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.docxMINISTRY OF EDUCATION AND SCIENCE OF THE REPUBLIC OF KAZAKHSTAN
ALMATY UNIVERSITY OF POWER ENGINEERING AND TELECOMMUNICATION
Department of Power supply of industrial enterprises
Electrical apparatus
Laboratory work №1
Theme №1 « A study of DC relay »
Performed by: Sadan E.
Group: EPEe-15-11
Checked by: Senior Lecturer Amangaliev E.Z
Almaty 2017
Aim of the work: Acquaintance with operating principle, determination of the characteristic and parameters of electromagnetic relay.
Using equipment:
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Module “Electromagnetic relay”
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Module “Stopwatch and light-signal fixture”
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Module “Switch module”
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Module “Measuring module”
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Module “Autotransformer”
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Connectional conductor
Order of the implementation of the laboratory work:
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To study theoretical materials enough for performing this laboratory work
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According to the scheme perform electrical connections of modules for study electric magnetic relay
The order of performing
Increasing the voltage of autotransformer TV2 from 0 V to moment of triggering of relay K1(tuning on inductor HL1, tuning off inductor HL2). Decreasing the voltage of autotransformer TV2 from 24V until moment of releasing relay K1(tuning off inductor HL1, tuning on inductor HL2).
We need to calculate coefficient of return and reserve.
Nominal parameters of electromagnetic relay: Pnom=2.5W, Unom=24V
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Make a conclusion
|
№ |
1 |
2 |
3 |
4 |
5 |
|
Uav,V |
11 |
10.5 |
10.3 |
10.3 |
10.4 |
|
Iav, mA |
35 |
34.2 |
33 |
35 |
32.9 |
|
Unom,V |
24 |
24 |
24 |
24 |
24 |
|
Inom,A |
0.104 |
0.104 |
0.104 |
0.104 |
0.104 |
|
Urel,V |
4 |
4.2 |
4.3 |
4 |
4.4 |
|
Irel,mA |
14 |
15 |
14 |
15 |
15 |
|
Kr,(U) |
0.36 |
0.4 |
0.41 |
0.38 |
0.42 |
|
Kr,(U) |
2.18 |
2.28 |
2.33 |
2.33 |
2.3 |
|
Kr,(I) |
0.4 |
0.43 |
0.42 |
0.42 |
0.42 |
|
Kr,(I) |
2.97 |
3.04 |
3.1 |
2.97 |
2.97 |