Motor Operated High voltage disconnect switch 126kV-363kV

Name: Motor Operated High voltage disconnect switch 126kV-363kV
Brand: Wenzhou Rockwill Electric Co., Ltd.
SKU: 1098
Price: 24600.00 USD
Availability: InStock

Wenzhou Rockwill Electric Co., Ltd.

17yrs 700++ staff 108000+m² US$150000000+ China

Attributes Description Documentation Resource Library Supplier

Key attributes

Brand	ROCKWILL
Series	RDS
Rated voltage	126kV-363kV
Rated current	2000-5000A
Rated short-time withstand current	50/63kA
Rated frequency	50/60Hz

Description

The RDS series outdoor high-voltage disconnector is designed for 126 kV, 145 kV, 252 kV, and 363 kV three-phase AC power systems. It performs no-load line switching, equipment isolation, and bus-transfer current switching.

The disconnector uses a double-post horizontal telescopic structure with a single-arm foldable conductive arm and plug-type contacts, forming a horizontal insulating break when open. Driving components and balance springs are sealed inside the conductive tube, protected from environmental exposure, resulting in a compact, corrosion-resistant assembly.

An earthing switch can be fitted on one or both sides. The disconnector is motor-operated with three-pole linkage for 126-252 kV, and single-pole motor operation with three-pole linkage capability for 363 kV. The earthing switch is manually operated for 126-252 kV, with manual or motor options for 363 kV, which uses a two-step opening and closing motion for reliable plug-type contact.

Key Features

Anti-corrosion telescopic structure ：Single-arm foldable conductive arm with driving components and balance springs sealed inside the conductive tube, made of high-conductivity aluminum alloy for light weight, high strength, and corrosion resistance in coastal, industrial, and harsh environments
Self-cleaning plug-type contact：Self-wiping action keeps contact surfaces clean; short-circuit current increases clamping force automatically for reliable current transfer; flexible connection through the foldable joint eliminates moving contact maintenance
Versatile earthing switch：earthing switch can be installed on one or both sides; 363 kV version uses a two-step plug-type closing motion for reliable high-current withstand
Proven operating mechanism ：Motor mechanism with three-pole linkage for 126-252 kV; single-pole or three-pole motor operation for 363 kV; manual option available for earthing switches
Factory assembled： Complete assembly and adjustment completed before delivery, minimizing on-site installation and commissioning work

Technical Parameters

Item	Unit	126 kV	145 kV	252 kV	363 kV
Rated voltage (Um)	kV	126	145	252	363
Rated frequency	Hz	50 / 60	50 / 60	50 / 60	50 / 60
Rated current	A	2,000, 3,150, 4,000	2,500	2,000, 2,500, 3,150, 4,000, 5,000	4,000, 5,000
Rated short-time withstand current	kA	50 / 63	50 / 63	50 / 63	50 / 63
Rated short-circuit withstand duration	s	3	3	3	3
Rated peak withstand current	kA peak	125	125	125 / 160	160
Rated power-frequency withstand voltage (1 min), phase to earth	kV	230	275	460	510
Rated power-frequency withstand voltage (1 min), across isolating distance	kV	230 + 73	275 + 95	460 + 145	510 + 210
Rated lightning impulse withstand voltage, phase to earth	kV peak	550	650	1,050	1,175
Rated lightning impulse withstand voltage, across isolating distance	kV peak	550 + 103	650 + 134	1,050 + 200	1,175 + 295
Mechanical endurance	operations	10,000	10,000	10,000	10,000
Terminal static load (longitudinal / transverse / vertical)	N	1,250 / 750 / 1,000	1,250 / 750 / 1,000	2,500 / 1,500 / 1,250	4,000 / 1,600 / 1,500
Bus-transfer current switching capability	A / V	1,600 / 100	1,600 / 100	1,600 / 100	2,400 / 435
Creepage distance (normal / heavy pollution)	mm	3,150 / 3,906	3,625 / 4,495	6,300 / 7,812	9,450
Operating altitude	m	≤ 2,000	≤ 2,000	≤ 2,000	≤ 2,000
Pollution level per IEC 60815	class	IV (very heavy)	IV (very heavy)	IV (very heavy)	IV (very heavy)
Radio interference voltage (RIV)	µV	≤ 500	≤ 500	≤ 500	≤ 500

Operating Mechanism

Item	126 kV / 145 kV / 252 kV	363 kV
Disconnector mechanism	Motor (three-pole linkage)	Motor (single-pole, three-pole linkage supported)
Earthing switch mechanism	Manual	Manual or motor
Motor voltage	AC 380 V / DC 220 V	AC 380 V / DC 220 V
Control voltage	AC 220 V / DC 220 V / DC 110 V	AC 220 V / DC 220 V / DC 110 V
Opening / closing time	12 s ± 1 s	16 s ± 1 s

Application Scenarios

Transmission substations： Isolation of busbars, circuit breakers, and overhead lines at 126 kV, 145 kV, 252 kV, and 363 kV
Corrosive environments：Coastal, industrial, and chemical plant substations where corrosion resistance is critical
Grid interconnections ：Bus-transfer current switching at transmission switching stations
Heavy pollution areas：Creepage distance up to 9,450 mm suitable for Class IV (very heavy) pollution environments

Order Information

When ordering, specify:

Product model and rated voltage
Rated current and rated short-time withstand current
Creepage distance requirement
Earthing switch configuration (none, left, right, or both sides)
Arrangement form (cross or parallel)
Upper busbar type (soft or hard) and tubular busbar outer diameter
Operating mechanism (manual or motor), motor voltage, and control voltage
Number of auxiliary switch contacts
Installation method
Altitude and pollution level (if different from standard)

Documentation Resource Library High voltage disconnect switch

Restricted

12 to 550kV Center Side Break Disconnect Switch Installation and Instruction Manuals 12 to 550kV Center Side Break Disconnect Switch Installation and Instruction Manuals

Installation Manual

English

PDF

Restricted

252 to 1100kV Double End Break Disconnect Switch Installation and Instruction Manuals 252 to 1100kV Double End Break Disconnect Switch Installation and Instruction Manuals

Installation Manual

English

PDF

Public.

Rockwill Electric Group Profile Rockwill Electric Group Profile

Brochure

English

PDF

Frequently asked questions

For a 110kV system whose main wiring adopts a sectionalized single busbar with a bypass circuit breaker, which of the following statements about the interlocking of the bypass disconnector is correct?

The earthing switch on the bypass bus side of the bypass circuit must be operable only when the disconnector on the bypass bus side of the bypass circuit breaker is open.
The bypass bus disconnector of the circuit breaker must be operable only when the circuit breaker is open and the sectionalizing disconnector connecting the disconnector to the busbar is open.

How do the insulation designs of a live tank breaker and a dead tank breaker differ?

A live tank breaker relies on porcelain columns, air, or composite insulating materials for phase-to-ground insulation. A dead tank breaker uses SF₆ (or other insulating gases) inside a sealed metal tank, providing high insulation strength unaffected by external humidity or contamination.

Know your supplier

ROCKWILL

Wenzhou Rockwill Electric Co., Ltd.
17yrs 500-1000 108000+m² US$150000000+ China

Online store

On-time delivery rate

Response time

100.0%

≤4h

Company overview

Workplace: 108000m² Total staff: 700+ Highest Annual Export(usD): 150000000

Services

Business Type: Design/Manufacture/Sales

Main Categories: Medium and High Voltage Switchgear/Power and Distribution Transformers/Instrument Transformers and Sensors/Lightning Protection and Electrical Insulation/Substations and E-Houses/Electrical Panel and Controlgear

$24600.00

Pricing calculator

12 to 550kV Center Side Break Disconnect Switch Installation and Instruction Manuals

252 to 1100kV Double End Break Disconnect Switch Installation and Instruction Manuals

Rockwill Electric Group Profile

Warranty by

Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.