TB 1-1730-229-30-03
______ m. Set AGPU AC POWER SWITCH to RESET and return to OFF.
______ n. Set AGPU CURRENT LIMIT SELECTOR and load bank in accordance with the following
table. Run system at load specified for 5 minutes at each step.
NOTE
After each load test, set load bank to off and set AGPU AC POWER
SWITCH to RESET and return to OFF.
AGPU CURRENT LIMIT
SET LOAD BANK:
AC% Load
VAC @ Phase A
SELECTOR: A/D MODEL
A/D MODEL
10 KW/ 17 KVA
10 KW/ 15 KW
20 KW/ 38 KVA
20 KW/ 30 KW
30 KW/ 59 KVA
30 KW/ 45 KW
/ 90 KVA
/ 70 KW
4.5.3.2 Surge Valve Operation.
_____ a. Place Surge valve switch to off position.
EGT: _______F
_____ b. Record EGT reading.
_____ c.
Place Surge valve switch in on position. (90KVA)
EGT: _______F
_____ d. Record EGT reading.
NOTE
EGT should rise 75-200 degrees and sound level should increase when
the surge valve switch is activated. The EGT should also decrease the
same amount when the switch is turned off. If desired results are not
observed, stop and check pneumatic system and new muffler on D
models.
4.5.3.3 MEP-360A AC Current Limit Test.
_____ a. Set AGPU CURRENT LIMIT SELECTOR to 45 KW and the AC power switch to on.
_____ b. On the electrical load bank, set LOAD SWITCH to ON. Adjust load bank for 133% on the
AGPU AC % LOAD meter (138 Amps).
EGT: _______F
Check that load meter on AGPU indicates 133% load
________AC % Load
_____ c.
After 30 seconds, set the load bank to 55 KW. Within 4 to 7 seconds, the OVER CURRENT
lamp will illuminate, the AGPU AC contactor will open, the UNDER VOLTAGE lamp will
illuminate, and the AC POWER ON lamp will go out. Record the time taken for the
AC POWER ON lamp to go out after the OVER CURRENT lamp illuminates.
TIME: ______ sec
30