Rockwell Automation Publication 193-UM015D-EN-P - February 2015 51
Installation and Wiring Chapter 2
Voltage Mode
Voltage Mode (Parameter 252) determines the method for how voltage is
monitored E300 Electronic Overload Relay. Select the connection type for the
appropriate power system.
Table 16 - Voltage Mode (Parameter 352)
Potential (Voltage) Transformer Ratio
The E300 Electronic Overload Relay sensing module catalog number
193-ESM-VIG-30A-CT can be used with step down potential (voltage)
transformers. PT Primary (Parameter 353) and PT Secondary (Parameter 354)
allows you to identify the turns ratio of the step down potential (voltage)
transformers in use. The E300 Electronic Overload Relay will automatically
adjust the measured voltage based on these two configuration parameters. Use
the primary voltage for your voltage protection settings.
Table 17 - PT Primary (Parameter 353)
Table 18 - PT Secondary (Parameter 354)
Default Value 0 = Delta direct or with PTs
Range
0 = Delta direct or with PTs
1 = Wye direct or with PTs
2 = Delta with Delta to Wye PTs
3 = Wye with Delta to Wye PTs
4 = Delta with Wye to Delta PTs
5 = Wye with Wye to Delta PTs
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units
Default Value 480
Minimum Value 1
Maximum Value 65535
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 1
Units Amps
Default Value 480
Minimum Value 165535
Maximum Value
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 1
Units Amps
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