2. Breaker failure protection device (уров)

The device is designed to disable the related supply connections at the circuit breaker failure of adhesion, which is shorted out.

Functional diagram of the breaker failure protection device is shown in Figure 4. Unit shown in Figure 4, implemented in software.

The device has a set point on the current operation and two set points in time.

Breaker to trip, but the availability of current exceeding the set point, also requires start-up.

The device is triggered automatically when the internal MT3 to disable or via a digital input from other security devices.

If triggered, the device with the first delay and without time delay (first stage) re­acts on a different circuit to the failed breaker and if it does not turn off, counted a specified time (second stage) acts on the adjacent feeder disconnect connections.

Via digital inputs can be made on / off breaker.

In that case, if the trip breaker is made via a digital input, the subsequent incorporation must necessarily produce a digital input.

Fig.4 Functional scheme actuation of УРОВ block.

4. Work order

The task for the practical test automation functions: a double automatic reclosing AFIB, device backup breaker device MP3A-05 consists of a stage settings features automatic reclosing and breaker stage and feed via remote input values of the current

drawdown of MT3 to the input of МРЗЛ-05 and time management recloser and breaker performance.

2. The parameters and the accuracy of their measurement

The parameters and the accuracy of their measurement are given in Table 1.

Table 1

Obtaining parameters	Nominal value and measurement range	Maximum deviation
Exposure time of automatic reclosing command (АПВ), of: - 1 cycle	0,20 - 32,00	±3%
- 2 cycle	5,00 - 75,00	±3%
Time of actuation 1-st УРОВ, with	0 - 32,00	±3%
Time of actuation 2-nd УРОВ, with	0 - 32,00	±3%

2. Checking of апв.

1. Setting of parameters апв mp3c-05

Enter in to menu of MP3C-05, choose the program module КОНФИГУРАЦИЯ and set:

• АПВ - ЕСТЬ;

• MT3 - ЕСТЬ.

The other types of defend disable.

Sequetially choose program modules АПВ, НАСТРОЙКА and release ВХОДЫ, ВЫХОДЫ КОМ, ИНДИКАЦИЮ from previous function and set:

• ВЫДЕРЖКИ:

• 1 ЦИКЛ АПВ - 3 с;

• 2 ЦИКЛ АГ1В - 10

• БЛОКИР АПВ1 -15 с;

• БЛОКИР АПВ - 8 с;

• УПРАВЛЕНИЕ:

• АПВ-ВКЛ;

• 2 ЦИКЛ АПВ - ВКЛ;

• ПУСК ОТ МТЗ 1-ВКЛ;

• ВЫХОДЫ КОМ:

• Р06 - КОМ ВКЛ 1 ЦК Л АПВ - ВКЛ;

• Р07 - КОМ ВКЛ 2 ЦКЛ АПВ - ВКЛ;

• ИНДИКАЦИЯ:

• СДИ1:

• ПУСК АПВ ОТ МТЗ - ВКЛ;

• СДИ2 - КОМ ВКЛ 1 ЦКЛ АПВ - ВКЛ;

• СДИЗ - КОМ ВКЛ 2 ЦКЛ АПВ - ВКЛ;

• УВВ:

• ИНДИКАЦИЯ:

СДИ1 - СДИ6 - НОРМАЛЬНЫЙ

Sequentially choose program module МТЗ, НАСТРОЙКА and set:

• УСТАВКИ:

• УСТАВКА МТ31 - 2,7 А;

• ВЫДЕРЖКИ:

• ВЫДЕРЖКА МТ31 - 0 с;

• УПРАВЛЕНИЕ:

• ВАРИАНТ МТЗ - НЕЗАВИСИМАЯ;

• 1 СТУПЕНЬ МТЗ - ВКЛ;

• ВЫХОДЫ КОМ:

• Р02:

• СРАБ 1 СТ МТЗ - ВКЛ;

4.3.2. Changing parameters of АПВ.

Set on the remote test voltage 60 V on phases А, В, C. Slowly increase the current la on the remote from the minimum value to the drawdown of 1 tablespoon MT3 (diagnostic drawdown of 1 MT3 performed on the ignition, the LED on the device ДВ1 MP3A-05). Reduces the current la on the remote until the LED goes out Т1ДВ. Since the extinction of the LED type 1 diabetes starts the 1 st cycle reclosing. By the end of the exposure time of 1 st cycle of АПВ on the front panel of the 05 MP3A should be lighted indicator type 2 diabetes. During the time of blocking the 1 st cycle АПВ imitate drawdown and return MT31. At the time of return MT31 start the 2 nd cycle of АПВ. At the end of time delay the second cycle of АПВ on the front panel of the 05 MP3A should be lighted indicator СДЗ.

Lock the ignition time on the L/J,B МРЗЛ-05 LEDs ДВ 1, ДВ2, СДЗ 0:СД1,1СД2, tC ДЗ). Calculate the formula during the first cycle of AFIB T1:

T1 ⁼ tc Д2^—tcA 1 ’

where t^i-time return MT3| and start the first cycle of АПВ (extinction LED T1ДВ) t_C/i2 - the time since the end of time delay the first cycle of AI IB (ignition type 2 diabetes). See Figure 2. Timing diagrams of a two-fold AI IB.

Calculate the formula during the second cycle of АПВ T2:

T2 = t_C/i3-t_t^i

where tqm-time return MT31 launch the second cycle of АПВ (extinction LED Т1ДВ) tC_fl2 - the end of time delay 2-second cycle reclosing (Ignition СДЗ).

Change ВЫДЕРЖКИ ЛИВ:

• 1 ЦИКЛ ЛИВ - 5 с;

• 2 ЦИКЛ АПВ-12 с; and repeat procedure.

Obtained result put into the table. Compare calculated times with permissible value from table 1.

2. Check УРОВ

1. Adjustment of parameters УРОВ

Enter into menu of MP3C-05, and choose program module КОНФИГУРАЦИЯ and set:

• УРОВ - ЕСТЬ;

• МТЗ - ЕСТЬ.

The other types of defend disable.

Consequentially choose program modules МТЗ, УРОВ, НАСТРОЙКА and release ВХОДЫ, ВЫХОДЫ КОМ, ИНДИКАЦИЮ, О-ФУНКЦИИ from previous function and set:

• УСТАВКИ:

• УСТАВКА МТЗ 1-2.9 A;

• ВЫДЕРЖКИ:

• ВЫДЕРЖКА МТ31 -Ос;

• УПРАВЛЕНИЕ:

• ВАРИАНТ МТЗ - НЕЗАВИСИМАЯ;

• 1 СТУПЕНЬ МТЗ - ВКЛ;

• УСТАВКИ:

• УСТАВКА I УРОВ - 2,5 А;

• ВЫДЕРЖКИ:

• 1 СТУПЕНЬ УРОВ - 3 с;

• 2 СТУПЕНЬ УРОВ - 5 с;

• УПРАВЛЕНИЕ:

• УРОВ-ВКЛ;

• ВЫХОДЫ КОМ:

• Р02:

• СРАБ 1 СТ МТЗ - ВКЛ;

• Р05 - СРАБ 1 СТ УРОВ - ВКЛ;

• Р06 - СРАБ 2 СТ УРОВ - ВКЛ;

• ИНДИКАЦИЯ:

• СДИ1:

• ПУСК УРОВ ОТ МТЗ - ВКЛ;

• СДИ4 - СРАБ 1 СТ УРОВ - ВКЛ;

• СДИ5 - СРАБ 2 СТ УРОВ - ВКЛ;

2. Change the parameters of УРОВ.

Set on the remote test voltage 60 V on phases А, В, C. Slowly increase the current la on the remote from the minimum value to the drawdown of 1 tablespoon MT3 (control drawdown of 1 tablespoon MT3 performed on the ignition, the LED on the device ДВ 1 MP3A-05). On the front panel 05 MP3A should be lighted displays " 1" "4”, "5".

Lock the ignition time on the ЕДВ MP3A-05 LEDs T1D, ДВ4, СД5 (tl, t4, t5). Calculate the formula response time of the first stage УРОВ: tlct = t4-tl

Calculate the formula response time secondary breaker: t2ct = T5-tl Change ВЫДЕРЖКИ:

1. СТУПЕНЬ УРОВ - 25 с;

2. СТУПЕНЬ УРОВ- 30 с and repeat procedure.

Obtained result put into the table. Compare calculated times with permissible value from table 1.

5. Contents of report

1. Cover sheet with the name of the laboratory work.

2. Description of the process diagnostics parameters MP3A-05.

3. Measured and calculated times of AIIB and the breaker.

4. Conclusions.

• УПРАВЛЕНИЕ:

• УРОВ-ВКЛ;

• ВЫХОДЫ КОМ:

• Р02:

• СРАБ 1 СТ МТЗ - ВКЛ;

• Р05 - СРАБ 1 СТ УРОВ - ВКЛ;

• Р06 - СРАБ 2 СТ УРОВ - ВКЛ;

• ИНДИКАЦИЯ:

• СДИ1:

• ПУСК УРОВ ОТ МТЗ - ВКЛ;

• СДИ4 - СРАБ 1 СТ УРОВ - ВКЛ;

• СДИ5 - СРАБ 2 СТ УРОВ - ВКЛ;

2. Change the parameters of УРОВ.

Set on the remote test voltage 60 V on phases А, В, C. Slowly increase the current la on the remote from the minimum value to the drawdown of 1 tablespoon MT3 (control drawdown of 1 tablespoon MT3 performed on the ignition, the LED on the device ДВ1 MP3A-05). On the front panel 05 MP3A should be lighted displays "1" "4", "5".

Lock the ignition time on the ЕДВ MP3A-05 LEDs T1D, ДВ4, СД5 (tl, t4, t5). Calculate the formula response time of the first stage УРОВ: tlct = t4-tl

Calculate the formula response time secondary breaker: t2ct = T5-tl Change ВЫДЕРЖКИ:

1. СТУПЕНЬ УРОВ - 25 с;

2. СТУПЕНЬ УРОВ - 30 с and repeat procedure.

Obtained result put into the table. Compare calculated times with permissible value from table 1.

5. Contents of report

1. Cover sheet with the name of the laboratory work.

2. Description of the process diagnostics parameters MP3A-05.

3. Measured and calculated times of AIIB and the breaker.

4. Conclusions.