Rockwell Automation 500LG Lighting Contactor Instruction Manual - Manual (Page 15)

Installing Bulletin 500LC Lighting Contactors 15
Publication 500LC–IN001A–EN–P May 2005
The Bulletin 500LC Lighting Contactor
is energized. Proceed with care!
CAUTION
Trouble–Shooting
Problem Check Control Voltage Check Control Station, Wiring, Supply
500LC does not
close when control
station is closed.
Measure control voltage
between 500LC terminals
L and C.
If no voltage is present, check control
station contacts, control wiring, supply
fuses, and optional accessories.
500LC does not
open when control
station is closed.
Measure control voltage
between 500LC terminals
L and O.
If no voltage is present, check control
station contacts, control wiring, supply
fuses, and optional accessories.
500LC tries to close
or open, but cannot.
Measure at least 90% control
voltage (nameplate coil
voltage) between 500LC
terminals L and C, or L and O.
If voltage is low, check control wire size
and line run distance; see Table D on page
4. If a transformer is used in the control
line, make sure it can handle the VA
burden required; see Table E on page 4.
500LC closes and
opens repeatedly.
—
Check control station for overlapping
contacts, and correct. Control stations
cannot call on 500LC to close and open at
the same time.
500LC closes or
opens very quickly
with excessive
noise.
Measure no more than 110%
control voltage (nameplate
coil voltage) between 500LC
terminals L and C, or L and O.
If voltage is high, change control supply
or change Bulletin 500LC Lighting
Contactor.
Manual Operation
A #8–32 screw 1–½ in. long can be used to manually operate the
500LC. One is supplied in all replacement parts kits requiring
manual operation. The screw should be used for maintenance
purposes only. Remove the screw after maintenance.
Do not manually operate the
Bulletin 500LC Lighting Contactor
until all power and control circuits
are disconnected.
CAUTION
Open circuit breakers, then use a voltmeter to verify no voltage is
present at the 500LC at both control and line terminal screws.
Insert the operating screw into the center of the coil and carefully
turn it clockwise until the threads engage the cam/core.
Pull the screw outward to open the 500LC contacts; push it in to
close the contacts. Observe the buttons in the contact block
(buttons out means contacts open).