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GWZC-9916 Bus differential protection relay
GWZC-9916 Bus differential protection relay
GWZC-9916 Bus differential protection relay

Applicable Scope :GWZC-9916 Bus Differential Protection Relay supports a maximum of 24 branches for connected components. For neutral ungrounded systems, the capacity extends to 36 branches when protection connects to only two-phase CTs.

Product functions(ANSI):87 | 50BF | 50BF | 50 | 60 | 60 | 60 | 50 | 27

Communication functions : IEC61850 | ​​IEC 60870-5-103 | MODBUS RTU | 3× Ethernet Ports | 3× RS-485

Other functions : Rapid and highly-sensitive dual slope percent differential protection, operating time of entire set below 15ms. 48 Samples/Cycle sampling frequency.

Product Introduction Technical Parameter Size

GWZC-9916 Bus Differential Protection Relay Product Introduction:

          GWZC-9916 Bus Differential Protection Relay Applicable for voltage levels up to 132kV, supporting various busbar configurations including single bus, sectionalized single bus, triple-section single bus, double bus, double bus with single section, and double bus with double sections.

          The GWZC-9916 Bus Differential Protection Relay supports a maximum of 24 branches for connected components. For neutral ungrounded systems, the capacity extends to 36 branches when protection connects to only two-phase CTs.

 

GWZC-9916 Bus Differential Protection Relay Product functions(ANSI)

1.Differential Protection (ANSI 87)
2.Breaker Failure Protection (ANSI 50BF)
3.Bus Coupler/Section Breaker Failure Protection (ANSI 50BF)
4.Bus Coupler/Section Dead Zone Protection (ANSI 50)
5.CT Open Circuit Blocking (High Threshold) (ANSI 60)
6.CT Open Circuit Alarm (Low Threshold) (ANSI 60)
7.PT Open Circuit Alarm (ANSI 60)
8.Bus Coupler/Section Charging Overcurrent Protection (ANSI 50)
9.Voltage Unblocking for Line Breaker Failure (ANSI 27)

Features of GWZC-9916 Bus Differential Protection Relay

1.Fast and highly sensitive Multi-Criteria Ratio Differential Protection with overall operation time below 15ms.
2.Sampling frequency achieves 48 points per cycle.
3.Variable-characteristic differential algorithm based on full-process transient saturation measurement delivers strong resistance to saturation.
4.Complete independence between protection elements and blocking elements ensures reliable blocking circuit.
5.CT ratio settable on-site according to actual transformation ratio.
6.Adaptive bus operation mode automatically corrects errors in disconnector auxiliary contacts.
7.Protection logic visualization and analysis capability.
8.Communication protocols comply with power industry standards: IEC 60870-5-103 or IEC 61850 (optional).
9.Adaptive reception for three GPS time synchronization modes: second-pulse, minute-pulse, and IRIG-B, with autonomous mode discrimination.

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