Ferroresonant L-828/L-829 CCR Maintenance
2009 ADB Airfield Solutions, Incorporated
96A0288T 5-2
All rights reserved Issued 9/04
To keep the L-828/L-829 CCRs operating efficiently, follow a preventive
maintenance schedule. Refer to Table 5-1.
Table 5-1 L-828/L-829 CCR (4-70 kW/6.6 A/20 A) Maintenance
Check all control equipment for proper
operation.
Check local and remote control (if used) on
each brightness step.
If input voltage is not within -5% to +10% of
the nominal value specified on the nameplate
of the regulator, notify power company to
correct voltage.
Check and record output current on each
brightness step.
Use a true rms-reading instrument. Adjust
current levels if out of tolerance. Refer to
Adjustment Procedures in the Operation
section. Refer to Table 2-9 for the current
range for the 3-Step and 5-Step CCRs.
Check relays, wiring and insulation.
Replace contacts that are excessively burned
or pitted.
Operate the local control switch to check for
proper operation of relays and contactors.
Make sure input and output connections are
tight and that no damaged wires or damaged
insulation exists.
Inspect housing for rust spots.
Clean and touch-up rust spots with paint.
Inspect lightning arrestor connections.
Tighten any loose connections. Replace
charred or burnt wiring or broken arrestors.
Perform a short-circuit test.
Refer to Short-Circuit Test in this section.
Perform an open-circuit test.
Refer to Open-Circuit Test in this section.
At installation and subsequent load changes
make sure that the output rms voltage times
the output true rms current does not exceed
the rated load on the nameplate of the
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