Single-phase Vacuum Recloser (Reclosure) Wholesaler-15.6kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Single-phase Vacuum Recloser (Reclosure) Wholesaler-15.6kV
Rated voltage	15.6kV
Rated normal current	400A
Rated short circuit breaking current	12.5kA
Power frequency withstand voltage	60kV/min
Rated lightning impulse voltage	125kV
manual closing	No
Series	RCW

Description

As a pioneering original equipment manufacturer (OEM) in China’s recloser/reclosure industry, we have accumulated decades of R&D expertise, taken the lead in establishing the original industry standards, built a fully independent end-to-end production system, and delivered reliable product solutions for power grid construction.

The 15.6kV Single-phase outdoor Automatic Smart recloser/reclosure is an intelligent outdoor switching device specifically designed for medium-voltage distribution networks. Using vacuum as the arc-extinguishing medium, this equipment can quickly interrupt fault currents and effectively isolate short-circuits, overloads, and other faults in the distribution grid.

It features an automatic reclosing function that restores power supply automatically after fault elimination, significantly reducing power outage time and improving power supply reliability. With its compact and rugged outdoor structure design, it adapts to various harsh natural environments—stable operation in high temperatures, severe cold, high humidity, or sandy conditions—making it a vital device for ensuring safe and efficient operation of medium-voltage power lines.

Rows of outdoor vacuum reclosers ready for shipment at a professional Vacuum Recloser supplier factory.

Key Features

High-efficiency Arc Extinguishing Performance

Adopting vacuum arc extinguishing technology, it features strong insulation and rapid arc extinction. It prevents arc reignition, extends the equipment's service life, and reduces maintenance costs.

Precise Automatic Reclosing

Automatically closes the circuit according to the preset program. It can distinguish between transient and permanent faults. For transient faults, it restores power supply rapidly; for permanent faults, it locks immediately to minimize the power outage scope.

Excellent Environmental Adaptability

With a high-strength and corrosion-resistant outer shell and internal protective treatment, it can operate stably in harsh environments, adapting to temperatures ranging from -40°C to +70°C.

Intelligent Monitoring and Remote Control

It can monitor key parameters such as current and voltage in real-time and upload data. Supporting remote opening and closing operations, it improves fault handling efficiency and the intelligent level of grid operation and maintenance.

High Safety and Reliability

Equipped with complete mechanical and electrical interlocking devices to prevent misoperation, it has a long-life design with tens of thousands of mechanical operation cycles, ensuring stable power supply.

Controller Instruction

This recloser controller offers a variety of optional relay protection logics including over‑current, negative‑sequence, directional, over‑/under‑voltage and earth‑fault protection, with support for ANSI/IEC curves and customizable functions.

Equipped with RS‑232/RS‑485 interfaces and multiple power communication protocols, it supports GPRS/GSM communication, allows pre‑programming of reclosure parameters, and provides electrical parameter measurement together with up to 10 000 SOE event and fault records.

Single-phase outdoor Automatic Smart recloser/reclosure Controller Instruction

Time‑Overcurrent Curves

The following information describes the curve timing for the curve and time dial settings made for the time‑overcurrent elements. The time‑overcurrent relay curves in conform to IEEE C37.112‑1996 IEEE Standard Inverse‑Time Characteristic Equations for Overcurrent Relays.

Single-phase outdoor Automatic Smart recloser/reclosure

Parameters

Rated maximum voltage	15.6kV
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 Silicone rubber pole (unable the gas)）	60kV
Rated lightning impulse voltage（Single-phase Silicone rubber pole (unable the gas)）	125kV
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 Silicone rubber pole (unable the gas)）	≤1
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 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

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

Reference Projects for outdoor vacuum recloser

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

Rockwill
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

Rockwill
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-

Rockwill

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FAQ for outdoor vacuum recloser

Does Rockwill offer an MV Smart Auto Recloser capable of measuring primary currents as low as 0.1A?

Yes. In addition to the standard 2A–16,000A range, Rockwill provides custom-configured units for ultra-low current measurement and protection in the 0.1A–2A range.

How to select current sensor or current transformer specifications for Rockwill Smart Recloser?

The Rockwill standard smart recloser offers high precision with a wide measuring range (2A–16,000A). Simply ensure your normal current is within this standard range when making a selection.

What are the key differences between Rockwill's RCW single-phase vacuum recloser and a ZW32-type VCB?

While the ZW32 is a basic circuit breaker requiring an external controller, the RCW is a fully integrated smart grid recloser with built-in protection, sensors, and communication.

Furthermore, the RCW strictly complies with IEC 62271-111 and ANSI C37.60 standards, featuring premium insulation tailored for international distribution automation projects.

Does Rockwill single-phase vacuum recloser provide OEM/ODM services for local partners and regional manufacturers?

Yes, Rockwill provides comprehensive OEM/ODM programs for the RCW single-phase vacuum recloser. To maintain our high quality standards, we partner exclusively with regional manufacturers and distributors who possess robust engineering expertise and local service capabilities.

Our goal is to build strategic alliances that deliver not just premium hardware, but exceptional local technical support for smart grid modernization.

Why does the RCW single-phase vacuum recloser adopt 10,000 SOE event storage?

Distribution network faults occur occasionally with long data accumulation cycles. RCW single-phase vacuum reclosers are installed on overhead poles and may only encounter faults once every several months or years.

Conventional controllers can only store hundreds of records and old data will be overwritten by new events. The 10,000-point large-capacity SOE storage prevents the loss of early fault records, preserving complete time-sequenced event logs for later analysis.

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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.