bai giang thuc hanh mon dien co ban 9748

7/31/2019 Bai Giang Thuc Hanh Mon Dien Co Ban 9748

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electrical - electronic

Electronic Report of Basic Subjects

Group 2

Students:


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Content

I.The Electric Map and

Circuits on family

III. Motor 3 phase and motor 1 phase

VI.Control circuit

II. Power supply cord connection and

V.O.M

V.Measurement And Control Fan


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I.The Electric Map

1.Layout diagram

1.Layout diagram 2.Schematic diagram

2.Schematic diagram 3.Wiring Diagram

3.Wiring Diagram


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1.Layout diagram

Funtion:Locate loads

KWh


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2.Schematic diagram

Includes circuit:- Three Phase Transformer

6KVA/0.38KV- Single phase electric meters- CB- 2 Fuses- 2 Switch- 2 Light,2 socket (10A,20A)

6KV 0,38KV

10KVA3 4

KWh

KWh

CB 30A

R

R

R

R

R

K1

K2

K3

10A

20A

1~40


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3.Wiring Diagram

6KV/ 0,38KV

10A 20A

KWh

1~40

- 4 light

- 2 switch

- 2 socket

- Single phase electric meters

- 5 Fuse


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- System have wire mass

- Wire on plastic pipe

- Socket distance land 1.3m

- Pile resistance < or = 4 om

Note


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Circuits on family

Includes circuit:

- 1 light

-1 switch

-2 socket

- 1 Fuses

- CB


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Includes circuit:

- 1 light

-1 switch

- 1 Fuses

- CB

-Socket


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II. Power supply cord connection and V.O.M

1.Power supply cord connection

a. direct connection (communication connection head)- Crossed the wire 2 A and B (already broaching the shell and cleaned)

should join together

- A wire wound on the body B (close to around 10 rounds each)

- B winding wire on the body A (close to each other about 10 rounds)

Use pliers to tighten connections.


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b. Branch connections (T-connector):

- Place the wire A wire is perpendicular to the body B (the shell hasbeen grooming and cleaning).

- Wrap the wire A wire around the body behind the head string B of A,

the first wire wrap

- A round wire A to the front lines A and B wire wound on the body

for about 7 to

10 ring-side.

- Use pliers to tighten connections again


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c. Lead solder- Plug the burner to reach maximum temperature.

- Clean the surface with sandpaper connection.

- Resin dots on the burner (the burner cleaned by acid in the resin).

- Place the burner at an angle of 45 joints dovoi about 3 to 5 minutes

(depending on the type of burner 40W or 60W) for connection to heat up.

- How to put lead solder burner 1 to 2 mm for lead free flowing around thejoints.

- Connect the burner to reach maximum temperature.

- Rats need to shell the string si.

- Clean the surface of the wire.

- Resin dots on the burner (the burner cleaned by acid in the resin).

- Place the burner at an angle of 45 dovoi the wire about 3 to 5 minutes

(depending on the type of burner 40W or 60W) for the wire to heat up.

- How to put lead solder burner 1 to 2 mm for lead free flowing around the

wire.


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2. VOM- Meters VOM meter is called universal because it does much

use.

- VOM meter can measure currents, voltages, resistance. In addition, the

- VOM can be used for Testing Transistor, determine the polarity of the

diode ...


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-Elevator (A): Calibration for Ohm (-0 from right to left as the -).- Elevator (B) and (C) dividing the Volt, Ampere DC, AC

(DC.VA & AC.V) left to right, the maximum number of 0.

- Scale (D) read Trasistor amplification factor (HFE = Ic / Ib).- Elevator (E) and uterus (F): read current polarization upon or against

(leakage) of

Diode.- Scale (G): one is to read the leaked ICEO of transistors

** Practices

1.Voltage measurements:

- When you want to measure voltage alternating current (AC) or DC

(DC), we adjust

switch on the meter of the measuring period is denoted AC.V or DC.V

- Select appropriate measurement period (larger) with a voltage to be

measured.

- Install parallel to the clock source to be measured.


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-Read the voltage value measured on this scale.

+ 10 volt scale: each bar is 0.2 units.

+ 50 volt scale: each bar unit LA1.

+ 250 volt scale: each bar is 5 units.

For example: choose period, we measured 250 index on the scale read 250

AC.V.

Note: - When measuring AC voltage, attention select appropriatemeasurement range, avoiding- choose smaller voltage range to be measured or choose another

measurement range

voltage measurement.2. DC current measurement:

-- When you want to measure DC DC (DC), we adjust the switch onclock period of measurement is denoted DC.mA

- Select the period to match the measured current to be measured.

- Install with the serial clock source to be measured.

- Read the voltage value measured on the scale corresponds to the range

measured.


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3. Testers- When you want to measure the electrical resistance R, we adjust the

switch on the measuring range is denoted

.

- Choose a suitable measuring range resistor to be measured.

- Chap 2 measuring stick together and adjust the knob for the needle 0

standards.- Put the rod 2 measured in the first two resistors to be measured.

- Read the index measured on the scale corresponds to the range

measured.


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III Motor 3 phase and motor 1 phase

1. Testers heat engine

Step 1: Measure R insulation (check for shells being touched or not)> 1 mg

- If the first measure in turn the AX, BY, CZ with shell insulation resistance> 1 mg

shall meet the requirements => do not touch the shell => machine operating

conditions

Step 2: Measure R (coil resistance) AX, BY, CZ are equal

- Measure the pairs AX and determine the resistance of the coil day.Sau it shall bethe same for the pair BY, CZ

- Case 1:

1. Voltage coil 3 is measured at several volts, the coil (I, II) will have the

following: A_X_B_Y

2.Neu measuring coil 3 is the U = 0V (X_Y) first rolled coil connecting the 2nd

strategy was as follows: A_X_Y_B-Case 2: After measuring the change determined before the 3rd roll to roll 1 or roll

2 rolls to determine the remainder of the 3rd roll

* Experimental:

Scroll I: 1-4

Scroll II :2-5

Scroll III :3-6


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U = 0vV


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2.3-phase motor conector


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Motor 3 phase Xung shun


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Picture of motor 3 phase


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Y 900

A 1050

E 1200

B 1300

F 1550

H 1800

C >1800

*INS:insclass

*S.F: service factor

*Frame:- structural parameters, such

as structure height of the motor shaft

from the floor, the distance of the axisof the fixed point the base installation.

- example:Engine Frame: 215, then

we get the first two numbers divided 4

so 5 * 1 / 4, this is the height of the

shaft from the floor and 5 are set

distance from a fixed point on the axis

of the base (inch )

* U1U2=W1W2=V1V2

*


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3. 1-phase phase motor conector

S. W : stort winding

R. W: run winding

RR. W > RS. W

Experimental: RR. W = 50V, RS. W =20V


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Picture of motor 1 phase


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VI. Control circuit

1. Components in control circuits

a.CB


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b.Contactor

NC(normally closed):0

NO(normally opened):


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c.Thermal relay


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d. Time relay


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2.Control Circuit

a. Jumpstart circuit Direct Engine 3 Phase Asynchronous

Step 1: Close CB

Step 2: Press FOR

Step 3: Test Machine Runs And then OFF Press


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b. Boot directly Asynchronous Motor 3 Phase reversal Back

Step 1: Close CB

Step 2: Press FOR

Step 3: Press OFF and note direction of rotation of

the engine REV Then click Back to make

comparison engine => press OFF to stop engine


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c. Motor starter circuit / of asynchronous three-phase relay time

Step 1:close CB

Step 2: Adjustment time relay 3 to 5 seconds

Step 3:press FOR after 3 seconds of the transfer

Step 4: press OFF


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d. Change Speed circuit 3-phase motor

Step 1:close CB

Step 2: press FOR

Step 3: Mt press, engine performance at low speeds,

the stator windings of the motor's auction

Step 4: Mc Press, engine performance at high

speeds, the stator windings of the motor's auction=> Press OFF to stop engine


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Requirements:

- determine the correct position of the Closing Next, Open Your Contactor,

Thermal relay, buttons

- Check Point Next Good Or Not There

- Connect the wires in place

- Electrical Inspection Before Closing

- Connect and notice how

- Control relay time


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V. Measurement And Control Fan

1. Map here of a Phase Electric Fan

Requirements: - Determine the wire- Investment in Title Roll

- Fan runs

Step 1: Wire played by 2 first, determine R4-R5 = Rmax

Step 2: 3 wire connection head left and measurement with R4, R5

will determine R4, R5 (R5> R4)

Step 3:Measure R4 top line top line with 3 remaining, define R1, R2, R3 (R1 >R2 >R3 )

The End

bai giang thuc hanh mon dien co ban 9748

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