Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 47)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 47
Installation and Wiring Chapter 2
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 the user 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. Users will use the primary
voltage for their 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