25kV SF6 Ring Main Unit Switchgear
Key attributes
| Brand | ROCKWILL |
| Model NO. | 25kV SF6 Ring Main Unit Switchgear |
| Rated voltage | 24kV |
| Rated frequency | 50/60Hz |
| Series | RMU |
Product descriptions from the supplier
Description
The SF6 insulated switchgear is suitable for middle voltage power distribution system with a rated voltage of 11kV and 40.5kV. It could be used as RMUs in a power supply network, fault isolating switches and sectionalizing switches. If equipped with distribution automation devices (FTU/DTU) and communication devices, the SF6 insulated switchgear could communicate with the control center, measure the cable voltage, current, etc, and monitor the working status of
SF6 gas insulated ring main unit(RMU/C-GIS)
Safe ring/plus RMR type SF6 gas insulated ring main unit is integrating with SF6 infill cabinet which gather with LBS, VCB, Fuse, ES, DS, etc.
By the perfect integration of stationary type and flexible expansion, RMR type SF6 gas-insulating compact close metal switchgear(Ring main unit) with the adoption of the modular design, is suitable for end-user or network node, meanwhile meets the requirement of all kinds of switching substations cabinet-type transformer substations and cable branch cabinets. It characters on its compact structure, safety and reliability, longevity and maintenance free.
This product is in conformity with the standards of IEC60420,
Technical data
Item |
Unit |
Switch |
Rated voltage |
kV |
24 |
Power frequency withstand voltage |
kV |
50 |
Impulse withstand voltage |
kV |
125 |
Rated current |
A |
630 |
active load |
A |
630 |
closed loop |
A |
670 |
off load cable charging |
A |
141 |
earth fault |
A |
160 |
earth fault cable charging |
A |
91 |
Making capacity |
kA |
40 |
Short time current 3 sec |
kA |
16 |
Environmental Conditions
Suitable Altitude: ≤2000mSuitable
Temperature: -40℃ ~ +55℃Relative
Humidity: Daily mean ≤95%, monthly mean ≤90%
Gradation of Earthquake Damage: ≤ Level 8
Product feature
Panel structure: The panel body is enclosed by 2mm aluminium-zinc plated steel plate after multi-bending. It is simple, firm, delicate and peculiar.
Busbar compartment: The busbar compartment is located in the top and connect with neighhboring panel.
Load break switch is a separated unit with SF6 gas.
Cable compartment: Approximate 75% room of connecting cable and installing fuse, earthing switch and PT.
Mechanism chamber and interlock: The chamber consists of operating mechanism, mechanism interlock, position indicator, auxiliary contact trip coil, charge indicator and interlock.
LV chamber: It is lockted in the top. It mainly used for installing instrument, relay and motor.
Circuit breaker compartment: The circuit breaker (SF6 or Vacuum) is located below load break switch.
Related Products
-
3.6kV 7.2kV 12kV 24kV indoor metal-clad withdrawable switchgear
-
12kV SF6 insulated switchgear/power distribution ring main unit
-
14.4kV 15kV 15.5kV 15.6kV Intelligent Electrical Solid Insulated Switchgear /Ring Main Unit
-
40.5kV 44kV 45kV 46kV 66kV The compact Solid Insulated Metal-Enclosed Ring Main Unit/ Switchgear
-
10.5kV 11kV 11.5kV 12kV Indoor Solid Insulated Ring Main Unit/RMU
-
30kV 33kV 33.5kV 34.5kV 35kV Solid Insulated Ring Main Unit/switchgear Original Manufacturer
-
10.5kV 11kV 11.5kV 12kV Solid Insulated Ring Main Unit/Switchgear source manufacturer
Related Knowledges
-
Faults and Handling of Single-phase Grounding in 10kV Distribution LinesCharacteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in01/30/2026 -
Neutral point grounding operation mode for 110kV～220kV power grid transformersThe arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi01/29/2026 -
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr01/29/2026 -
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I01/29/2026 -
Understanding Transformer Neutral GroundingI. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit01/29/2026 -
What’s the Difference Between Rectifier Transformers and Power Transformers?What is a Rectifier Transformer?"Power conversion" is a general term encompassing rectification, inversion, and frequency conversion, with rectification being the most widely used among them. Rectifier equipment converts input AC power into DC output through rectification and filtering. A rectifier transformer serves as the power supply transformer for such rectifier equipment. In industrial applications, most DC power supplies are obtained by combining a rectifier transformer with rectifier equ01/29/2026
Related Solutions
-
Intelligent Operation Solution for 12kV Vacuum Circuit Breakers: Integrating Real-time Monitoring & Lifetime OptimizationⅠ. Equipment Operation & MaintenanceIntelligent Monitoring System IntegrationMulti-parameter Real-time Monitoring: Embedded sensors (temperature, displacement, Hall effect current sensors) track contact temperature rise, mechanical characteristics (opening/closing speed, overtravel), coil current, and partial discharge signals. Data undergoes preprocessing via edge computing prior to cloud upload.Lifetime Prediction Model: Dynamically evaluates remaining lifespan using electrical wear data06/10/2025 -
SF6 Circuit Breaker Solutions for Outdoor Installation (Anti-Pollution & Seismic Resistance)I.Core Challenges in Outdoor InstallationIn high-voltage transmission and distribution systems, SF6 circuit breakers are exposed to complex outdoor environments for extended periods, facing the following critical issues:Pollution & Insulation DegradationDust, salt fog, and industrial pollutants in outdoor environments easily adhere to equipment surfaces. In coastal or industrial areas, pollution levels may reach Class IV, resulting in insufficient creepage distance and triggering flasho05/12/2025 -
12kV Indoor Vacuum Circuit Breaker Southeast Asia Solution: Anti-Corrosion Compact Design12kV Indoor Vacuum Circuit Breaker Southeast Asia Solution: Anti-Corrosion Compact DesignⅠ. Executive SummarySoutheast Asia faces rapidly growing electricity demand alongside environmental challenges including high temperatures, humidity, salt spray corrosion, and grid instability. This solution recommends Solid Insulated Pole-Mounted Vacuum Circuit Breakers (VCB) featuring high reliability, compact design, and smart monitoring. Tailored for tropical climates and industrial scenarios, it06/10/2025
