Three-phase Smart Vacuum recloser/reclosure with Controller-27kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Series	RCW
Rated voltage	27kV
Rated normal current	1250A
Rated peak value withstand current	31.5kA
Rated lightning impulse voltage	150kV

Description

Rockwill RCW series automatic circuit reclosers are designed for overhead distribution lines and distribution substations, providing reliable fault interruption and automatic reclosure to minimize outage time. Integrating control, protection, measurement, communication, fault detection, and real-time monitoring of closing and opening operations, they deliver a comprehensive distribution automation solution.

Built around an integration terminal, current transformer, permanent magnetic actuator, and dedicated recloser controller, the solid-dielectric design is maintenance-friendly and suited to outdoor pole mounting. Configuration and standards are customizable on request.

Product Showcase Video

Features

Flexible Current Ratings: Optional ratings within the rated current range to suit diverse application needs.
Customizable Protection: A variety of optional relay protection and logic schemes for users to choose from, ensuring adaptability to different system requirements.
Versatile Communication: Optional communication protocols and I/O ports available, enabling seamless integration with various monitoring and control systems.
User - Friendly Software: Equipped with PC software that supports controller testing, setup, programming, and updates, simplifying operation and maintenance.

Parameters

Item	Specification
Rated maximum voltage	27kV
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 (Three-phase Silicone rubber pole (unable the gas))	70kV
Rated lightning impulse voltage (Three-phase Silicone rubber pole (unable the gas))	150kV
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 (Three-phase Silicone rubber pole (unable the gas))	≤3
Opening time	≤30ms (Magnetic actuator)
Closing time	≤40ms (Magnetic actuator)
Minimum creepage distance	31, level4 (mm/kV)
Minimum distance between phases	380mm
Potential transformer	110/220V (Customized)
Cable length	6,8,12m (Customized)
Cable clamp (Three-phase Silicone rubber pole (unable the gas))	2-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

Actual Product Photos of Three-Phase Smart Vacuum Recloser

Site Operation Photo

Three-phase Smart Vacuum recloser/reclosure Site Operation Photo

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

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DTEK Grid Upgrade: Operation of Rockwill 10kV Smart Recloser in -40°C Extreme Cold Environment Ukraine Case Study

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Rockwill Ukraine 186 Units 12kV Outdoor Vacuum Recloser Project Success Case

In response to the operational characteristics of Ukraine’s local power grid and targeting harsh high-latitude outdoor working conditions, we rely on core technologies of intelligent reclosing and self-healing to precisely adapt to the complex grid environment with frequent thunderstorms and drastic diurnal temperature variations, steadily promoting the automatic and intelligent upgrade of regional rural power grids and suburban distribution networks.01 Project Overview1.1 Project BackgroundIn 2

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Successful Case of 170 Sets of 11kV Automatic Recloser Project in Kenya

Against the backdrop of quality upgrading for Kenya’s urban and rural power grids, 11kV auto-reclosers deliver reliable performance to suit local climates and grid conditions. It enables rapid fault isolation and efficient operation and maintenance, forming a core safeguard for the upgrading of Kenya’s urban and rural distribution networks.01 Project Overview1.1 Project BackgroundIn May 2023, 170 sets of 11kV Automatic Reclosers (Model: RCW12M) were officially supplied and applied to the medium-

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Documentation Resource Library Vacuum recloser

Public.

RCW-E38M/1250-20 MV Outdoor Vacuum Recloser

Drawings

English

PDF

Public.

DEKRA Recloser Test Report

Test Report

English

PDF

Restricted.

SEC SPECIFICATIONS FOR SMART MV AUTO-RECLOSER

Others

English

Consulting

Restricted.

Specification for 33kV Vacuum Automatic Recloser by Kenya Power and Lighting Company Limited (KPLC)

Others

English

Consulting

Restricted.

15kV/27kV/38kV outdoor auto break vacuum recloser brochure

Brochure

English

Consulting

Restricted.

10 to 38kV auto vacuum break recloser Catalog

Catalogue

English

Consulting

Public.

27kV automatic recloser technology specification

Technical Data

English

PDF

FAQ for Vacuum 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 really provide a 10-year quality warranty and free replacement?

Yes. Rockwill stands behind the RCW series with one of the most comprehensive warranties in the recloser industry: a full 10-year warranty covering the complete recloser, including the vacuum interrupter, permanent magnet operating mechanism, and control electronics. Any failure resulting from material or manufacturing defects during the warranty period is eligible for free replacement. Our warranty terms are straightforward and transparent, with no hidden conditions or complex exclusions, giving you complete peace of mind.

Q: Does Rockwill offer a cost-effective alternative that is more budget-friendly than the standard RCW+ series?

Yes. The RCWP, a cost-optimized option in the RCW+ series, features dual sensors, flagship controller, and 30,000 operations with permanent magnet three-phase linkage, while offering downgrade options (lock box removal, lockout removal, sensor/controller downgrade) so customers pay only for what they need.

$3600.00

Pricing calculator

PDF

RCW-E38M/1250-20 MV Outdoor Vacuum Recloser

PDF

DEKRA Recloser Test Report

PDF

27kV automatic recloser technology specification

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.