Tap Changer Motor Drive Unit for Oltc

General

SHM Intelligent motor drive Unit is an intelligent and universal on-load tap changer drive unit designed by

Huaming. Its outstanding features is to use information technology, microelectronic element and computer

technology to substitute the existing conventional electrical element with contacts and whose function has to be

completed by means of mechanical motion. The on-load tap changer motor drive unit on the domestic or fortian

market used to adopt mechanical element witch contacts,as well as a very complicated drive control system

comprising of switch contactor, relay,cam switch, travel switch, cam lever, lever and spring. This complicated

actuation system affects the life and quality of the motor drive. And SHM is controlled by electronic signal, So

the electric pave and mechanical part can be seperated. Therefore, the life and reliability is greatly improved.

Two versions are available, SHM-I and SHM-II.SHM-II is designed for retrofit purpose.

Introduction of features
Manual operation and automatic operation
Remote control operation and local operation
Step-by-step operation as well as overrunning continuously
Local position indicating, remote position indicating
Local operation push button
Record of operating times
Reliable overload protection
Standard aviation socket terminal, easy to connection.
BCD code position signal output contact
Over-current lockout protection input terminal
One to one position signal output contact (terminal block)

Working condition
1 Altitude must not exceed 2500 meters
2 Ambient temperature: -25ºC~ 40ºC
3 Vertical mounting gradient can’t exceed 5%
4 Free of serious dust or explosive, corrosive gas.

Design
SHM-III type motor drive unit adopts modular and standardization design principles. computer program encoder
and photoelectric conversion technology to substitute the previous mechanical elements with contacts. The
connection/disconnection of electrical signal can be realized without contact and mechanical control. SHM motor
drive realizes the separation of mechanical and electrical. The mechancal part and electrical part are installed
in separate housing thus the electrical element influence caused by environment will be reduced to a minmun.

Appearance of control cabinet
1 The housing consists of two parts, the housing and the cover ,which both are cast at low pressure.by
corrosion-resistant aluminum alloy. Protective paints coated on the surface, The whole housing and the cover
are fully-sealed , its protection grade of IP66.
2 There are 2 aviation sockets as inlet passage on the bottom of the housing.

Internal structure
1 Drive section
Drive unit is a low noise and pulley drive system, For one tap change, SHM-I output shaft will turn 16.5
revolutions, SHM-II output shaft will turn one or two revolutions.
Note: Pulley system must not contact lubrication oil.

2 Position indicating section
The indication dial shows clearly the position of motor drive unit and on-load tap changer.
The electromagnetic counter records the actual operations of motor drive unit. This section is not necessary to
make maintenance as the mechanical drive of whole position indicating and photoelectric conversion section
are installed in a sealed cabinet.

Main technical data

COMPANY PROFILE:
Main product line: Tap changer and HV switchgear
Tap changer manufacturing with fullest vertical integration
Tap Changer Products Range On-Load Tap Changer:
* Conventional OLTC for transformer with voltage up to 765kV
*Vacuum OLTC for oil transformer with voltage up to 765kV
*Vacuum OLTC for dry transformer with voltage of 72.5kV
Off-Circuit Tap Changer
* Application for the transformer with voltage up to 765kV

Our Services

FAQ

Our advantages:

Quality Assurance

–From the very beginning, VILLE ensures quality in every step to achieve the best quality.

 Experience Sharing

–With more than 30 years’ experience in power industry, VILLE brings you an optimized solution.

 Global Service

–Wherever you are, VILLE global network will support and provide you with value.

 Quick Response

–In response to your needs without delay, VILLE  knows the value of your time.

Thanks for choosing VILLE as your reliable partner and
please trust both of us will create a brilliant future!
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