High voltage disconnect switch trader 126kV 145kV 252kV 420kV 550kV

Name: High voltage disconnect switch trader 126kV 145kV 252kV 420kV 550kV
Brand: Wenzhou Rockwill Electric Co., Ltd.
SKU: 2036
Price: 1.99 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
Model NO.	High voltage disconnect switch trader 126kV 145kV 252kV 420kV 550kV
Rated voltage	550kV
Rated normal current	4000A
Rated frequency	50/60Hz
Rated peak value withstand current	160kA
Rated short-time withstand current	63kA
Series	DS6B

Description

Product Introduction

The HV disconnect switch is outdoor high-voltage equipment for 50Hz/60Hz three-phase AC systems. This disconnect switch performs no-load line switching, circuit rearrangement and power flow regulation, while providing safe insulation for busbars, circuit breakers and other HV devices. The HV disconnect switch can switch inductive, capacitive and bus transfer current.

With a single-post double-arm scissor telescopic structure, the disconnect switch fits perfectly for busbar layout. It can be mounted directly under busbars with small footprint, delivering outstanding energy-saving benefits for substations with double busbars and bypass busbars.

Matched with JW10 earthing switch, the HV disconnect switch supports lower-layer busbar grounding; upper-layer busbars need independent earthing switches. 363kV and 550kV disconnect switch adopt SRCJ8 motor actuators for single-pole operation and three-pole linkage; 126kV and 252kV HV disconnect switch use SRCJ3 motor actuators for three-pole linkage. The earthing switch is fitted with SRCS manual actuator for synchronous three-pole operation.

The disconnect switch has passed official industry certification. Its structural design and overall performance comply with national standards, reaching international advanced level of similar HV disconnect switch products.

The HV disconnect switch is composed of three single poles and actuators, including base, post insulator, operating insulator and conductive assembly. Conductive parts consist of gear box, foldable conductive arms and fixed contacts for overhead busbars.

Driven by the actuator and four-link scissor mechanism, the disconnect switch completes closing and opening operations, forming stable insulation clearance after switch-on.

Main Characteristics

Excellent conductive structure: Open layout with central conductor arrangement; balance spring adopts aluminum cover sealing. Key transmission parts are exposed for easy installation and debugging. Bearing with dust cover and sealed structure ensures good dustproof performance.
Large contact clamping area: Double-arm scissor structure enables wide rated contact coverage, making the HV disconnect switch suitable for both soft and hard busbars.
Open visible gear box, convenient for installation, debugging and maintenance. Integrated crank arm design reduces transmission links and improves efficiency and reliability. Double-bearing rotating shaft ensures flexible and stable operation of the disconnect switch.
Electromechanical separation design: Conductive components, springs and mechanical driving parts are isolated, avoiding current interference and improving the operational stability of the HV disconnect switch.
Supports one-key sequence control and double confirmation function expansion.

Main technical parameters

Among these voltage levels 225kV/230kV/330kV/345kV disconnect switches, the rated short-circuit breaking current is 63kA, and customization is available.

NO	Specifications		Unit	Value
1	Product model			DS6B-126D	DS6B-145D	DS6B - 252D	DS6B - 420D	DS6B-550D
2	Rated voltage		kV	126	145	252	420	550
3	1min power frequency withstand voltage (r.m.s)	Phase to phase to earth	kV	230	275	460	520	740
3	1min power frequency withstand voltage (r.m.s)	Across isolating distance	kV	230(+70)	315	460(+145)	610	740(+315)
4	Lightning impulse withstand voltage (peak 1.2/50μs)	Phase to phase to earth	kV	550	750	1050	1425	1675
4	Lightning impulse withstand voltage (peak 1.2/50μs)	Across isolating distance	kV	550(+100)	750	1050(+200)	1425(+240)	1675(+450)
5	Rated frequency		HZ	50/60
6	Rated current		A	2000/3150	2000/3150	2000/2500/3150/4000/5000	4000	4000
7	Rated short - time withstand current (r.m.s)		kA	50	104	125/160	164	160
8	Rated peak withstand current		kA	125	104	50/63	63	63
9	Rated short - circuit withstand time		S	3	3	3	2	3
10	Wiring terminal static mechanical load -	Longitudinal	N	1250	1250	2000	4000	4000
		Horizontal	N	750	800	1500	2000	2000
		Vertical	N	1000	1000	1250	1500	2000
11	Creepage distances		mm	3150,3906	3625,4495	6300,7812	10500,13020	13750
12	Mechanical life		Times	10000
13	Motor operating mechanism		Model	SRCJ7		SRCJ3	SRCJ8
14	Motor voltage		V	AC380/DC220
15	Control circuit’s voltage		V	AC220/DC220/DC110
16	Opening/closing time		S	12±1			16±1
17	Manual operating mechanism		Model	SRCS
18	Electromagnetic lock’s voltage		V	AC220/DC220/DC110

Applicable Service Conditions

This HV disconnect switch adapts to outdoor substation environments, suitable for conventional temperature, altitude and general polluted areas. It runs reliably in high-altitude, coastal humid and industrial corrosion sites with good seismic and anti-pollution performance.

Order Notice

Specify model, rated voltage, rated current, short-time withstand current and creepage distance for the disconnect switch.
Confirm whether the HV disconnect switch is matched with earthing switch.
Clarify soft or hard type of upper busbar.
Provide outer diameter of tubular busbar if required.
Select installation layout: cross-over or parallel arrangement for the disconnect switch.
Confirm actuator model, motor voltage, control voltage and auxiliary switch contact quantity.

FAQ for High voltage disconnect switch

Q: How do these 550kV disconnectors (Siemens, Hitachi, GE, and XD Group) perform in terms of key electrical parameters such as rated voltage, rated current, and withstand current?

Basic Electrical Parameters

Rated Voltage: All four models from Siemens, Hitachi Energy, GE, and Pinggao are rated for 550 kV.
Rated Current: The Siemens, Hitachi, and Pinggao models are rated for 4000A. The GE PKG Gen3-550 offers a higher rated current of 5000A, making it suitable for applications with higher power flow requirements.
Short-Circuit Withstand: All models demonstrate identical performance, with a short-time withstand current of 63 kA for 3 seconds.
Peak Withstand Current: All models share the same peak withstand current rating of 171 kA.

Q: What are the interlocking regulations for bypass disconnectors in thermal power plants and substations?

The interlocking regulations for bypass disconnectors in thermal power plants and substations are as follows:

The bypass disconnector of each line can only be operated when the bypass circuit breaker is open and its bypass bus disconnector is closed. For the operation of the line bypass disconnector, it can only be operated when its outgoing line earthing switch is open.
The bypass bus-side disconnector of the bypass circuit breaker can only be operated when the bypass circuit breaker is open and the disconnector connected for bus tie operation is open.
The earthing switch on the bypass bus side of the bypass circuit can only be operated when the disconnector on the bypass bus side of the bypass circuit breaker is open.
The earthing switch on the bypass circuit breaker side of the bypass circuit can only be operated when the bypass circuit breaker and its bypass bus-side disconnector are open, and the disconnector connected for bus tie operation is open.

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: High Voltage Electrical Apparatus/Electric transformer

Negotiable

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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.

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