GN27 GN2-40.5 Indoor High Voltage Disconnector

Our GN27/GN2-40.5 indoor high-voltage disconnectors feature vertical-rotating blade design with three-pole common-base construction, delivering reliable no-load switching for 40.5kV systems.

• Rated at 40.5kV with current options from 630A to 2500A; swing-type multi-finger fixed contact ensures low operating torque and superior heat dissipation.

• Available in plain mounting, through-wall type, and with integrated earthing switch; suitable for horizontal, vertical, or inclined installation.

• Operated by CS6-2 manual or CX6 motor-operated mechanism; high insulation performance with long-creepage-distance insulators.

• Fast delivery, reliable quality, responsive service, and extensive project experience backed by our company.

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Product Overview

The GN27(GN2)-40.5 is a three-pole AC 50Hz indoor high-voltage disconnector for rated voltages up to 40.5kV, intended for no-load switching operations under energized conditions. It is operated by either a CS6-2 manual operating mechanism or a CX6 motor-operated mechanism.

This series features a vertical-rotating blade type with three-pole common-base design. The fixed contact on the break side utilizes a swing-type multi-finger contact assembly, ensuring low contact pressure per finger, reduced wear, superior heat dissipation, and low operating torque. High insulation performance and mechanical strength are achieved through long-creepage-distance post insulators and tie-rod insulators. To accommodate diverse installation requirements, the product is available in plain mounting type, through-wall type, and with integrated earthing switch. The disconnector is suitable for horizontal, vertical, or inclined installation.

Technical Specifications

Model	W	W1	W2	H	H1	H2
GN27-40.5/630	805	220	700	970	560	483
GN27-40.5/1250	810	220	700	970	550	485
GN27-40.5/2000	885	250	700	1010	585	485
GN27-40.5/2500	953	250	730	1010	562	457

Type Designation and Its Meaning

GN27-40.5D

G: Disconnector (Isolator)
N: Indoor
27: Design Serial Number
40.5: Rated Voltage (kV)
D: With Earthing Switch

Normal Service Conditions

Altitude: ≤ 1000 m above sea level

Ambient Temperature: -25 °C to +40 °C

Relative Humidity: Daily average ≤ 95%, monthly average ≤ 90%

Atmosphere: Free from severe corrosive gases, salt spray, conductive dust, and other explosive or chemically aggressive substances

Vibration: No frequent or severe vibration

Outline and Installation Dimensions

Figure 1: Outline Dimensions for GN27-40.5/630~2500 Indoor High-Voltage Disconnector (mm)

Figure 2: Outline and Installation Dimensions for GN27-40.5C 630~1250 Indoor High-Voltage Disconnector

Terminal specifications: 630A (2 holes, Φ13); 1250A (4 holes, Φ13)

Mounting holes: 4 holes, Φ18×28 (slotted)

Dimensional callouts: Refer to installation diagram for details (e.g., 1350, 1260, 1500)

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