Transfer Switch - Generac Power Systems MDG25IF4 Owner's Manual

Figure 3-8. Main Circuit Breaker
Reasons the main circuit breaker may trip:
•
Overload of generator circuits to connection lugs or
optional cam lock receptacles.
•
Door covering connection lugs or optional cam lock
receptacles is open.
•
Unit is in idle.
•
Emergency stop switch is active.
•
Phase switch door is open.
Verify any problems that cause the main circuit breaker to
trip are corrected before returning the switch to ON (I).
NOTE: The main circuit breaker only interrupts power to
the connection lugs and the optional cam lock
receptacles. The customer convenience receptacles
have power even if the main circuit breaker is OFF (O).
Use the individual circuit breakers located near each
receptacle to disconnect power to these receptacles.
Owner's Manual for Mobile Generator

Transfer Switch

Loss of life. Property damage. Installation must
always comply with applicable codes, standards, laws
and regulations. Failure to do so will result in death
or serious injury.
Electrical backfeed. Use only approved switchgear to
010493
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure to
follow proper installation requirements could result in death,
serious injury, and equipment or property damage.
Electric shock. Phase rotation must be compatible.
Incompatible phase rotation could result in death,
serious injury, or equipment damage.
The installation should be in compliance with the National
Electrical Code (NEC), state, and local regulations.
Before any connections are attempted, verify the main
circuit breaker and the control power switch are in the
OFF (O) position and that the negative (-) battery cable
has been disconnected from the battery.
Installation of such devices must be performed by
following all directions supplied by the manufacturer of
the switch. If attaching the unit to a power supply
normally serviced by a utility company, notify the utility
company and check state and local regulations.
Familiarize yourself with all instructions and warning
labels supplied with the switch.
When the unit is used as a standby power supply, it must
be equipped with a transfer switch that isolates it from the
utility's distribution system. A transfer switch is designed
to transfer electrical loads from the normal power source
(utility) to the emergency power source (generator) when
normal voltage falls below a prescribed level. The
transfer switch automatically returns the load back to the
normal source when power is restored back to operating
levels.
Operation
DANGER
(000190)
DANGER
WARNING
(000155a)
WARNING
(000226b)
(000237)
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