BGH32-12F Outdoor High Voltage AC Vacuum Circuit Breaker
Data： 2021-03-12 10:41:07 Hits： 770
BGH32-12F
Outdoor high voltage AC vacuum circuit breaker
Scope of application
BGH32-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) is an outdoor power distribution equipment with a rated voltage of 12KV, three-phase AC, 50HZ. The circuit breaker is mainly used for breaking and closing load current, overload current and short circuit, quick-break, grounding protection, optional reclosing times, local remote control and remote communication in the power system. It is suitable for substations and industrial and mining enterprises. Used for protection and control in electrical systems. When a user's internal fault occurs in the T-type wiring of a 12KV line, or although it occurs inside the user's incoming switch, its protection action time limit and improper protection of the substation's outgoing switch will cause the substation's outgoing switch protection to open. If the fault is permanent and the substation recloses unsuccessfully, an accident in the medium voltage user's field will cause the entire distribution trunk to be out of power.
Such common spreading accidents in the power grid will cause significant losses to society. BGH32-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) (hereinafter referred to as circuit breaker), installed at the responsibility demarcation of the overhead line, that is, the front end of the user's incoming line, will automatically remove the single-phase ground fault and phase-to-phase in the user Short-circuit faults can prevent faults in the user community from spreading to the mains transmission line, ensure the safety of electricity use for non-faulty users, and improve the reliability of electricity use.
Reference Standard
Boundary switch body part
GB 1984-2003 AC high voltage circuit breaker
GB/T 11022-1999 Common technical requirements for high-voltage switchgear and control equipment standards
DL/T813-2002 12kV high voltage AC automatic recloser technical conditions
GB 1985-2004 high voltage AC isolating switch and grounding switch
GB3309-1989 Mechanical Test of High Voltage Switchgear at Room Temperature
GB 5582-1993 External insulation pollution level of high voltage power equipment
GB311.1-1997 Insulation coordination of high-voltage power transmission and transformation equipment
GB1207-2006 electromagnetic voltage transformer
GB 1208-2006 Current Transformer Intelligent Control Device Part
GB/T 7261-2000 Basic test methods for relays and devices
GB/T 11287-2000 Electrical relays Part 21: Vibration, shock, impact and seismic tests of measuring relays and protection devices Part 1 Vibration test (sinusoidal)
GB/T 14537-1993 Impact and collision test of measuring relays and protection devices
GB/T 17626.4-2008 Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity test
DL/T 721-2000 Remote Terminal of Distribution Network Automation System
Model and meaning
Normal use conditions
Ambient air temperature: -45°C~+40°°C; Daily temperature difference: Daily change is not more than 25°C; The altitude of the mouth does not exceed 2000 meters;
The wind speed is not more than 35m/s (equivalent to 700Pa on the cylindrical surface);
The thickness of icing does not exceed 10mm;
The sunshine intensity is not more than 100ow/m2;
The pollution level does not exceed the IV level of GB 5582;
The α seismic fracture degree does not exceed 8;
There is no place with flammability, explosion hazard, chemical corrosion and severe vibration;
If the product use conditions exceed the above regulations, it is determined by the user and the manufacturer through consultation.
Main functions of the controller
Three-stage overcurrent protection zero sequence protection
Recloser control
Auxiliary function (power-on closing, power-off opening) port acceleration function
Remote communication α nearby remote control
The main technical parameters
Features
The single-phase grounding fault is automatically removed. When a single-phase grounding fault occurs on the user branch line, the boundary circuit breaker is automatically opened, and the users of the substation and other branches on the feeder cannot feel the occurrence of the fault.
Automatically isolate phase-to-phase short-circuit faults. When a user branch line has a phase-to-phase short-circuit fault, the boundary circuit breaker trips before the substation outlet protection switch, automatically isolates the fault line, and will not affect other branch users on the feeder. Quickly locate the fault point. When the user branch line fault causes the boundary circuit breaker to protect the operation, only the user is responsible for power outage, and the user actively reports the fault information. The power company can quickly send personnel to the site for investigation; if the boundary circuit breaker is equipped with a communication module, it will automatically Report the information to the power management center. Monitor user load. When the demarcation circuit breaker can be equipped with wired or wireless communication accessories, the monitoring data can be transmitted to the power management center to realize remote real-time data monitoring of user load. Remote operation function.
Product structure
The demarcation circuit breaker is optimized and improved on the basis of the BGH32-12 vacuum circuit breaker and is composed of an external voltage transformer and MGK16 intelligent controller. It is electrically connected through a fully sealed waterproof aviation connector and an outdoor sealed cable. The boundary circuit breaker adopts a special spring operating mechanism (or permanent magnet mechanism), which has the functions of hand and electric energy storage, hand and electric closing, and hand. electric opening. The boundary circuit breaker is equipped with a zero-sequence CT (or three-term composite zero-sequence), the transformation ratio is 20/1, the 0.1~5A (primary current) section maintains a linear relationship, the rated load is 10, the transformation ratio error under the rated load Should be less than 3%. The primary zero sequence current is 40OA, and the effective value of the secondary output current is not less than 5A. Rated short-time withstand current 16kA, 2OkA, 25KA, 4S. Boundary circuit breaker is equipped with 2 (or 3) single-phase CTs, transformation ratio 50-600/5 (or user-specified transformation ratio), rated load 10Q, accuracy 10P20, rated short-time withstand current 16kA, 2O0kA, 4S . The boundary circuit breaker adopts an external PT, which is installed on the power supply side, with a transformation ratio of 10000V/220V, a capacity of 30OVA, and a precision of 3P. The operating power and voltage signals of the controller and the circuit breaker are provided by the PT.
Shape and installation dimensions
