WXH-811A Xuji Microcomputer Line Protection Device

NegotiableUpdate on 03/29

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

WXH-811A Xuji Microcomputer Line Protection Device

Product Details

1 Overview

1.1 Application scope and protection configuration

The WXH-811A series line protection device is suitable for a complete set of digital protection devices for 110kV voltage level transmission lines.
The protection of WXH-811A series devices includes three-stage phase to phase and ground distance protection, four stage zero sequence protection, etc., and is equipped with three-phase reclosing function. In addition, this series of devices also includes a dual bus AC voltage switching circuit and an outlet operation circuit suitable for single or double trip coils of circuit breakers.
The specific configuration is detailed in Table 1-1.
Table 1-1 Protection Configuration of WXH-811A Series Devices

	Function Name	WXH-811A/B1
protect function	Three phase to phase and grounding distance	√
	Four segment zero sequence current	√
	Three phase primary reclosing	√
	Overcurrent after TV disconnection	√
	Double circuit line moves rapidly successively	*
	Asymmetric sequential rapid action	*
	Contract Period	*
	Low cycle load reduction	*
	Low voltage load shedding	*
	Short circuit between phases on the low voltage side of the transformer The backup distance	*
	Fault free quick reset	*
	Circuit breaker failure startup	*
	overload	*
other function	Voltage switching circuit	√
other function	操作回路回路	√

Note: √ represents the typical configuration functions of this model of product, * represents the optional functions of this model ...............

1.2 Product Features

Based on the high-performance and highly redundant Xuji next-generation hardware platform, visual logic development tools are used to achieve transparent protection design. The principle of variable action characteristics comprehensively improves protection performance, and the main feature of this protection device is the concise design of device settings, menus, information, etc.

1.2.1 Characteristics of Protection Function

a、 Optional functions can be reliably and quickly completed through configuration tools;
b、 Adopting high-performance, reliable, and powerful Xu Ji next-generation hardware platform, 16 bit high-precision dual AD, floating-point operation 32-bit DSP, fully considering redundancy and functional expansion.
c、 The visual logic development tool VLD, in the VLD development environment, all protection logic is composed of different visual flexible relays, achieving complete transparency design of microcomputer protection;
d、 The software runtime memory content is recorded in the "log system" and the protection logic information is recorded in the "black box" to achieve fast and accurate positioning of abnormal situations;
e、 The device adopts a whole panel and a standard 6U chassis, with plug-in connections and strict separation of strong and weak electrical circuits, greatly improving the anti-interference ability of the device;
Comprehensive self inspection of the AD circuit, CPU plugin, relay coil, and other components of the device;
f、 Optional functions can be reliably and quickly completed through configuration tools;