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GTRM-12 Solid insulated ring main unit

GTRM-12 Solid insulated ring main unit can be used in a variety of environmental conditions, especially for high altitude, day and night temperature changes in the area, because it uses solid epoxy resin as the main insulating medium, will not affect the surrounding environment, compared with SF6 gas insulated ring main unit, it has the use of environmental protection and other features. GTPM-12 Solid insulated ring main unit is widely used. It can be used indoors or outdoors alone, and can also be integrated in high and low voltage pre-installed substation.

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Overview

Description

The GTRM-12 solid-insulated ring main unit is a versatile and robust solution that operates efficiently in a variety of environmental conditions. It is particularly suitable for high-altitude areas and environments with significant diurnal temperature variations. This adaptability is primarily attributed to its use of solid epoxy resin as the main insulating medium, which not only provides excellent electrical insulation performance but also ensures that the equipment does not adversely affect the surrounding environment.
 Compared to traditional SF6 gas-insulated ring main units, the GTRM-12 stands out for its environmentally friendly features. Its robust insulation eliminates the risk of gas leakage, making it a safer choice for both operators and the ecosystem. In today’s energy landscape, where sustainable development is a key consideration, this commitment to environmental protection is particularly important.
 The GTPM-12 solid-insulated ring main unit is designed for versatility and flexible installation. It can be deployed indoors or outdoors, suitable for various environments ranging from urban infrastructure to remote areas. Furthermore, it can be seamlessly integrated into prefabricated high and low voltage substations, providing a comprehensive solution for power distribution needs. With its robust design and environmental advantages, the GTPM-12 is an ideal choice for utilities and industrial companies that prioritize sustainability while improving operational efficiency.

Model And Meaning

GTRM-12 Solid insulated ring main unit (5)

Features

Safe fully insulated and fully sealed design

GTRM-12 Solid insulated ring main unit is the primary circuit components sealed in a solid epoxy resin box, with solid insulating material as the main insulating medium. The Incoming and outgoing ends can be connected by cable plug heads, so as to ensure that the ring cabinet is fully insulated and sealed, and not affected by the external environment.

Standard modular design

Ring main unit adopts unit modular design, which is divided into load switch unit, load switch-fuse combination electrical unit, circuit breaker unit, busbar PT unit, cable lifting unit and metering unit, etc. Different unit modules can realize free combination.

Flexible extended design

It can be composed of a variety of standard modules, but also can be designed into a combination of different modules into an expandable unit, through the special busbar connector, to achieve a variety of unit combination, to maximize meet the complex and diverse power supply and distribution design schemes in various regions.

Intelligent design

GTRM-12 Solid insulated ring main unit has intelligent design, can integrate partial discharge sensor, humidity sensor and wireless humidity sensor, and through the coordination with distributed DTU or centralized DTU, so as to realize the remote communication, telemetry, remote control and other distribution network automation functions of primary equipment.

GTRM-12 Solid insulated ring main unit (6)
GTRM-12 Solid insulated ring main unit (3)

Installation conditions

Altitude: ≤ 4500m;

Environment temperature :-40℃ ~+40℃ , the average temperature within 24 hours does not exceed 35℃ ;

Environment humidity: Daily average ≤ 95%, monthly average ≤ 90%;

Installation environment: No violent vibration and impact, and no fire, explosion risk place;

Seismic capacity :8 degrees, ground horizontal acceleration ≤ 0.4g, ground vertical acceleration ≤ 0.2g.

Note: If the operating environment exceeds the above range, please contact our company.

Technial Parameters

Item Unit Load

switch unit

 Combined

electrical unit

 Circuit breaker unit
Rated voltage kV 12 12 12
Rated frequency Hz 50 50 50
Rated current A 630 125 630
1min Power frequency voltage resistant Phase-to-phase and Phase-to-ground kV 42 42 42
Isolating fracture kV 48 48 48
Lightning shock

withstand voltage

 Phase-to-phase and Phase-to-ground kV 75 75 75
Isolating fracture kV 85 85 85
Auxiliary circuit and control circuit power frequency withstand voltage kV 2 2 2
Rated short-time withstand current kA 20 – 20
Rated short-time duration s 4   4
Rated peak withstand current kA 50 – 50
Rated short-circuit breaking current kA – 31.5 20
Rated short-circuit closing current kA 50 50 50
Rated transfer current A – 1700 –
Rated active load breaking current A 630 – 630
Rated closed-loop breaking current A 630 – 630
Rated cable charging breaking current A 10 – 15
Mechanical life Load switch/

circuit breaker

  

Times

 5000 5000 10000
Isolation switch/

earthing switch

 3000 3000 3000
Circuit resistance protection μΩ ≤ 150 – ≤ 150
Grade Cabinet body IP4X

Overall dimension diagram

GTRM-12 Solid insulated ring main unit (4)

Products are exported to more than 100 countries and regions such as Africa, the Middle East, and the United Kingdom Europe. It is a well-known brand and manufacturer of mechanical switches in China.
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