| Customization: | Available |
|---|---|
| Breaking Capacity: | High Voltage Circuit Breakers |
| Operation: | Electric Type |
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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 | EPD40.5/2500-31.5B | EPD40.5/2000-31.5B | EPD40.5/1600-31.5B | EPD40.5/1600-25B | EPD40.5/1250-25B | |
| Rated frequency | HZ | 50 | ||||
| Rated voltage | KV | 40.5 | ||||
| Short-time(1min) power-frequency withstand voltage | KV | 95 | ||||
| Lightning impulse withstand voltage (peak) | KV | 185 | ||||
| Part discharge | pC | ≤5 | ||||
| Rated current | A | 2500 | 2000 | 1600 | 1600 | 1250 |
| Rated short-circuit breaking current | KA | 31.5 | 31.5 | 31.5 | 25 | 25 |
| Rated short-time withstand current | KA | 31.5 | 31.5 | 31.5 | 25 | 25 |
| Rated peak withstand current | KA | 80 | 80 | 80 | 63 | 63 |
| Rated short-circuit making current | KA | 80 | 80 | 80 | 63 | 63 |
| 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 | ≤25 | ||||
| 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 | 2.9 | ||||
| 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 | 1.6±0.2 | ||||
| Average closing speed (last 6 mm) | m/s | 0.8±0.2 | ||||
| Contact bounce duration at clsoing operation | ms | ≤3 | ||||
| Clearance between open contacts | mm | 18±1 | ||||
| Out of simultaneity of contact closing and opening | ms | ≤2 | ||||
| Rated contact pressure | N | 3500+300 | 3500+300 | 3500+300 | 2500+300 | 2500+300 |
| Added external contact force at contact touch point | N | 2500+200 | 2500+200 | 2500+200 | 1800+200 | 1800+200 |
| Max. rebound during opening | mm | ≤3 | ||||
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