Operating the Converter 4-4
512C Series Converter
Basic Setting-Up Procedure
Caution
BEFORE ATTEMPTING TO CONNECT POWER
Controller
Check:-
• the Main power supply voltage is within the operating range of the controller.
• the Armature voltage and current ratings are compatible with controller supplied.
• the Field voltage and current ratings are suitable.
• All external wiring circuits are correct, i.e:-
Power connections
Control connections
Motor connections
Note: Completely disconnect the controller before point to point checking with a buzzer or when
checking insulation with a megger.
• For damage to equipment.
• For loose ends, clippings, drilling swarf etc., lodged in the drive or ancillary equipment.
Motor
• Inspect the motor, in particular the commutator for any extraneous matter. If an air supply is
available, it is recommended to blow over the commutator.
• Check the brushes are properly seated and that the brush spring tension is adequate.
• If possible check that the motor (and vent fan if fitted) can be turned freely by hand.
Preparation
Machine
Check:-
• That rotation of the motor in either direction will not cause damage.
• That nobody else is working on another part of the equipment that will be affected by
powering up.
• That other equipment will not be adversely affected by powering up.
Controller
• Prevent application of the main power supply by removal of the supply fuses.
• Disconnect the load from the motor shaft if possible.
• If there is any doubt as to the integrity of a particular installation, insert a high wattage
resistor (i.e. fire bar elements) in series with the motor armature.
• If it is possible to rotate the motor, and tachogenerator feedback is in use, check that forward
rotation results in positive tacho feedback, i.e. terminal 1 is positive with respect to terminal
8 or 11.
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