GW-15D Outdoor High Voltage Disconnector with Earthing Switch 15kV 40.5kV Single-Pole CS6 Mechanism

Product Overview

The GW□-15D is a single-pole outdoor high-voltage disconnector for opening and closing no-load circuits in 15 kV and 40.5 kV networks. Used together with circuit breakers, it provides a clearly visible insulating gap for the safe isolation of lines and equipment. On the earthing-switch (D) version the earthing knife is operated through the CS6 manual mechanism with a mechanical interlock that blocks misoperation, so portable earth leads are not needed. Three poles assemble side by side on a common galvanised base frame, and a pollution-proof version is available for heavily polluted areas.

Product Display

GW-15D Series Outdoor High-Voltage Disconnector with Earthing Switch - display

GW-15D Series Outdoor High-Voltage Disconnector with Earthing Switch - poster_display

Model Designation

GW-15D Series Outdoor High-Voltage Disconnector with Earthing Switch - model

Model format: G W□-15 (D)/□□

G — disconnector
W — place of use: outdoor
□ — design sequence number
15 — rated voltage, kV
(D) — with earthing switch (omitted for the plain version)
□□ — rated current, A, and rated short-circuit withstand current, kA

Service Conditions

Altitude: not above 3000 m
Ambient temperature: upper limit +40 ℃, lower limit −10 ℃ for general areas (−40 ℃ for cold areas)
Wind pressure: not exceeding force 8
Seismic intensity: not above intensity 8
No frequent violent vibration at the installation site
Standard 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 an independent single-pole unit carrying the knife, moving and static contacts, operating insulator and supporting porcelain insulators on a galvanised steel base; three poles are assembled side by side on the common mounting frame to form the three-phase set. A three-phase linkage shaft and bent arms drive all poles from one CS6 manual mechanism, and the side or centre operating bent arm with the pipe transmission arrangement lets the mechanism sit at a convenient height on the structure.

On the earthing-switch (D) version the earthing knife is driven through its own tie rods, and the mechanical interlock between main and earth contacts enforces the correct operating sequence, replacing portable earth leads during maintenance. For remote operation a motorised mechanism can be coupled through the three-phase linkage shaft, bent arms and pipe transmission with open / close position indication, and the pollution-proof version uses extended-creepage insulators for heavily polluted coastal and industrial areas.

Technical Data

Item	Value	Remark
Rated voltage	15 / 40.5 kV	Series designation covers both classes
Rated current	Fixed by technical agreement	The catalogue does not tabulate current ratings for this series
Rated short-circuit withstand current	Fixed by technical agreement	Final parameters follow the nameplate and shipped documents
Earthing switch (D version)	Earthing knife with mechanical interlock	Driven through its own tie rods from the CS6 mechanism
Operating mechanism	CS6 manual; motorised optional	Three-phase linkage, side or centre operating bent arm
Pollution-proof version	Extended-creepage insulators	For heavily polluted areas
Phase arrangement	Single poles on common galvanised frame	Three poles assembled side by side form the three-phase set

Selection note: Confirm the rated voltage — 15 kV or 40.5 kV — against the network; the rated current and withstand ratings are fixed by the order technical agreement. Select the plain version or the earthing-switch (D) version for the required earthing arrangement, decide between the CS6 manual mechanism and the motorised mechanism with position indication, order the pollution-proof version with extended-creepage insulators for heavily polluted sites, and confirm the mechanism position (side or centre operating bent arm) against the gantry layout.

Standards

The source catalogue for the GW□-15D series names no specific product standard and does not tabulate rated current or withstand ratings. All rating data are fixed by the technical agreement at order, and final parameters follow the nameplate and shipped documents; the disconnector is used in combination with a circuit breaker with which it must be electrically or mechanically interlocked.

Technical note: Catalogue values (outline dimensions and service conditions) are for selection guidance only; the technical agreement and the equipment nameplate govern the final electrical ratings of the shipped disconnector. Confirm the earthing-switch arrangement, mechanism position and insulation class on the certified drawings before installation.

Installation & Dimensions

Installation Diagram

GW-15D Series Outdoor High-Voltage Disconnector with Earthing Switch - installation

Assemble the single poles on the mounting frame at their phase spacing, fix the frame through the 4 × 18 × 25 mm mounting holes and earth it reliably. Fit the three-phase linkage shaft, bent arms and tie rods, connect the CS6 mechanism at the side or centre operating position (mechanism mounting height 1200 / 1000 mm), and check the interlock between the main and earthing switches before commissioning.

Outline dimension	Value (mm)
Base frame length over mounting holes	1570
Phase spacing	700 + 700
Upper frame width	900
Terminal spacing at live parts	≥ 350
Pole centre height	850 / 750
Single-pole insulator height	615
Mechanism mounting height	1200 / 1000
Side operating bent arm clearance	310
Mounting holes	4 × 18 × 25

Safety notice: The disconnector has no load or short-circuit breaking capability: it may be opened or closed only in the no-load conditions stated in the catalogue. Open the associated circuit breaker before operating the disconnector, interlock the two devices electrically or mechanically so it cannot be operated under load, and close the earthing switch only after proving the isolated section dead.

FAQs

G is the disconnector, W the outdoor place of use and □ the design sequence number; 15 is the rated voltage in kV and D indicates an earthing switch. The final two fields give the rated current in A and the rated short-circuit withstand current in kA.

No. It is designed only to open and close circuits under voltage without load and to provide a visible insulating gap for isolation. Short-circuit currents must be interrupted by the associated circuit breaker, with which the disconnector is interlocked.

The GW□-15D is the earthing-switch version: an earthing knife driven through its own tie rods by the CS6 manual mechanism, with a mechanical interlock against the main contacts. The GW-15 standard page covers the plain disconnector without earthing switch at tabulated 630 A / 1250 A ratings, and D1 / D2 earthing versions of that type are supplied on request.

It earths the isolated section for safe maintenance, so operating personnel no longer need to hang portable earth leads. The mechanical interlock between the main and earth contacts enforces the correct operating sequence and blocks misoperation.

It uses insulators with extended creepage distance so the disconnector meets the requirements of heavily polluted areas and effectively avoids pollution flashover during operation. The site should still be free from explosive or fire-causing substances.

State the rated voltage (15 kV or 40.5 kV), the rated current and withstand ratings fixed by the technical agreement, the plain or earthing-switch (D) version, the CS6 manual or motorised mechanism, the standard or pollution-proof insulators and the mechanism position (side or centre operating bent arm).

GW-15D Series Outdoor High-Voltage Disconnector with Earthing Switch