Henan Energy Electric Equipment Co., Ltd. was established in 2011 and is an excellent and reliable power equipment manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations, high-voltage switches, and medium and low voltage complete sets of equipment. The equipment put into production and operation of the project advocates energy saving, intelligence, informatization, and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center, with 71 utility model patents and 15 invention patents. With years of accumulation in the transformer industry and strong technological innovation capabilities, HZEC products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa, and other regions, covering more than 40 countries.
The epoxy embedded pole (also known as embedded type vacuum arc extinguishing chamber) is a buffer material outside the vacuum switch tube and then a layer of epoxy resin. It replaces the insulation support and mechanical support of the original circuit breaker, greatly reducing the circuit breaker's parts and volume. With small size, more stable and reliable pressure advantages, it realizes the integrated module, and more easy for installation and free-maintenance.
Adopting of the excellent performance epoxy resin material, it greatly ensures the products' mechanical, electrical and thermal aging performance. It is reliable and with good resistance to high and low temperature shock and mechanical shock resistance. It has the advantage of maintenance free, compact, easy to install. Epoxy solid sealed pole matching the corresponding indoor and outdoor vacuum circuit breaker or a vacuum distribution device, especially matching in frequency is 50Hz / 60Hz, rated voltage of 12kV, 17.5kV, 24kV, 27.5 kV and 40.5 kV electric power, machinery, chemical industry, metallurgy, mining and other departments operating condition operating frequently places.
| Technical Data |
EPD24/3150-31.5 |
| Rated frequency |
HZ |
50 |
| Rated voltage |
KV |
24 |
| Short-time(1min) power-frequency withstand voltage |
KV |
65/79 |
| Lightning impulse withstand voltage (peak) |
KV |
125/145 |
| Part discharge |
pC |
≤2 |
| Rated current |
A |
3150 |
| Rated short-circuit breaking current |
KA |
31.5 |
| Rated short-time withstand current |
KA |
31.5 |
| Rated peak withstand current |
KA |
80 |
| Rated short-circuit making current |
KA |
80 |
| Rated single capacitor bank breaking current |
A |
630 |
| Rated back-to-back capacitor bank breaking current |
A |
400 |
| Rated duration of short-circuit |
S |
4 |
| Circuit Resistance at Min. Rated contact force |
UΩ |
≤16 |
| Contact closed force due to bellows and atmosphere |
N |
210±45 |
| Counterforce of contact at full stroke |
N |
300±50 |
| Mass of moving parts |
KG |
3.9 |
| Mechanical endurance |
Operations |
10000 |
| Contact limit erosion |
mm |
3 |
| Switching operation of rated short-circuit breaking current |
Operations |
30 |
| Shelf life |
Years |
20 |
| Internal gas pressure |
Pa |
<1.33x10-3 |
| Average opening speed (first 6 mm) |
m/s |
1.4±0.2 |
| Average closing speed (last 6 mm) |
m/s |
0.8±0.2 |
| Contact bounce duration at clsoing operation |
ms |
≤2 |
| Clearance between open contacts |
mm |
13±1 |
| Out of simultaneity of contact closing and opening |
ms |
≤1 |
| Rated contact pressure |
N |
3500+300 |
| Added external contact force at contact touch point |
N |
2500+200 |
| Max. rebound during opening |
mm |
≤2 |
The product meets the use below the altitude of 3000m.
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