Electronic Speed Switch (3N7874 and 3N9595)
Usage:
The normal overspeed setting for the electronic speed switch is 18% above full load speed.
For setting and checking, install a temporary jumper wire between terminal 1 (VERIFY) and terminal 2 (SHLD). This makes the electronic overspeed switch activate. Later switches have a push button to check the setting.
Caterpillar Information System:
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3304 & 3306 INDUSTRIAL & MARINE ENGINES Overspeed Contactor Group
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