GW13 Neutral Point Outdoor High Voltage Disconnecting Switch GW13-72.5/630A

GW13-72.5/630A neutral point outdoor high voltage disconnecting switch is used for making and breaking transformer neutral point connections under no-load conditions. When the blade is in the normal open position, it provides an insulation distance that meets safety requirements. The operating mechanism output shaft can rotate 180deg horizontally, and the positioning device on the operating mechanism ensures that the contacts are in the correct position or open position. This product meets GB1985 "AC High Voltage Disconnecting Switches and Earthing Switches" and IEC-129 (1984) standards, with reliable performance, safe operation, simple structure, easy installation and adjustment, widely used in 63kV-110kV substations.

I. Overview

GW13 series neutral point disconnecting switch is used for making and breaking transformer neutral point connections under no-load conditions. When the blade is in the normal open position, it provides an insulation distance that meets safety requirements. The operating mechanism output shaft can rotate 180deg horizontally, and the positioning device on the operating mechanism ensures that the contacts are in the correct position or open position. This neutral point disconnecting switch meets GB1985 "AC High Voltage Disconnecting Switches and Earthing Switches" and IEC-129 (1984) standards. It has reliable performance, safe operation, simple structure, easy installation and adjustment. Widely used in 63kV-110kV substations.

II. Features

• Improved bearing turntable structure, giving the bearing housing waterproof function. Equipped with oil filling holes and adjusting screws, the switch has strong integrity and simpler, more convenient maintenance.
• Copper brazing process is used between the conductive rod and contacts, and between the conductive rod and contact finger seat. Additionally, flexible connections are added between contact fingers and contact finger seats, greatly reducing the main circuit resistance compared to screw connections, thus reducing contact heating during operation. The earthing guide rod uses aluminum alloy with excellent conductivity, the contact parts use copper castings, and flexible connections are added at the conductive rod to base connection and between earthing contact fingers and contact finger seats, greatly enhancing the conductivity of the earthing circuit.
• All exposed conductive parts are silver-plated using surface treatment process, with smooth surface, beautiful appearance, strong corrosion resistance and durability.
• Improved shaft-to-hole fit: iron-to-copper changed to copper-to-copper or stainless steel-to-copper, solving the seizing problem that occurs during long-term outdoor use. Exposed standard parts use stainless steel; metal parts are hot-dip galvanized, giving the switch stronger corrosion resistance.

III. Main Technical Parameters

Item	Unit	GW13-72.5	GW13-126
Rated Voltage	kV	72.5	126
Rated Current	A	630	630
Rated Short-time Withstand Current (4s)	kA	20	20
Rated Peak Withstand Current	kA	50	50
1min Power Frequency Withstand Voltage (RMS)	kV	140	230
Lightning Impulse Withstand Voltage (Peak)	kV	325	450
Mechanical Life	times	2000	2000
Minimum Insulation Gap After Opening	mm	＞675	＞1050
Main Circuit Resistance	μΩ	＜180	＜200
Matching Mechanism	-	GS17 or GJ6, CK7, CS14
Single Pole Weight	kg	160	200

IV. Outline Installation Dimensions

Please strictly follow the GW13-72.5/630A Neutral Point Outdoor High Voltage Disconnecting Switch product specifications for installation and operation to ensure the safe and stable operation of the power system and distribution equipment.

GW13 neutral point disconnecting switch is special equipment for switching transformer neutral point earthing modes. During installation, confirm that the open/close positions correspond to the correct operation mode wiring. The earthing down conductor cross-section should not be less than the main earthing grid conductor cross-section. The operating mechanism open/close identification nameplate should be clear and durable.