ZN28-12 Indoor high voltage vacuum circuit breaker
ZN28-12 series indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz, rated voltage of 12kV indoor device, mainly installed in handcarts and fixed switchgear, for the protection and control of electrical equipment in power plants and substations of industrial and mining enterprises, and is suitable for frequent operation of places.
The circuit breaker is designed, manufactured and inspected according to GB1984-2014 and related standards.
ZN 28 - 12 / X - X
1 2 3 4 5
| 1:Indoor Vacuum Circuit Breaker |
| 5.Rated short-circuit interrupting current(kA) |
| Number |
Attribute |
Unit |
Data |
| 20KA |
25KA |
31.5KA |
40KA |
| 1 |
Rated voltage |
KV |
12 |
| 2 |
Rated current |
A |
63,010,001,250 |
12,501,600 |
1,250,160,020,002,500 |
160,020,025,003,150 |
| 3 |
Rated short-circuit interrupting current |
KA |
20 |
25 |
31.5 |
40 |
| 4 |
Rated short-circuit opening and closing current (peak) |
KA |
50 |
63 |
80 |
100 |
| 5 |
Rated peak withstand current |
KA |
50 |
63 |
80 |
100 |
| 6 |
4S rated short-time withstand current |
KA |
20 |
25 |
31.5 |
40 |
| 7 |
Rated insulation level |
1min power frequency withstand voltage |
KV |
To ground 42/break 48 |
| Lightning impulse withstand voltage (peak value) |
To ground 75/break 85 |
| 8 |
Rated sequence of operations |
|
Open-0.3s-Close-Open-180s-Close-Open |
| 9 |
Mechanical life |
times |
10000 |
| 10 |
Rated short-circuit breaking current breaking times |
times |
30 |
| 11 |
Rated closing voltage of actuator (DC) |
V |
220/110 |
| 12 |
Rated trip voltage of operating mechanism (DC) |
V |
220/110 |
| 13 |
Contact opening distance |
mm |
11±1 |
| 14 |
Overtravel (contact spring compression length) |
mm |
4±1 |
| 15 |
Different phases of three-pole closing and opening |
ms |
≤2 |
| 16 |
Contact closing bounce time |
ms |
≤2 |
Wenzhou Naisite Electric Co., Ltd is a technology oriented transmission and distribution equipment manufacturing enterprises, since its establishment in 2011, focus on transmission and distribution equipment technology progress, advocating technological innovation, introduce new energy prefabricated, a secondary fusion ring cage, environmental protection cabinet,Transformers, cable branch box, box type substation such as intelligent high and low voltage transmission and distribution equipment. Applicable to electric power, railway, petrochemical, subway, municipal construction, steel, coal and other industries. The company's products have achieved a number of technological breakthroughs in environmental protection, miniaturization, intelligence, maintenance free and other aspects. The headquarters of Wenzhou Naisi Electric Co., Ltd is located in the core area of Wenzhou Yueqing Economic Development Zone, "the capital of Electrical appliances in China". Has an excellent domestic intelligent distribution network products assembly line.
The company has a vacuum box helium leak detection system, local discharge test laboratory and other advanced inspection and test equipment system. With the basic experimental facilities and research environment needed for advanced technology development and scientific research, the products are tested according to the international IEC standards. The enterprise has passed the IS09001 quality system certification, IS014001 environmental system certification and OHSAS18001 occupational health and safety management system certification, the products have been obtained the CNAS national accreditation laboratory certification report.
| Q: Are you a trading company or manufacturer ? |
| A: 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 of China . |
| Q: Do you accept customized serveice ? |
| A: 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 . |
| Q:How long is your delivery lead time ? |
| A: It depends on your product requirement and quantity . Generally , 5~10 working days is available . |
| Q: How do you solve quality problems? |
| A: Please porvide detailed photoes of quality problems. our technical and quality testing department will analyse.we will make a satisfied soluton within 2 days. |
| Q: What is your payment terms ? |
| A: 30%T/T in advance,70% before shipment . West union , L/C are also acceptable . |
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