Rockwell Automation 1560E SMC Flex Smart Motor Controller - Manual (Page 79)

Commissioning Procedures 3-11
1560E-UM050B-EN-P - June 2013
Resistance Checks
To ensure that resistors and connections have not been damaged during
shipment and installation, the following resistance tests should be performed
before energizing the starter.
1. Remove all power from the equipment.
Verify that all circuits are voltage free using a hot stick
or appropriate voltage measuring device. Severe injury
or death can result from electrical shock, burn, or
unintended actuation of controlled equipment.
2. Measure DC resistance per the following chart:
Table 3.A – Power Circuit Resistance Measurements
Location of Probes 1000 V 1300 V 1500 V 2300 V 3300 V 4160 V 5500 V 6900 V
Cathode to Cathode (KOhms) Ê – – – – 22-30 23-31 21-29 24-32
Cathode to Cathode (KOhms) Ë 17-23 19-25 20-27 21-29 40-53 43-57 60-80 w 64-84 Ì
Cathode to Gate (Ohms) 10-40 10-40 10-40 10-40 10-40 10-40 10-40 10-40
Ê Measured between terminals “Cathode” on SPGD Boards, upper two or bottom two within a phase.
Ë Measured between terminals “Cathode” on SPGD Boards, top to bottom within a phase.
Ì
Measured between line and load terminals within a phase.
3. If abnormal readings are obtained, refer to Power Circuit Trouble-
shooting on page 9-12.
Voltage Sensing Module
The voltage-sensing module consists of a voltage sensing board and
mounting plate (refer to Figure 9.2). The voltage sensing board has six
independent channels which convert voltages up to 10800 V (7.2 kV @
1.5 pu) down to low voltage levels which can be used by the SMC-Flex
control logic.
Table 3.B shows the input voltage ranges for each of the input terminals
on the voltage-sensing module. This module has been designed to operate
at a nominal input voltage of up to 7200 V with a continuous 40%
overvoltage. The output voltages are scaled to provide close to 10 V peak
for a 140% input voltage at the high end of each of the voltage ranges.
Each of the channels has four taps to provide a range of input voltages, and
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)
A T T E N T I O N A T T E N T I O N