Katolight — Constant Excitation Test (12V Battery Test)
Testing & diagnosis · Generator excitation system
From a Katolight service manual covering: 280 -- 430 Frame, 280 frame, 360 frame, 430 frame. Check it applies to your exact model before use.
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Before you start
- Caution should be taken to ensure the battery is not exposed to any potential arcing.
Procedure
- Shutdown the generator set and connect a voltmeter on the generator terminals.
- Disconnect the regulator's F+ (F1) and F- (F2) leads and connect them to a 12V battery, avoiding potential arcing.
- With no load on the generator (main breaker open), run the generator at rated speed.
- Measure the generator's terminal voltage and compare with values recorded during installation.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- With 12 volts dc applied to the exciter field at rated speed, terminal voltage will be near rated value
Source: Katolight service 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.