Toshiba GRZ100-211B, Instruction Manual

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6 F 2 S 0 8 3 4
The undervoltage element for weak infeed tripping (UVLS, UVLG) is set to 70% of the
rated voltage.
Element Setting
UVLS 77V
UVLG 45V
3.9 Time setting
a. Time delay setting for zone distance protection
b. Coordination time setting for protection signaling channel
This time setting is required only for the Blocking scheme. The time should be set larger
than the time delay of protection signaling equipment (PSE) including propagation time of
PLC (Power Line Carrier) or other communication link. The time setting should include an
operation margin of 5ms.
Time setting = Time delay of PSE + Margin
= 12ms + 5ms
= 17ms
c. Time setting of earth fault element EF (TEF)
This time setting is for time delay of the EF element. If it is set to 3s, the trip/alarm contact
will close 3s after detecting an unbalance current (residual current) such as a CT open
circuit fault. In addition to CT open circuit faults, this element can detect a broken
conductor condition.
d. Time setting of directional earth fault relay (TDEFB)
Set the time delay for the directional earth fault element for back-up.
Element Setting (s)
TZ1S 0.00
TZ2S 0.30
TZ3S 0.40
TZ1G 0.00
TZ2G 0.30
TZ3G 0.40
TCHD 0.017
TEF 3.00
TDEFB 3.00
3.10 Autoreclose setting
a. Dead timer reset timing
b. Dead line timer
The SPAR and TPAR timer are provided to present the deionized time of the line. The
SPAR element is initiated simultaneously by the reclose initiation for single-pole
autoreclose dead time. TPAR is for three-pole autoreclose dead time.
c. Reclaim timer
The reclosing command signal is blocked during adjusted time set by reclaim timer, after
the breaker is closed manually or automatically.
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