
P50 Agile P153
6 Protection Functions
P153/EN M/B
6-13
time. If the fault current has not been interrupted following a set time delay from circuit breaker trip
initiation, the CBF protection will operate, whereby the upstream circuit breakers are back-tripped to
ensure that the fault is isolated.
CBF operation can also reset all start output contacts, ensuring that any blocks asserted on upstream
protection are removed.
2.8.1
Circuit Breaker Fail Implementation
Circuit Breaker Failure Protection is implemented in the CB FAIL column of the relevant settings
group.
The circuit breaker failure protection incorporates
CB Fail Timer
. For any protection trip, the
CB Fail
Timer
is started, and normally reset when the circuit breaker opens to isolate the fault. If breaker
opening is not detected, the CB Fail Timer times out and close an output contact assigned to breaker
fail (using the I/O assignment feature). This contact is used to back-trip upstream switchgear,
generally tripping all infeeds connected to the same busbar section.
2.8.2
Circuit Breaker Fail Logic
Figure 6: CB Fail Logic
CBF elements
CB Fail Timer
can be configured to operate for trips triggered by protection elements
within the device or via an external protection trip. The latter is achieved by allocating one of the opto-
isolated inputs to CBF Init signal using the I/O Mask feature.
It is possible to reset the CBF from a breaker open indication from a protection reset. In these cases
resetting is only allowed provided the undercurrent elements have also been reset. The resetting
options are summarised in the following table:
CBF function Reset options
Description
I<
CBF function will reset when the phase currents and earth current is less than
set current
Содержание Agile P153
Страница 3: ...P50 Agile P153 1 Introduction P153 EN M B 1 1 INTRODUCTION CHAPTER 1 ...
Страница 4: ...1 Introduction P50 Agile P153 1 2 P153 EN M B ...
Страница 10: ...1 Introduction P50 Agile P153 1 8 P153 EN M B ...
Страница 11: ...P50 Agile P153 2 Safety Information P153 EN M A 2 1 SAFETY INFORMATION CHAPTER 2 ...
Страница 22: ...Chapter 2 Safety Information P50 Agile P153 2 12 P153 EN M A ...
Страница 23: ...P50 Agile P153 3 Hardware Design P153 EN M B 3 1 HARDWARE DESIGN CHAPTER 3 ...
Страница 24: ...3 Hardware Design P50 Agile P153 3 2 P153 EN M B ...
Страница 32: ...3 Hardware Design P50 Agile P153 3 10 P153 EN M B ...
Страница 33: ...P50 Agile P153 4 Front Panel P153 EN M B 4 1 FRONT PANEL CHAPTER 4 ...
Страница 34: ...4 Front Panel P50 Agile P153 4 2 P153 EN M B ...
Страница 39: ...P50 Agile P153 5 Configuration P153 EN M B 5 1 CONFIGURATION CHAPTER 5 ...
Страница 40: ...P50 Agile P153 5 Configuration P153 EN M B 5 2 ...
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Страница 151: ...P50 Agile P153 6 Protection Functions P153 EN M B 6 1 PROTECTION FUNCTIONS CHAPTER 6 ...
Страница 152: ...6 Protection Functions P50 Agile P153 6 2 P153 EN M B ...
Страница 167: ...P50 Agile P153 7 Protection Parameter Settings P153 EN M B 7 1 PROTECTION PARAMETER SETTINGS CHAPTER 7 ...
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Страница 189: ...P50 Agile P153 8 Monitoring Control P153 EN M B 8 1 MONITORING CONTROL CHAPTER 8 ...
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Страница 207: ...P50 Agile P153 9 SCADA Communications P153 EN M B 9 1 SCADA COMMUNICATIONS CHAPTER 9 ...
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Страница 220: ...12 SCADA Communications P50 Agile P153 9 14 P153 EN M B ...
Страница 221: ...P50 Agile P153 10 Installation P153 EN M B 10 1 INSTALLATION CHAPTER 10 ...
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Страница 233: ...P50 Agile P153 13 Commissioning Instructions P153 EN M B 13 1 COMMISSIONING INSTRUCTIONS CHAPTER 11 ...
Страница 234: ...13 Commissioning Instructions P50 Agile P153 13 2 P153 EN M B ...
Страница 241: ...P50 Agile P153 12 Maintenance and Troubleshooting P153 EN M B 12 1 MAINTENANCE AND TROUBLESHOOTING CHAPTER 12 ...
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Страница 251: ...P50 Agile P153 13 Technical Specifications P153 EN M B 13 1 TECHNICAL SPECIFICATIONS CHAPTER 13 ...
Страница 252: ...13 Technical Specifications P50 Agile P153 13 2 P153 EN M B ...
Страница 263: ...P50 Agile P153 14 Wiring Diagrams P153 EN M B 14 1 WIRING DIAGRAMS CHAPTER 14 ...
Страница 264: ...14 Wiring Diagrams P50 Agile P153 14 2 P153 EN M B ...
Страница 266: ...14 Wiring Diagrams P50 Agile P153 14 4 P153 EN M B 2 WIRING DIAGRAM Figure 1 P153 wiring diagram ...
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