Single-phase vacuum Auto Circuit recloser for rural lines-21.9kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Single-phase vacuum Auto Circuit recloser for rural lines-21.9kV
Rated voltage	21.9kV
Rated normal current	400A
Rated short circuit breaking current	12.5kA
Power frequency withstand voltage	85kV/min
Rated lightning impulse voltage	185kV
manual closing	No
Series	RCW

Description

As a pioneering OEM in China's recloser sector, we leverage decades of R&D expertise to set industry benchmarks, operate a fully autonomous production system, and deliver reliable solutions for power grid projects.

The RCW series automatic circuit recloser is specifically designed for 21.9kV overhead distribution lines and substation applications in 50/60Hz power systems. It integrates control, protection, measurement, communication, fault detection, and online monitoring of switching status. The RCW series combines a vacuum interrupter, current transformers, a permanent magnetic actuator, and an intelligent controller into a compact, high-performance unit.

Single-phase Outdoor Vacuum Reclosers Controller

This recloser is highly customizable, offering a wide range of relay protection logics (such as instantaneous/timed over-current, directional over-current, zero-sequence/earth fault protection, and programmable ANSI/IEC curves) as well as comprehensive communication protocols (RS-232/485, DNP3.0, Modbus, IEC 60870-5-101/104, and GPRS).

It also allows users to customize rated parameters and reclosing intervals, and features an event recording capacity of up to 10,000 records, including fault and normal operation logs.

Single-phase vacuum Auto Circuit recloser Controller

Features

Voltage Versatility: Compatible with 21.9kV/22kV/24kV/25.8kV MV systems, ideal for diverse outdoor power grid scenarios.
Single-Phase Vacuum Technology: Adopts vacuum interrupter structure, ensuring zero arc leakage and reliable short-circuit breaking performance.
Automatic Reclosing Function: Realizes multiple auto-reclosing cycles, effectively reducing power outage time and improving grid stability.
Outdoor-Ready Design: IP66-rated enclosure (customizable) with corrosion-resistant coating, suitable for harsh environmental conditions like high humidity and extreme temperatures.
Source Manufacturer Advantage: Full-chain independent R&D and production, customizable parameters to meet regional grid standards and project requirements.
High Mechanical & Electrical Life: Long service life with 10,000+ mechanical operations, minimizing maintenance costs for power utilities.

PC software for controller Testing, Setting, programing, Update

RWK351 tool: Configure, Manage, Control and Design. Protection and Communications Configuration tools for ROCKWILL’s Products

Configuration Management Software‑ Class defining protection settings management for ROCKWILL devices. Locally and Remotely configure and control ROCKWILL Reclosers.

Single-phase vacuum Auto Circuit recloser for controller Testing

Parameters

Rated maximum voltage	21.9kV
Rated maximum current	1250A
Rated frequency	50Hz
Rated short circuit breaking current	12.5kA
Rated peak value withstand current	31.5kA
Rated 1min power frequency withstand voltage (Single-phase Epoxy resin pole)	85kV
Rated lightning impulse voltage (Single-phase Epoxy resin pole)	185kV
Operation sequence	C-0.5-CO-2-CO-5-CO（Magnetic actuator）
Mechanical life	n:30000（Magnetic actuator）
Power supply and operating voltage	110/220V (Customized)
Ratio of current transformer	400/1A (Customized)
Number of voltage sensors (Single-phase Epoxy resin pole)	≤2
Opening time	≤20ms（Magnetic actuator）
Closing time	≤30ms（Magnetic actuator）
Minimum creepage distance	31, level4（mm/kV）
Minimum distance between phases	360mm
Potential transformer	110/220V (Customized)
Cable length	6,8,12m (Customized)
Cable clamp (Single-phase Epoxy resin pole)	4-hole NEMA
Lightning arrester	≤6
Mounting type	Single / double column

With optional relay protection & logics for user choice	Instantaneous over-current protection Timing over-current protection Negative sequence over-current protection Directional over-current protection(⁽¹⁾) Over-voltage protection / Under voltage protection Programmable protection relay curves (total 10 nos ANSI/IEC curves) Cold load pickup protection TCC + Hot line tag Earth protection E/F SEF + Zone- Sequence Co-ordination More relay functions can be customized
With optional communication protocols & I/O port for user choice	RS-232 and RS-485 ports supporting DNP3.0 communication protocol support Modbus communication protocol is optional IEC 60870-501 communication protocol support IEC 60870-5-104 communication protocol support The recloser can communicate through GPRS(or) GSM(or) GPRS/GSM module with English or Specified language
With optional functions for use	Rated currents, System phase current, Rated voltages, System phase voltage and secondary low voltage power supply voltage Frequency power (kWh), reactive power (kVarh), power factor
With optional reclosing interval for user pre-program	reclosing times setting support Dead time setting support
With events recording function	SOE 10000 operations record Fault record and normal operation record Note：mean should customized by manufacturer if needed

External dimensions

Single-phase vacuum Auto Circuit recloser External dimensions

Environmental requirement

Maximum temperature:	+40°C
Minimum temperature:	-30°C
Monthly average humidity	95%
Humidity:	90%
Above sea level:	2500m or higher
Ambient air Not apparently polluted by corrosive and flammable gas, vapor

Documentation Resource Library outdoor vacuum Auto Circuit recloser

Restricted.

10 to 38kV auto vacuum break recloser Catalog

Catalogue

English

Consulting

Public.

27kV automatic recloser technology specification

Technical Data

English

PDF

FAQ for outdoor vacuum Auto Circuit recloser

Q: What are the key differences between Rockwill's RCW series recloser and a ZW32-type vacuum circuit breaker?

The ZW32-type VCB is a basic circuit breaker or demarcation switch without built-in auto-reclosing logic, whereas the RCW series is specifically engineered as a full-function recloser with integrated protection, sensors, and communication for smart grid applications.

Unlike the ZW32, which requires an external controller for automation, the RCW series complies with IEC 62271-111 and ANSI C37.60, and is supported by complete type test reports.With silicone rubber or epoxy insulation offering superior aging resistance and low water absorption, the RCW series is the professional choice for international distribution automation projects.

Q: Does Rockwill provide OEM/ODM services for local partners and regional manufacturers?

Yes. Rockwill provides a comprehensive OEM/ODM program for the RCW series reclosers. However, we are very selective in our partner selection — we specifically seek manufacturers and local partners with strong technical capabilities, solid engineering background, and local service capacity. Our goal is to partner with entities that can not only distribute but also provide local technical support to promote our advanced technology.

$5000.00

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27kV automatic recloser technology specification

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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.