TESTING AND COMMESSIONINGOF

ELECTRICAL SWITCHGEAR

A switchgear or electrical switchgear is

a genetic term which includes all the switching devices associated with mainly power system protection.

It also includes all devices associated with control, metering and regulating of Electrical power system. Assembly of such devices in a logical manner forms a switchgear.

About Switchgear

CHALLENGES

Dec Jan Feb Mar1

10

100

Losses in panelSmooth operationProtection of mo-torCost control

Protects motor from running in Two Phases. Protects motor against reverse running Startup delay timer Protects motor against Unbalanced voltages. Inbuilt Current Transformer based Ampere Meter.

Star-Delta starter PANELS

Devices Used in Panel

Contactor

Terminal Connector

Devices Used in Panel

MCB Relay

Power circuit diagram

High Starting current

Starting current = 7 x full load current

As speed increases, stator current reduces

High transmission and current peaks. Low Starting Torque. Six Terminal Motor Required (Delta

Connected). Starting current is reduced to

approximately one-third of the rated current.

Losses in Star-Delta starter

A Variable Frequency Drive (VFD) is a type of

motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor.

Variable Frequency Drive(VFD)

Circuit Diagram of VFD(working)

Reduce Energy Consumption and Energy

Costs Increase Production Through Process

Control Extend Equipment Life and Reduce

Maintenance Energy savings High Power Factor Simple installation

Advantages VFD

Routine Test: 1) Functional test 2)Current Injuction 3)High Voltage Test Type Test: 1)Temperature rise test 2)Partial Discharge test

TEST SCHEDULE

Functional test: To check the basic function of, panel,

like to check the window of annunciator. Current Injection Test: In the current injection

test ,we are taking test on both side primary test as well as secondary test. At the time of testing any one side will be shorted. so we can testing the relay to with stand desirable current on the relay setting.

High Voltage Test: This test is conducted in order to protect the equipment from high voltage. This type plays a very important role.

Test Conducted(Routine Test)

1)Conveyor: is used for transportation of material

etc.By using VFD we can control variable speed and also we can set typical speed.

Applications

VFD Star/Delta starterFrequency can be changed Frequency cannot be

changedRamp Up/down time can be set

Ramp Up/down time cannot be set

2)Industrial Blower: is used for exhaust the

dust and generate vacuum in industries.

Applications

VFD Star/Delta starterSpeed can be changed as per requirement

Speed cannot be changed

Automatic power can be saved

Power saving cannot be done

3)Air compressor: is used for pneumatic

systems for modern industries.

Applications

VFD Star/Delta starterSpeed can be changed compressor loading/unloading time

Speed cannot be changed compressor loading/unloading time

So power saving can be done

So power saving cannot be done

4)Pumps: is used for pumping of water, oil ,

gas, etc.in industries.

Applications

VFD Star/Delta starterAccurate control speed and process

Accurate control speed and process can’t get

Operation & monitoring can be easily done

Operation & monitoring is difficult

As this project was sponsored to us by Chaitanya Enterprises. We have got the opportunity to work in the industry and because of this we have learnt how to get along and get the work done in the industrywe have manufactured and tested a control panel whose Significant energy saving,Easy setup &programming, Better design, Completive edge work has been appreciated by the industry guide.

CONCLUSION

THANK YOU…!