12~40.5KV Circuit Breaker Embedded Poles
Overview
The 12-40.5kV sealed pole for circuit breakers is a key component used in medium and high voltage circuit breakers, mainly used for isolation and arc extinguishing. The sealed pole uses solid insulating materials (such as epoxy resin) to encapsulate the conductive part and arc extinguishing chamber of the circuit breaker together. It has high insulation, weather resistance and mechanical strength, and is suitable for power systems with voltage levels of 12kV to 40.5kV.
Main features
★High insulation performance:
The sealed pole uses solid insulating materials such as epoxy resin, which has excellent insulation performance and can effectively prevent the influence of the external environment (such as humidity, dust, etc.) on the equipment.
★Compact design:
The sealed pole integrates the conductive part and the arc extinguishing chamber, with a compact structure, which reduces the volume and weight of the equipment and is easy to install and maintain.
★High reliability:
The solid insulating material has good aging resistance and weather resistance, can operate stably for a long time in harsh environments, and reduce the failure rate.
★Environmental protection:
The sealed pole does not use SF6 gas, avoids the emission of greenhouse gases, and meets environmental protection requirements.
★Maintenance-free:
Due to the use of solid insulating materials, the sealed poles require almost no maintenance, reducing operating costs.
Application scenarios
The sealed poles are widely used in the following fields:
★Substations: used in distribution systems with voltage levels of 12kV to 40.5kV.
★Industrial power systems: suitable for power protection in industrial sites such as factories and mines.
★Urban distribution networks: used for power distribution and protection of urban power grids.
★New energy fields: protection of new energy power generation systems such as wind farms and photovoltaic power stations.
Technical Parameter
| 12KV: EP12-630-25,EP12/1250-25, EP12/1250-31.5 | |
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| parameter name | parameter |
| Rated voltage | 12kV |
| Rated current | 630/1250A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 48kV |
| Rated lightning impulse withstand voltage | 85kV |
| Rated short-circuit breaking current | 25/31.5kA |
| Rated peak withstand current | 63/80KA |
| Rated short-circuit making current (peak value) | 63/80KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short-time withstand current | 25/31.5kA |
| Mechanical life | 30000 times |
| Contact self-closing force | 100±30N |
| Contact reaction force at rated opening distance | 200±30N |
| Loop resistance at lower limit of rated working pressure | ≤25μ Ω |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | ≤2.5kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 9±1mm |
| Rated contact travel | 4±1mm |
| Average opening speed | 1.1±0.2m/s |
| Average closing speed | 0.6±0.2m/s |
| Rated contact pressure | 2000±200N |
| Contact closing bounce time | ≤2ms |
| Contact opening rebound amplitude | ≤2mm |
| Different phases of opening and closing of contacts | ≤1ms |
Note: * is the rated value provided upon request
| 24KV: EP24/1250-31.5, EP24/1600-31.5 | |
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| parameter name | parameter |
| Rated voltage | 24kV |
| Rated current | 1250/1600A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 65/79kV |
| Rated lightning impulse withstand voltage | 125kV |
| Rated short-circuit breaking current | 31.5kA |
| Rated peak withstand current | 80KA |
| Rated short-circuit making current (peak value) | 80KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short-time withstand current | 31.5kA |
| Mechanical life | 30000 times |
| Contact self-closing force | 100±30N |
| Contact reaction force at rated opening distance | 200±30N |
| Loop resistance at lower limit of rated working pressure | ≤25μΩ |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | ≤2kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 12±1mm |
| Rated contact travel | 4±1mm |
| Average opening speed | 1.1±0.2m/s |
| Average closing speed | 0.8±0.2m/s |
| Rated contact pressure | 2500±200N |
| Contact closing bounce time | ≤2ms |
| Contact opening rebound amplitude | ≤2mm |
| Different phases of opening and closing of contacts | ≤2ms |
Note: * is the rated value provided upon request
| 24KV: EP24/630-20, EP24/1250-25 | |
 |
 |
| parameter name | parameter |
| Rated voltage | 24kV |
| Rated current | 630/1250A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 65/79kV |
| Rated lightning impulse withstand voltage | 125kV |
| Rated short-circuit breaking current | 20/25kA |
| Rated peak withstand current | 50/63KA |
| Rated short-circuit making current (peak value) | 50/63KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short-time withstand current | 25/31.5kA |
| Mechanical life | 30000 times |
| Contact self-closing force | 100±30N |
| Contact reaction force at rated opening distance | 200±30N |
| Loop resistance at lower limit of rated working pressure | ≤25μΩ |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | ≤2kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 13±1mm |
| Rated contact travel | 4±1mm |
| Average opening speed | 1.1±0.2m/s |
| Average closing speed | 0.8±0.2m/s |
| Rated contact pressure | 2400±200N |
| Contact closing bounce time | ≤2ms |
| Contact opening rebound amplitude | ≤2mm |
| Different phases of opening and closing of contacts | ≤2ms |
Note: * is the rated value provided upon request
| 24KV: EP24/2000-31.5 | |
 |
 |
| parameter name | parameter |
| Rated voltage | 24kV |
| Rated current | 2000A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 65kV |
| Rated lightning impulse withstand voltage | 125kV |
| Rated short-circuit breaking current | 31.5kA |
| Rated peak withstand current | 80KA |
| Rated short-circuit making current (peak value) | 80KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short circuit duration | 4S |
| Mechanical life | 10000 times |
| Contact self-closing force | 200±30N |
| Contact reaction force at rated opening distance | 320±30N |
| Loop resistance at lower limit of rated working pressure | ≤25μΩ |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | 3.8±0.3 Kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 13±1mm |
| Average opening speed | 1.4±0.2m/s |
| Average closing speed | 0.8±0.2m/s |
| Rated contact pressure | 3200±300N |
| Contact closing bounce time | ≤2ms |
| Contact opening rebound amplitude | ≤2mm |
Note: * is the rated value provided upon request
| 40.5KV: EP40.5/1600-25, EP40.5/2000-25, EP40.5/1600-31.5, EP40.5/2000-31.5 | |
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| parameter name | parameter |
| Rated voltage | 40.5kV |
| Rated current | 1600/2000A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 95kV |
| Rated lightning impulse withstand voltage | 185kV |
| Rated short-circuit breaking current | 25/31.5kA |
| Rated peak withstand current | 80KA |
| Rated short-circuit making current (peak value) | 80KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short-time withstand current | 25/31.5kA |
| Mechanical life | 10000 times |
| Contact self-closing force | 250±60N |
| Contact reaction force at rated opening distance | 340±60N |
| Loop resistance at lower limit of rated working pressure | ≤25μ Ω |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | ≤1.7kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 18±1mm |
| Rated contact travel | 4±1mm |
| Average opening speed | 1.7±0.2m/s |
| Average closing speed | 0.8±0.2m/s |
| Rated contact pressure | 3200±200N |
| Contact closing bounce time | ≤3ms |
| Contact opening rebound amplitude | ≤2mm |
| Different phases of opening and closing of contacts | ≤1ms |
Note: * is the rated value provided upon request
| 40.5KV: EP40.5/1250-31.5 | |
 |
 |
| parameter name | parameter |
| Rated voltage | 40.5kV |
| Rated current | 1250A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 95kV |
| Rated lightning impulse withstand voltage | 185kV |
| Rated short-circuit breaking current | 31.5kA |
| Rated peak withstand current | 80KA |
| Rated short-circuit making current (peak value) | 80KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short circuit duration | 4S |
| Mechanical life | 10000 times |
| Contact self-closing force | 110±40N |
| Contact reaction force at rated opening distance | 210±40N |
| Loop resistance at lower limit of rated working pressure | ≤25μ Ω |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | 6.8±0.3 Kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 18±1mm |
| Average opening speed | 1.7±0.3m/s |
| Average closing speed | 1.3±0.2m/s |
| Rated contact pressure | 3500±300N |
| Contact closing bounce time | ≤3ms |
| Contact opening rebound amplitude | ≤3mm |
Note: * is the rated value provided upon request
| 40.5KV: EP40.5/2500-31.5 | |
 |
 |
| parameter name | parameter |
| Rated voltage | 40.5kV |
| Rated current | 2500A |
| Rated frequency | 50Hz |
| Rated short-duration power frequency withstand voltage (1min) | 95kV |
| Rated lightning impulse withstand voltage | 185kV |
| Rated short-circuit breaking current | 31.5kA |
| Rated peak withstand current | 80KA |
| Rated short-circuit making current (peak value) | 80KA |
| Rated short-circuit breaking current breaking times | 30 times |
| Rated back-to-back capacitor bank breaking current* | 400A |
| Rated single capacitor bank breaking current* | 630A |
| Rated short circuit duration | 4S |
| Mechanical life | 10000 times |
| Contact self-closing force | 200±40N |
| Contact reaction force at rated opening distance | 400±40N |
| Loop resistance at lower limit of rated working pressure | ≤25μ Ω |
| Storage period | 20 years |
| Contact allowable wear thickness | 3mm |
| Moving part weight | 7.8±0.3 Kg |
Mechanical parameters of the matched vacuum switch
| parameter name | parameter |
| Contact distance | 18±1mm |
| Average opening speed | 1.7±0.3m/s |
| Average closing speed | 1.3±0.2m/s |
| Rated contact pressure | 3500±300N |
| Contact closing bounce time | ≤3ms |
| Contact opening rebound amplitude | ≤3mm |
Note: * is the rated value provided upon request
Advantages
★High safety: Solid insulation materials avoid the risk of gas leakage and improve the safety of equipment.
★Long life: The design life of the sealed pole can usually reach more than 20 years.
★Strong adaptability: Suitable for various complex environments, such as high altitude, high humidity, high pollution, etc.
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Contact us
If you need to contact us for more information, support, or inquiries, please use the following details:pannie@hdswitchgear.com.
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