Robust High voltage disconnect switch China factory-72.5kV 126kV 145kV

Name: Robust High voltage disconnect switch China factory-72.5kV 126kV 145kV
Brand: Wenzhou Rockwill Electric Co., Ltd.
SKU: 1089
Price: 14650.00 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	72.5kV-145kV
Rated current	1250-4000A
Rated short-time withstand current	31.5-50kA
Rated frequency	50 / 60

Description

The RDS series outdoor disconnector is designed for 72.5 kV, 126 kV, and 145 kV three-phase AC power systems. It provides visible isolation for equipment maintenance and performs no-load line switching and bus-transfer current switching in sub-transmission and transmission networks.

Each phase assembly consists of a rotating insulator column and a fixed support insulator column. The conductive blade is driven by the rotating insulator and breaks at the center, creating a horizontal isolating gap. The rotating mechanism is supported by sealed, self-lubricating bearings requiring no periodic greasing throughout the product service life. The conductive path uses a flexible copper braid connection across the rotating joint, ensuring stable current transfer without stress on the contact system.

The earthing switches can be installed on one or both sides with mechanical interlocking. The disconnector is available with manual or motor operation depending on substation automation requirements.

Key Features

Center side break configuration ：Rotating insulator drives the conductive blade laterally to engage or disengage from the fixed contact, producing a distinct breaking motion that reduces ice-shedding risk in freezing conditions
Sealed self-lubricating bearings ：Rotating joints are factory-sealed with lifetime lubrication, eliminating the need for periodic greasing and reducing maintenance intervals across the 10,000-operation mechanical life
Flexible copper braid current path ：Current transfers through a flexible braid across the rotating insulator base rather than through sliding contacts at the hinge, eliminating a common source of contact degradation and ensuring stable resistance
Alloy aluminum conductive tube ：Main blade is formed from high-strength aluminum alloy tube, combining light weight with excellent conductivity and corrosion resistance for outdoor service
Integrated mechanical interlock ：Positive mechanical interlock between disconnector and earthing switch prevents closing the earthing switch while the main blade is closed, safeguarding operators from inadvertent energization
Pre-assembled phase units ：Each phase is factory assembled and adjusted, shipped as a complete unit requiring only mounting on the foundation and interphase linkage connection, reducing on-site installation time

Technical Parameters

Item	Unit	72.5 kV	126 kV	145 kV
Rated voltage (Um)	kV	72.5	126	145
Rated frequency	Hz	50 / 60	50 / 60	50 / 60
Rated current	A	1,250, 2,000, 3,150	2,000, 3,150, 4,000	2,000, 3,150, 4,000
Rated short-time withstand current	kA	31.5 / 40	40 / 50	40 / 50
Rated short-circuit withstand duration	s	3	3	3
Rated peak withstand current	kA peak	80 / 100	100 / 125	100 / 125
Rated power-frequency withstand voltage (1 min), phase to earth	kV	140	230	275
Rated power-frequency withstand voltage (1 min), across isolating distance	kV	140 + 42	230 + 73	275 + 95
Rated lightning impulse withstand voltage, phase to earth	kV peak	325	550	650
Rated lightning impulse withstand voltage, across isolating distance	kV peak	325 + 59	550 + 103	650 + 134
Mechanical endurance	operations	10,000	10,000	10,000
Terminal static load (longitudinal / transverse / vertical)	N	1,000 / 750 / 750	1,250 / 750 / 1,000	1,250 / 750 / 1,000
Bus-transfer current switching capability	A / V	1,600 / 100	1,600 / 100	1,600 / 100
Creepage distance	mm	1,820 / 2,250	3,150 / 3,906	3,625 / 4,495
Operating altitude	m	≤ 2,000	≤ 2,000	≤ 2,000
Pollution level per IEC 60815	class	IV (very heavy)	IV (very heavy)	IV (very heavy)
Radio interference voltage (RIV)	µV	≤ 500	≤ 500	≤ 500

Operating Mechanism

Item	72.5 kV	126 kV	145 kV
Disconnector mechanism	Manual or motor (three-pole linkage)	Manual or motor (three-pole linkage)	Manual or motor (three-pole linkage)
Earthing switch mechanism	Manual	Manual	Manual
Motor voltage	AC 380 V / DC 220 V	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	AC 220 V / DC 220 V / DC 110 V
Opening / closing time (motor)	9 s ± 1 s	12 s ± 1 s	12 s ± 1 s

Application Scenarios

Sub-transmission substations ：72.5 kV busbar and line isolation in regional and industrial power grids
Transmission substations :126 kV and 145 kV incoming line, busbar, and circuit breaker isolation
Industrial power parks :Steel, petrochemical, and mining facilities operating at 72.5 kV and 126 kV
Power plant auxiliary systems :Generator step-up transformer isolation at 126 kV and 145 kV
Substation brownfield expansion :Retrofitting existing disconnectors with the same foundation footprint and busbar interface

Order Information

When ordering, specify:

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

Documentation Resource Library High voltage disconnect switch

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Installation Manual

English

PDF

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

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Public.

Rockwill Electric Group Profile Rockwill Electric Group Profile

Brochure

English

PDF

Frequently asked questions

What are the advantages of the bearing assembly of the RDS‑series outdoor high‑voltage disconnector?

The rotating joints of the RDS‑series outdoor high‑voltage disconnector adopt factory‑sealed lifetime self‑lubricating bearings. Periodic greasing is unnecessary throughout the whole mechanical life of 10 000 operations, which effectively reduces later‑stage maintenance workload.

How is the mechanical interlock implemented on the RDS‑series outdoor high‑voltage disconnector with earthing switch?

The RDS‑series outdoor high‑voltage disconnector is equipped with integrated positive mechanical interlock between the main disconnector and earthing switch.

It mechanically forbids closing the earthing switch when the main conductive blade is closed, and prevents operators from accidental energization caused by mis‑operation.

What parameters need to be clearly specified when ordering the RDS‑series outdoor high‑voltage disconnector?

When ordering the RDS‑series outdoor high‑voltage disconnector, customers shall specify product model & rated voltage, rated current, rated short‑time withstand current, operating‑mechanism type, control voltage (for motor‑operated type), creepage distance, earthing‑switch configuration, arrangement form, upper‑busbar specification, number of auxiliary‑switch contacts, installation method, as well as altitude and pollution level if different from standard conditions.

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

$14650.00

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Rockwill Electric Group Profile

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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.