 MTK-95/3-95 MTK-95/3-85 MTK-63/3-50 CTK-100/3-125A CTK-100/3-125A MTK-63/3-65 CTK-220/3-180A CTK-150/3-150A MTK-95/3-75 CTK-220/3-180A CTK-220/3-180A MTK-95/3-85 CTK-400/3-240A CTK-220/3-240A CTK-100/3-125A CTK-400/3-300A CTK-400/3-300A CTK-150/3-150A CTK-400/3-400A CTK-400/3-400A CTK-220/3-180A CTK-600/3-400A CTK-400/3-400A CTK-220/3-240A

Electronic

Manual Motor Starter

Motor Circuit Protector*

CRP22-3P 5A CRP22-3P 5A CRP22-3S 1.5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3P 5A CRP22-3S 22A CRP22-3S 22A CRP22-3P 5A CRP22-3S 22A CRP22-3S 22A CRP22-3P 5A CRP22-3S 22A CRP22-3S 22A CRP22-3P 5A CRP22-3S 22A CRP22-3S 22A CRP22-3S 22A CRP40-3S 40A CRP40-3S 40A CRP22-3S 22A CRP40-3S 40A CRP40-3S 40A CRP22-3S 22A CRP80-3S 80A CRP80-3S 80A CRP40-3S 40A CRP80-3S 80A CRP80-3S 80A CRP40-3S 40A CRP80-3S 80A CRP80-3S 80A CRP40-3S 40A CRP80-3S 80A CRP80-3S 80A CRP80-3S 80A CRP80-3S 80A -

CMS-32HI-2.5 CMS-32HI-2.5 CMS-32HI-1.6 CMS-32HI-4 CMS-32HI-4 CMS-32HI-1.6 CMS-32HI-6 CMS-32HI-6 CMS-32HI-2.5 CMS-32HI-8 CMS-32HI-8 CMS-32HI-4 CMS-32HI-8 CMS-32HI-8 CMS-32HI-4 CMS-32HI-13 CMS-32HI-13 CMS-32HI-6 CMS-32HI-22 CMS-32HI-17 CMS-32HI-10 CMS-32HI-26 CMS-32HI-26 CMS-32HI-13 CMS-63HI-40 CMS-32HI-32 CMS-63HI-50 CMS-63HI-50 CMS-32HI-26 CMS-63HI-63 CMS-63HI-63 CMS-32HI-32 CMS-100HI-90 CMS-100HI-75 CMS-63HI-40 CMS-100HI-100 CMS-100HI-90 CMS-63HI-50 CMS-63S/H-50 CMS-63HI-63 CMS-100HI-75 CMS-100HI-90 CMS-100HI-100 -

CMS-32HI-2.5 CMS-32HI-2.5 CMS-32HI-1.6 CMS-32HI-4 CMS-32HI-4 CMS-32HI-1.6 CMS-32HI-6 CMS-32HI-6 CMS-32HI-2.5 CMS-32HI-8 CMS-32HI-8 CMS-32HI-4 CMS-32HI-8 CMS-32HI-8 CMS-32HI-4 CMS-32HI-13 CMS-32HI-10 CMS-32HI-6 CMS-32HI-22 CMS-32HI-17 CMS-32HI-8 CMS-32HI-26 CMS-32HI-26 CMS-32HI-13 CMS-63HI-40 CMS-32HI-32 CMS-32HI-17 CMS-63HI-50 CMS-63HI-50 CMS-32HI-26 CMS-63HI-63 CMS-63HI-63 CMS-32HI-32 CMS-100HI-90 CMS-100HI-75 CMS-63HI-40 CMS-100HI-100 CMS-100HI-90 CMS-63HI-50 TS250NU ATU 250 250A TS250NU ATU 250 250A CMS-63HI-63 TS400NU ATU 400 400A TS400NU ATU 400 300A CMS-100HI-75 TS400NU ATU 400 400A TS400NU ATU 400 400A CMS-100HI-90 TS800NU ATU 800 500A TS800NU ATU 800 500A CMS-100HI-100 TS800NU ATU 800 600A TS400NU ATU 400 300A TS800NU ATU 800 800A TS800NU ATU 800 800A TS400NU ATU 400 400A TS400NU ATU 400 400A

/ULSizingCharts  

http://www.cerusonline.com/catalog/documents/Calculators/ULSizingCharts.pdf

Read more
Read more
Similar to
Popular now
Just for you