Ferroresonant L-828/L-829 CCR Maintenance
2009 ADB Airfield Solutions, Incorporated
96A0288T 5-3
All rights reserved Issued 9/04
WARNING: Since high open-circuit voltages may result by
opening the primary of a series lighting circuit, only personnel
authorized to work on high-voltage equipment should be
allowed to perform the short-circuit test.
To perform the short-circuit test, perform the following procedure:
1. Remove input power to the regulator (turn off disconnect switch or
main circuit breaker) and turn the rotary switch to OFF.
2. Remove leads from output terminals and bushings. Use AWG 8 or
larger wire to short output bushings.
3. Energize the regulator and turn the rotary selector switch to the lowest
brightness step (1) and then to the remaining brightness steps. Check
the output current on the ammeter at each step.
NOTE: The output current should be within the tolerance given in
Table 2-9. The panel meter is intended to indicate function. Any
calibrations should be performed with a calibrated true RMS current
meter.
4. If the output current is not within the limits specified in
Table 2-9 check the input voltage to the regulator. The supply voltage
should be within –5% to +10% of the nominal input voltage given on
the regulator nameplate. Refer to Adjustment Procedures in the
Operation section.
5. Turn off disconnect switch or main circuit breaker to remove input
power to regulator.
6. Disconnect the shorting jumper and reconnect output cables.
7. Close input-power disconnect switch or main circuit breaker.
WARNING: Since high open-circuit voltages may result by
opening the primary of a series lighting circuit, only personnel
authorized to work on high-voltage equipment should be
allowed to perform the open-circuit test.
To perform the open-circuit test, perform the following procedure:
1. Remove input power to regulator (turn off disconnect switch or main
circuit breaker) and turn the rotary switch to OFF.
2. Disconnect cables from the output terminals and bushings.
3. Maintenance Schedule
(contd.)
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