Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 58)

58 Rockwell Automation Publication 7760-UM001D-EN-P - October 2014
Chapter 2 Commissioning Procedure
Control Function Tests Ensure that the following are carried out before the control function test
1. The Medium Voltage to the Incoming Line Unit is locked and tagged out.
2. The earthing switch on the Bypass Unit is closed.
3. The SCR Power Trucks are racked in and mechanically bolted in position.
4. The Power connections to SCR Power Truck are made and torqued to
14 N• m (11 lb•ft). The fibre optic connections on the fibre optic board
are plugged in and the current loop wires are terminated.
5. The Soft Starter Unit doors are closed in the required sequence as per
interlock sequence.
6. The connector for control wiring of the Bypass and Main Circuit breakers
or contactors are plugged in.
7. The Bypass and Main circuit breakers or contactors are racked to the ‘Test’
position for the control function test.
The following control function test shall be carried out:
8. Apply rated control voltage to the control circuit.
9. Using the control schematic, apply control signals to cause relays, circuit
breakers or contactors to energize to verify operation.
10. Remove any jumpers used in the test and restore all circuits to normal
when finished.
Voltage Sensing Module The voltage-sensing module consists of a voltage sensing board and mounting
plate (refer to
Figure 44 ). The voltage sensing board has six independent
channels, with different sized resistors base on voltage range, which convert
system voltages down to low voltage levels which can be used by the SMC Flex
control logic.
Table 6 shows the input voltage ranges for the voltage-sensing module. The
output voltages are scaled to provide close to 10V peak for a 140% input voltage
at the high end of each of the voltage ranges. Software will be used to scale the
output to show the correct value on the SMC Flex front panel display.
(See Parameter 106 – MV Ratio in
Table 50 on page 131 )
Table 6 - Input Voltage Ranges
The MV ratios shown above are nominal values and may be fine tuned to achieve
better accuracy on the display of the SMC Flex control module. While running
the motor in bypass mode, compare the voltage displayed on the control module
to a known accurate meter connected to the same source voltage as the motor the
MV SMC Flex is controlling. Parameter 106, MV Ratio, may be changed up or
Module Rated Voltage Voltage Range MV Ratio
12,000 10,000...12,000 126
14,400 12,001...15,000 97