Basic Info.
Model NO.
ZW20
Transport Package
Export Box
Trademark
DGG
Origin
China
HS Code
8504311000
Production Capacity
100000PCS/Year
Product Description
General
Zw20-12F series outdoor high-voltage AC boundary vacuum circuit breaker (hereinafter referred to as "boundary circuit breaker") is an outdoor high-voltage switch with three-phase AC 50Hz and a rated voltage of 12kV. It is mainly composed of a vacuum circuit breaker body, distribution automation feeder terminal, voltage transformer, control cable, etc. The circuit breaker body is equipped with a vacuum arc extinguishing chamber, a current transformer, a zero-sequence current transformer, and other components.
The boundary breaker has a remote management mode, and the protection control function and communication function can be reliably judged. The detection boundary is used for control and protection in substations, industrial and mining enterprises, and urban and rural power grids. It is especially suitable for places requiring frequent operation and urban milliampere zero sequence current and interphase fault short circuit current, so as to automatically remove single-phase ground fault and interphase short circuit fault.
The boundary breaker adopts a vacuum arc extinguishing and SF6 gas-insulated box, which adopts foreign advanced gas sealing and is explosion-proof. The overall sealing performance of insulation structure technology is excellent. Its spring operating mechanism adopts a miniaturized design, which has excellent performance and is far more reliable than the domestic traditional spring operating mechanism.
The boundary breaker shall comply with the technical standards such as High Voltage AC Circuit Breaker (GB/T1984214), High Voltage Clearing Circuit Breaker (DL/T402-2016), Technical Conditions for Ordering 12kV 40.5kV High Voltage Vacuum Circuit Breaker (DL/T403-2000) and Remote Terminal of Distribution Automation System (DL/T721-2013).
Model And Meaning
Technical specification
Zw20-12F series outdoor high-voltage AC boundary vacuum circuit breaker (hereinafter referred to as "boundary circuit breaker") is an outdoor high-voltage switch with three-phase AC 50Hz and a rated voltage of 12kV. It is mainly composed of a vacuum circuit breaker body, distribution automation feeder terminal, voltage transformer, control cable, etc. The circuit breaker body is equipped with a vacuum arc extinguishing chamber, a current transformer, a zero-sequence current transformer, and other components.
The boundary breaker has a remote management mode, and the protection control function and communication function can be reliably judged. The detection boundary is used for control and protection in substations, industrial and mining enterprises, and urban and rural power grids. It is especially suitable for places requiring frequent operation and urban milliampere zero sequence current and interphase fault short circuit current, so as to automatically remove single-phase ground fault and interphase short circuit fault.
The boundary breaker adopts a vacuum arc extinguishing and SF6 gas-insulated box, which adopts foreign advanced gas sealing and is explosion-proof. The overall sealing performance of insulation structure technology is excellent. Its spring operating mechanism adopts a miniaturized design, which has excellent performance and is far more reliable than the domestic traditional spring operating mechanism.
The boundary breaker shall comply with the technical standards such as High Voltage AC Circuit Breaker (GB/T1984214), High Voltage Clearing Circuit Breaker (DL/T402-2016), Technical Conditions for Ordering 12kV 40.5kV High Voltage Vacuum Circuit Breaker (DL/T403-2000) and Remote Terminal of Distribution Automation System (DL/T721-2013).
Model And Meaning
Technical specification
| Technical specification | |||||
| No. | Item | Unit | Data | ||
| 1 | Rated frequency | Hz | 50 | ||
| 2 | Rated voltage | kV | 12 | ||
| 3 | Rated current | A | 630 | 1250 | |
| 4 | Rated short-time power frequency withstand voltage | Interphase, to earth(wet) | kV/min | 34/1 | |
| Interphase, to earth(dry) | 42/1 | ||||
| Break(dry) | 48/1 | ||||
| Secondary circuit to earth | 2/1 | ||||
| 5 | Rated lightning impulse withstand voltage | Interphase, to earth | kV | 75 | |
| Break | 85 | ||||
| 6 | Rated short-circuit breaking current(virtual value) | kA | 20 | 25 | |
| 7 | Rated short-circuit making a current(peak) | 50 | 63 | ||
| 8 | Rated short-time withstand current and duration | kA/s | 20/4 | 25/4 | |
| 9 | Rated peak withstand current | kA | 50 | 63 | |
| 10 | Rated short-circuit breaking current breaking times | Times | 30(E2) | ||
| 11 | SF6 gas-rated gage pressure | MPa | 0 | ||
| 12 | Main circuit resistance | μΩ | ≤120 | ||
| 13 | Rated operating voltage and rated voltage of the auxiliary circuit | V | AC/DC220,DC48,DC24 | ||
| 14 | Mechanical life | Times | 10000(M2) | ||
| Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate. | |||||