Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 44)

44 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 2 Installation and Wiring
Figure 33 - E300 DOL and Single-Phase Full Voltage Connections
External Line Current
Transformer Application Current Transformer Ratio
The following E300 Electronic Overload Relay sensing module catalog numbers
can be used with step down current transformers:
• 193-ESM-IG-30A-E3T
• 193-ESM-IG-30A-T
• 193-ESM-IG-30A-P
• 193-ESM-I-30A-E3T
• 193-ESM-I-30A-T
• 193-ESM-I-30A-P
• 193-ESM-VIG-30A-CT
CT Primary (Parameter 263) and CT Secondary (Parameter 264) allows the user
to identify the turns ratio of the step down current transformers in use. The E300
Electronic Overload Relay will automatically adjust the measured current based
on these two configuration parameters. Users will use the primary current for
their FLA settings.
Table 13 - CT Primary (Parameter 263)
L 1
2/T1 4/T2 6/T3
M
T1
Three-Phase Direct-On-Line Single-Phase Full-Voltage
T2
L 2
E300
L 1
2/T1 4/T2 6/T3
M
T1
T2
T3
S.C.P.D.
L 2 L 3
S.C.P.D.
E300
CT Primary (Parameter 263)
Default Value 5
Minimum Value 1
Maximum Value 65535