Minor Project1

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Transcript of Minor Project1

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MINOR PROJECT

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ON

CONTROL PANEL

(SUBMITTED IN PARTIAL FULFILLMENT DIPLOMA IN ELECTRICAL ENGINEERING IN 5TH SEMESTER)

SWAMI DEVI DYAL COLLEGE OF TECHNICAL EDUCATION BARWALA, PANCHKULA

SUBMITTED TO:

(LECT.OF EE)

MR. ANUJ SAINI

SUBMITTED BY:

NAME: SANJEEV

ROLL NO. 0805709038

BRANCH: ELECTRICAL ENGG.

SEM. 5TH

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Recognized By:

State Board of Technical Education Haryana

Department of Electrical Engineering

CERTIFICATE

This is certify that SANJEEV (0805709038) of DIPLOMA 5th

semester (Electrical Engineering) has successfully completed the minor project entitled application “CONTROL PANEL”

Diploma in

Electrical Engg.

During the academic year 2008-2011.

We wish him a period, happy and bright future with all the great silivery success in their career.

Er. Sandeep Sharma Project Incharge

(HOD of Electrical) Er. Anuj Saini

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MINOR PROJECT REPORT

ACKNOWLEDGEMENT

For building of this minor project our group took the help of our department lecturers only, We were trying to take the help of internet but that help were not sufficient to complete the project we needed to concern our lectures and our lecturers guide us in the way that the project became to easy to complete and we completed our project easily and successfully.

We took the help of

Er. Anuj Saini

Er. Sandeep Sharma (HOD of Electrical Deptt.)

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ContentTopics Page no.

• MCC PANELS 6

• PCC PANELS 8

• DIRECT ON LINE STARTER 10

• REVERSE DIRECT ON LINE STARTER 13

• STAR DELTA STARTER 15

COMPONENTS

• VOLTMETER 16

• VOLTAGE SELECTOR SWITCH 17

• AMMETER 18

• PUSH BUTTONS 19

• INDICATING LAMPS 21

• CONNECTING LEADS 22

• THIMBLES OR LUGS 23

• CURRENT TRANSFORMER 24

• POTENTIAL TRANSFORMER 26

• POWER CONTACTOR 28

• AUXILIARY BLOCK (NC) 30

• CONNECTING TERMINALS 31

• THERMAL OVERLOAD RELAY 32

• MINIATURE CIRCUIT BREAKER 33

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MCC PANELS

(Motor Control Center Panel)

A motor control assembly of one or more enclosed sections to a central control terminal panel board. These highly efficient panels are effectively used with motor or submersible pumps and provide sufficient protection from overloads and short circuits. These motor control panel provide central power switching control various motor and provide safety to the system as well as operator.

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MCC(Motor Control Center)

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PCC PANELS

(Power Control Center Panels)

PCC offered us is considered as the heart of an electrical system of industry.

These panels are easy to install, operate and are high in performance and low in maintenance. Mostly used in electronic based operations, these panels are used in various industries like electronic and electrical industries engineering and automotive industries.

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PCC(Power Control Center)

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DOL (Direct On Line Starter)

A 3-phase induction motor can be started direct on line i.e. by connecting the rated three phase voltage to the motor terminals at the time of starting. This can be done simply by using a triple pole iron clad (TPIC) switch but this will not Provide any type of protection against over load, a thermal overload and a contactor unit to be used along with a TPIC switch. The contactor for can be energized or de-energized by pressing separate push-buttons starting or stopping the motor. This system will also provide no. volt protection to the operator or the machine driven by the motor.

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Direct On Line Starter

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Reverse Direct On Line Starter

In some applications, motor is to be run in one direction for a particular period and then in opposite direction for some other duration. The direction of rotation of a three-phase induction motor can be changed if supply connection of any of the two phases is reversed. This can be done by using RDOL starter.

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Reverse Direct On Line Starter

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Star Delta StarterFor the starting of 3-Phase induction motor, starters are used for reducing the starting currents. Above 5 H.P. motors, Star/Delta starters are installed. DOL starter will not decrease the starting current by connecting the motor but Star/Delta starter reduces the in rush of starting current by connecting the motor winding first in star connections then switch over to delta connections.

Star/Delta Starter

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Volt MeterIt is used to measure the amount of voltage in a circuit or supply. Voltmeter is always connected in parallel to the circuit or supply due to its high resistance and low current

Carrying capacity.

Voltmeter

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Voltage Selector SwitchA device which is used to select the voltage between the two phases of three phase input supply given to the control panel.

Voltage Selector Switch

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Ammeter

it is used to measure the amount of current in a circuit or supply. Ammeter is always connected in series due to its low resistance and high current carrying capacity.

Ammeter

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Push Buttons

Push buttons are basically used to magnetize the power contactor. When the push button is pressed the current flows through power contactor and energizes it. As the power contactor is energized it make contact and completes the circuit. GREEN push button is used to magnetize the power contactor and RED push button is used to demagnetize the power contactor.

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Push Buttons

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Indicating LampsIndicating lamps are used to indicate :

Red-Stop

Blue-Start

Yellow-Short circuit

Orange-Overload

Indicating Lamps

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Connecting Leads

Connecting leads are generally wires used for wiring purposes in control panels. Minimum 1.5 mm(square) diameter wire is used for control wiring and 4mm(square) wire is used for power wiring.

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Thimbles or Lugs

Thimbles are used where the open joints of wires are made to cover or seal that joint an insulating material made thimbles are used and also to protect and insulate that open joint.

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CT(Current Transformer)

In Electrical engineering , a current transformer (CT) is used for measurement of electric currents. Current transformer together with Voltage transformer (Potential transformer (PT)), are known as instrument transformers. When in a circuit is too high to directly apply to measuring instruments, a current transformer produces a reduce current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instrument. Current transformer are commonly used in metering and protective relays in the electrical power industry.

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Current Transformer

PT(Potential Transformer)

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Potential transformers are instrument transformers, they have a large number of secondary turns and a fewer number of primary turns they are used to increase the range of voltmeters in electrical substations and generating substations. They are also known as voltage transformer used for line and circuit protection.

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Potential Transformer

Power contactor

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An electrical relay used to control the flow of power in a circuit. It works on the principle of Electro Magnetic Induction (EMI) as the supply is given at the input it start working as an electro magnet and get attached to the metal surface, hence start conducting. When the supply is made off it become demagnetized and detach from the metal surface and stop conducting.

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Power Contactor

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Auxiliary Block (NC)Auxiliary contact is used to made an auxiliary function. NC(Normally Closed) auxiliary contact is used to have normally closed function as the push button is pressed.

Auxiliary Block (NC)

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Connecting terminalsIt is used at the end of the wire to connect the wire safely to the components used in the circuit.

Connecting Terminals

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Thermal Overload RelayThis relay is mainly used where the risk of short circuit is high. As this relay contain a thermal sensitive tripping mechanism. So, if short circuit occurs the temperature of wire rises and wire in the TOLR gets heat up and causes the tripping of the wire connected to it. Hence TOLR works.

Thermal Overload Relay

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Miniature Circuit Breaker (MCB)

MCB also works on the magnetic principle as well as on thermal principle during short circuit it works on the principle of TOLR as explained above and during overload the magnetic field in MCB become high from finite value and the coil connected to this field trips and opens the circuit.

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Miniature Circuit Breaker

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THANKS