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Caution! Please read this manual carefully before installing and using the circuit breaker: The installation and use of circuit breakers must comply with the requirements of this manual. Circuit breaker should be used in accordance with the normal indoor environmental conditions. Any operation and maintenance of the circuit breaker should be carried out by professional trained full- time electrical personnel.
1. Overview 1-1 General: VB 40.5 vacuum circuit breaker (hereinafter referred to as circuit breaker) is applicable to AC 50Hz and 35kV Power Systems, and can be used as protection and control equipment for industrial and mining enterprises, power plants and substations, and is applicable to frequently operated occasions.
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phases, but also protects each phase circuit from the influence of the external bad environment, prevents dust and foreign matters from entering the conductive circuit, and reduces the overall size of the circuit breaker. 2-2 Operating mechanism The operating mechanism of the circuit breaker is a spring energy storage mechanism. There are closing unit, opening unit composed of one or several coils, auxiliary switch, indicating device and other components in the mechanism box;...
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energy storage keeping block 17 energy storage latch closing interlock block handcart interlock block Fig. 2 side view of operating mechanism upper terminal vacuum chamber 22 fixed pole lower terminal 24 insulating pull rod 25 threaded rod 26 connecting plate 27 crank arm 28 connecting plate Fig.
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2-2-1 Energy storage The energy required for closing the circuit breaker is provided by the closing spring. Energy storage can be done either by motor or by hand with energy storage handle. Energy storage operation: it is carried out by the energy storage motor 7 fixed on the frame or by inserting the energy storage handle into the manual energy storage shaft 8 and shaking it clockwise.
2. After closing the circuit breaker, if the closing electric signal is not removed in time, the internal anti tripping controller of the circuit breaker will cut off the closing circuit to prevent multiple reclosing. 3. When the handcart type circuit breaker fails to reach the test position or working position, the handcart interlocking board 19 shall buckle the closing board and cut off the closing circuit to prevent the circuit breaker from entering the load area in the closing state.
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3-2 Mechanical characteristic parameters Item Unit Value Rated voltage 630/1250/1600/2000/2500/3150 18±1.0(Fixed sealing pole) Contact distance 21±2.0(Insulating cylinder) 4±1.0 Contact travel ≤2 Three-phase closing ≤2 Three-phase opening ≤3 Closing bounce time Average opening speed 1.3~1.9 Average closing speed 0.5~1.0 Opening time (rated voltage) 20~50 Closing time (rated voltage) 30~70...
4. Propulsion mechanism 4-1 Cabinet entry of handcart Close the valve of the interlocking piece 2 of the pushing mechanism, operate the left and right handles 1 to position B, and push the circuit breaker handcart into the switch cabinet along the guide rail until the pins 5 on both sides correspond to the positioning holes of the switch cabinet.
● Fixed type (terminal) 7. Installation, commissioning and operation 7-1 When the circuit breaker is lifted from the packing box, the hook shall be hung on the lifting position with lifting mark on the circuit breaker. When moving, the upper and lower outlet arms shall not be stressed, and the circuit breaker shall not be subject to large impact and vibration.
Manual operation test. 8. Maintenance Maintenance must be carried out by AEG personnel or the user's personnel who are familiar with the equipment and have been trained and qualified. If the maintenance is carried out by the user's personnel, the user shall be responsible for the consequences of the repair.
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8-3 Disassembly and replacement of circuit breaker parts shall be carried out by AEG personnel or corresponding trained personnel, especially during reassembly, necessary adjustment shall be made. 8-4 Maintenance of circuit breaker a.
9. Transportation and storage 9-1 When the product is transported, the circuit breaker shall be placed in a closed packing box without energy storage, and a proper amount of desiccant shall be built in. The circuit breaker shall be protected with plastic film to prevent water penetration during loading and unloading and dust intrusion during storage.
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Order number Product model (SAP) Over-current tripping coil (Y8) 26400056 36490042 Over-current control circuit board Closing locking electromagnet (S4) 26490381 Closing/opening control circuit board (please mention: operation voltage, whether there is anti- 26490463 tripping, whether there is locking) 26490093 Closing/opening auxiliary switch (QF) 26490090 Handcart position auxiliary switch (S8, S9) 26490580...