SS_Electromech_Report

SS Electromech Private Limited

Jeedimetla Phase V

18th Dec 2013 1

Introduction

S.S. Electromech Engineers Pvt. Ltd., (SSEEPL) is located in Hyderabad one

of the fastest growing Metro Cities in South India in the State of Andhra

Pradesh.

SSEEPL is Promoted by Mr. R. SADASIVA REDDY a first generation

entrepreneur, primarily to manufacture power equipment which caters to the

requirements of Power Transmission and Distribution Industry.

The company manufactures

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S.S. Electromech Engineers Pvt. Ltd., is a reliable partner for supply of

Complete Motor Operating Mechanism / Manual Operating Mechanism as per the

customer’s requirement.

•Motor Operating Worm Reduction Gear Boxes with A.C/D.C Motor.

•Manual Operating Worm Reduction Gear Boxes.

• Motor Operated Mechanisms / Manual Operated Mechanisms to operate

disconnections up to 800 KV.

• The company products are sold to the O.E.M’s like Siemens Limited, Crompton

Greaves Limited etc., and the end users include Power Grid Corporation of India

Limited (PGCIL), National Thermal Power Corporation Limited (NTPCL) and all the

power utility companies in India, besides its products are also exported to a variety of

companies through these O.E.M’s. The company is the biggest supplier in India in this

product category.

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Work Plan To conduct a process on MOM before dispatching to the customers

TargetWork for 10 days and finish the target by December 17th

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Motor Operated Mechanisms / Manual Operated

Mechanisms

•Introduction

•Important parts

•Working

•Application

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Introduction

The manual-operated mechanism type is

designed for outdoor installations and used for the

operation of high voltage disconnectors and

earthing switches. It is normally mounted on the

side of the transformer tank and by means of drive shafts

and bevel gears connected to the Tap-Changer.

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Important parts

•Anti-condensation heater

• Cabinet light

• Step-by-step relay

• Contactor, Raise

• Contactor, Lower

• Motor

• Door operated switch

• Position transmitter, potentiometer

• Continuation contact

•Terminals

• Measuring amplifier

• Outgoing shaft

• Hand crank

• Crank shaft

• Break pin

• Break disc

• Cam disc for maintaining contact

• Operation counter

• Multi position switches

• Rating plate

• Motor-drive mechanism cabinet door

• Hand knob

•Air vent

• Intermediate shaft

• Helical pinion

• Position indicator shaft

•Arm for end stop

• Knob for mechanical end stop

•Spring for brake

•Printed circuit card18th Dec 2013 7

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WorkingRaise-Operation with Local Control

Lower-Operation with Local Control

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Raise-Operation with Local ControlWhen switch S1 is set in position ”Local” the mechanism

can be operated by control switch S2. For a raise operation

the procedure is as follows:

•Motor contactor K2 is energized, the contactor closes the

motor phases, the motor starts and drives the

mechanism in the raise-direction. After about 0.2 seconds

the brake is released and after about 0.4 seconds

the maintaining contact S3: 33-34 closes and take over

the feeding of contactor K2 when control switch S2 is

released.

•The switching in the On-Load Tap-Changer takes place

after about 3 seconds.

•The driving mechanism keeps on rolling until the cycle is

completed, which takes about 5 seconds. About 0.2

seconds before the cycle is completed, the maintaining

contact S3 is released, contactor K2 falls and the feeding

of the motor is interrupted. At the same time the

brake is engaged and the mechanism will stop in the

new position.18th Dec 2013 10

Lower-Operation with Local Control

•A similar cycle is obtained, but in the lower direction,

when the control switch S2 is switched to lower position

and contactor K3 is engaged.

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Thank You

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