GE Industrial Solutions Entellisys 4.0 System Test Kit User Manual - Manual (Page 66)

Definition of terms 66
Phase or Phase Angle Phase angle rotation that can be set from test kit. Range of Phase angle is –360° to
+360°.
PL Phase Loss relay protection function
Post-Fault / Post-Fault
Level The period of time or the voltage/current condition following a fault.
PR Power Reversal relay protection function
Pre-Fault / Pre-Fault
Level The period of time and/or the voltage/current condition preceding a fault.
PT Rating Rating of Potential Transformer of the circuit breaker.
Rating Switch Rating switch value of the circuit breaker.
RMS Root Mean Square—calculation used to measure voltage or current.
Secondary Injection Current (and voltage) injection into the system through the CT (and PT) connections
of the EntelliGuard Messenger.
Shunt Trip One of two means to actuate the circuit breaker. Shunt trip is used to open the circuit
breaker when users manually open the circuit breaker from the HMI.
ST Short Time overcurrent protection function
Trip Test A test that causes the circuit breaker to trip
Trip Time Curve Trip time curve of the connected circuit breaker for different protection schemes.
UF Under frequency relay protection function
USB Universal Serial Bus
UV Undervoltage relay protection function
Table A-21 Definition of terms
Term Definition