Microcomputer-based Integrated Protection

Typical Configuration

Function Name

Line

Capacitor

Motor

Plant Transformer

Analog Input

WGB-55

WGB-55C

Ua, Ub, Uc, Ia, Ib, Ic, 3I0, IX

Two-Stage Current Protection

√

√

√

√

Overcurrent Inverse-Time Protection

√

√

Negative Sequence Current Protection

√

Overload Protection

√

√

√

Three-Phase Single Shot Reclosing

√

Post-Reclosing Acceleration Protection

√

Overvoltage Protection

√

√

Undervoltage Protection

√

√

√

√

Zero-Sequence Protection

√

√

√

√

Definite-Time IX Current Protection

√

Inverse-Time IX Current Protection

√

Unbalanced IX Current Protection

√

Underfrequency Load Shedding

√

Excessive Starting Time

√

Overheat Protection

√

Control Circuit Anomaly Alarm

√

√

√

√

Spring Not Charged Alarm

√

√

√

√

TV Wire Break Detection

√

√

√

√

Heavy Gas Protection

√

Light Gas Protection

√

Overtemperature Protection

√

High Temperature Protection

√

Teleindication & Telecontrol Function

√

√

√

√

Telemetering

√

√

√

√