Cooper Bussmann Power Module PS - Manual (Page 2)

Bussmann ® Power Module ™ Switch PS
All-In-One Module
Form No. PS
Page 2 of 5
BIF Doc# 1145
Standard Shunt Trip Ratings
Amp Max Max 1 Momentary
Rating Voltage Inrush Ontime Inrush
30-100
200 120V, 60HZ 4 amps 1.5 cycles 140VA
400
Bussmann ® Power Module™ Switch – Dimensions and Lug Data
Catalog NEMA 1 NEMA Depth
Number Amp Dimensions 1 Depth 3R, 12 2 3R,12 Lug Size 3
PS3 30 20∑H ≈ 16∑W 8fiΩ•∑ 20∑H ≈ 20∑W 8∑ #14 - #8 Al or Cu
PS6 60 20∑H ≈ 16∑W 8fiΩ•∑ 20∑H ≈ 20∑W 8∑ #14 - #2 Al or Cu
PS1 100 20∑H ≈ 16∑W 8fiΩ•∑ 20∑H ≈ 20∑W 8∑ #8 - 1/0 Al or Cu
PS2 200 30∑H ≈ 20∑W 8fiΩ•∑ 30∑H ≈ 24∑W 8∑ #6 - 250 kcmil Al or Cu
PS4 400 55∑H ≈ 40∑W 13∑ — — (2) 3/0 - 500 kcmil Al or Cu
1 Standard over size enclosure to mount control power transformer fire safety interface relay and control terminal blocks.
2 Contact factory for dimensions for NEMA 4 enclosure.
3 Optional neutral lug size same as line and load.
Maximum Horsepower Rating of Switch – Sizing Based on Motor Type
Amp Rating of Switch
30A 60A 100A 200A 400A
PS3 PS6 PS1 PS2 PS4
Voltage A B C A B C A B C A B C A B C
208AC-3P 5 5 3 10 10 10 20 15 15 40 40 30 75 75 60
240AC-3P 5 5 5 10 10 10 20 20 15 50 40 30 125 75 75
480AC-3P 10 10 10 30 25 20 50 40 30 100 75 75 250 150 150
600AC-3P 15 15 10 30 30 25 60 50 40 125 100 100 250 200 200
Column Sizing Guidelines:
A Maximum horsepower rating of switch with Class J fuses, light-duty inrush
B Maximum horsepower rating of switch with Class J fuses, medium-duty inrush
C Maximum horsepower rating of switch with Class J fuses, heavy-duty or typical elevator cross line start
The above table can be used for estimating switch size for motor loads based upon the motor horsepower. Size the switch so that
the Class J, time-delay fuses are used at a minimum of 150% of motor full load amps or next size up (for light starting duty
applications, Column A). For general applications, excluding wound rotor and DC motors, NEC
® 430-52 allows sizing at 175%
of motor full load amps or the next standard size per NEC 240-6 (Column B). If sizing at 175% will not allow the motor to start,
NEC 430-52 will allow the fuses to be sized up to 225% of motor full load amps or the next size down (Column C).
Note: In sizing the fuses, the motor FLA, is per Table 430-150, not per nameplate information.
Inrush currents of motors may vary, consult motor manufacturer data for correct sizing.
On elevator applications, motor load plus auxiliary loads need to be considered. Follow elevator manufacturer’s
recommendation for correct fuse sizing. For estimation purposes only, Column C can be used as a conservative
approximation.
Bussmann
®
8-29-01 XXXXXX
1 Will handle up to 447VA inrush.