Outdoor Feeder Switching
The GPWF1-24/630 makes and breaks load and overload current in distribution networks. Its 630 A load breaking rating is separate from its 20 kA / 4 s short-time withstand rating.
GreenPower
GPWF1-24kVSF6 Outdoor Load Break Switch
Rated Voltage24 kV
Rated Current630 A
Short-Time Withstand Current20 kA / 4 s
Mechanical Endurance6,000 operations
Product Overview
GPWF1-24kV is a pole-mounted SF6 load break switch for 24 kV, 630 A distribution networks operating at 50 or 60 Hz. It switches load and overload current on outdoor feeders, with manual and motorized operation through a local or remote controller. The assembly includes a sealed gas tank, silicone rubber bushings, a gas pressure gauge and mechanical position indication.
Stainless-Steel Control Enclosure
The electronic controller is housed in a stainless-steel enclosure and connected to the switch tank by control and power cables. Manual, motorized, local and remote operation are supported.
Key Features
Sealed SF6 Switching Tank
SF6 provides insulation and arc quenching inside the sealed tank. The specified filling pressure is 0.07 MPa at 20°C.
Manual And Motorized Operation
The switch can be operated manually or by its 24 V DC drive. The controller provides local and remote operation for outdoor feeder switching.
Visible Position And Gas Pressure
The switch body includes open/close indication, a manual blocking device and a gas pressure gauge. Control-box lamps provide a separate status indication.
Technical Specifications
| Parameter | Data |
|---|---|
| Rated Voltage | 24 kV |
| Rated Current | 630 A |
| Rated Frequency | 50 / 60 Hz |
| Rated Load Breaking Current | 630 A |
| Rated Short-Time Withstand Current | 20 kA / 4 s |
| Peak Withstand Current | 50 kA |
| Rated Making Current (Peak) | 50 kA |
| Rated Making Operations | 3 operations |
| Rated Load Breaking Operations | At least 400 operations |
| Mechanical Endurance | 6,000 operations |
| Operating And Auxiliary Circuit Voltage | 24 V DC |
| Main Circuit Resistance Per Phase | Not exceeding 150 µΩ |
The load breaking rating is specified at 0.07 MPa SF6 pressure and 20°C. The short-time withstand and peak making ratings describe different duties and should be selected with the feeder protection scheme.
Insulation Levels
| Parameter | Data |
|---|---|
| 1-Minute Power-Frequency Withstand - Phase-To-Phase / Earth | 64 kV |
| 1-Minute Power-Frequency Withstand - Across Open Contacts | 79 kV |
| Lightning Impulse Withstand - Phase-To-Phase / Earth | 125 kV |
| Lightning Impulse Withstand - Across Open Contacts | 145 kV |
| Rain Withstand Voltage Test | 50 kV |
Rated insulation levels are listed at an SF6 gas pressure of 0.07 MPa and a temperature of 20°C.
Switching Duties
| Parameter | Data |
|---|---|
| Closed-Loop Breaking Current | 630 A |
| Active Load Breaking Current | 630 A |
| Cable Charging Breaking Current | 25 A |
| Line Charging Breaking Current | 16 A |
| No-Load Transformer Breaking Current | 21 A |
SF6 Gas And Pressure Protection
Gas Quality And Sealing
The annual relative SF6 leakage rate is specified at no more than 0.5%. Moisture limits are 150 ppm at factory delivery and 300 ppm in service.
Pressure Alarm And Relief
The manual lists a low-pressure lockout and alarm range of 0.02-0.04 MPa, and a high-pressure relief device operating range of 0.4-0.6 MPa. The normal rated operating pressure is 0.07 MPa.
Check the pressure gauge against the specified gas conditions and temperature-pressure curve before operation. Use the installation and operation manual for pressure checks and servicing.
Installation And Control Connections
Pole-Mounting Interfaces
The outline drawing shows 300 mm phase spacing and 650 × 390 mm base mounting centres. Confirm the support arrangement, pole fittings and terminal clearances using the final installation drawing.
Control And Position Indication
Specify the 24 V DC operating supply and the local/remote control connections. During commissioning, check that the mechanical open/close indication agrees with the control-box lamps.
The catalog includes outline dimensions, a secondary schematic and pole-mounting diagrams. Confirm the control-cable pin assignments and mounting hardware for the supplied assembly.
Service Conditions
Altitude
Not exceeding 3000 m above sea level.
Ambient Temperature
-40°C to +50°C, with a maximum daily temperature variation of 25°C.
Relative Humidity
Daily average not exceeding 95%; monthly average not exceeding 90%.
Wind And Seismic Conditions
Wind speed up to 34 m/s; seismic intensity not exceeding degree 8.
Ice, Snow And Sun
Ice thickness below 10 mm; snow thickness below 35 mm; solar irradiance below 0.1 W/cm².
Pollution And Installation Site
Pollution Class III or IV. The site must be free from fire and explosion hazards, serious chemical corrosion and frequent severe vibration.
Specify Your GPWF1-24kV Load Break Switch
Send the network frequency, site conditions and pole-mounting details. Include the control power source, local or remote operating requirements, and the control-cable and interface details needed for the feeder.