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.
