Order of performance of the laboratory work. 1. Preparation of the stent for the work.

1. Preparation of the stent for the work.

1.1. Switch on the toggle switch П8.

1.2. Using «U _C» make sure that the voltage is given to the scheme of the stend, it equals to 30 В.

2. Mode «Увімкнення генератора намережу».

2.1. Switch on the toggle switch is in the following positions: П2 – «Вимк.», П3 – «Нейтр.», П4 – «Стоп». Slider of the rheostat R ₀ must be in the rear down position. At the time the lamp «Ген. вимк.» is switched on, and the voltage of the generator U _Г = 0 В (according to the voltmeter " U _Г").

2.2. Lift up the slider of rheostat, gradually increasing the voltage U _Г and note the voltage:

а) operation Р1 and Р4 ДМР;

б) switching off Р4 ДМР;

в) operation of the polarized relay ДМР;

г) switching on the generators on the loads.

2.3. Ensure that after switching of the contactorauxiliary relays P2 and P3 switched on to ДМР and extinguished lamp «Ген. вимк.» is switched off.

2.4. Notice the received measurement results and order of elements triggering in ДМР in the report.

3. Mode «Зниження напруги генератора».

3.1. Switch on the toggle switch R ₀ leave in the rear down position; ensure that the generator is switched on to the onboard network with contactors of ДМР.

3.2. Adjust the switches to the ppositions: П-2 – «Зворот. Струм»; П3 – «U _Г < U _C».

3.3. Switching the toggle П4 to the position «Вимк.» start the step founder.

3.4. Notice order of elements triggering in ДМР and АЗП in this mode and write down the results in the report.

3.5. After switching on the lamp «Ген. вимк.» switch the toggles П4, ПЗ, П2 to the initial positions.

4. Mode «Перенапруга на генераторі».

4.1. Preparation (see. p. 3.1).

4.2. Switch the toggles to the positions: П1 – «Увімк.»,
П3 – «U _Г > U _C».

4.3. Switch on the toggle П4 to the position«Вимк.»

4.4. Describe the order of element’s operation (АЗП and ДМР) in the report.

4.5. After switching on the lamp «Ген. вимк.» switch the toggles П4 to the position «Стоп», and toggles П1 and П3 to the initial positions.

4.6. Press the button on the upper panel of АЗП.

5. Imitation of failure Р1 ДМР.

5.1. Rheostat R ₀ to switch to the rear down position.

5.2. Switch on the toggle П6.

5.3. Gradually increasing U _Г via R ₀, to make sure that the load generator does not switch on.

5.4. Notice the elements of АЗП and ДМР that operated in this mode in the report. Switch off the toggle П6.

6. Imitation of failure of relay Р2 АЗП.

6.1. Preparation according to pp. 3.1, 4.2.

6.2. Switch on the toggle П5. Start stepping finder using toggle switch to position P4 «Вимк.».

6.3. Make sure that the generator in this case is not disconnected fron the network. Note the elements АЗП and ДМР, which operated in this mode in the report.

6.4. Switch the tohhles to the positions: П1, П5, П8 – «Вимк.», П3 – «Нейтр.», П4 – «Стоп»