Toshiba GR200 Series - (iii) Operation of UV element; (iv) Under voltage test; 2.24.4 Scheme logic

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 327 -
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 Relay application: Trip circuit .
(iii) Operation of UV element
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.
(iv) Under voltage test
Setting [UV-Test] =On is not to operate UV blocking element (UVBLK) for testing.
2.24.4 Scheme logic
Figure 2.24-4 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.