GW5-12 Outdoor Double Post Horizontal Rotation Disconnector 12kV 40.5kV 72.5kV 126kV High Voltage Switchgear

Product Overview

The GW5 is a double-post V-type horizontal-rotation outdoor disconnector for three-phase 50 Hz networks, isolating lines and equipment with a clearly visible break of about 90°. It cannot break load or short-circuit current and is used together with a circuit breaker. Each pole carries two support-post insulators at a 50° included angle on a common base, driven by a manual or motorised mechanism through a three-phase linkage; pollution-proof insulators suit heavily polluted sites. The catalogue outline table covers 40.5, 72.5 and 126 kV, and electrical ratings follow the technical agreement.

Product Display

GW5 Outdoor Double-Post V-Type Horizontal-Rotation High-Voltage Disconnector - display

GW5 Outdoor Double-Post V-Type Horizontal-Rotation High-Voltage Disconnector - poster_display

Model Designation

GW5 Outdoor Double-Post V-Type Horizontal-Rotation High-Voltage Disconnector - model

Model format: G W 5 -12 / □ □

G — disconnector
W — place of use: outdoor
5 — design sequence number
12 — rated voltage, kV (designation example; the catalogue outline table covers 40.5 / 72.5 / 126 kV)
□ — rated current, A
□ — rated short-circuit withstand current, kA

Service Conditions

Altitude: 1000 to 3000 m
Ambient temperature: not above +40 ℃ and not below −30 ℃ (−40 ℃ for cold areas)
Wind pressure: not exceeding force 8
Seismic intensity: not above intensity 8
No frequent violent vibration at the installation site
General type: site free from gases, vapours, chemical deposits, salt mist, dust or other explosive or corrosive substances that seriously affect insulation and conductivity
Pollution-proof type: suitable for heavily polluted areas, free from substances that may cause fire or explosion

Construction

Each pole is built from a base, two support-post insulators, outgoing terminals and contacts that form the main conducting circuit. The two insulators stand perpendicular to the base on bearings at its ends, set at a 50° included angle, and carry the conducting part above them, which rotates through about 90° with the posts to open or close the circuit with a wide, clearly visible break; contact pressure is maintained by self-cleaning finger contacts.

The poles are coupled by a three-phase linkage and driven by a manual or motorised operating mechanism, with open / close position indication on the motorised version. Extended-creepage pollution-proof insulators are offered for severely polluted coastal and industrial regions to prevent pollution flashover, and because the disconnector cannot break load or short-circuit current it is always used together with a circuit breaker.

Technical Data

Item	Value	Remark
Network	Three-phase AC, 50 Hz	—
Rated voltage	40.5 / 72.5 / 126 kV	Range covered by the catalogue outline dimension table; the designation example shows GW5-12
Rated current	Fixed by technical agreement	Follows the equipment nameplate
Rated short-time withstand current	Fixed by technical agreement	Follows the equipment nameplate
Rated peak withstand current	Fixed by technical agreement	Follows the equipment nameplate
Power-frequency / lightning impulse withstand voltage	Fixed by technical agreement	Follows the equipment nameplate
Post included angle / rotation	50° / about 90°	Double-post V-type, clearly visible break
Operating mechanism	Manual or motorised	Three-phase linkage; position indication on motorised version

Selection note: Choose the rated voltage — 40.5, 72.5 or 126 kV — to match the network; phase spacing and pole height increase with voltage. Specify the rated current and the withstand ratings against the feeder duty; they are fixed by the technical agreement. Select manual or motorised operation (the motorised mechanism gives remote operation with position indication), and for heavily polluted sites order the pollution-proof version with extended-creepage insulators.

Standards

The source catalogue pages for the GW5 name no specific product standard. The series is rated for three-phase AC 50 Hz networks, and rated current, rated short-time withstand current, rated peak withstand current and the power-frequency / lightning-impulse withstand voltages are all fixed by the order technical agreement and follow the equipment nameplate; the outline dimension table covers 40.5, 72.5 and 126 kV.

Technical note: The catalogue page is internally inconsistent on voltage: the type designation shows GW5-12 while the rated-parameter text and outline table cover 40.5 / 72.5 / 126 kV. Dimension values are reproduced from the manufacturer outline table and are for foundation preparation only; confirm the certified dimensional drawing and all electrical ratings against the technical agreement and nameplate before ordering and installing.

Installation & Dimensions

Installation Diagram

GW5 Outdoor Double-Post V-Type Horizontal-Rotation High-Voltage Disconnector - installation

Assemble the V-type poles on the common frame at the specified phase spacing (A), fix each base through the four Φ20 mounting holes on the C / D span, and couple the poles to the operating mechanism with the three-phase linkage shaft. All dimensions are in mm: A = phase spacing, A1 = V opening width, H = height, E = mechanism-centre distance, C / D = base mounting-hole span. Keep at least 1100 mm clear below the mechanism for the operator platform, allow the 500 mm terminal offset, verify free ~90° travel, correct contact seating and the full visible break before energising, and bond the bases to the earth grid.

No.	Rated voltage (kV)	A	A1	H	E	C	D
1	40.5	1200	1075	1070	1400	240	300
2	72.5	1600	1285	1295	2200	240	300
3	126	2000	1660	1695	3000	240	300

Safety notice: The GW5 has no load or short-circuit breaking capability and is an isolator only. When de-energising, open the circuit breaker before the disconnector; when energising, close the disconnector before the breaker. Interlock the disconnector with the circuit breaker so it cannot be operated under load, and earth the isolated section only after proving it dead.

FAQs

No. It is an isolator only: it opens and closes no-load circuits and provides a visible break for maintenance. Load and fault currents are cleared by the associated circuit breaker.

When de-energising, open the circuit breaker first and then the disconnector. When energising, close the disconnector first and then the circuit breaker.

Each pole uses two support-post insulators set at a 50° included angle on bearings at the ends of the base. The knife contacts on top rotate through about 90° with the posts to open or close the circuit, giving a wide, clearly visible break.

The outline dimension table covers 40.5 kV, 72.5 kV and 126 kV, while the type designation GW5-12 shows the format with the rated voltage in kV. Confirm the actual voltage of the ordered unit against the technical agreement and nameplate, since the catalogue page is inconsistent on this point.

Altitude 1000 to 3000 m, ambient temperature from −30 ℃ (−40 ℃ in cold areas) to +40 ℃, wind up to force 8, seismic intensity up to 8, and no frequent violent vibration. The general type needs a site free of corrosive or explosive substances; the pollution-proof type suits heavily polluted areas.

Yes. The poles can be driven by a motorised operating mechanism through the three-phase linkage, with open / close position indication. A manual mechanism is the standard option.

GW5 Outdoor Double-Post V-Type Horizontal-Rotation High-Voltage Disconnector