TS 910 TRANSFER SWITCH
PM140 REV 2 14/01/23 12 Thomson Power Systems
5.2.2.1 TURN OFF GEN STARTING CONTROL: At the generator set, turn it’s automatic starting
control to OFF position to prevent generator set from automatically starting when the Utility
Service disconnect breaker is opened.
5.2.2.2 LOCK OPEN GENERATOR CIRCUIT BREAKER: At the generator set, OPEN its main
generator output power circuit breaker. Attach safety lockout padlock to the circuit breaker
to prevent unauthorized change in operating condition.
WARNING!
Failure to lock open the main generator output
circuit breaker may result in serious personal
injury or death due to electrical shock.
5.2.2.3 LOCK OPEN UTILTY SERVICE DISCONNECT BREAKER: At the transfer switch, OPEN
the Utility Service disconnect circuit breaker. Attach safety lockout padlock directly onto the
Service Disconnect Utility circuit breaker toggle hasp provided to prevent unauthorized
change in operating condition.
NOTE!
On NEMA 3R rated Transfer Switches, A door
locking Padlock hasp is also provided in cases
where the padlock does not fit behind the
NEMA 3R door when closed.
WARNING!
Failure to lock open the Utility Service
disconnect circuit breaker may result in serious
personal injury or death due to electrical shock.
DANGER!!!!
Arc Flash and Shock Hazard. Will cause severe injury or death.
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