Outstanding Features Make You Stand Out
We play extreme caution to quality and utmost attention to detail, which makes our products so perfect.
We play extreme caution to quality and utmost attention to detail, which makes our products so perfect.
The main circuit unit and running product are coherent in interchangeability.
The operating mechanism can be separated from the whole circuit breaker for convenient and easy maintenance and fix.
No need of adjustment of driving unit; long-acting lubricating, reliable corrosion resistance, and high mechanical stability make low maintenance possible.
We apply German lubricating grease boasting lower starting torsion, stronger anti-aging and oxidation resistance.
Utilizing zinc-nickel alloy plating line with a German process to make sure our corrosion resistance is 5 to 7 times stronger than ordinary zinc-plating process.
This product can easily realize diverse arrangements and combinations to meet functions like expandability and control.
VBI-12 Indoor High Voltage Vacuum Circuit Breaker is three-phase AC 50Hz, rated voltage of 12KV indoor device, for industrial and mining enterprises, power plants and substations as electrical equipment control and protection purposes, and for frequent operation of the place.
a. VBI-12 indoor high-voltage vacuum circuit breaker equipped with intermediate sealed ceramic vacuum interrupter, the use of copper-chromium contact material, cup-like longitudinal magnetic field contact structure, the contact of the electric wear rate is small, long electrical life , The pressure level of the contact is high, the dielectric strength of the dielectric is stable, the arc is restored quickly, the cut-off level is low and the breaking ability is strong.
b. VBI-12 indoor high-voltage vacuum circuit breaker overall structure of the operating mechanism and the use of arc extinguishing system in the form of the main conductive circuit part of the three-phase floor structure, vacuum interrupter longitudinal installation of a tubular installation tube, The tube is made of epoxy resin using APG process, so it is particularly resistant to creeping. This structural design, greatly reducing the accumulation of dust and then the arc chamber surface, not only can prevent the vacuum interrupter by external factors damage, and can ensure that even in the hot and humid and serious pollution environment, the voltage effect can also show a high resistance state.
c. The operating mechanism for the layout of the spring energy storage mechanism, with manual energy storage and electric energy storage function, the operating mechanism placed in the chassis before the arc chamber, the chassis was divided into five middle partition five assembly space, In the meantime, the energy storage part, the transmission part, the tripping part and the buffer part of the operating mechanism are respectively installed. The VBI-12 vacuum circuit breaker will arrange the arc chamber and the operating mechanism to form a unified whole, that is, The structural design allows the operating performance of the operating mechanism to be more consistent with the required performance of the interrupter opening and closing, reducing unnecessary intermediate transmission links, reducing energy consumption and noise, making the operating performance of the VBI-12 circuit breaker more Reliable, VBI-12 circuit breaker can be loaded into the hand-car switchgear, can also be loaded into a fixed switchgear.
d. The circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard and low noise, and is suitable for the harsh working conditions such as frequent operation.
| NO. | Name | Unit | Data | |
| 1 | Rated voltage | KV | 12 | |
| 2 | Rated insulation level | 1min Power frequency withstand voltage | 42 | |
| Rated lightning impulse withstand voltage | 75 | |||
| 3 | Rated current | A | 630 1250 2000 3150 | |
| 4 | Rated short circuit breaking current | KA | 20 25 31.5 40 | |
| 5 | Rated short-circuit opening and closing current (peak) | 50 63 80 100 | ||
| 6 | Rated dynamic current (peak) | 50 63 80 100 | ||
| 7 | Rated thermal stability current (rms) | 20 25 31.5 40 | ||
| 8 | Rated short circuit current breaking times | time | 50 20 | |
| 9 | Rated thermal stability time | S | 4 | |
| 10 | Rated operating sequence | / | O-0.3S-CO-180S-CO | |
| 11 | Mechanical life | time | 10000 | |
| 12 | Rated single capacitor bank breaking current | A | 630 | |
| 13 | Rated back to back capacitor bank breaking current | 400 | ||
a. Ambient temperature is not greater than +40 ℃, not less than -10 ℃ (allow storage at -30 ℃);
b .altitude below 1000m;
c. Daily average daily relative humidity of not more than 95%, the monthly average of not more than 90%; saturated vapor pressure daily average of not more than 2.2 * 10-3MPa, the monthly average of not less than 1.8 * 10-2MPa, When the temperature drops sharply, it may condense;
d. earthquake intensity does not exceed 8;
e. No fire, explosion, serious pollution, chemical corrosion and severe vibration of the place.
Equip your business with long-lasting switchgear components that respond to your needs and smoothen electrical operations at affordable costs.
Since 2011, Liyond has been dedicated to designing and manufacturing reliable and superior switchgear components, whilst providing impactful solution to customers all over the world.
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