Manualshelf

Product Manual

ManualsBrandsCummins Power Generation ManualsAutomaticCummins RA-200-NSE - 200-Amp Outdoor Automatic Transfer Switch For RS/RX Generators (Aluminum)
51525354555657585960
5. Transfer Switch Service3-2016
55A046S594 (Issue 12) Copyright © 2016 Cummins Inc.
5.5 Control Relay (K1) Replacement Procedure
WARNING
The transfer switch presents a shock hazard that can cause severe personal injury or death.
Before beginning installation, remove all sources of AC power. If a generator provides
emergency power, move the generator operation selector switch to Stop, disconnect AC line
power, disconnect the battery charger from its AC power source, and disconnect the starting
battery (negative [-] lead first).
1. Remove all sources of power from the transfer switch in the following order.
a. Move the operation selector switch on the generator to Stop (Off).
CAUTION
Always disconnect a battery charger from its AC source before disconnecting the
battery cables. Otherwise, disconnecting the cables can result in voltage spikes high
enough to damage the DC control circuits.
b. If there is an external battery charger, disconnect the battery charger from its AC power source.
WARNING
Ignition of explosive battery gases can cause severe personal injury. Do not smoke or
cause any spark, arc, or flame while servicing batteries.
WARNING
Accidental starting of the generator can cause severe personal injury or death due to
electrocution or contact with moving parts. Disconnect the starting battery cables,
before performing service. Batteries emit hydrogen, a highly explosive gas.
Thoroughly ventilate the battery compartment before removing battery cables. Remove
the negative (-) cable (s) first to reduce the risk of arcing.
c. Disconnect the generator starting battery (negative [-] lead first).
WARNING
If the cabinet must be opened for any reason, remove AC power to the automatic
transfer switch. If the instructions require otherwise, use extreme caution due to the
danger of shock hazard.
d. Remove AC power to the automatic transfer switch.
2. Remove the transfer switch cabinet door panel.
3. Spread the relay clips apart and remove the relay(s) from the relay base(s).
4. Install the new relay(s) on the relay base(s), making sure the screw head on the bottom of the relay
matches up with the hole in the relay base.
5. Make sure the relay clips are securing the relay(s) to the base(s).
6. Restore power.