Toshiba GR200 Series Instruction Manual page 286

Miscellaneous functions
2.15.3
Blocking UV operation
(i)
Blocking the UV function may be required when a failure in the voltage transformer occurs.
In this case, the user shall set Block for scheme switch [UV1-VTFBlk]. Non (as a default) is set
for scheme switch [UV1-VTFBlk] in order that the UV function is not blocked by the failure.
UV trip signal
(ii)
The UV1 element issues a trip signal for the trip circuit (TRC†) when Trip is set for scheme
switch [UV1-UseFor] as the normal tripping. However, when an alarm signal in place of the
trip signal is required, the user can set Alarm for the scheme switch [UV1-UseFor].
†Note: For more information about tripping, see Chapter
Operation of UV element
(iii)
The user should set On for scheme switch [UV1-EN] for the operation of the UV1 element.
Otherwise, set Off for the scheme switch if the UV1 element is not required to operate.
Under voltage test
(iv)
Setting [UV-Test] =On is not to operate UV blocking element (UVBLK) for testing.
Scheme logic
2.15.4
Figure 2.15-4 show the logic of the UV function. PLC connection points "UV*_BLOCK" are
provided for blocking the operation of the UV elements. Other PLC connection points
"CB_*PH_OPEN" are provided so that the UV function can determine its operation using the
open/closed information of a circuit breaker (CB). For testing, the UV1-PU element is provided;
it generates a pick-up signal when the entering voltage is below the threshold anytime. For
example, in the IDMT characteristic, using both PLC monitoring points "8000011B20" and
"8000011B24" can facilitate to measure the pickup time after the deficiency.
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6F2S1915 (0.46)
Relay application: Trip circuit
GRZ200 (Soft 031 & 032)
.