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ZW32-24 outdoor MV vacuum circuit breaker (Hereinafter referred to as the circuit breaker) is outdoor distribution equipment with rated voltage 24KV, three phase AC 50Hz. It is mainly used for breaking and closing the load current, overload current and short circuit current of power system. Applied to substation and industrial and mining enterprises in power system for protection and control use, more suitable for rural power grid and the frequent operation place.
Overview
ZW32-24 outdoor MV vacuum circuit breaker (Hereinafter referred to as the circuit breaker) is outdoor distribution equipment with rated voltage 24KV, three phase AC 50Hz. It is mainly used for breaking and closing the load current, overload current and short circuit current of power system. Applied to substation and industrial and mining enterprises in power system for protection and control use, more suitable for rural power grid and the frequent operation place.
Model Meaning
| ZW | 32 | 24 | 1 | T | 630 | 20 | G | □ | |||
| ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ||||
| Outdoor Vacuum Circuit Breaker | Design sequence number | Rated voltage(kV) | Ammunition handling mechanism | Rated current(A) | Rated short circuit breaking current(kA) | Tape isolation | S hand exercise Delectric exercise |
Quoted Standard
1. GB 1984-2003 AC high voltage circuit breaker
2. GB 3309-1989 Mechanical test of high voltage switchgear at room temperature
3. GB 5582-1993 The pollution level of insulating high voltage electric power equipment
4. GB 1985-2004 AC high voltage isolation switch and earthing switch
5. GB/T 11022-1999 Common technical requirement for high voltage switch equipment and control equipment standard
6. GB 16927.1-1997 The first part of high voltage test techniques: General test requirements
7. DL/T 402-2007 Technical conditions for AC high voltage circuit breaker order
8. DL/T 593-2006 The common technical specification of high voltage switch equipment and control equipment standards
Main Technical Parameters
| Rated voltage | kV | 24 | |||
| Rated insulation level | 1 min power frequency withstand voltage | Dry test | kV | 65/79(isolation fracture) | |
| Wet test | kV | 50/64(isolation fracture) | |||
| The auxiliary circuit and control circuit | kV | 2 | |||
| Lightning impulse withstand voltage (peak) | kV | 125/145(isolation fracture) | |||
| Rated frequency | Hz | 50 | |||
| Rated current | A | 6301250 | |||
| Rated operating sequence | O-0.3s-CO-180s-CO | ||||
| Rated short-circuit breaking current | kA | 16 20 | 25 | ||
| Rated short-circuit closing current(peak) | kA | 40 50 | 63 | ||
| Rated peak withstand current | kA | 40 50 | 63 | ||
| Rated short-time withstand current | kA | 16 20 | 25 | ||
| Rated short circuit duration | S | 4 | |||
| Rated short-circuit breaking current times | Times | 20/25 | |||
| Breaking Times of rated current | Times | 10000 | |||
| Closing time | ms | 20~80 | |||
| Under maximum operating voltage | ms | 20~80 | |||
| Opening time | Under rated operation voltage | ms | 20~80 | ||
| Under lowest operating voltage | ms | 20~80 | |||
| Full off time | Times | ≤100 | |||
| Mechanical life | J | 10000 | |||
| Switch on power | W | 70 | |||
| Energy storage motor rated input power | V | ≤70 | |||
| Rated operational voltage and auxiliary circuits rated voltage | V | DC,AC 220 | |||
| Energy storage time under rated voltage | S | ≤8 | |||
| Overcurrent release | Rated current | A | 5 | ||
| Tripping current accuracy | % | ±10 | |||
Circuit Breaker After Assembly And Adjustment Should Meet The Requirements Of Table 2
| ltem | Unit | Parameter |
| Open clearance between contacts | mm | 13±1 |
| Contact overtravel | mm | 3±1 |
| Average opening speed | m/s | 1.5±0.2 |
| Average closing speed | m/s | 0.8±0.2 |
| Contact closing bounce time | ms | ≤3 |
| Three-phase tripping over the same period of time | ms | ≤2 |
| DC resistance of circuit for every phase(with isolating switch) | μΩ | ≤60(150) |
| Allowable wear thickness for dynamic and static contact | mm | 3 |
| Phase center distance | mm | 380±1.5 |
| The closing state rated contact spring pressure | N | 2000±200 |
Circuit Breaker Equiped Isolation Switch Rated Parameters
| ltem | Unit | Parameter | |
| Rated voltage | KV | 24 | |
| Rated frequency | Hz | 50 | |
| Rated current | A | 1250 | |
| Rated peak withstand current | kA | 50 | |
| Rated short-time withstand current | kA | 20 | |
| Rated short circuit duration | S | 4 | |
| Mechanical life | Times | 2000 | |
| Isolation switch fracture operation torque | N*m | ≤300 | |
| Contact blade spring pressure | N | 300±30 | |
| Rated terminal static mechanical load | Horizontal longitudinal load | N | 500 |
| Horizontal transverse load | N | 250 | |
| Vertical force | N | 300 | |
Operating Conditions
1. Ambient air temperature: The daily temperature variation: -40℃ ~+40℃ diurnal variation of temperature less than 25℃;
2. Altitude: no more than 2000 meters
3. Wind speed is no more than 35m/s (equivalent to 700Pa on the surface of the cylindrical);
4. Ice cover thickness no more than 10mm;
5. The intensity of sunshine not more than 1000W/m ²
6. Pollution degree no more than GB 5582 IV class
7. Seismic intensity does not exceed 8 class
8. No flammable, explosive, chemical corrosion and severe vibration place
9. the conditions of use exceed the above-mentioned regulations, it shall be determined through consultation between the user and the manufacturer.
Overall And Mounting Dimensions (mm)
1. lower outlet
2. current transformer
3. Upper Inlet
4. Insulating pillar
5. The vacuum interrupter
6. wire guides
7. flexible connection
8. Insulated tension pole
9. actuator
10. case
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