| Breaking Capacity: | High Voltage Circuit Breakers |
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| Operation: | Energy-storage Type |
| Speed: | Normal Type Circuit Breaker |
| Samples: |
customized
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| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier Summary
ZN28-12 and ZN28A-12 indoor HV vacuum circuit breaker applies to power system of rated voltage 12kV, three-phase AC 50/60Hz. it used to control and protect electric apparatus in industry like mining, substation and so on. ZN28-12 is a unitary type (operation mechanism is installed inside the switchgear and combine with it as a whole); ZN28A-12 is a hanging-on type (the mechanism and switchgear are separately installed on cubicle or support frame, then connected
with link rod and drive shaft.)
As long as the VCB operates within the required mechanical parameter, it can work with many advantages such as strong breaking capability, effective arcextinction, long lifetime, reliable and safe operation as well as easy maintenance.
The product conforms to IEC62271-100, GB/T1984, JB3855 and DL/T403.
Product feature
1. The vacuum arcing chamber of this VCB is of middle sealed-in longitudinal magnetic field type. The main shaft, opening
spring and buffer are all installed on the framework. There are 6 pieces of insulator switch fixed with stable and moving
trestles , then the vacuum arcing chamber are installed between the stable and moving trestles. The main shaft connects
with moving conducting bar of vacuum arcing chamber through crutch arm of insulating bar. Two pieces of insulation bars
connect two ends of stable and moving trestles to form a whole so as to improve the rigidity.
2. When the stable and moving contact open by the performance of operation mechanism, the arc in vacuum occur between contact, then extinct when the current reach at zero. Due to the special contact structure, during the arcing period, there is longitudinal magnetic field between contact so that arc lies evenly on the surface of contact and maintain a low arc voltage; in Vacuum arc-extinction chamber, the medium intensity recover at high speed, as well as small arc power and electrocorrosion ratio after arc extinction, thus to improve the breaking capability on short-circuit current and electric life.
3. The VCB applies to rigorous occasions such as high altitude and frequent operation.
4. As long as the VCB accord to the mechanical characteristics, the client may select adaptable electromagnet or spring
operation mechanism according to special situation.
1. Are you a trading company or manufacturer ?
We are a professional factory with 10 years experience in the field of High and low Voltage switchgears, Substation ,transformers,cable distribution box and various electrical equipment, such as vacuum circuit breaker , load break switch etc.
Our factory is the excellent supplier of State Grid Corporation od China .
2. Do you accept customized serveice ?
We offer OEM/ODM service , can print your logo on product . our professional technical and quotation team can provice a satisfied project according to your drawing and parameters .
3. What is your MOQ?
Our MOQ is 1 piece.
4. How long is your delivery lead time ?
It depends on your product requirement and quantity . Generally , 5~10 working days is avaliable .
5. How do you solve quality problems?
Please porvide detailed photoes of quality problems. our technical and quality testing department will analyse.we will make a satisfied soluton within 2 days .
6. What is your payment terms ?
30%T/T in adcance,70% before shipment . West union , L/C are also acceptable .
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Audited Supplier 
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