Products

WGB-681A Generator Protection Device

WGB-681A generator protection device is a microprocessor-based unit designed to protect large capacity station service transformers, substation service transformers, and grounding transformers in small current or small resistance grounding systems up to 10kV. It can be installed directly in high voltage switch cabinets or within a screen body.

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Device introduction

WGB-681A generator protection device (Hereinafter referred to as the device) is a microprocessor-based protection device with advanced and complete functions, mainly applies to protect large capacity station service transformer, substation service transformer and grounding transformer in small current grounding system or small resistance grounding system of 10kV voltage class and under. It can be directly installed in the high voltage switch cabinet or installed in a screen body.

Function configuration

Protective Functions		Abbr
1	Instantaneous differential protection	InstDiff
2	Percentage differential protection	PcntDiff
3	Stage 1,stage 2 overcurrent protection with compound voltage blocking(memory)	OC1, OC2
4	Overload protection	OvLd
5	Inverse-time overload protection	InvOvLd
6	Three-stage negative sequence overcurrent protection	NegOC1, NegOC2, InvNegOC
7	Zero sequence overcurrent protection	ZeroOC
8	Overvoltage protection	OV
9	Undervoltage protection	UV
10	Zero sequence overvoltage protection	ZeroOV
11	Difference current out-of-limit protection	Diff_OOL
12	Current transformer supervision	CTS
13	Reverse-power protection	RevP
14	Loss of excitation protection	LossExc
15	Rotor one point earth-fault protection	1PEF_Rot
16	Rotor two points earth-fault protection	2PEF_Rot
17	Voltage transformer supervision	VTS
18	Four ways non electrical quantity protection	Non-E1, Non-E2, Non-E3, Non-E4
19	Control loop check	Control Loop Chk
20	Handcart position check	Handcart Pos Chk
21	Circuit breaker open position check	CB Open Pos Chk
22	Spring not store energy check	Spring not-E Chk

Measure and Control Functions
1	Remote signaling acquisition, device remote signaling change and fault remote signaling	√
2	Remote control tripping and closing circuit breaker	√
3	Analog telemetering: IA, IB, IC, Ua, Ub, Uc, Uab, Ubc, Uca, P, Q, f, Cosf	√

Fault wave records

√

Three channels 4-20mA direct current output

Optional

Four channels 4-20mA direct current input

Communication Functions
1	Two-way RS485 communication interface, support IEC-103, MODBUS-RTU communication protocols	√
2	Two-wayRJ45 Ethernet interface, support TCP-103, IEC-104 communication protocols	√
3	One-way time synchronization with pulse or B code mode	√
4	Support IEC61850 communication protocol	Optional

Main features

Thedevice has universal AC-DC Input Power, which has a wide adaptability :

Device has universal AC-DC auxiliary power supply; the maximum input voltage is 500V, suitable for all kinds of complicated power supply place;

Device has universal AC-DC operation circuit and binary input circuit power supply, which can apply to AC or DC power supply system.

The device has powerful communication function, standard device configure two Ethernet and two RS485 communication interface and convenient for multiple networking mode, device has flexible communication, which support IEC61850 (optional), IEC-103, TCP-103, IEC-104, MODBUS-RTUand other communication protocols, facilitate communication with a variety of convenient networking with various microcomputer monitoring or the protection and management.
Thedevice has rigorous time synchronization, which supports network time synchronization, PPS, PPM or B codes and other time synchronization mode
Using dual 32-bit high performance embedded microcomputer processor, RAM and flash memory with largecapacity; using SOC solution, which greatly enhanced the capability of data processing ， logic operation and information storage and advanced operational speed and reliability.
The device uses 16 high precision A/D for data acquisition, collecting 64 points per cycle, which has high measuring accuracy.
Back inserted and drawn modules, strong and weak electricity separation; enhanced unit chassis designed for resisting strong vibration and interference, which can be scattered installed on the switch
The device can keep more than 400 recent events record and operation record, can keep recording data of 5 times faults occurred recently.
Ithas liquid crystal display, English display and menu operation.
Real-timemultitasking operating system, modular programming; real-time, high reliability.
Thereare 8 sets of protection setting value, which are safe and convenient to switch.
It is optional for device to be configured with three channels 4-20mAoutput and four channels 4-20mA input，which is convenient for industrial customers to gather data and extend control functions.
Device has rich resource of binary input and Binary output, up to 30 channels Binary input and 16 channels binary output, standby relay output is not less than 6, base which it is convenient to extend or control signal output.
Devicehas complete operation circuit and remote controls of circuit breaker.
Highintegrated degree: device has protection, measure, control and other function.

Products

WGB-681A Generator Protection Device

WGB-681A Generator Protection Device

Device introduction

Function configuration

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