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6 F 2 S 0 8 2 8
2.9.2 Setting
The setting elements necessary for the breaker failure protection and their setting ranges are as
follows:
Element Range
Step
Default
Remarks
CBF
0.5 – 10.0 A
0.1 A
2.5 A
Overcurrent setting
(0.10 - 2.00 A)(*)
(0.01 A)
(0.50 A)
TRTC
0.00 – 300.00 s
0.01 s
0.50 s
Retrip time setting
TBTC
0.00 – 300.00 s
0.01 s
1.00 s
Back trip time setting
[RTC]
Off / DIR / OC
Off
Retrip control
[BTC]
Off / On
Off
Back trip control
(*) Current values shown in the parentheses are in the case of 1 A rating. Other
current values are in the case of 5 A rating.
The overcurrent element CBF checks that the circuit breaker has opened and that the current has
disappeared. Therefore, since it is allowed to respond to load current, it can be set to 10 to 200% of
the rated current.
The settings of TRTC and TBTC are determined by the opening time of the original circuit breaker
(Tcb in Figure 2.9.1.2) and the reset time of the overcurrent element (Toc in Figure 2.9.1.2). The
timer setting example when using retrip can be obtained as follows.
Setting of TRTC = Breaker opening time + CBF reset time + Margin
= 40ms + 10ms + 20ms
= 70ms
Setting of TBTC = TRTC + Output relay operating time + Breaker opening time +
CBF reset time + Margin
= 70ms + 10ms + 40ms + 10ms + 10ms
= 140ms
If retrip is not used, the setting of the TBTC can be the same as the setting of the TRTC.
The actual tripping time after BFP start will be added the time (approx. 15 to 20ms) consumed by
motion of binary input and output to above timer’s settings. (Response time of binary inputs: less
than 8ms, Operating time of binary outputs: less than 10ms)
Содержание GRL150-100 Series
Страница 149: ... 148 6 F 2 S 0 8 2 8 ...
Страница 150: ... 149 6 F 2 S 0 8 2 8 Appendix A Programmable Reset Characteristics and Implementation of Thermal Model to IEC60255 8 ...
Страница 154: ... 153 6 F 2 S 0 8 2 8 Appendix B Signal List ...
Страница 180: ... 179 6 F 2 S 0 8 2 8 Appendix C Binary Output Default Setting List ...
Страница 182: ... 181 6 F 2 S 0 8 2 8 Appendix D Details of Relay Menu ...
Страница 195: ... 194 6 F 2 S 0 8 2 8 ...
Страница 196: ... 195 6 F 2 S 0 8 2 8 Appendix E Case Outline ...
Страница 199: ... 198 6 F 2 S 0 8 2 8 ...
Страница 200: ... 199 6 F 2 S 0 8 2 8 Appendix F Typical External Connections ...
Страница 223: ... 222 6 F 2 S 0 8 2 8 ...
Страница 228: ... 227 6 F 2 S 0 8 2 8 Appendix I Return Repair Form ...
Страница 232: ... 231 6 F 2 S 0 8 2 8 Appendix J Technical Data ...
Страница 238: ... 237 6 F 2 S 0 8 2 8 Appendix K Symbols Used in Scheme Logic ...
Страница 241: ... 240 6 F 2 S 0 8 2 8 ...
Страница 242: ... 241 6 F 2 S 0 8 2 8 Appendix L Inverse Time Characteristics ...
Страница 248: ... 247 6 F 2 S 0 8 2 8 Appendix M IEC60870 5 103 Interoperability ...
Страница 260: ... 259 6 F 2 S 0 8 2 8 Appendix N Resistor Box Option ...
Страница 263: ... 262 6 F 2 S 0 8 2 8 ...
Страница 264: ... 263 6 F 2 S 0 8 2 8 Appendix O Ordering ...
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