Temperature sensing – Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) User Manual
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Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Chapter 3 Component Definition and Maintenance
Temperature Sensing
Thermal sensors are available on one heatsink in the rectifier and one heatsink in
the inverter. The thermal sensors are mounted on the heatsink with the
temperature feedback board.
1. Ensure there is no power to the equipment.
2. To replace a thermal sensor, refer to
General Precautions on page 12
regarding electrostatic discharge.
3. Remove the heatsink with the thermal sensor from the PowerCage.
).
4. Remove the device (SGCT or SCR) from the heatsink with the thermal
).
5. Disconnect the fiber optic cable to the temperature feedback board.
6. Remove two M8 screws holding the heatsink in place.
7. Remove the heatsink with the temperature feedback board from the
PowerCage.
8. Disconnect the plug connecting the thermal sensor and circuit board.
9. Remove the screw attaching the thermal sensor to the heatsink.
10. Replace with the new thermal sensor and cable assembly.
11. Note the small voltage difference between the thermal sensor and its
heatsink. For proper function, mount the small insulating pad between the
thermal sensor and the heatsink, and the insulating bushing between the
thermal sensor mounting screw and the thermal sensor (see
).
12. Reverse the removal order to replace the heatsink with the new thermal
sensor.
Uniform Clamping Pressure on page 53
to clamp the
heatsinks to a uniform pressure.
ATTENTION: To prevent electrical shock, disconnect the main power
before working on the drive. Verify that all circuits are voltage-free using
a hot stick or appropriate voltage-measuring device. Failure to do so may
result in injury or death.