ZN63A(VS1)-12 Indoor High Voltage Vacuum Circuit Breaker (Handcart Type, Solid-sealed Pole)

1. Environmental temperature: not higher than 40℃, not lower than -10℃ (storage and transportation at -30℃ is allowed).

2. Altitude: no more than 1 000m. (If the altitude is increased, the rated insulation level will be increased accordingly.)

3. Relative humidity: daily mean value is not more than 95%. The average daily value of saturated vapor pressure is not more than 2.2×10⁻³MPa, and the monthly mean value is not more than 1.8× 10⁻³MPa.

4. Seismic intensity: no more than 8 degrees.

5. Places without fire, explosion, serious pollution, chemical corrosion and violent vibration.

1. Energy storage action
The energy required to close the circuit breaker is provided by the energy storage of the closing spring, which can be completed either by driving the motor with an external power supply or manually by using the energy storage handle.
Energy storage operation: The energy storage motor 15 fixed on the frame is powered to output torque code, and the sprocket 14 is driven to rotate through the single bearing 13 of the motor output shaft 16, or the energy storage handle is inserted into the manual energy storage hole and rotated clockwise, and the sprocket 14 is driven to rotate through the worm wheel (11, 10), and then the sprocket 3 is driven to rotate through the chain 9. When the sprocket 3 rotates, the gear pin 1 pushes the slider 2 on the wheel 5 to make the energy storage shaft 21 follow the rotation, and the energy storage is carried out by stretching the closing spring through the crank arms 19 on both sides. When the energy storage position is reached, the limit pole on the frame will press down slider 2 to disconnect the energy storage shaft from the sprocket wheel drive system, and the energy storage holding button 7 will resist the roller 6 to keep the energy storage position. Meanwhile, the dial plate 23 on the energy storage shaft will drive the energy storage indicator to flip, showing the energy storage mark, and switch the stroke switch to cut off the power supply of the energy storage motor. At this time, the circuit breaker is in the closing state.

2. Closing operation
After the energy storage of the mechanism, the closing signal is received, the closing electromagnet 17 acts or presses the closing button, so that the energy storage holding shaft rotates, driving the button 7 to release the roller 6 and disengaging the energy storage holding. The closing spring 18 releases energy, so that the energy storage shaft 21 and the CAM 22 on the shaft rotate clockwise, and the driving plate 37 drives the insulating pull rod 34 to drive the moving contact up into the closing position through the transmission arms 36, and compresses the super range spring 33 to maintain the pressure required by the contact.
After the closing action is completed, the closing hold button 40 and half shaft 42 shall maintain the closing position; meanwhile, the energy storage indicator and the energy storage stroke switch shall be reset; the power supply circuit of the motor shall be connected; the closing indicator shall show the "ON" mark; if the external power supply is also connected, the energy storage state shall be entered again.
Note: When the circuit breaker is in the closing state or the latching device is selected, but the external power supply is not connected or the handcart circuit breaker is in the process of pushing, the closing operation cannot be carried out.

3. Opening operation
After the closing operation is completed, once the opening signal is received or the opening button is pressed, the opening exit electromagnet or the over-current tripping electromagnet will act, so that the constraint of the opening half shaft 42 on the closing hold button 40 will be released. By the ability of storage of the super range spring 33 and the brake spring 35, the moving and static contacts of the interrupter 29 are disconnected to realize the opening operation. In the latter part of the opening process, the hydraulic buffer absorbs the residual energy of the opening process and limits the opening position. The indicator shows the mark of "OFF". At the same time, the counter 43 is pulled to realize the counting of the counter. The main and auxiliary switches are switched by the driving connecting rod.

1. During the normal use of the circuit breaker, the body of the circuit breaker should be properly inspected regularly. Clean the dirt and moisture on the surface of the equipment, wipe the insulating surface with a dry cloth, and then wipe off other dirt with a silk cloth stained with detergent (note that the detergent can be applied to plastic or synthetic plastic materials). The vacuum degree of the vacuum interrupter is checked by the power frequency voltage withstand method. It is normal to have weak lighting outside the interrupter during the voltage withstand process. If continuous breakdown of the interrupter is found, the interrupter should be replaced.

2. When the circuit breaker is placed for a long time, the active part of the circuit breaker may be blocked. The energy storage and closing and opening operation of the circuit breaker should be carried out at least 5 times a year.

3. It is strictly forbidden to hit the vacuum interrupter with hard objects during installation and use.

4. The user should not arbitrarily replace the use of electrical components inconsistent with the original model specifications.

5. The operator should have a preliminary understanding of the structure, performance, installation, debugging and maintenance of the circuit breaker and the mechanism, record the operation problems, and notify the manufacturer if necessary.

6. Frequent operation places should be strictly controlled within the range of operation times and switching times specified in technical conditions, and should not continue to use beyond the service life.