WCB-821_ Xuji Microcomputer Factory Transformer Protection Device

NegotiableUpdate on 03/29

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

WCB-821_ Xuji Microcomputer Factory Transformer Protection Device

Product Details

1. Introduction to the device

The WCB-820 series microcomputer factory transformer protection device is mainly suitable for the protection of factory transformers, utility transformers, or grounding transformers in small grounding current systems or small resistance grounding systems with voltage levels of 3-10kV.

1.1. Function configuration: Please refer to Table 1-1

Table 1-1: Functional Configuration

	Function Name	WCB-821	WCB-822
protection function	Two stage current protection	√
	Three stage timed composite voltage blocking current protection		√
	non-electrical protection	√	√
	High voltage side three-stage zero sequence overcurrent protection	√	√
	Low voltage side three-stage zero sequence overcurrent protection	√	√
	TV disconnection detection	√	√
	High voltage side positive sequence reverse time overcurrent protection		√
	Overload protection	√	√
	Zero sequence overvoltage protection		√
	low voltage protection		√
	Two stage timed negative sequence overcurrent protection		√
	Low voltage side zero sequence inverse time overcurrent protection		√
Measurement and control function	Remote signaling input acquisition, device remote signaling displacement, accident remote signaling	√	√
	Normal circuit breaker remote control opening and closing, low current grounding detection remote control opening and closing	√	√
	Telemetry of analog quantities such as Ia, Ib, Ic, Ua, Ub, Uc, P, Q, f, etc	√	√
	Statistics of switch accident opening and closing times and event SOE, etc	√	√
	fault recording	√	√
	4-channel pulse input	√	√

1.2. Main features

1. The reinforced unit chassis is designed to resist strong vibration and interference, and is particularly suitable for harsh environments. It can be installed separately on the switchgear for operation.

2. All integrated circuits are made of industrial products, ensuring high stability and reliability of the device.

3. Using 32-bit DSP as the protection CPU, configured with large capacity RAM and Flash Memory; Strong data operation, logical processing, and information storage capabilities, high reliability, and fast running speed.

4. Using 16 bit A/D as data acquisition, data collection is conducted 24 hours a week to ensure high measurement accuracy.

5. Adopting graphical LCD display and fully Chinese menu style human-computer interaction; It can display various operating statuses and data in real time, with detailed and intuitive information, and easy operation and debugging.

6. It can independently set 8 sets of protection settings, and the switching of the setting area is safe and convenient.

7. Large capacity information recording: capable of storing no less than 100 recent historical reports, with action parameters, power failure maintenance, and easy accident analysis.

Adopting DL/T667-1999 protocol and equipped with RS-485 communication interface; Networking is economical and convenient, and can directly communicate with microcomputer monitoring or protection management machines.