Toshiba GR-200 Series Instruction Manual page 23

[FRQ] Frequency protection (Over frequency, under frequency, Δf)
FRQ detects frequency deviation and issue an alarm between actual frequency and nominal
frequency.
[FL] Single-end fault locator
When a fault is detected, the FL can determine distance between the IED and the fault point.
[ARC] Auto-re-close function
After tripping a circuit breaker (CB), the ARC can restore the service by closing the CB again.
[VCHK] Voltage check for auto-re-close function
The VCHK is used in corporation with the function of auto-re-close (ARC). It checks voltage
and frequency differences between a Bus-bar and Lines, and permits the ARC the operation.
[VTF] VT failure detection function
When a fault occurs in the secondary circuit of a voltage transformer (VT), voltage dependent
measuring elements may operate incorrectly. Thereby when the VTF detects a failure in the
VT, it blocks the voltage dependent relay elements.
[CTF] CT failure detection function
When a fault occurs in the secondary circuit of a current transformer (CT), current dependent
measuring elements may operate incorrectly. Thereby when the CTF detects a failure in the
CT, it blocks the current dependent relay elements.
[COMM] Common function
The COMMON provides common setting items in the IED.
[REVPOW] Reverse power protection
The REVPOW is used to save the motor from the damage by detecting the reverse power about
active power and reactive power.
[ATO] Automatic transfer operation
The ATO is to issue CB open and CB close commands automatically to change the lines for
power reception, when a fault has occurred at substitution.
[MOT] Motor protection
The MOT is to protect the motor from the damage depending on several motor statuses.
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6F2T0200 (0.15)
GRE200 (1,2)