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Rockwill Standard Recloser
What is the standard of Rockwill Auto Recloser? Rockwill Auto Recloser is a flexib…
Rockwill Standard Recloser

Rockwill Standard Recloser

Detailed description

  • Description
  • Function feature of auto recloser
  • RCW Recloser Feature
  • Recloser Mobile APP software GPRS/GSM/WIFI/BLUETOOTH

What is the standard of Rockwill Auto Recloser?

Rockwill Auto Recloser is a flexible pole mounted outdoor vacuum switching device that can trip and reclose up for a temporary distribution line fault. It reduces the blackout time greatly and improves the stability of power grid operation. The operation status also can be controlled and monitored by mobile phone and SCADA system.

Rockwill standard auto recloser is fully meet the Standard IEC62271-111 & ANSI/IEEE C37.60. Fully follow the above standard for type test and routine test. Additional functions reuirement is offered, like: ESKOM standard, TANESCO standard, BPC standard, SEC standard, DEC, Meralco, KPLC, BREB, etc. Besides, Rockwill even provide with patent design for new recloser.

RCW+ Auto Recloser

RCW+ type auto recloser is ANSI/IEC standardized plus design products which is equipped with one magnetic actuator mechanism, one manual closing/opening/Locking device, 3 current sensors, max 6 voltage sensors, with more functional like protection curves + curves programble, coodination logics + logics  programble,  programble communication protocols(Modbus, DNP3.0, IEC 60870-5-101/104), PC software, APP control tool, etc.

RCW+ type auto circuit recloser is a solid insulation reclosure with zero pressure Sf6 GAS sealed. with high creepage design, higher insulation level,  suit using for Maximum 42kV level sytem. 

It's vacuum interrupting technology, and IP67 IP protection class, It avoid any bad influence high polution enviroment of humidity, salt or alkali incursion or small animal,etc...


Technical Service:

ROCKWILL®, China. Provide with best support

Tel: 0086-577-27869969


Rockwill's recloser gather multi relay protections like:



Cold Load Pickup

Live Load Blocking

Oscillography Capture capability

Programmable Logic

4 Independent Protection Groups

Advanced Automation

Harmonic Protection and Monitoring

Hot Line Tag Capability

Negative Phase Sequence Overcurrent

Inverse Time Protection

Live Line Function & Hot Line Tag Function

Definite Time Protection

Directional Sensitive ground Fault Protection

Two fast-two slow curves

Phase (OV1) & Line-to-Line (OV2) Over Voltage

Temporary Time Addition

Directional over current and ground fault protection

Voltage Protection Element

Phase under-voltage balanced element (UV1)

Logic program-able function

Phase-to-Phase Under-voltage Element (UV2)

Zone Sequence Co-ordination

Loss of Supply (UV3)

High set Instantaneous element

Voltage Sag Protection (UV4 Sag)

Power Quality monitoring including Systems Performance Indices, Voltage Sags and Swells

Voltage reclose control with automatic back feed(restoration provides loop automation functionality)

If you want more functions, pls consult with us

Part Number




Current Sensing

3 x Current Transformers

3 x Current Transformers

3 x Current Transformers

Voltage Sensing

3 x Voltage Sensors

3 x Voltage Sensors

3 x Voltage Sensors

Control Type




ROCKWILL ® Electric strives to bring our customers the latest technology and competitive pricing and best service for distribution automatic.
The RCW series automatic circuit reclosers can use on overhead distribution lines as well as distribution substation applications for all voltage classes 11kV up to 38kV at 50/60Hz power system. and it’s rated current can reach 1250A.
The RCW series automatic circuit reclosers integrates the functions of control, protection, measurement, communication, fault detection, on-line monitoring of closing or opening.

Service environment

Air temperature: Maximum temperature: +85℃; Minimum temperature:-45℃

Humidity: Monthly average humidity 95%; Daily average humidity 90% .
Altitude above sea level: Maximum installation altitude: 2500m or more higher.
Ambient air not apparently polluted by corrosive and flammable gas, vapor etc. No frequent violent shake
Offering With optional classes for rated current range:
--Type RCW12, Rating 6-12 kV with 630A, 16 kA up to 1250A, 20kA;
--Type RCW15, Rating15-20 kV with 630A, 16 kA up to 1250A, 20kA;
--Type RCW27, Rating22-27 kV with 630A, 16 kA up to 1250A, 20kA;
--Type RCW38, Rating30-40.5 kV with 630A, 16 kA up to 800A, 20kA;
With optional classes for different grid application installation: Single phase & Three phase.
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(*).
+Over-voltage protection./Under voltage protection.
+Programable protection relay curves total 10 nos ANSI/IEC curves.
+Cold load pickup protection TCC +Hot line tag
+Earth protection EF/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 60870-5-101 communication protocol support.
IEC 60870-5-104 communication protocol support.(*).
The recloser can communicate through GPRS(Or GSM) modem with English or Specified language (*).
With optional functions for user.
Rated currents, System phase current.
Rated voltages, System phase voltage& secondary low voltage power supply voltage. Frequency, power(kWh),
reactive power(kV arh), 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.

●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.

IEC Curves:

C1 (Standard Inverse)
C2 (Very Inverse)
C3 (Extremely Inverse)
C4 (Long-Time Inverse)
C5 (Short-Time Inverse)
U.S. Curves:

U1 (Moderately Inverse)
U2 (Inverse)
U3 (Very Inverse)
U4 (Extremely Inverse)
U5 (Short-Time Inverse)

● PC software for controller Testing, Setting, programing, Update.

Human friendship interface Programmable Time-Overcurrent curve

● Recloser feature a)Outline of recloser:
The RCW series vacuum recloser is mainly combined with integration terminal, current transformer, permanent magnetic actuator and it’s recloser controller.
b)The recloser tank feature:
The Vacuum recloser tanks are manufactured from 304# grade stainless steel and are powder coated a light grey colour. Whole recloser IP67 protection class, equipped with a auxiliary plug to connect with recloser controller by control cable, Diameter Max22mm, 6 M length (8M for special).
It’s can performance serve more than 20 years long term under heavy duty circumstance.

● Main new advantages of RCW

Visible ON/OFF indicator IP67 class waterproof plug connector

1.Apply ANSOFT design the high performance magnetic actuator,high reliable and free maintenance
2.Manual closing device
3.Automatic Blocking Device for Manual opening
4.Mechanical locking device
5.Electronic locking device
6.Mechanical counter
7.Electronic counter
8.Visble on the ground reflector material mechanical open/closer indicator
9.IP67 inflatable tank SF6 Gas insulation,Pneumatic value,barometer
10.Integral type tank .Lifting lug, Earthing bolt
Note:The above parts are optional devices.Please provide requirement before placing an orde

Primacy incomer terminal (directly connect to interrupter reduce power lost) Current sensor (external modular design easy for quality control and maintenance) Accuracy: ±0.5% Ratio:800/1

Vacuum interrupter(Adopt the APG technology,increasing the whole insulation and weathering performance)
Internal Voltage sensors incorporated within the vacuum interrupter module It's equipped with two voltage sensors,one for measuring the voltage of incoming side,and another one for measuring the voltage of outgoing side.

shielded 4-conductor cable connection  Accuracy:±0.2% Voltage Sensor  Ratio:500/1 or 1000/1

Creepage Distances of RCW

12kV BIL
15kV BIL
38kV BIL
Terminal to terminal creepage
Terminal to ground creepage

Main technical data

N Item
1 Rated max voltage
kV 12 15 27 38
2 Rated current
A 630/800/1250
3 Rated frequency
HZ 50/60
Power frequency 1min
45 55 65 95
30 45 55 80
5 Lightning impulse withstand voltage(peak)
kV 75/95*
6 Rated short circuit breaking current
kA 12.5/16/20/25*
7 Rated short current switching current(peak)
kA 31.5/40/50/63*
8 Rated peak value withstand current
kA 31.5/40/50/63*
9 4S short time withstand current
kA 12.5/16/20/25*
11 Rated operating circulate

10 Breaking current frequency under rated short circuit
time 200
12 Mechanism life
time 10000
13 Secondary loop 1 min power frequency withstand
kV 2
14 Auxiliary voltage supply
Vac 220±20%
15 Battery bank
Vdc 12×2
16 Capacitor unit
Vdc 220

Accessories of RCW

All above insulating components for BIL 200kV expanding using. Any question please contact with our engineer.

Upper voltage shield 3 pcs/set

Standard made of T2 copper material, for 630/1250A rated current using. With  expanding range.

Terminal 6 pcs/set

Map guide&location Monitoring&Controlling

Setting & Modification Event Records

●Master software for Distribution Automation Management

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