BENSHAW RediStart EXEXMVRMX3 Series, User Manual

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ATTENTION: Using other than factory recommended test equipment and instructions on the controls may result in
personal injury and damage or failure of equipment.
Maintenance Records: Keeping good maintenance records will be helpful in locating possible intermittent problems by pointing to a
particular area of recurring trouble within the system.
Vacuum Contactor: To remove either of the contactors, perform the following steps:
•
Ensure that the main disconnect is open and the grounding blades are seated.
•
Disconnect all power wire or bus going to the VACUUM contactor poles.
•
Remove the control wire harness from the contactor.
•
Undo the four mounting bolts and remove the contactor.
Replacement of the contactor is the reverse of the removal. Test the contactor before installing to ensure
proper operation. A contactor manual is provided with each starter and should be referred to when
disassembling and reassembling the contactor. If required contact Benshaw for a manual.
Vacuum Bottles: The contacts in a vacuum bottle can not be seen or examined directly. They rely on a vacuum to operate
properly and to interrupt current. Consult contactor manufacturers instruction manual included with the starter
for addition maintenance requirements.
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NOTE: High pot testing of vacuum bottles creates radiation. Personnel should be no closer than 10 feet
and behind a metal barrier. Keep test times to a minimum.
Power Pole: To remove a SCR assembly, perform the follow steps:
•
Ensure that the main disconnect is open and the grounding blades are seated.
•
Disconnect all power, bus and control wires, and fiber optic cables going to the assembly.
•
Remove the bolts holding the assembly to the shelf.
•
Carefully slide the assembly from the enclosure, using caution to avoid damage to the control wiring.
•
Once removed, contact Benshaw to have the phase serviced or exchanged.
The installation of the power pole is the opposite of the removal process. The bypass contactor in the package
is horsepower rated and can be used to operate the motor while the power pole is being serviced. If this is the
case, ensure that the power wire for the removed phase is completely removed from the unit and that the
control wiring is isolated and will not come into contact with any medium voltage to prevent damage to the
starter.
Fans: Physically testing the fans by rotating and observing the fans for noise or binding will indicate if any failure is
evident.
Interlocks:
Verify that interlocks functions as intended, and have not been forced, damaged or removed.
Barriers: Verify that all barriers are in place and securely fastened.
Disconnect Switch: Perform a visual inspection for evidence of damage such as overheating, and do a tightness check. Consult
disconnect switch manufacturers instruction manual included with the starter for addition maintenance
requirements.
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8 - TROUBLESHOOTING & MAINTENANCE