Description
ZW32-12/24 Series outdoor column high-voltage vacuum circuit breaker is rated voltage 12 / 24kV, three-phase AC 50Hz outdoor high voltage switchgear equipment, mainly used for breaking, closing load current and short circuit current of the power system for substations, industrial and mining enterprises and urban and rural distribution network for the protection and control, especially for frequent operation place and urban and rural distribution network automation.
The product is the latest international design and epoxy encapsulated silicone rubber insulation APG technology and precision machining technology, technical compliance with IEC56 standard,maintenance-free, small size, light weight, intelligence, high reliability and appearance, etc., the technical level of the leading domestic position.
ZW32-12/24 The main circuit breaker integrated by a solid letters column, current transformers, spring mechanism and base composition. Spring operating mechanism and pole fixed to the base, integrated solid seal pole, current transformer, sealing structure between the spring mechanism to adapt to the outdoor environment. It is compact shape, nice, concise structure, easy installation, and installation without having to adjust to meet the interrupter open distance and overtravel requirements.
The circuit breaker is also reserved for auxiliary switch contacts, fully meet the needs of different users. In order to meet customer needs, but also the addition of a clear fracture isolation switch isolation, have reliable mechanical interlock between the circuit breaker and, when not needed, isolation switch disassembly simple and convenient.
Specifications
Technical parameters of the circuit breaker
No. | Item | Unit | Parameters | |
1 | Rated voltage | kV | 12 | 24 |
2 | Rated frequency | Hz | 50 | |
3 | Rated current | A | 630 | 1250 |
4 | Rated short circuit breaking current | kA | 20 | 25 |
5 | Rated peak withstand current (peak) | kA | 50 | 63 |
6 | Rated short time withstand current / duration | kA/s | 20/4 | 25/4 |
7 | Rated short-circuit current (peak) | kA | 50 | 63 |
8 | Rated operating sequence | O-0.3s-CO-180s-CO | ||
9 | Mechanical life | time | Circuit Breaker 10000 | |
Disconnector 20000 | ||||
10 | Rated current breaking times | time | 10000 | |
11 | Rated short-circuit breaking current breaking times | time | 30 | |
12 | Power frequency withstand voltage (1min):( wet) phase-to-ground (dry), phases, / fracture | kV | 34/42/49 | 50/65/79 |
13 | Lightning impulse withstand voltage (peak:phase-to-ground (dry), phases, / fracture | kV | 75/85 | 125/145 |
14 | Secondary circuit 1min power frequency withstand voltage | V | 2000 | |
15 | weight | kg | =< 100 | =< 150 |
Mechanical parameters
No. | Item | Unit | 12kV | 24kV | ||
1 | Open contacts | mm | 9 ± 1 | 12 ± 1 | ||
2 | Contact Overtravel | mm | 2 (0 / +1) | 3(0/+1) | ||
3 | Opening speed | m / s | 1.2±0.2 | 1.4±0.3 | ||
4 | Closing speed | m / s | 0.65±0.2 | 0.7±0.2 | ||
5 | Contact closing bounce time | ms | =< 3 | |||
6 | White center distance | mm | 280±2 | 340±2 | 380±2 | |
7 | Three-phase closing different period | ms | =< 2 | |||
8 | Breaker loop resistance | µ Ω | < 80 | |||
9 | Closing time | ms | 25 – 60 | |||
10 | Opening time | ms | 18 – 45 | |||
11 | Energy storage motor rated power | W | 40 | 70 |