ZN73-12 type indoor high-voltage AC vacuum circuit breaker (hereinafter referred to as circuit breaker) is an indoor device with three-phase AC 50Hz and rated voltage of 12kV, which is suitable for throwing and cutting various loads of different nature and frequent operation, and can be used for protection and control of electrical facilities in industry, mine, enterprise, power plant equipment and substation. The circuit breaker conforms to national standards such as GB1984-2003, JB3855-2004, GB/T11022-1999 and other relevant regulations.
| Rated voltage kV |
12 |
| Rated frequency Hz |
50 |
| Mechanical life |
10000 |
| Model |
Rated current A |
Rated short-circuit breaking current kA |
Rated short-circuit closing current (peak) kA |
Rated short-circuit duration (s) |
Rated short-circuit breaking current breaking times |
| ZN73-12/630-20 |
630 |
20/25 |
50/63 |
4 |
50 |
| ZN73-12/1250-20 |
1250 |
| ZN73-12/1250-31.5 |
1250 |
31.5 |
80 |
| ZN73-12/1600-31.5 |
1600 |
| ZN73-12/2000-31.5 |
2000 |
| ZN73-12/2500-31.5 |
2500 |
| ZN73-12/1250-40 |
1250 |
40 |
100 |
| ZN73-12/1600-40 |
1600 |
| ZN73-12/2000-40 |
2000 |
| ZN73-12/2500-40 |
2500 |
| ZN73/3150-40 |
3150 |
· Power consumption is far below the national standard requirement
· High quality, withstand analysis
· Perfect appearance, feast for the eyes
· Longer mechanical and electrical life and better performance, greatly reducing maintenance costs for users
FAQ
Q: If I am interested in your MCB, when can I receive your quotation and details after sending the enquiry?
A: All your inquiries will be answered within 8 hours.
Q: Can I get samples before placing an order? Because I really don't know if your company's products are of good quality or not.
A: Certainly! We also believe that sample orders are the best way to prove quality. Welcome to inquire about the products you want
Q: What are your terms of trade?
A: We accept exw, fob, cif, fca, etc.
Q: How long is the delivery time?
A: Sample order usually takes 3-5 working days, formal order usually takes 10-20 days.
Q: how to solve the quality problems after sales?
A: Take photos of the quality problems and send to us for our checking and confirming,we'll make a satisfied solution for you whin 3 days
Audited Supplier 
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