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O
PERATING THE
4
6
Pre-Operation Checks
Note: Completely disconnect the Converter before point-to-point checking with a buzzer, or
590 Series DC Digital Converter
Initial checks before applying power:
• Mains power supply voltage is correct.
• Auxiliary power supply voltage is correct.
• Motor is of correct armature voltage and current rating.
• Check all external wiring circuits - power, control, motor and earth connections.
when checking insulation with a Meggar.
• Check for damage to equipment.
• Check for loose ends, clippings, drilling swarf etc. lodged in the Converter and system.
• If possible check that the motor can be turned freely, and that any cooling fans are intact and
free from obstruction.
Ensure the safety of the complete system before the Converter is energised:
• Ensure that rotation of the motor in either direction will not cause damage.
• Ensure that nobody else is working on another part of the system which will be affected by
powering up.
• Ensure that other equipment will not be adversely affected by powering up.
Prepare to energise the Converter and system as follows:
• Remove the main external HRC fuses to prevent the main 3-phase and single phase auxiliary
supply from being connected.
• Disconnect the load from the motor shaft, if possible.
• If any of the Converter's control terminals are not being used, check whether these unused
terminals need to be tied high or low. Refer to Chapter 11: "Technical Specifications"-
Control Terminals.
• If there is any doubt about the integrity of a particular installation, insert a high wattage
resistor, i.e. fire elements, in series with the motor armature.
• Check external run contacts are open.
• Check external speed setpoints are all zero.
Operating the Converter
C
ONVERTER
4-1
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