The product is suitable for miniaturised switchgear, dry gas, and reduces the volume of ring network cabinet by nearly 40% compared with that of the traditional vacuum circuit breaker, vacuum load switch, and combined electrical appliances, which can greatly reduce the space occupied by the equipment and save the overall investment in power engineering.
The Sealed vacuum circuit breaker is suitable for miniaturised switchgear, dry gas, and reduces the volume of ring network cabinet by nearly 40% compared with that of the traditional vacuum circuit breaker, vacuum load switch, and combined electrical appliances, which can greatly reduce the space occupied by the equipment and save the overall investment in power engineering.
Product structure characteristics
1 Vacuum circuit breakers and load switches adopt three-phase sealed pole structure, the vacuum interrupter and outlet terminals are sealed with epoxy resin materials with excellent insulation characteristics to form solid insulation through automatic pressure gel process (APG), the switch structure has high mechanical strength and solidity, and overcomes the shortcomings of inter-phase and ground isolation which are easily affected by filth, condensation and dew, and is less affected by the environment, and it also reduces the volume of the switch, which effectively increases the electrical safety performance of the equipments. It also reduces the volume of the switch, which effectively increases the electrical safety performance of the equipment.
2 Three switch modules are integrated, with their own disconnecting switches and clearly visible isolating breaks, which guarantees the safety of the operators. There is a reliable mechanical connection between the disconnecting switch and the circuit breaker (load switch) and earthing switch (optional). The disconnecting switch and the earthing switch are operated on the same operating shaft, and while closing the disconnecting switch, the earthing switch carries out the splitting operation. At the same time as the isolating switch is closed, the earthing switch is closed, and only one of them can be in the closed state, thus realising the interlocking of the earthing switch and the isolating switch.
3 The integrated three-switch module can be turned up and down to meet the requirements of different wiring schemes, such as upper and lower incoming, outgoing and contact.
4 The manipulator of the new circuit breaker (load switch) adopts the optimised spring manipulator, which can be operated electrically as well as manually, and the operating power is small, the stability and reliability of the mechanism is high, the mechanism and the switch are independent of each other, the adjustment and maintenance workload is small, and it is easy to realise intelligent automatic operation.
Switch operation principle
1 The main switch is divided and closed (circuit breaker, load switch): the operating mechanism (1) through the push rod (2) and abduction (4) will be transferred to the spindle (3), and then through the spindle on the A, B, C, three-phase abduction arm (5) to drive the edge of the control rod (6) and the abduction (7) action, so that the extinguishers plug dynamic Chiku conductive rod up and down movement from the west to achieve the main switch is divided and closed.
2 Isolating switch splitting and closing: Isolating spindle (9) Drive crutch arm (10) and absolute pull (11) action, make the isolating switch moving knife (12) to do the figure drive swing, realise the isolating switch splitting and closing.
3 Grounding switch splitting (conventional form of linkage operation): The grounding switch and the disconnecting switch are linked by means of a linkage mechanism; the disconnecting switch splits at the same time as the grounding switch, and the grounding switch splits at the same time as the disconnecting switch closes when the power is supplied.
4 Fuse impact release (load switch-fuse combination appliance): After any fuse is blown, the needle on the fuse pops out, driving the switch release plate to rotate and drive the release device in the organisation to make the switch trip.
Use of environmental conditions
2 Ambient air temperature:-25℃-+40℃
3 Air relative humidity: daily average not more than 95%, monthly average not more than 90%.
4 No corrosive or flammable gas, water vapour and other obvious pollution.
5 No regular severe vibration occasions.
Note: When the use of different environmental conditions or other special requirements, need to consult with the manufacturer.
5 Product reference standards
GB311,1-1997《AC power transmission and transformation equipment insulation with》
GB1984-2003 《High-voltage AC Circuit Breaker》
GB3084-2004 《3-3.6kv high-voltage AC load switch》
GB16926-2009 《High-voltage alternating current load switch-disconnector combination appliances》
GB1985-2004 《High-voltage alternating current disconnecting and earthing switches》
GB3309-1989 《High-voltage switchgear mechanical test at room temperature》
GB11022-1999 《High-voltage switchgear and control equipment standard shared technical requirements》
DLT403-2000 《12~40.5KV indoor high-voltage vacuum circuit breaker ordering technical conditions》
1 Insulating bracket 2 Frame 3 Vacuum Interrupter pole 4 Circuit breaker mechanism
5 Interlocking mechanism 6 Grounding switch 7 Disconnecting switch shaft 8 Main switch shaft
VXJ-12 Inverted type
1 Interlocking mechanism 2 Outgoing busbar 3 Main switch shaft 4 Frame
5 Disconnecting switch shaft 6 Over-centre mechanism 7 Vacuum Interrupter pole 8 Insulating bracket
VXJ-12Ⅱ Inverted type
1 Circuit breaker mechanism 2 Outgoing busbar 3 Main switch shaft 4 Frame
5 Over-centre mechanism 6 Vacuum Interrupter pole 7 Disconnecting switch shaft 8 Grounding contacts (mounted on cabinet)
VXJ-12G Ⅱ （Double isolation）
1 Upper insulating bracket 2 Over-centre mechanism 3 Vacuum Interrupter pole 4 Interlocking mechanism
5 Isolation spindle 6 Circuit breaker mechanism 7 Frame 8 Lower insulating bracket