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Motor Protection Relay For Switchgear - China

price: contact company for price

Wanlida protection relay of Switchgear is a new solutions

integrating switchgear measurement, display, protection and


Motor Protection Relays of Medium voltage switchgear

DM-100 series of switchgear intelligent protection,

measurement, display and control device is the product

developed by Zhuhai Wanlida Electric Co., Ltd, combining

with many years of operational experiences in power industry

and by the effective integration of switchgear measurement,

display function and miccroprocessor-based relay protection

and control functions.

Firstly create segregated installation mode

DM-100 switchgear intelligent protection, measurement,

display and control device is designed by the main body of

device and human-computer interface segregation. The main

body of the device can be independently installed in the

instrument room of switchgear, and the large number of

wiring connected with control cable and analog signal

acquisition cable can be directly connected with terminal

strip within the instrument room, the man-machine interface

of the device can be installed on panel of instrument room

so as to focus on various human-computer interaction

function and communicate by Ethernet with protective main

body. It not only reduces the pressure of protective device

on the panel, but also greatly reduces the setting of over-

door cable.

Device features:

Originally created "protection", "measurement and display"

integrated products. with sophisticated switchgear

intelligent collection and control function.

It uses real-time multi-task operating system and C++

programming techniques and can carry out on-line programming

and simulation.

It uses large-screen color LCD with beautiful display, and

is easy to be operated. The user-defined buttons below the

screen define different functions combining with different

menus, which is easy to be operated. Meanwhile, each menu

offers help function to prompt the operation method of the


The communication uses dual-RS485 interfaces and dual

Ethernet interfaces. It supports power industry standard

code IEC-60870-5-103 and IEC-60870-5-104 communication

protocol. It can easily achieve redundant communication by

providing more communication interfaces.

It has harmonic analysis function of two-way selectable


Device functions

1. Intelligent measurement and display functions:

Dynamic simulation screen

Temperature and humidity control

Live display and lock

Voice misoperation protection and dynamic display

Body inductive probe

Lighting within the switchgear

2. Measurement and control functions:

14-way telesignalisation open collection and record

IA, IB, IC, UAB, UBC, UCA, P, Q, COSΦ, U0, I0, F remote

measurements uploading.

It has two-way 1~11 times, i.e. a total of 22-way to upload

harmonic waves so as to meet the monitoring requirements

of power quality.

2-way bidirectional-integral electrical energy (Active Power

and Reactive power).

SOE event records

One-way 4~20mA output

3. Other features

The independent operation circuit with electrical trip


Faults recorder

Small current circuit selection function

10 times trip records and 40 times event records

Many sets of constant value zones

Protective function

DM-100M (motor)

Current protection in three-section voltage lockout


Quick-break protection

Inverse-time overcurrent protection

Overcurrent protection

Overload protection

Current protection in direction of zero sequence voltage


√ (no direction)

Zero sequence current protection

Zero sequence overvoltage alarm

Zero sequence voltage lockout zero sequence current

protection at high-voltage side

Zero sequence constant time lag (inverse time lag) current

protection at low-voltage side

Locked protection

Overheat protection

Negative-sequence constant time lag (inverse time lag)

overcurrent protection

Low voltage protection

Over-voltage protection

Unbalanced current (voltage) protection

Under-voltage protection

Body protection

Low-cycle load shedding

Three-phase one-time reclosing


Bus bar charging protection

Technology shunt tripping (four-way)

PT broken line monitoring

Pt switch in parallel

Company Contact:

  • Phone: 867563395623

  • Address: Wanlida Relay Protection Industrial Park, No. 1 Te, Zhuhai, China

  • Email: Email

Published date: August 22, 2013 -

  • Business Description: Incorporated in 1991, Zhuhai Wanlida Electric Co., Ltd. (www.zhwld.com)

    ('the Company'), is located in Relay Protection Industrial Park, No.1

    Technology Road, Science and Technology Innovation Coast, High tech

    Zone, Zhuhai City, coving a land area of approximately 60 thousand

    square meters (including Park 1 and Park2). The Company was listed for

    equity financing on November 13, 2007 (equity securities abbreviated as:

    Wanlida stock certificates, code: 002180), with a registered capital of

    124,980,000 Yuan. The Company keeps on her aggressive 'production,

    study, research and application' co operation with the famous academies

    such as Tsinghua University, Chinese Academy of Sciences and Central

    China University of Science and Technology and carries out relevant

    technology innovation. It is a national high tech enterprise that deals

    with specialized development, production and sales of substation

    integrated automation systems and Medium voltage variable frequency

    drives, Medium voltage magnetically controlled soft starters, Static

    synchronous compensator(STATCOM/SVG), Static VAR compensator(SVC),

    Active power filter(APF/AHF), Thyristor switched capacitor bank

    (TSC/TSF), High voltage direct current light transmission systems etc

    power electronic equipments. In addition, the Company is known as a

    famous manufacturer and backbone enterprise of transformer substation

    integrated automation and power electronic equipments fields in China,

    and it also acts as fresh blood in the field of energy conservation and

    emission reduction.

    Wanlida passed the ISO9001 quality system certification, ISO14001 Environment Management System Certification and OHSMS18001 Occupation Health &Safety Management System Certification; All products passed the test of sated authoritative inspection bureau. And it had been rated as 'National High and New Technology Enterprise', 'Enterprise Recommended by State Economic and Trade Commission for Reconstruction of Urban and Rural Electric Grids', 'Key Software Enterprise Covered by National Program', 'Excellent enterprise of China', 'First choice Manufacturer for Electric Framework Protocol Sponsored by CNPC', 'Excellent Enterprise of Guangdong Province', 'Optimum Good faith Enterprise of Guangdong Province', 'Contract honoring Enterprise of Guangdong Province', 'Top 10 Private Enterprises of Zhuhai City', and 'Enterprise with Grade AAA Bank Credit '.

    Wanlida has a very strong R&D teamwork which has a population of over 100 with doctor's degree, postgraduate degree and bachelor's degree etc, and all of the products are designed strictly according to IEC standards; Wanlida has modern standard workshops, it brought advanced SMT production lines and wave soldering machines into company from abroad, and built the first class high voltage and big capacity power electronic equipments assembling and test platform, which is able to realize full load test and ensure that all of products have exquisite technics and reliable quality; At present, Wanlida covers all of domestic areas except Hongkong, Macau and Taiwan, and it also sells the products to Southeast Asia, Middle East, South America, Africa etc over 20 countries.

    The Company aims to grow into the most dedicated electric automation enterprise in the world, and commits itself to building the aircraft carrier of power electronic energy efficiency products.

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