Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
6 - 18 Testing
Issue 10 July 2000
Phase Failure Test
1. With the Power switch still On, turn off the ac service and note
that the rectifier shuts down.
2. Verify that no ac voltage is present on the input leads of the ac
contactor K1.
3. Disconnect one input lead, L1, L2, or L3 on K1, or at the ac
service panel, whichever is more convenient. Insulate the lead.
4. Turn on the ac at the service panel. The rectifier should not restart.
5. Turn off the ac at the service panel and reconnect the input lead.
6. Turn on the ac at the service panel. The rectifier should restart.
Backup High
Voltage Shutdown
(HVSD) Test
1. Turn both the rectifier Power Switch and DC Output circuit
breaker OFF (down). At the plant controller (if present), remove
the regulation fuse assigned to the rectifier being tested.
2. Set a DMM to measure 54 volts, and connect it between the
rectifier input conductor at the bottom of CB1 and dc output
return.
3. Slowly turn the Float Adj potentiometer clockwise until the
rectifier shuts down. This should occur at the voltage
corresponding to the switch settings for BUHVSD. (Factory
setting is 59.5 ± 0.5 volt at no load.) The RFA lamp on the rectifier
should light.
4. Turn the Float Adj potentiometer counterclockwise four turns.
5. Restart the rectifier by turning the Power switch Off then back
On.
6. Adjust the voltage to approximately 52.0 volts. The RFA lamp on
the rectifier should go out.
7. Turn OFF the rectifier Power Switch once again, and CLOSE
(turn on) the DC Output circuit breaker (up) within 5 seconds.
The, at the plant controller (if present), replace the regulation fuse
assigned to the rectifier being tested (removed in Step 1). Now,
turn ON the rectifier Power Switch once again, and turn the Float
Adj potentiometer on the front display clockwise to return the
rectifier output voltage to the plant float level where it accepts
load from any other rectifiers on the distribution bus.