SKU: 13
Main specifications:
- Rated voltage 20 kV
- Rated current 6300 A 8000 A 10000 A
- Rated breaking current 90 kA
- Electrodynamic withstand current 230 kA
- Thermal current 90kA
In terms of overall and connecting dimensions, the VGG-20-90/10000 U3 SF6 generator circuit breaker fully corresponds to and replaces the MG-20 oil circuit breaker.
Features:
- 3-pole circuit breaker with actuator and control elements completely assembled on a common frame
- for indoor installation
- no additional accessories required
- easy installation and commissioning due to the fact that the circuit breaker is supplied as a fully assembled and tested unit
- maintenance is required after 15 years or after 10,000 mechanical “B-O” operations.
Generator SF6 circuit breakers of the VGG type meet the requirements of the following regulatory documents:
- IEC standards
- GOST R 52565-2006"Switches alternating current for voltage from 3 to 750 kV"
- GOST 15150"Executions for various climatic regions in terms of the impact of factors external environment
- GOST 9.014-78"Unified system of protection against corrosion and aging"
- PB03-576-03"Rules for devices and safe operation of pressure vessels"
- TU3414-008-00213606-2008
switching capacity
Gas-insulated generator circuit breakers of the VGG type have four versions in terms of switching capacity:
- VGG-20-90/6300 U3
- VGG-20-90/10000 U3
- VGG-20-63/8000 U3
- VGG-15-50/6300 U3
Insulating properties
The design of the internal insulation of the circuit breaker is based on the unique insulating properties of SF6 gas and the special shape of the contacts and shields that create an almost uniform electric field.
The properties of sulfur hexafluoride SF6 (SF6) used in high-voltage devices (gaseousness, high dielectric strength, inertness) are preserved at normalized density and humidity for the entire service life.
The density of the SF6 gas is ensured by sealing each pole with sealing of detachable joints with rubber rings with controlled compression in grooves of a special shape. The service life of seals for 20 years determines the inter-revision period.
The humidity of the SF6 gas is ensured by the presence of an adsorbing filter in each pole.
Technological operations of testing products for gas tightness and SF6 for moisture, both in the conditions of the manufacturer's enterprise and during commissioning, provide the required initial properties of SF6 as a switching and insulating medium.
Installation and maintenance
- installation of a frame with three poles on racks
- installation of the drive and its connection with the transmission mechanism
- filling with SF6 gas, supplying power to the control and monitoring circuits of the circuit breaker
The key installation operation is filling the circuit breaker with SF6 gas to the required density and checking its moisture content. Installation and commissioning is carried out under the supervision of a chief engineer.
Main technical data
Parameter name | Meaning |
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VGG-20-90/10000 | VGG-20-63/8000 | VGG-20-90/6300 | VGG-15-50/6300 |
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Rated voltage Unom, kV | ||||
Maximum operating voltage | ||||
Rated current, In, A | ||||
Rated frequency, Hz | ||||
Through short circuit current: The highest peak (electrodynamic resistance current), id, kA; Root-mean-square value of the current during its flow (thermal resistance current) It, kA Current flow time (short circuit time), s | ||||
Rated breaking current, Iо.nom: | ||||
Rated making current: The largest peak, Iv.n, kA Initial effective value of the periodic component, Iv.n, kA | ||||
Generator short circuit current: Effective value of the periodic component, kA Relative content of aperiodic component β , % | ||||
Current under phase mismatch conditions (divergence angle 900) Switching current: Maximum peak, kA Effective value of the periodic component, kA | ||||
Breaking current Effective value of the periodic component, kA Relative content of aperiodic component βн, % | ||||
Emergency current when turned on in antiphase: Maximum peak, kA Initial effective value of the periodic component, kA | ||||
Unloaded transformer current, effective value, A | ||||
Own turn-on time, tv.s, s, no more | ||||
Own trip time, tо.с, s | (0.030±0.005) |
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Minimum absolute pressure of SF6 gas (at a temperature of plus 20°C), at which the nominal level of insulation is maintained, MPa | ||||
Upper limit of absolute pressure (filling pressure) of SF6 gas at a temperature of plus 20°C, MPa | ||||
SF6 leakage from the internal cavities of the circuit breaker per year, % of mass, not more than | ||||
Power of anti-condensate heating devices, W, max | ||||
Rated AC supply voltage heating devices, V | ||||
Current consumption of electromagnets of switching on (EV) and disconnection (EO) at rated voltage at the terminals of EV and EO circuits, A, not more than | ||||
Rated DC voltage at the terminals of the EV and EO circuits, Up, nom, V | ||||
The circuit breakers are designed for switching electrical circuits in normal and emergency modes, as well as for operation in automatic reclosure cycles in networks of three-phase alternating current with a frequency of 50 Hz and a rated voltage of 750 kV.
The circuit breakers are manufactured in climatic modification U (on request, it is possible to supply switches in climatic modification T), location category 1 GOST 15150, GOST 15543.1 and are intended for operation in open switchgears in temperate regions under the following conditions:
- environment - non-explosive, not containing aggressive gases and vapors in concentrations that destroy metals and insulation. The content of corrosive agents according to GOST 15150 (for atmosphere type II);
- The upper operating temperature of the ambient air switch is:
- for version U1 - plus 40°C;
- for execution Т1 - plus 50°С;
- The lower operating temperature of the ambient air switch is:
- for version U1 - minus 45°C;
- for execution Т1 - minus 10°С;
- relative air humidity: at a temperature of +15°C - 75% (the upper value is 100% at a temperature of +25°C);
- with ice with an ice crust thickness of up to 20 mm and wind speed up to 15 m/s, and in the absence of ice - with wind speed up to 40 m/s;
- installation height above sea level - no more than 1000 m;
- seismicity - up to 8 points on the MSK-64 scale;
- permissible tensile forces of wires in three mutually perpendicular directions A / B / C (directions - in accordance with GOST R 52565): 1750 / 1250 / 1500 N.
- Possibility of deliverydistribution cabinet.
Switches can, depending on the order, be equipped with insulators with pollution degree II *, III or IV according to GOST 9920.
Parameters
1. Main technical specifications
| Parameter name | VGG-UETM ® -750 | |
| 1 | Rated voltage, kV | 750 |
| 2 | Maximum operating voltage, kV | 787 |
| 3 | Rated current, A | 3150 |
| 4 | Rated breaking current, kA | 40 |
| 5 | Normalized percentage of aperiodic component, %, no more | 47 |
| 6 | Normalized parameters of through short-circuit current, kA: | |
| highest peak (short-circuit current) | 100 | |
| RMS value of the current during its flow (thermal current) | 40 | |
| thermal current flow time, s | 3 | |
| 7 | Normalized parameters of the switching current, kA: | |
| highest peak | 100 | |
| initial effective value of the periodic component | 40 | |
| 8 | Rated switching current of an unloaded overhead line, A | 500 |
| 9 | Rated shutdown current of the shunt reactor, A | 315±63 |
| 10 | Minimum shutdown current of the shunt reactor, A | 100±20 |
| 11 | Own trip time, s | 0,025 -0,003 |
| 12 | Total shutdown time, s, no more | 0,050 |
| 13 | Own turn-on time, s, no more | 0,1 |
| 14 | Operability of poles, s, not more than: | |
| when turned on | 0,005 | |
| when disconnected | 0,0033 | |
| 15 | Mass of SF6 gas in the circuit breaker, kg | 120 |
| 16 | SF6 gas consumption for leaks per year, % of SF6 mass, not more than | 0,5 |
| 17 | The absolute pressure of SF6 gas, reduced to a temperature of plus 20 ° C, MPa (kgf / cm 2): | |
| filling pressure (nominal) | 0,5 (5) | |
| alarm pressure | 0,44 (4,4) | |
| blocking pressure | 0,42 (4,2) | |
| 18 | Rated DC voltage of control electromagnets, V | 220/110 |
| 19 | Number of control electromagnets: | |
| including | 1 | |
| shutting down | 2 | |
| 20 | Rated motor supply voltage, V: | |
| Asynchronous three-phase | ~380 / ~230 | |
| Universal collector single-phase | ~230 / =220 | |
| 21 | Rated voltage of the drive cabinet heating system, V | ~230 |
| 22 | Maximum vertical dynamic force on the foundation (4 posts) of the semi-pole when the circuit breaker is actuated (without taking into account its own weight), kN | |
| up | 49 | |
| down | 40,7 | |
| 23 | Circuit breaker weight, kg, no more | 20500 |
2. The switches perform the following operations and cycles:
- shutdown (O);
- inclusion (B);
- switching on-off (VO), including - without deliberate time delay between operations (B) and (O);
- disconnection - inclusion (OB) at any non-contact pause, starting from tb.k., corresponding to tb.t.;
- switching off - switching on - switching off (OVO) with time intervals between operations according to p.p. 3 and 4;
- switching cycles:
- O - 0.3s - IN - 180s - IN;
- O - 180s - VO - 180s - VO.
- O - 0.3s - IN - 20s - IN;
3. The number of disconnection operations allowed for each pole of the circuit breaker without inspection and repair of extinguishing devices (resource for switching resistance) at short-circuit currents and load currents is:
- at a current equal to 100% of the rated breaking current - 20 operations;
- at a current equal to 60% of the rated breaking current - 34 operations;
- at operating currents equal to the rated current - 3000 operations "Enable-arbitrary pause-Disable".
The allowable number of closing operations for short-circuit currents should be no more than 50% of the allowable number of opening operations; the permissible number of closing operations at load currents is equal to the permissible number of opening operations.
4. Switches have the following reliability indicators:
- resource for mechanical resistance up to overhaul- 10000 operations "Inclusion - Arbitrary pause - Disconnection" without current in the main circuit;
- the service life before the first repair is at least 20 years, if the resource for mechanical or switching resistance was not previously exhausted. The need for repair is determined by the results of diagnostics of the technical condition of the circuit breaker;
- the service life of circuit breakers before decommissioning is at least 40 years.
Manufacturer: Electric device
Rated voltage, kV: 20
Maximum operating voltage, kV: 22
Rated current, A: 10000
|
Rated frequency, Hz | |
|
Through short circuit current: | |
|
RMS current | |
|
Current flow time (time | |
|
Rated breaking current, Iо.nom: | |
|
effective value | |
|
Relative content | |
|
Rated making current: | |
|
Initial effective value | |
|
Generator short circuit current: | |
|
effective value | |
|
Relative content | |
|
Current under phase mismatch conditions (divergence angle 90°) | |
|
Maximum peak, kA | |
|
2 Breaking current | |
|
Effective value of the periodic component, kA | |
|
Relative content | |
|
aperiodic component ext, % | |
|
Emergency current when turned on in antiphase: | |
|
Initial effective value of the periodic component, kA | |
|
Unloaded transformer current, effective value, A | |
|
Own turn-on time, tvs, s, | |
|
Own shutdown time, tос, s | |
|
Minimum absolute pressure | |
|
Upper limit of absolute pressure (filling pressure) of SF6 gas at a temperature of plus 20°C, MPa | |
|
SF6 leakage from internal | |
|
Power of anti-condensate heating devices, W, max | |
|
Rated voltage AC power supply heating devices, V | |
|
Current consumption of electromagnets | |
|
Rated voltage |
The high-voltage generator SF6 gas circuit breaker was developed by the Scientific Research Institute of High-Voltage Apparatus Engineering (NIIVA) and VO Elektroapparat OJSC. Generator circuit breaker VGG-20-90/10000 U3 is designed for switching operations in generator circuits.
Switch features:
3-pole circuit breaker with actuator and control elements completely assembled on a common frame
for indoor installation
no additional accessories required
easy installation and commissioning due to the fact that the circuit breaker is supplied as a fully assembled and tested unit
maintenance is required after 15 years or after 10,000 mechanical “B-O” operations.
Generator SF6 circuit breakers of the VGG type meet the requirements of the following regulatory documents:
IEC standards
GOST R 52565-2006 "AC switches for voltage from 3 to 750 kV"
GOST 15150 "Executions for various climatic regions in terms of the impact of environmental factors
GOST 9.014-78 "Unified system of protection against corrosion and aging"
PB03-576-03 "Rules for the design and safe operation of pressure vessels"
TU3414-008-00213606-2008
Installation and maintenance
installation of a frame with three poles on racks
installation of the drive and its connection with the transmission mechanism
filling with SF6 gas, supplying power to the control and monitoring circuits of the circuit breaker
The main installation operation is filling the circuit breaker with SF6 gas to the required density and checking its moisture content. Installation and commissioning is carried out under the supervision of a chief engineer.
In terms of overall and connecting dimensions, the VGG-20-90/10000 U3 SF6 generator circuit breaker fully corresponds to and replaces the MG-20 oil circuit breaker.
SF6 circuit breakers are a kind of high-voltage circuit breakers, which are a switching device using SF6 gas (sulfur hexafluoride, SF6) as an arc extinguishing medium; designed for operational switching on and off of individual circuits or electrical equipment in the power system, in normal or emergency modes, with manual, remote or automatic control.
The main advantages of SF6 equipment are determined by the unique physicochemical properties of SF6 gas. When used correctly, SF6 does not age and does not require such careful maintenance as oil.
The circuit breaker drive provides control of the circuit breaker - closing, holding in the on position and opening. The drive shaft is connected to the switch shaft by a system of levers and rods. The circuit breaker drive must provide the necessary reliability and speed of operation, and with electrical control - the lowest power consumption.
VG series circuit breakers
SF6 circuit breakers VG are designed for switching electrical circuits in normal and emergency modes, as well as for operation in automatic reclosure cycles in three-phase alternating current networks with a frequency of 50 Hz and a rated voltage of 110 and 220 kV.
Symbol of the circuit breaker VG Х-ХII*-ХХ/ХХХХ У1:
VG - SF6 circuit breaker;
X - symbol of design (K, B, E, T, P, G);
X - rated voltage, kV (110 or 220);
II* - category according to the length of the creepage distance along the external insulation in accordance with GOST 9920-89;
XX - rated breaking current, kA (40; 50);
XXXX - rated current, A (2500, 3150);
U1 - climatic version and placement category in accordance with GOST 15150-69 and GOST 15543.1-89.
Conventional designation of the circuit breaker drive PPrK-1800S:
P - drive;
Pr - spring;
K - cam;
1800 - work of static inclusion, J;
S is special.
Operating conditions of the VG circuit breaker:
- Installation height above sea level is not more than 1000 m.
- The ambient temperature is from minus 45 to 40°С.
- Relative air humidity not more than 80% at 20°C. Upper value 100% at 25°C.
Possible modifications
Switches VGT
- VGT-110 - SF6 circuit breaker VGT-110 column. It consists of three poles (columns) mounted on a common frame and mechanically connected to each other. All three poles of the circuit breaker are controlled by one spring drive type PPrK.
- VGT-110II-40/2500
- VGT-1A1-220
- VGT-220
- VGT-220II-40/2500
- VGT-35
Switches VGP
- VGP-110 II - 20/2500 UHL1 - gas-insulated column circuit breaker VGP-110 II - 20/2500 UHL1 for outdoor installation.
- VGP-110 II- 40/2500 U1
- VGP-220 II- 40/2500 U1
- VGP-220 II-20/2500 U1
Switches VGG
- VGG-15-50/6300 - generator SF6 circuit breaker VGG-15-50/6300 is designed for switching operations in generator circuits.
- VGG-20-63/8000
- VGG-20-90/10000
- VGG-20-90/6300
- VGG-330
- VGG-750 - column SF6 gas circuit breakers VGG-750 are designed for switching electrical circuits in normal and emergency modes, as well as for operation in automatic reclosure cycles in three-phase alternating current networks with a frequency of 50 Hz and a rated voltage of 750 kV, they are equipped with a spring drive.
VGK switches
- VGK-220-31,5/3150 - The VGK-220 SF6 circuit breaker is equipped with a spring-hydraulic drive PPGV-4 A2T-UHL1
- VGK-500-40/3150 - The VGK-500 SF6 circuit breaker is equipped with a hydraulic drive PGV-12AT-UHL1
- VGB-35-12.5/1000 - high-voltage gas-insulated tank circuit breaker for outdoor installation
- VGB-35-12.5/630
WB switches
- VB-110 II- 40/2500 U1 - tank SF6 circuit breaker VB-110-40/2500 UHL1 and U1 with spring drive type PprA-2000 and built-in current transformers.
Switches VGBU
- VGBU-220-40/2000 U1 - high-voltage SF6 tank circuit breaker VGBU-220-40/2000 U1 is designed for operation in open and closed switchgears in AC networks with a frequency of 50 Hz and a rated voltage of 220 kV.
VEB switches
- VEB-110 - Gas-insulated VEB-110 tank circuit breaker. It has a spring drive type PPrK-2000SM and built-in current transformers.
- VEB-220
- VEB-110II*40/2500 UHL1*
Switches VEKT
- VEKT-110-40/2000 - gas-insulated high-voltage circuit breaker, a mixture of SF6 and tetrafluoromethane (SF6 + CF4) is used as an arc-extinguishing and insulating medium
- VEKT-110-40/3150
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