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FZW-40.5
Fenarro
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The FZW-40.5/1250-25 Outdoor High Voltage Isolating Vacuum Load Break Switch is a new generation power distribution device independently developed and pioneered by our company. Designed according to GB3804 and IEC standards, it has successfully passed rigorous type tests and long-term operation verification. This switch is suitable for 40.5kV, 50Hz power distribution networks, capable of breaking load current, overhead line current, cable line current, and capacitor bank current.
The FZW-40.5 vacuum load break switch is widely applied in:
Urban and rural distribution networks
Railway power supply systems
Petrochemical industry
Overhead line switching and sectionalizing
High breaking capacity – reliable interruption of load and capacitor currents.
Strong safety performance – compliance with GB and IEC standards.
Long electrical and mechanical life – up to 10,000 operations.
Multi-functionality – suitable for isolation, sectionalizing, and switching.
Low maintenance – robust design reduces inspection frequency.
| Serial No. | Name | Unit | Data |
|---|---|---|---|
| 1 | Rated Voltage | kV | 40.5 |
| 2 | Rated Frequency | Hz | 50 |
| 3 | Rated Current | A | 1250 |
| 4 | Rated Active Load Breaking Current | A | 1250 |
| 5 | Rated Loop Breaking Current | A | 1250 |
| 6 | 5% Rated Active Load Opening Current | A | 62.5 |
| 7 | Rated Cable Charging Opening Current | A | 25 |
| 8 | 1min Power Frequency Withstand Voltage (Vacuum Chamber / Phase-to-phase, Phase-to-ground / Isolating Contacts) | kV | 68 / 95 / 110 |
| 9 | Lightning Impulse Withstand Voltage (Phase-to-phase, Phase-to-ground / Isolating Contacts) | kV | 185 / 215 |
| 10 | Rated Short-time Withstand Current (Thermal Stability) | kA | 25 |
| 11 | Rated Short-circuit Duration | s | 4 |
| 12 | Rated Peak Withstand Current (Dynamic Stability) | kA | 63 |
| 13 | Rated Short-circuit Making Current | kA | 63 |
| 14 | Mechanical Life | Times | 10,000 |
| 15 | Allowable Wear Thickness of Vacuum Arc Extinguishing Chamber Contacts | mm | 0.6 |
| 16 | Manual Operating Torque | Nm | ≤300 |
Q1: What is the main application of FZW-40.5 vacuum load break switch?
A1: It is mainly used for sectionalizing, isolating, and switching in 40.5kV outdoor distribution networks, ensuring reliable and safe power supply.
Q2: Can this load break switch handle capacitor bank switching?
A2: Yes, it is designed to reliably break capacitor group currents, overhead lines, and cable lines.
Q3: What are the advantages compared to traditional load switches?
A3: It offers higher breaking capacity, longer service life, stronger safety, and lower maintenance requirements.
Q4: What is its expected service life?
A4: The mechanical life is up to 10,000 operations, suitable for frequent switching.
Q5: In which industries can this switch be used?
A5: Widely used in urban/rural grids, railway power, petrochemical systems, and industrial power distribution.
