5.2.1 CIRCUIT BREAKER OPEN LOGIC DIAGRAMV03390CB1 Open 3 phCB1 Open B phCB1 Open C phCB1 Open A ph11CB1Op1PCB1OpAnyCB1Op2/3P1³2CB2 Open 3 phCB2 Open B phCB2 Open C phCB2 Open A ph11CB2Op1PCB2OpAnyCB2Op2/3P1³2904905906903912913914911Figure 150: Circuit Breaker Open logic diagram (Module 3)5.3 CIRCUIT BREAKER IN SERVICE LOGICFor Autoreclose to proceed, a circuit breaker has to be in service when the Autoreclose is initiated. A circuit breakeris considered to be in service if it has been closed for more than the CB IS Time setting.For applications with fast-acting circuit breaker auxiliary switches, a time delay setting CB IS Memory Time isprovided. This is used to ensure correct operation if a delay between the circuit breaker tripping and recognition bythe protection, is expected.When an Autoreclose cycle starts, the “in service” signal for a circuit breaker stays set until the Autoreclose cyclefinishes.The circuit breaker “in service” signal resets if the circuit breaker opens, or if the corresponding Autoreclose inprogress (ARIP) signal resets.P446SV Chapter 11 - AutorecloseP446SV-TM-EN-1 291
