Allen-Bradley E300 User Manual

Rockwell Automation Publication 193-UM015E-EN-P - October 2015 63
Installation and Wiring Chapter 2
Table 20 - CT Primary (Parameter 263)
Table 21 - CT Secondary (Parameter 264)
Provide one CT for each motor phase and connect the CT’s secondary leads to
the appropriate sensing module power terminals. Selected CTs must provide the
required volt amperes to the secondary load, which includes the E300 Sensing
Module burden of 0.1VA at the rated secondary current and the wiring burden.
The CT must be rated for Protective Relaying to accommodate the high inrush
currents associated with motor startup and must be accurate to within ≤±2%
over its normal operating range. Typical CT ratings include the following:
• ANSI USA
• CSA (Canada)
• IEC (Europe)
• Class C5 BO.1
• Class 10L5
• 5VA Class SP10
CT Primary (Parameter 263)
Default Value 5
Minimum Value 1
Maximum Value 65535
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 1
Units Amps
CT Secondary (Parameter 264)
Default Value 5
Minimum Value 1
Maximum Value 65535
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 1
Units Amps
ATTENTION: Improper configuration of the CT Ratio parameters can make the
E300 relay report inaccurate motor operational data and possible motor
damage.
IMPORTANT
The E300 relay trip on a configuration fault when the FLA setting is outside of
the legal range of the selected CT Ratio settings. The TRIP/WARN LED status
indicator flashes red 3-long, 8-short blinking pattern.

Allen-Bradley E300 Specifications

General

Brand	Allen-Bradley
Model	E300
Category	Other
Language	English