Electrical And Mechanical Accessories; Trip Unit Operation; Test Menu; Autotest - Allen-Bradley 140G-R Installation Instructions Manual

8.4.6

Electrical and mechanical accessories

- Make sure that internal accessories (i.e. shunt, spring charging motor) are securely mounted in the circuit breaker.
- Make sure the control circuit and fi eld connects terminals are tightened (6 lb-in / 0.7 Nm).
- Spring Charging Motor: After every 10,000 operations, inspect brushes for wear and replace the motor if necessary.
- Inspect internal accessories (i.e. Shunt trip, Shunt Close & UV relay) for absence of excessive wear, overheating and breakage,
Fig. 29.
- Test the mechanical counter (by operating the circuit-breaker) for proper functionality.
!
WARNING: in case of trip coil set substitution refer to par. 4.5.2
1
Fig. 29
8.4.7

Trip Unit Operation

Power a trip unit with a battery accessory 140G-ELBU and verify proper functionality.

8.4.7.1 Test Menu

The Test menu provides various options for checking the trip unit and CB.
Up to 5 options ara available:
Name
1. CB status
2. Auto Test

3. Trip Test

4. MM Test module

8.4.7.2 Autotest

When autotest is activated, the display and leds will perform a test procedure allowing the user to check the state of display and
operation of the leds themselves.
The procedure lasts several second and the sequence is as follows:
Phase ALARM AND WARNING leds Display
1 On and fi xed
2 Off
3 Normal operation
The test result and assessment are at the user's discretion. Inform AB if faults occur (Leds fail to function, display areas that fail
to function correctly)
8.4.7.3 Trip test
The state of CB opening can be checked by activating the trip test.
The trip unit sends a command to the CT, which activates a CB opening mechanism. Opening of the circuit-breaker denotes a
positive test result.
! ATTENTION: To perform the trip test, there must be no current circulating and the CB must be closed
(failing this, the Exception 6 error will appear).

8.4.7.4 MM test

The test menu is available with the MM trip unit version. 2 possible option can be selected:
- Auto Test causes contacts 95s/98s to close for 1s.
- Input allows the state of inputs K14/K15 to be verifi ed: On for 15 VDC voltage values, Off for < 2 VDC voltage values.
The verifi cation and test setup are at the user's discretion and must comply with the maximum limits of the inputs and outputs.
DIR 1000682R0002 Version 03
Description
allows the user to view the CB state read by the trip unit
allows the display and led test to be performed
allows an opening command to be transmitted to the CB
allows output 95S/98S to be checked and the state of K14/K15
The words "ALLEN-BRADLEY" and message with the name of "LSIG-MM"
Flashing backlighting (only if 24V DC supply is present)
Contrast from 100% (display dark) to 0% (display light), after which the words and
logo reapper
3 17.7 lb-in
2 Nm
(19)
2