GN27 series · Indoor isolation
Three-pole indoor disconnector for switching energized circuits under no-load conditions. Select the paired current and withstand ratings, mounting form, earthing arrangement and manual mechanism to suit the panel.
Operate only with the circuit unloaded. Confirm the complete model, mounting form, earthing arrangement and operating mechanism for the order.
Choose a complete current and withstand combination, then match the installation form and site conditions. Operate the disconnector only with the circuit unloaded.
C1 identifies blade-side through-wall mounting; C2 stationary-contact-side through-wall mounting. D specifies an earthing blade. Thermal and dynamic withstand currents are paired with rated current by model and do not define load-breaking capability.
Confirm the voltage designation and nameplate for the ordered assembly. Agree any site conditions outside this envelope before ordering.
Match the flat-mounted, C1 or C2 form to the panel. Specify any D earthing blade together with its manual mechanism and operating linkage.
| Arrangement | Mechanical and primary fit | Operating interfaces and interlock |
|---|---|---|
| Flat-mounted GN27 | Match the base fixing pattern, phase spacing and primary terminals to the panel. | Specify the complete mechanism and operating linkage; confirm whether an earthing blade is required. |
| Through-wall C1 | The moving-contact blade side passes through the wall. Confirm wall openings, terminal connections and clearances. | Match the mechanism position and linkage to the wall and panel arrangement. |
| Through-wall C2 | The stationary-contact side passes through the wall. Confirm wall openings, terminal connections and clearances. | Specify the complete model and any D earthing-blade arrangement, with its compatible mechanism and interlock. |
Confirm the full model, quantity, voltage designation, paired current / withstand combination, mounting form and mechanism supply. Match the primary connections, linkage and earthing interlock to the complete order drawing.
Compare the C2, D and C2D arrangements carrying the GN27-40.5 designation. Match the voltage designation, current rating and mounting form to the approved order drawing, including dimensions, units, tolerances and cabinet clearances.
The manual covers model designations, installation arrangements and manual operation.
Available · PDF · 3 pages
Ratings, service conditions, C1/C2 and D model coding, operating mechanisms, installation and outline references. Confirm the selected voltage designation and cabinet interfaces before ordering.
Configuration · GN27-40.5D/1250
Price reference for the specified GN27-40.5D/1250 configuration. 40.5 kV, 1250 A D version. Confirm the operating arrangement against the project drawings.
Price range
USD 675–680 / set
USD per complete three-phase set. Minimum order: 1 set. USD 680 per set for 1–9 sets; USD 675 per set for 10+ sets. Shipping and taxes are excluded. Other configurations and accessories require a separate quotation. Confirm the specification and final quotation before ordering.
The range reflects order-quantity tiers for this configuration; it does not cover every option in the series.
| Quantity (sets) | Price per set |
|---|---|
| 1–9 | USD 680 |
| 10+ | USD 675 |
Answers about voltage designation, no-load isolation, mounting and ordering requirements.
The paired current / 4 s thermal / dynamic withstand ratings are 630 A / 20 kA / 50 kA, 1,250 A / 31.5 kA / 80 kA and 2,000 A / 40 kA / 100 kA. Specify the complete model, including the required C and D suffixes. See the model rating schedule.
GN27-40.5 is rated at 40.5 kV. Match the selected current and withstand combination to the ordered assembly. See the electrical ratings.
GN27 is an indoor disconnector for connecting or changing circuits at voltage under no-load conditions. Its thermal and dynamic withstand ratings are not load-breaking or short-circuit interruption ratings. Coordinate isolation with the switchgear operating procedure.
C1 is a moving-contact-side through-wall arrangement; C2 is a stationary-contact-side through-wall arrangement. D adds earthing blades, with a mechanical interlock between the main and earthing blades. The standard form uses CS6-2; the D form uses CS6-1. If CS6-2 is omitted, state this in the contract. Confirm the complete form and mechanism in the configuration choices.
Horizontal, vertical or inclined mounting is permitted, with the open contact blades facing downward. Check operating access, crank and linkage fit, wall connections and phase order. The construction reference gives 540 mm between paired supports and 460 mm phase centres; confirm the selected assembly against its installation drawing.
Provide quantity, full model, confirmed voltage designation, current rating, mounting form, earthing requirement and operating mechanism. Include the cabinet interfaces and required linkage arrangement. Match dimensions, units, tolerances and clearances to the approved order drawing. Use the manual to specify the complete arrangement.
