High voltage disconnect switch trader 252kV 363kV 420kV

Name: High voltage disconnect switch trader 252kV 363kV 420kV
Brand: Wenzhou Rockwill Electric Co., Ltd.
SKU: 1093
Price: 41300.00 USD
Availability: InStock

Wenzhou Rockwill Electric Co., Ltd.

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

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Key attributes

Brand	ROCKWILL
Series	RDS
Rated voltage	252kV/363kV/420kV
Rated current	2000A-5000A
Rated short-time withstand current	50 / 63kA
Rated frequency	50 / 60Hz

Description

The RDS series outdoor disconnector is designed for 252 kV, 363 kV, and 420 kV three-phase AC transmission systems. It provides visible isolation for equipment maintenance, performs no-load line switching, and switches inductive and capacitive currents within its rated capacity.

The disconnector is operated by motor actuators with three-pole linkage. At 363 kV and 420 kV, each phase uses an independent SRCJ8 motor actuator providing single-pole operation with three-pole linkage capability; at 252 kV, a single SRCJ3 motor actuator drives all three poles simultaneously.

JW10 earthing switches are installed on one or both sides as required. The earthing switch is fitted with an SRCS manual actuator for synchronous three-pole operation. For substations with lower-layer busbar configurations, the earthing switch can directly earth the busbar; upper-layer busbars require independent earthing switches for each layer.

Key Features

Inductive and capacitive current switching：Capable of switching no-load transformer magnetizing currents and unloaded line-charging currents within defined limits, extending beyond basic isolation functionality
Dual-actuator architecture at 363 kV and 420 kV：Independent SRCJ8 motor actuator per phase provides single-pole operation flexibility while supporting three-pole linkage for synchronized control, enabling phase-selective maintenance without full line outage
SRCJ3 three-pole actuator at 252 kV：Single SRCJ3 motor actuator drives all three phases via mechanical linkage, providing a compact and cost-optimized solution for 252 kV substations where single-pole operation is not required
The earthing switch with SRCS actuator：Synchronous three-pole manual operation with positive mechanical interlock; supports lower-layer busbar direct earthing in multi-layer substation layouts
Flexible busbar earthing arrangement：Earthing switch directly earths lower-layer busbars; modular configuration allows independent earthing switches for upper-layer busbars, adapting to various substation busbar layouts without structural modification
Transmission-grade terminal loading： Terminal loads up to 4,000 N longitudinal for 363 kV and 420 kV ratings, accommodating heavy overhead line and busbar connections in high-capacity transmission substations

Technical Parameters

Item	Unit	252 kV	363 kV	420 kV
Rated voltage (Um)	kV	252	363	420
Rated frequency	Hz	50 / 60	50 / 60	50 / 60
Rated current	A	2,000, 3,150, 4,000	3,150, 4,000, 5,000	3,150, 4,000, 5,000
Rated short-time withstand current	kA	50 / 63	50 / 63	50 / 63
Rated short-circuit withstand duration	s	3	3	3
Rated peak withstand current	kA peak	125 / 160	125 / 160	125 / 160
Rated power-frequency withstand voltage (1 min), phase to earth	kV	460	510	520
Rated power-frequency withstand voltage (1 min), across isolating distance	kV	460 + 145	510 + 210	520 + 240
Rated lightning impulse withstand voltage, phase to earth	kV peak	1,050	1,175	1,425
Rated lightning impulse withstand voltage, across isolating distance	kV peak	1,050 + 200	1,175 + 295	1,425 + 339
Mechanical endurance	operations	10,000	10,000	10,000
Terminal static load (longitudinal / transverse / vertical)	N	2,500 / 1,500 / 1,250	4,000 / 1,600 / 1,500	4,000 / 2,000 / 1,500
Bus-transfer current switching capability	A / V	1,600 / 100	2,400 / 435	2,400 / 435
Creepage distance	mm	6,300 / 7,812	9,450 / 11,250	10,500 / 13,020
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	252 kV	363 kV	420 kV
Disconnector actuator	SRCJ3 motor (three-pole linkage)	SRCJ8 motor (single-pole, three-pole linkage supported)	SRCJ8 motor (single-pole, three-pole linkage supported)
Earthing switch actuator	SRCS manual (synchronous three-pole)	SRCS manual (synchronous three-pole)	SRCS manual (synchronous three-pole)
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	12 s ± 1 s	16 s ± 1 s	16 s ± 1 s

Application Scenarios

Transmission substations：252 kV, 363 kV, and 420 kV busbar and line isolation in national and regional transmission grids
Multi-layer busbar substations：Flexible earthing switch configuration for substations with upper and lower busbar layers
Interconnection substations：363 kV and 420 kV cross-border and regional intertie lines
Phase-selective maintenance：Independent single-pole operation at 363 kV and 420 kV allows one phase to be isolated while the other two remain in service
Power generation switchyards：Generator step-up transformer and transmission line isolation at 363 kV and 420 kV

Order Information

When ordering, specify:

Product model and rated voltage
Rated current and rated short-time withstand current
Operating mechanism type (SRCJ3 or SRCJ8 motor)
Control voltage
Creepage distance requirement
Earthing switch configuration (none, left, right, or both sides)
Busbar layer arrangement (single-layer or multi-layer)
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)

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Frequently asked questions

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.

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.

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ROCKWILL

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

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Company overview

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

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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

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