presentation on switchgear
TRANSCRIPT
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TESTING AND COMMESSIONINGOF
ELECTRICAL SWITCHGEAR
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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
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CHALLENGES
Dec Jan Feb Mar1
10
100
Losses in panelSmooth operationProtection of mo-torCost control
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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
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Devices Used in Panel
Contactor
Terminal Connector
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Devices Used in Panel
MCB Relay
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Power circuit diagram
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High Starting current
Starting current = 7 x full load current
As speed increases, stator current reduces
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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
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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)
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Circuit Diagram of VFD(working)
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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
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Routine Test: 1) Functional test 2)Current Injuction 3)High Voltage Test Type Test: 1)Temperature rise test 2)Partial Discharge test
TEST SCHEDULE
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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)
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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
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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
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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
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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
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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
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THANK YOU…!