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9 – 101
Testing the current and energy sensors
To test the current sensors and energy transducers, press the "START" button.
A lit-up LED confirms the proper operation of the corresponding sensor/converter. If an LED flashes, the corresponding sensor/converter is
not present, not properly connected, nonconforming, or a transformer without power supply is connected.
Testing the tripping function
To test the tripping function, press one of the buttons "L", "S", "I", "N" or "G".
Long-time delayed tripping Test
If the test is successful, the "ETU STATUS" LED will light up a solid green. If errors are detected (the trip unit malfunctions),
the "ETU STATUS" LED will flash. Count the number of flashes to determine the fault (all fault codes are listed on page 9-104).
1
Charge the circuit breaker
2
Close the circuit breaker
3
Press the [L] button
The circuit breaker will trip after the set long-time delay time, plus approx. 2 seconds processing time, has elapsed. If the test device has
completed a test without faults, the "ETU STATUS" LED will light up continuously green. If a fault is detected, the LED will flash. The type of
flashing indicates what type of fault is present (fault codes are listed on page 9-104).
Short-time delayed tripping Test
The short-time delayed short-circuit tripping function and the trip unit circuitry can be tested using the test device.
1
Charge the circuit breaker
2
Close the circuit breaker
3
Press the [S] button
The circuit breaker will trip after the set short-time delay time, plus approx. 2 seconds processing time, has elapsed. If the test device has
completed a test without faults, the "ETU STATUS" LED will light up continuously green. If a fault is detected, the LED will flash. The type of
flashing indicates what type of fault is present (fault codes are listed on page 9-104).
Instantaneous tripping test
The instantaneous tripping function and the trip unit circuitry can be tested using the test device.
1
Charge the circuit breaker
2
Close the circuit breaker
3
Press the [I] button
The circuit breaker will trip after approx. 2 seconds processing time. If the test device has completed a test without faults, the "ETU STATUS"
LED will light up continuously green. If a fault is detected, the LED will flash. The type of flashing indicates what type of fault is present (fault
codes are listed on page 9-104).
START
I
L
S
N
G
L
S
I
Summary of Contents for UL 489
Page 36: ...5 21 Frame size II 3000 A Frame size III 1 Holes 14 mm 0720 1 0721_nu ...
Page 63: ...7 2 Horizontal connectors 0733_nu top view ...
Page 64: ...7 3 Rear vertical connectors 0734_nu top view rear view ...
Page 65: ...7 4 Front connectors 0736_nu front view top view ...
Page 66: ...7 5 Front connectors and pressure wire terminals 0737_nu top view front view ...
Page 67: ...7 6 7 2 Frame size II fixed mounted version 0494 3_nu ...
Page 68: ...7 7 Class C always 0494 5_nu top view rear view ...
Page 69: ...7 8 2500 0738_nu LH side view front view ...
Page 71: ...7 10 7 4 Frame size III fixed mounted version 0495 1_nu LH side view ...
Page 72: ...7 11 0495 2_nu top view top view ...
Page 73: ...7 12 0495 3_nu top view rear view ...
Page 75: ...7 14 7 5 Door cut outs fixed mounted circuit breaker Frame size I 0735_nu ...
Page 76: ...7 15 Frame size II III 0496_nu ...
Page 77: ...7 16 7 6 Frame size I draw out version 0745_nu ...
Page 78: ...7 17 0746_nu rear view top view ...
Page 79: ...7 18 0747_nu bottom view ...
Page 80: ...7 19 0748_nu ...
Page 81: ...7 20 0749_nu ...
Page 82: ...7 21 7 7 Frame size II draw out version 0490 1_ul ...
Page 86: ...7 25 7 8 Frame size III draw out version ...
Page 87: ...7 26 ...
Page 88: ...7 27 ...
Page 89: ...7 28 7 9 Door cut outs for draw out circuit breakers Frame size I 0750_nu ...
Page 91: ...7 30 7 11 External sensor for neutral conductor WLNCT2 ...
Page 92: ...7 31 WLNCT3 ...
Page 107: ...9 5 I tripping Ground fault tripping ...
Page 351: ......