Horizontal center break disconnector for substations-72.5kV to 550kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Horizontal center break disconnector for substations-72.5kV to 550kV
Rated voltage	420kV
Rated normal current	4000A
Rated short-time withstand current	63kA
Series	RDS

Description

The RDS disconnectors are available for up to 550 kV, 4000 A and 63 kA. These type of disconnector have a low friction design and offer minimized contact resistance. They are equipped with dead center interlocking for reliability in extreme conditions. Some other important features of these disconnectors are:

No external spring in contact fingers
Superior design of mechanical interlock
Strong rotary pedestals
Ice breaking capacity

Technology Parameters

Rated voltage (kV)	72.5	123	145	245	300	362	420	550
Rated current (A)	4000
Short time withstand current (kA)	63
Power frequency withstand voltage (kV)
against earth	140	230	275	460	395	450	520	620
across isolating distance	160	265	315	530	435	520	610	800
Lightning impulse withstand voltage (kV)
against earth	325	550	650	1050	1050	1175	1425	1550
across isolating distance	375	630	750	1200	1050	1175	1425	1550
Switching impulse withstand voltage (kV)
against earth					850	950	1050	1175
across isolating distance					700	800	900	900

Documentation Resource Library disconnector

Public.

Rockwill Electric Group Profile

Brochure

English

PDF

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

Installation Manual

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12 to 800kV Center Vee Center Break Disconnect Switch Installation and Instruction Manuals

Installation Manual

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

Installation Manual

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12kV 40.5kV 72.5kV 225kV Vertical Break Disconnect Switch

Installation Manual

English

PDF

FAQ for disconnector

How does the design reduce long-term maintenance costs and mechanical wear?

It features a low friction design and uses no external springs in the contact fingers, which effectively minimizes contact resistance and component degradation.

What features ensure the mechanical stability and safety of the equipment during operation?

It utilizes strong rotary pedestals and a superior mechanical interlock design to maintain structural integrity and prevent operational errors.

$70000.00

Pricing calculator

Model

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.