Kohler — Voltage Reconnection Procedure (without Selector Switch)
Installation · Generator set / 12-lead alternator
From a Kohler operator's manual covering: 125REZGT, 30--125REZGT, 30REZG, 30REZGT, 50REZG, 70REZGT. Check it applies to your exact model before use.
Applies to: Kohler 125REZGT, Kohler 30REZG, Kohler 30REZGT, Kohler 50REZG, Kohler 70REZGT
Before you start
- Hazardous voltage. Disconnect all power sources before opening the enclosure.
Procedure
- Press the generator set master control OFF/RESET button.
- Open the main line circuit breaker.
- Navigate to Generator Info, then Configuration, then Generator Config menu.
- Set System Voltage L--L to the desired voltage (208 V, 240 V, or 480 V).
- Set System Phase to Three Phase or Single Phase.
- Verify settings match the desired voltage/frequency/phase.
- Disconnect the engine starting battery, negative lead first; disconnect battery charger power.
- Use the reconnection diagram to route leads through current transformers and reconnect.
- Make load connections and a ground connection per NEC guidelines.
- Replace all electrical guards, barriers, and covers.
- Reconnect the battery, negative lead last; reconnect battery charger power.
- Press RUN to start and check voltages.
- Press OFF/RESET to stop.
- Close the main line circuit breaker and any downstream circuit breakers.
Tools required
- User-supplied load lug wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Position current transformers CT1, CT2, and CT3 with the dot or HI side CT marking toward the generator set.
Full service-parts list: Kohler 125REZGT →, Kohler 30REZG →, Kohler 30REZGT →, Kohler 50REZG →, Kohler 70REZGT →
Source: Kohler operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.