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OEM Automatic Circuit Recloser (ACR) for Overhead Line Protection -27kV 38kV

  • OEM Automatic Circuit Recloser (ACR) for Overhead Line Protection -27kV 38kV

Key attributes

Brand ROCKWILL
Series RCW
Rated voltage 27kV
Rated continuous current 630A 800A
Rated frequency 50Hz
Standard IEC62271-111
Description

This 27kV‑38kV pole‑mounted Automatic Circuit Recloser (ACR) delivers reliable protection and switching control for outdoor overhead distribution lines. Adopting magnetic actuator and vacuum arc‑extinguishing technology, it uses one single magnetic actuator to drive three‑phase vacuum interrupters synchronously, with fewer mechanical failure points, higher stability and longer service life.

The vacuum interrupters are integrally encapsulated in hydrophobic epoxy resin housing, featuring high dielectric strength, anti‑pollution and hydrophobic performance for harsh outdoor conditions. Housed inside a corrosion‑resistant powder‑coated tank, the magnetic actuator and transmission components can withstand high humidity, heavy pollution and extreme temperatures for long‑term maintenance‑free operation.

Description of Controller

The Microprocessor based controller provides protection, control, monitoring, instrumentation and metering with integrated input and output logic, data logging & fault report.Communication functionality of the controller is achieved via electrical RS485 port for remote connection. Additional rear ports including RS232 are available for selection.

The Feeder Terminal Unit(FTU) is the core of controller. To prevent any damage to FTU from emergency, the control cubicle contains auxiliary power supply of batteries for uninterruptible power supply, electronic boards and circuit breakers.

A series of protection functions can be set via screen display.

 Controller

Protection

  • Protective Functions
  • Phase time overcurrent protection (51P)
  • Phase instantaneous overcurrent protection (50P-1)
  • Two definite time overcurrent settings (50P-2, 50P-3)
  • Ground overcurrent protection (51N)
  • Ground instantaneous overcurrent protection (50N-1)
  • Two definite time ground overcurrent settings (50N-2, 50N-3)
  • Negative sequence overcurrent protection (46)
  • Phase and ground directional overcurrent protection ( 67P, 67N;)
  • Over-frequency (810, 81V)
  • Undervoltage and overvoltage control and alarm (27, 59;)
  • Up to four reclose cycles (define a recloser cycle 79-1 79-5; ) close fourtimes / trip five
  • Adaptive reclosing shots: each reclose sequence allows independent programming of protective functions Sensitive Earth Fault protection

Current input

Current input
Measuring range: 0-99A
Power consumption: Rated 5A, each phase is not greater than 0.5VA
Rated 1A, each phase is not greater than 0.2VA
Rated at 0.2A, not more than 0.1VA per phase
Overload capacity: 3 times the rated current, continuous work
20 times the rated current for 4s
50 times the rated current for 1s
 
Category Item Specification
Analog Voltage Input Measuring range 0~3V
Power consumption Per phase ≤ 0.3 VA
Overload capacity 1.4× rated value, continuous operation
Output Continuous carrying current 5A
Switching capacity DC inductive load, L/R=40ms, 220V/0.5A
Contact debounce time 1~99ms, step 1ms
RS485/RS232 Baud rate 1200‑38400 bps
Default baud rate 9600 bps
Communication protocol Modbus RTU, IEC 60870‑5‑101, DNP3.0
Ethernet Port (Only for BC500 Controller) Mode 10/100M adaptive
Interface RJ45
Communication protocol Modbus TCP/IP, DNP3.0, IEC 60870‑5‑104
Control Cabinet Integrated components Equipped with protection relay and on‑device UPS system
Optional functions Additional components and functions are available on request

Dimension

27kV External Dimension

27kV External Dimension

38kV External Dimension

38kV External Dimension

Normal Service Conditions

Ambient air temperature — upper limit +40 °C
Ambient air temperature — 24 h average +35 °C
Ambient air temperature — lower limit –25 °C
Altitude above sea level ≤ 1 000 m
Relative humidity — 24 h average ≤ 95% (at +40 °C)
Relative humidity — monthly average ≤ 90%
Water vapour pressure — 24 h average ≤ 2.2 kPa
Water vapour pressure — monthly average ≤ 1.8 kPa
Solar radiation ≤ 1 000 W/m²
Wind speed (outdoor) ≤ 34 m/s (mild)
Pollution degree Class III
 

Solutions - Automatic Circuit Recloser

  • Integrated Sandstorm Defense Solution with Recloser Upgrades for Northern Nigeria
    Project Background: Nigeria's Intensifying Sandstorm ChallengNorthern Nigeria (e.g., Kano, Ogun States) confronts severe desertification threats (63% land area), enduring over 60 annual Sandstorm events originating from the Sahara. Dust infiltration causes:• Equipment Damage: Sandstorm-driven particulate corrosion triggers 40% higher failure rates in power infrastructure. Industrial line shutdowns cost Nigeria’s economy >$10M yearly.• Economic Erosion: Farmland degradation and forced relocati

Case Studies - Automatic Circuit Recloser

  • DTEK Grid Upgrade: Operation of Rockwill 10kV Smart Recloser in -40°C Extreme Cold Environment Ukraine Case Study
    As a benchmark for Chinese‑manufactured medium‑voltage distribution equipment going global, Rockwill established in‑depth cooperation with DTEK Kyiv Power Grid, Ukraine. Tailored outdoor vacuum recloser solutions were mass‑deployed to address existing weaknesses in local 10 kV distribution networks, comprehensively improving regional power supply reliability and automation to build a flagship distribution grid modernization project in Kyiv.01 Project Background: Core Pain Points of DTEK Kyiv Dis
  • 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-

Related Blogs - Automatic Circuit Recloser

  • Rockwill RCW Series Automatic Circuit Reclosers: World-Class Technology & Global Track Record
    The Rockwill RCW Series Automatic Circuit Reclosers are intelligent Automatic Circuit Reclosers (ACR) fully compliant with both IEC 62271-111 and ANSI/IEEE C37.60 international standards, covering the full voltage range from 11kV to 38kV for 50/60Hz power systems. As a pioneer in China's recloser sector and a leading medium-to-high voltage power equipment original manufacturer, Rockwill serves over 100 countries worldwide, offering a Chinese-origin solution that competes head-to-head with intern

Documentation Resource Library Automatic Circuit Recloser

Public.
High-performance 27kV Automatic Circuit Recloser (ACR) Flyer High-performance 27kV Automatic Circuit Recloser (ACR) Flyer
Brochure
English
Public.
Rockwill Electric Group Profile Rockwill Electric Group Profile
Brochure
English
Restricted
RCW MV outdoor vacuum recloser installation manual RCW MV outdoor vacuum recloser installation manual
Operating Instruction
English
PDF

Certifcations Automatic Circuit Recloser

Frequently asked questions

Yes. Rockwill vacuum recloser 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.

This 35kV outdoor high‑voltage automatic recloser is applicable to 3‑phase AC 50Hz power systems. It can reliably switch load current, overload current and short‑circuit current.
Equipped with an intelligent controller and electronic PT power supply, it supports multi‑times automatic reclosing and provides three‑stage composite protection including overcurrent delay, inrush current delay and fast short‑circuit breaking, effectively ensuring safe and stable operation of distribution networks.

Two types: magnetic actuator (M/G, mechanical life 30000 times) and spring mechanism (N, mechanical life 10000 times). Magnetic type can add manual closing function with code “C”.

Yes, both single‑phase and three‑phase reclosers are available. It can be installed on single/double poles for overhead lines or inside distribution substations.

It integrates control, overcurrent protection, measurement, communication, fault detection and online opening‑closing monitoring, matched with dedicated recloser controller.

Know your supplier

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: 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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