ABB dual power conversion switch

Overexcitation protection (24): Based on U/f ratio monitoring, two-stage alarm/trip to prevent magnetic core saturation.

Auxiliary protection

Thermal overload protection (49T): Dual time constant model, real-time monitoring of winding temperature, supporting RTD input (such as Pt100).

Circuit breaker failure protection (62BF): When detecting refusal to move, quickly trip adjacent circuit breakers with a response time of less than 20ms.

Measurement and monitoring functions

real-time

Support three-phase current/voltage, sequence component, power, frequency, and harmonic analysis (suppression -50dB), with a measurement accuracy of ± 0.5%.

RTD/Analog Module: 8 inputs (6 RTDs+2 mA), used for oil temperature and gear monitoring; 4-channel 0-20mA output, compatible with PLC system.

Fault recording and recording

Disturbance Recorder (MEDREC16): 16 analog signals+16 switch signals, supporting COMTRADE format, with a maximum recording time of 23.3 seconds.

Event and fault records: 512 time stamped events, 32 fault records (including peak/phase angle), non-volatile storage.

Status monitoring

Circuit breaker monitoring: monitoring spring energy storage, SF pressure, travel time, and supporting life prediction.

Circuit monitoring: Continuous monitoring of the tripping circuit, detecting disconnection or poor contact, with a response time of less than 40ms.

Control and Communication

Local and remote control

The front panel supports circuit breaker opening and closing, isolation switch position indication, and can be configured with dynamic single line diagram (HMI).

Remote control supports GOOSE horizontal communication to achieve protection interlocking and status synchronization.

Communication interface and protocol

Serial interface: RS-232/485, supports Modbus RTU/ASCII, DNP 3.0, IEC 60870-5-103.

Ethernet interface: 100Base TX/FX, supports SPA, LON bus, and IEC 61850-8-1 GOOSE (transmission time<3ms).

Time synchronization: SNTP, IRIG-B, with a time scale accuracy of 1ms, ensuring consistency of events across the entire network.