Multi-Pole Molded Case Breakers - ETI PI-800-GEN2 Instruction Manual

Electrical Test Instruments PI-800 GEN2 and PI-1600 GEN2
Instantaneous Trip Time Test
1. Perform Instantaneous Pickup Test as outlined above.
2. Adjust controls to obtain current above pickup, at approximate desired
multiple of rating.
3. Close breaker under test.
4. Press the INITIATE button. Breaker should trip instantaneously.
5. Read and record timer and ammeter readings as instantaneous trip time
and current.
6. Shut down test set, disconnect breaker, and prepare for subsequent test-
ing or relocation according to steps 19 through 23 in pre-test installation
and setup outlined above.
MULTI-POLE MOLDED CASE CIRCUIT BREAKERS
Timing Test
1. Consult breaker manufacturer's literature to determine any necessary pre-
cautions and expected test results. A test current of three times the rating
of the breaker should be used for this test.
2. Follow steps 1 through 17 in pre-test installation and setup, as required, to
set up the breaker test set.
3. Connect appropriate output tap to one pole of breaker under test.
4. Setup MAC-21 for C.L. Maint (MAINTAIN on).
5. Set MAC-21 RANGE to lowest range that is greater than desired test cur-
rent.
6. Set TIMEBASE to CYCLES.
7. Press PRESET key. Adjust preset time to 5.0 cycles. This value may be set
higher or lower, depending on trip characteristics of breaker.
8. Press PRESET again to return to normal mode.
9. Select MEMORY mode.
10. Repeatedly jog the INITIATE button, while adjusting the OUTPUT
CONTROL higher, until the desired test current is read on the ammeter. If
insufficient current is obtained at maximum position of the vernier, set the
OUTPUT TAP control to the next higher tap, return the vernier to zero, and
continue.
11. Press RESET button.
12. Set TIMEBASE to SECONDS.
13. Select MAINTAIN mode.
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