WCB-821C_Xuji Microcomputer Factory Transformer Protection Device

1. Overview

1.1 Scope of Application

The WCB-821C microcomputer factory transformer protection device (hereinafter referred to as the device) realizes the protection and measurement functions of parallel reactors in non directly grounded systems (neutral point ungrounded or grounded through arc suppression coils) or small resistance grounded systems, mainly used for the protection and measurement of parallel reactor intervals at voltage levels of 35V and below.

1.2 Protection configuration

The device protection configuration is detailed in Table 1-1.

Table 1-1 WCB-821C Device Protection Configuration

Function Classification Function Name Description

protection function

Ratio differential protection

Differential current interruption protection

Differential current over limit alarm

overcurrent protection

Inverse time overcurrent protection

Zero sequence overcurrent protection

Overload protection

Zero sequence overvoltage protection

non-electrical protection

Accessibility

TA anomaly detection

TV anomaly detection

Control circuit abnormal alarm is applicable to protection devices with operating circuits

Spring energy storage failure alarm

GPS pulse monitoring optional function

waveform recording

Measurement and control function

Remote signaling input acquisition, device remote signaling displacement, accident remote signaling

Normal circuit breaker remote control opening and closing

Analog telemetry and grounding line selection data transmission

1.3 Product Features

Xu Ji's independently owned "VLD" visualization tool has high software reliability.

Equipped with offline logic simulation function, it can achieve transparency in accident analysis.

The device adopts a fully enclosed chassis, with strict separation of strong and weak electricity, strong anti-interference ability, and comprehensive self inspection of hardware circuits.

Configure 2 Ethernet ports and support IEC61850 communication protocol.

The timing method supports SNTP timing, B-code timing, GPS pulse timing, and 1588 timing.

Complete event recording function, capable of storing the latest 80 event records, 100 action records, and recording 10 cycles of current and voltage reports.

 Friendly human-machine interface, fully Chinese Windows menu mode, clear structure, easy to use.

The protection function is fully configured and can be selected through configuration tools to meet the personalized needs of customers.

The configuration of the operating circuit is flexible and can adapt to various operating mechanisms.