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| Application: | Pressure Regulator |
| Phase: | Three |
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The SVR line automatic voltage regulator is a device that ensures the stability of the output voltage by tracking the line voltage changes and automatically adjusting the transformation ratio of the device itself. It can automatically adjust the input voltage within the range of ±20%. It is especially suitable for lines with large voltage fluctuations or lines with large voltage drops. Install this feeder voltage regulator in series in the middle of 6kV, 10kV and 35kV lines. At the rear, the line voltage is adjusted within a certain range to ensure the user's power supply voltage and reduce the line loss of the line. In addition, the SVR feeder automatic voltage regulator is also suitable for substations where the main transformer does not have the ability to regulate voltage. This voltage regulator is installed on the outlet side of the transformer in the substation to ensure the bus voltage on the outlet side. It has a wide range of applications in the national rural power grid, urban power grid, oil field, coal, chemical industry, substation and other fields.
technical parameters:
1. Rated capacity: 2000KVA, 3150KVA, 4000KVA, 5000KVA 6300kVA, 8000KVA 10000kVA, etc. Special specifications can be customized.
2. Rated voltage: 0.4KV, 6kV, 10kV, 35kV
3. Frequency: 50 Hz
4. Voltage adjustment range: -20%~+20%
5. Gear position: 7-9 gear
6. Connection group: Ya0
7. Transformer oil grade: 25#, 45#
8. Cooling method: ONAN
9. Insulation level: LI60kV/AC25kV(6kV), LI75kV/AC35kV(10kV), LI200kV/AC85kV(35kV)
10. The SVR line automatic voltage regulator adopts a fully sealed corrugated oil tank with oil temperature indication and pressure relief valve; the box has a built-in single-phase voltage to provide sampling signals and working power for the controller;
illustrate:
1. The choice of voltage level should match the line voltage level;
2. The selection of rated capacity is generally 1.1 to 1.2 times the sum of the distribution and variable capacity after the installation point of the regulator.
3. Examples of selection basis for voltage regulation range:
The voltage of the input terminal of the voltage regulator is 9~11kV, and the selection voltage regulation range is: -10%~+10%;
The voltage of the input terminal of the voltage regulator is 8.66~10.66kV, and the selection voltage regulation range is: -5%~+15%;
The voltage of the input terminal of the voltage regulator is 8~10kV, and the selection voltage regulation range is: 0~+20%;
The voltage of the input terminal of the voltage regulator is 7~10kV, and the selection voltage regulation range is: 0~+30%;
Three-phase oil-immersed on-load tap-changer:
1. The resistance of each contact of the switch: related to the number of stages of the on-load tap-changer, <500μΩ
2. Switch electric operation change time: 10s
3. Switching transition resistance switching time: 15~24ms
4. The electrical life of the contacts of the switch under the rated capacity: >50000 times
5. Mechanical life of switch: >500000 times
6. Switch transition mode: single resistance or double resistance
Voltage regulator:
1. Working power supply: AC/DC 110-450V
2. Rated frequency: 50Hz
3. Maximum power consumption: 25W
4. Analog input: 2-way voltage (0,250V)
5. Switch input: 10-way empty contact input
6. Switch output: 2 channels (AC250V/380V l6A)
7. Measurement accuracy: voltage (0.5%)
8. Anti-interference level: meet the requirements of IEC61000-4:1995 level
main feature:
(1) The whole device has large capacity, low loss, small volume, and easy installation and maintenance;
(2) Track the voltage change and automatically adjust the position of the three-phase on-load tap-changer, with reliable action and high voltage adjustment accuracy;
(3) The voltage reference, action delay, allowable range, and number of times can be adjusted as needed, and the parameter setting is flexible and convenient;
(4) Display the SVR on-load tap-changer gear action times and current gear, with the highest and lowest gear indications;
(5) It has the upper and lower limit protection of gears, and the action time limit function, which effectively improves the reliability of the product;
(6) The controller has the functions of over-voltage drop and under-voltage protection. When the line is in over-voltage or under-voltage state, the controller automatically locks; to ensure the safe operation of the on-load tap- changer
(7) The controller adopts industrial-grade control chip, which has high reliability and strong anti-interference ability, and can adapt to harsh outdoor environments;
(8) With RS485 communication interface, the parameters of the controller can be viewed and modified through the wireless communication module.
Environmental conditions:
1. Altitude: ≤2000m
2. Ambient temperature: -25ºC~+45ºC
3. Relative humidity: less than 90%
4. Anti-pollution ability: Class III
5. Installation inclination: < 2%
6. There is no filthy and corrosive medium around the device that seriously affects the insulation performance of the device, and there is no danger of fire and explosion in the workplace, and no violent vibration.
Note: When the working environment exceeds the above conditions, the user needs special instructions when ordering.
1. Production design standards:
JB8749-1998 General technical requirements for voltage regulators
GB1094-2013 Power Transformer
GB/T6451-2008 Three-phase oil-immersed power transformer technical parameters and requirements
GB/T17468-1998 Guidelines for selection of power transformers
GB10230-2007 On-load tap-changer
GB/T1058-1989 Guidelines for the application of on-load tap-changers
DL/T572-2010 Operation Regulations for Power Transformers
2. Acceptance criteria:
The voltage of the SVR line automatic voltage regulator installation point meets the requirements of the national standard GB/T12325-2008 power supply voltage deviation standard: the sum of the absolute value of the positive and negative deviations of the power supply voltage of 35kV and above does not exceed 10% of the rated voltage; 20kV and below three The allowable deviation of the phase power supply voltage is ±7% of the rated voltage; the allowable deviation of the 220V single-phase power supply voltage is +7% and - 10% of the rated voltage.
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