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CONFIGURATIONS

The most popular configuration for magnetic protectors is the series trip where

the sensing coil and contacts are in series with the load being protected. In

addition to providing conventional overcurrent protection, the handle position

conveniently indicates circuit status.

This is furnished as an integral part of a series pole in single or multi-pole

assemblies. Isolated electrically from the protector’s circuit, the switch

works in unison with the power contacts and provides indication at a remote

location of the protector’s on-off status.

Auxiliary switch contacts actuate simultaneously with the main breaker

contacts, and will open regardless of whether the breaker contacts are

opened manually or electrically. For auxiliary switch ratings below 6Vac or

5Vdc, an auxiliary switch with gold contacts, designated as REG, is available.

Gold contacts are not recommended for load current above 100 milliamps.

An optional auxiliary switch, RS, configuration allows an alarm or signal to

be forwarded only upon electrical overload, allowing for easier detection of

fault circuit.

Series Trip

Auxiliary Switch (Applies to Series Trip Only)

Typical Resistance/ Impedance

Current Ratings

(Amps)

Series Type (Except delays 40, 50, 60)

DC

(ohms)

AC, 50/60Hz

(ohms)

AC, 400Hz

(ohms)

0.050

427

478

-

0.100

100

103

204

0.250

19

20

34

0.500

4.6

6.3

8.2

0.750

2.04

2.06

3.52

1.00

0.91

0.92

1.86

2.50

0.17

0.19

0.28

5.00

0.045

0.046

0.073

7.50

0.018

0.019

0.037

10.0

0.013

0.014

0.020

15.0

0.0072

0.0073

0.019

20.0

0.005

0.0051

-

25.0

0.003

0.0035

-

DCR and Impedance values are based on measurements by the voltmeter

ammeter method. Rated current is applied for one hour and at a voltage not

less than 20 volts. Ambient temperature: 25 C; Tolerance: Below 10 amps ±

25%; Above 10 amps ± 50%; *Consult factory for special values and for coil

impedance of delays not shown.

[35.13]

1.383

[25.77]

1.015

[26.00]

1.024

[9.58]

.377

C

NO

NC

LINE

LOAD

C

NO

NC

LINE

LOAD

C

[19.68]

.775

[9.37]

.369

[18.52]

.729 MAX.

NO

NC

LINE

LOAD

C

NO

NC

LINE

C-NC = Breaker in

“OFF” position.

Breaker in “ON” or manually

turned “OFF” position.

Breaker in electrically tripped

“OFF” position.

Series with

Auxiliary Switch

Auxiliary Alarm

Switch (IRS4, IRSG4)

Series with Auxiliary Switch

LINE

LOAD

Series

[35.13]

1.383

[3.43]

.135

Switch

LOAD

LINE

Series Trip

Notes:

1. Main circuit protector terminals are stationary male push-

on type: .248 [6.30] wide x .031 [.787] thick x .474 [12.00] long,

or screw type: M4 x .354 [8.99] wide x .031 [.787] thick x .474

[12.00] long.

2. Auxiliary switch terminals are: .110 [2.79] wide x .020 [0.51]

thick x .343 [8.71] long.

3. Tolerance ± .015 [.38] unless noted. Dimensions in brackets [

] are millimeters.