Product Manual

5. Transfer Switch Service 3-2016

FIGURE 31. RA 400A CIRCUIT BREAKER

5.7 Utility Sense Relay (K2) 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 set provides

emergency power, move the generator set 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.