RUPP
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SOFT STARTER
Applications
A soft starter motor which has a current of 1.5-2.5 amps, is a device used with synchronous and induction motors where power of up to 12,000 kWh or more is needed to remove the restriction on the number of starts. Soft starters extend the lifespan of the electric motors, enginery and process equipment while decreasing the stress caused by voltage in the electrical distribution network and improve the operation of other consumers, etc.
Soft starter advantages over thyristor voltage regulators:
- the price is 3-4 times less
- absence of voltage unbalance in electrical distribution network
- incomparable simplicity – around 10 passive elements, instead of hundreds of low-current, and power electronics
- incomparable higher reliability
- possibility of hermetically sealed construction and outdoor installation with external temperatures from - 50°С to +50°С
- no need for maintenance and replacement of items for 20 years
Principles of operation
Operation is based on the parametric limit of the starting current of the motor and its stabilization at a given level up to the nominal rotating speed. Sinusoidal voltage is stored throughout the acceleration.
Advantages of using soft starter over direct starting
- Sharp decrease of voltage stress in the electrical distribution network
- Opportunity to start high-voltage motors from the network that would be inadequate for a direct start-up, or stand-alone generators to perform, without overstating their power taking into account the start-up mode
- Extend the lifespan of the electric motors
- Extend the lifespan of the enginery and process equipment
- Extend the lifespan of the high-voltage protective switching and transformer electric devices and electrical networks
- Improved operation of other consumers
- Reduce engine heating by starting current caused by a sinusoidal voltage and current
Figure 1.Graphs of the starting current of the motor with power of 800 kW and pressure in the pump chamber at direct start and soft start.
Прямой пуск - Direct start
Плавный пуск - Soft start
Decoding of the soft starter RUPP marking
Условное наименование - symbol
Напряжение питающей сети, В - Supply voltage, V
Мощность, кВт - Capacity, kW
Климатическое исполнение - Climatic version according to GOST 15150
Категория размещения - Placement category according to GOST 15150
Без высоковольтного шунтирующего аппарата -without high-voltage shunting device
С полуавтоматическим управлением - with semiautomatic control
С высоковольтным шунтирующим аппаратом - with high-voltage shunting device
RUPP connection
Ячейка распредустройства - Switchgear cubicle
Разъединитель распредустройства с заземляющими ножами - Switchgear disconnecting switch with earthing knives
Вакуумный контактор или выключатель - Vacuum contactor or switch
Устройство плавного пуска - Soft starter
Система управления - Control system
Пусковое устройство - Starter
Шунтирующий аппарат - Shunting device
Датчик тока - Current sensor
Электродвигатель (нагрузка) - Electric motor (load)
Main technical features and overall dimensions of RUPP
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Rated capacity Рн, kW |
Sullpy voltage Uн, kV |
Rated current Iн, А |
Overall dimensions, mm |
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А |
В |
С |
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|
200 |
6 |
27,5 |
900 |
2000 |
1000 |
|
250 |
32 |
900 |
2000 |
1000 |
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|
315 |
6/10 |
38/23 |
900 |
2200 |
1000 |
|
400 |
47/29 |
900 |
2200 |
1000 |
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|
500 |
58,5/36 |
900 |
2200 |
1000 |
|
|
630 |
74/45 |
900 |
2200 |
1000 |
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|
800 |
92/57 |
900 |
2200 |
1000 |
|
|
1000 |
115/71 |
1000 |
2200 |
1100 |
|
|
1250 |
143/86 |
1000 |
2200 |
1100 |
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1600 |
183/109 |
1000 |
2200 |
1100 |
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|
2000 |
226/138 |
1000 |
2200 |
1100 |
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2500 |
279/172 |
1100 |
2400 |
1200 |
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3150 |
346/215 |
1100 |
2400 |
1200 |
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4000 |
444/267 |
1100 |
2400 |
1200 |
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5000 |
548/330 |
1300 |
2400 |
1400 |
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6300 |
690/427 |
1300 |
2400 |
1400 |
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8000 |
876/540 |
1300 |
2400 |
1400 |
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