EnglishEnglish  |
FKW18(17)-12(40.5)
Fenarro
| Quantity: | |
|---|---|
The FKW18(17)-12(40.5) Outdoor AC High Voltage Load Break Switch is a new generation switch designed by integrating domestic manufacturing experience with advanced foreign technology.
It consists of isolating blades, an arc-extinguishing chamber, and an operating mechanism. Using a gas-producing arc-quenching principle, it features strong arc-extinguishing capability, high insulation reliability, simple structure, and minimal maintenance.
Its overall performance meets the advanced level of similar international products.
Medium-voltage distribution networks – for breaking and closing load current
Substations & industrial power systems – switching and protection
Overhead line systems – sectionalizing and isolation
Rural & urban power grids – reliable distribution switching
Light-load applications – breaking and closing no-load lines or transformers
Wide Voltage Range – Suitable for 12kV to 40.5kV systems.
Advanced Arc-Extinguishing Technology – Uses gas-producing arc-quenching principle for safe and effective switching.
Simple & Robust Design – Minimal maintenance, easy operation.
High Insulation Reliability – Provides safe isolation distance when in open position.
Strong Environmental Adaptability – Designed for harsh outdoor conditions.
International Standards Compliance – Performance reaches the advanced level of similar global products.
Altitude: ≤3000m
Ambient Temperature: -25℃ ~ +40℃ (daily temperature difference ≤32K)
Wind Pressure: ≤700Pa (≈34m/s wind speed)
Pollution Level: IV class allowable
Seismic Intensity: ≤8 degrees
Icing Thickness: ≤10mm
| Serial No. | Item | Unit | Technical Parameter |
|---|---|---|---|
| 1 | Rated Voltage | kV | 12 / 40.5 |
| 2 | Rated Current | A | 630 |
| 3 | Rated Frequency | Hz | 50 |
| 4 | Rated Peak Withstand Current | kA | 50 |
| 5 | Rated Short-time Withstand Current | kA | 20 |
| 6 | Rated Short-circuit Duration | s | 4 |
| 7 | Rated Active Load Breaking Current | A | 630 |
| 8 | Rated Loop Breaking Current | A | 630 |
| 9 | Rated Cable Charging Current | A | 10 |
| 10 | 5% Rated Active Load Opening Current | A | 31.5 |
| 11 | Rated Transformer No-load Breaking Current | A | No-load current of 1250kVA transformer |
| 12 | Rated Short-circuit Making Current | kA | 50 |
| 13 | Main Circuit Resistance | μΩ | ≤95 |
| 14 | 1min Power Frequency Withstand Voltage (RMS Value) | kV | |
| Dry-type: Phase-to-phase, Phase-to-ground | kV | 42 / 95 | |
| Dry-type: Isolating Contacts | kV | 49 / 115 | |
| Wet-type: Phase-to-phase, Phase-to-ground | kV | 30 / 85 | |
| 15 | Lightning Impulse Withstand Voltage (Peak Value) | kV | |
| Phase-to-phase, Phase-to-ground | kV | 75 / 185 | |
| Isolating Contacts | kV | 85 / 215 | |
| 16 | Mechanical Life | Times | 2000 |
| 17 | Asynchronism of Three-pole Closing and Opening | ms | ≤5 |
| 18 | Motor Voltage and Power | V/W | ~220 / 200 |
| 19 | Deviation of Contact Knife Position | mm | ≤2 |
| 20 | Main Contact Pressure | N | 420 ± 42 |
| 21 | Contact Knife Opening Force | Nm | ≥200, ≥360 |
| 22 | Rated Operating Torque | Nm | ≤300 |
Q1: What voltage levels are supported by the FKW18 series?
A1: It supports 12kV to 40.5kV three-phase AC systems.
Q2: What is the arc-extinguishing principle used?
A2: It adopts a gas-producing arc-quenching principle, ensuring strong arc-extinguishing capability.
Q3: What are its typical applications?
A3: It is used for load breaking, closing, isolation, and sectionalizing in distribution networks, substations, and industrial systems.
Q4: Can it operate under severe outdoor conditions?
A4: Yes, it is designed for harsh environments with high wind, pollution, and icing resistance.
Q5: Does it provide visible isolation?
A5: Yes, in the open position, it provides a clear safety distance equivalent to an isolating switch.
