Frequency protection, including overfrequency, underfrequency and frequency rate-of-change protection,
is offered in IEDs with standard configurations H and J.
The IED also incorporates optional three-pole multi-shot auto-reclose functions for overhead line feeders.
Enhanced with optional hardware and software,the IED also features three light detection channels
for arc fault protection of the circuit breaker, busbar and cable compartment of metalenclosed indoor switchgear.
The arc-fault protection sensor interface is available on the optional communication module.
Fast tripping increases staff safety and security and limits material damage in an arc fault situation.

Event recording
All events are stored with a resolution of 1 ms in the central unit and in the BUs.
System, protection and test events can be generated.
Protection events refer to the protected busbar and include the changes in the disconnector and breaker positions,
trips, etc. Test events are recorded during testing with the test signal generator.
System events describe the diagnostic and fault messages of the NBP system as a whole.
Product features
Motor protection with voltage- and frequency-based protection and measurement functionality
Motor protection both during motor start-up and normal run, with protection and fault clearance in abnormal situations as well
Optional arc protection and high-speed outputs
Supports IEC 61850 Editions 1 and 2, including HSR and PRP, GOOSE messaging and IEC 61850-9-2 LE for less wiring and supervised communication
IEEE 1588 V2 for high-accuracy time synchronization and maximum benefit of substation-level Ethernet communication
Supports Modbus, DNP3 and IEC 60870-5-103 communication protocols
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