The engine speed is determined by measuring the output frequency from a magnetic pickup mounted adjacent to the engine ring gear. With rising motor speed the starter cutout relay will operate at a set point. Should the engine go into over speed an internal self-locking relay can only be released by interrupting the supply to the PCB.
NOTE: The GM012 is one of a range of low cost PCB assemblies designed for OEMs to assemble their own control cubicles for use with automatic standby diesel generator sets and fire pumps etc.
OPTION : The over speed switch can be non latching (specify when ordering).
12 or 24V DC (specify when ordering).
Magnetic pickup sensing ring gear rotation. May be paralleled with governor.
Screwdriver adjusted potentiometers - factory preset if number of ring gear teeth and speed settings are defined (factory presets — 1000Hz, 3000Hz).
Two functions - starter cut out and over speed, each has a single C/O contact 8A resistance loading, 4A inductive.
Fibre glass PCB, clear varnish protection.
Gammatron | Power & Instrumentation Equipment
Gammatron manufactures and supplies commercial and industrial grade power & instrumentation products worldwide.