Product Manual

5. Transfer Switch Service 3-2016

WARNING

If the cabinet must be opened for any reason, disconnect AC power to the automatic transfer

switch. If the instructions require otherwise, use extreme caution due to the danger of shock

hazard.

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. Remove the negative (-) cable(s) first to reduce the risk of arcing.

WARNING

Batteries emit hydrogen, a highly explosive gas. Thoroughly ventilate the battery compartment

before removing battery cables. Disconnect the starting battery cables before performing

service. Remove the negative (-) cable(s) first to reduce the risk of arcing.

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). The selector switch is

located on the generator set control panel.

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.

c. Disconnect the generator set starting battery negative (-) cable. Disconnect the negative (-)

lead first.

d. Remove all AC power to the automatic transfer switch.

5.3.2 Transfer Switch Assembly Removal

1. RA 100A/200A transfer switch assembly removal only:

a. Remove the applicable door panel(s):

• Non-service entrance models only: Remove the transfer switch cabinet door panel.

• Service entrance models only: Remove the outer and inner door panels.

b. Remove all control and power wiring from the switch terminals.

c. Loosen and remove the switch assembly:

• Loosen and remove the four screws, nuts, and washers that secure the switch panel and

switch to the rear wall of the cabinet.

• Loosen the six 1/4-20 bolts securing the mechanical lugs.