GW4 12kV outdoor high voltage disconnector switch | Reliable Power Isolation | Chennuo Electric-Chennuo Electric Technology Group Co., Ltd

Feature

The switch is a single-pole double-column horizontal rotation structure, and the three-pole group can be used together, and it can also be used as a single pole. The single pole of the disconnector is composed of chassis, bearing seat, porcelain bottle, conductive main circuit, and mechanical connecting rod. The three poles of the isolation switch are connected into groups with joints, linkage rods, pipe joints, pivot pins, steel pipes, and operating mechanisms.

A grounding switch can be installed at one or both ends of the chassis of the isolation switch. The grounding switch at both ends of the isolation switch is controlled by the operating mechanism interlocked, so that the isolation switch and the grounding switch can realize the anti-misoperation operation in the order of main division - ground closure - ground division - main closure.

Base frame: It is composed of hot-rolled steel channel, with bearing seats installed at both ends of the base frame, and two deep groove ball bearings are built in to ensure the flexible rotation of shaft assembly.

Pillar porcelain bottle: Stain-resistant porcelain bottle (pollution grade IV) is adopted, and each pole isolation switch is equipped with two pillar porcelain bottles erected and installed on the shaft assembly, and the upper end of the bottle is fixed with a conductive main circuit.

Conductive main circuit: It is composed of outlet terminals, soft connections, contact arms, contacts and contact finger assembly, and the conductive circuit has undergone special oxidation and anti-corrosion treatment, with excellent conductivity and high anti-corrosion level, and is suitable for various complex installation environments.

Mechanical linkage: The switch is operated by the operating mechanism through the operating shaft installed at the bottom of the base, which drives the strut post insulator to rotate 90 degrees, and the linkage link drives the three-pole linkage to realize the opening and closing of the switch. The grounding switch is driven by the operating shaft to drive the ground knife lever to drive the ground knife, and rotate up (or down) at a certain angle to complete the opening and closing.

Operating mechanism: The operating mechanism has manual type CS17-I/II/III (respectively equipped with non-grounding, single grounding, double grounding, with mechanical locking) and electric CJ6 series (can be flexibly matched to achieve single electric, electric + manual, electric + electric operation mode).

Parameter

Model	Rated voltage (kV)	Rated Current (A)	Thermal current (kA/4s)	Dynamic current (kA)	Power Frequency Withstand Voltage(KV/60s)		Lightning impulse withstand voltage (KV)
					Interphase/Ground	Fracture	Interphase/Ground	Fracture
GW4	12	630	20	50	42	48	75	85
	12	1250	31.5	80
	12	1600	31.5	80
	12	2000	40	100

Note: High-altitude areas are corrected according to the altitude coefficient

Product Application Scope:
a. Altitude: Standard type ≤2000m, plateau type ≤4000m
b. Ice thickness <10mm
c. Wind pressure ≤700Pa
d. Seismic intensity <8 degrees
e. Ambient air temperature: ±40℃
f. Pollution level: IV
g. Corrosion resistance level: Standard C3, special areas C4
h. Installation sites must be free of flammable and explosive materials, explosion hazards, chemical corrosion, and severe vibrations.

Why Choose Chennuo Electric?

Full-Spectrum Voltage Coverage (10kV – 220kV): A single-source manufacturing partner capable of fulfilling complete substation tier requirements from medium-voltage distribution up to high-voltage transmission.
Rigorous Factory Testing: Every outdoor isolator undergoes strict quality checks, including mechanical endurance testing, voltage withstand tests, loop resistance measurement, and salt-spray corrosion tests.
Global Project Compliance: Engineered and manufactured in strict compliance with international IEC standards and national standards, ensuring hassle-free grid integration worldwide.
Tailored Engineering & Export Support: Professional technical team ready to assist with custom mounting dimensions, special seismic requirements, and reliable international logistics packaging.

Frequently Asked Questions (FAQ):

Q1: What is the primary function of an outdoor disconnecting switch?
A: An outdoor disconnecting switch (isolator) is used to establish a visible safety isolation gap in high-voltage circuits when equipment is de-energized, allowing safe maintenance. It is designed to switch small charging currents or loop currents, but not heavy load or short-circuit currents.

Q2: What voltage classes do Chennuo’s outdoor isolator series cover?
A: Our outdoor disconnecting switch portfolio spans a comprehensive voltage range from 10kV, 35kV, 110kV, up to 220kV, with rated currents up to 3150A to accommodate diverse grid configurations.

Q3: Are grounding switches (earthing blades) integrated with these units?
A: Yes. Depending on system requirements, our outdoor isolators can be configured without grounding, with single-side grounding blades, or with double-side grounding switches to ensure safety compliance.

Q4: How do these switches handle severe outdoor weather like heavy ice and wind?
A: They are built with high-strength structural frames treated with hot-dip galvanizing, high-torque operating mechanisms, and reinforced insulator columns designed to withstand heavy wind loads, extreme temperature swings, and specified ice thicknesses.

Q5: Do you support motorized operation for remote substation automation?
A: Yes. While standard operation uses manual mechanisms, all high-voltage outdoor disconnectors can be equipped with matching electric motor operating mechanisms for remote SCADA control in modern smart substations.