Intelligent Solid Insulated Switchgea
Zhejiang Tianrun Electric Co., Ltd. is one of the leading manufacturers and suppliers of intelligent solid insulated switchgea in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced intelligent solid insulated switchgea from our factory. Also, quotation is available.
Product Overview
The TR-GTXGN-12 intelligent solid insulated switchgear is a three-phase, 50 Hz, 12 kV solid insulated vacuum switchgear for receiving and distributing electrical energy in distribution systems. The high-voltage live parts (vacuum interrupters, main circuit conductors and insulation supports) are encapsulated as a whole by epoxy resin casting, and the functional units are connected by fully insulated solid busbars, forming a fully insulated and fully sealed construction. This construction is not sensitive to external factors such as condensation and contamination, which helps operating stability and operator safety. The product is manufactured in accordance with IEC 62271-200 and IEC 62271-1, and routine maintenance is limited under normal operating conditions.
Product Features
SF6-free
Live parts are encapsulated in solid insulating materials with no gas filling, and SF6 emission management is not involved.
Simple maintenance
Under normal operating conditions, no gas pressure monitoring or refilling is required, so routine work is limited.
Environmental adaptability
Solid insulation is not affected by condensation or humidity, suiting humid locations with large temperature swings.
Compact design
Switch elements are encapsulated and assembled as an integrated unit, giving a smaller footprint for confined spaces.
Flame-retardant
Epoxy resin is a flame-retardant material; no oil and no gas leakage risk.
Operating safety
Live parts are fully insulated and sealed, with mechanical interlocking and voltage presence indicators.
Type Designation
Technical Parameter
|
Item |
Unit |
Circuit-breaker Unit |
Switch-disconnector Unit |
|
Rated voltage |
kV |
12 |
- |
|
Rated frequency |
Hz |
50 |
- |
|
Rated current |
A |
630 |
- |
|
1 min power-frequency withstand voltage - to earth and between phases |
kV |
42 |
- |
|
1 min power-frequency withstand voltage - across isolating distance |
kV |
48 |
- |
|
Lightning impulse withstand voltage - to earth and between phases |
kV |
75 |
- |
|
Lightning impulse withstand voltage - across isolating distance |
kV |
85 |
- |
|
Rated short-time withstand current and duration - main circuit |
kA |
20/4 s |
- |
|
Rated short-time withstand current and duration - earthing circuit |
kA |
17.4/2 s |
- |
|
Rated peak withstand current - main circuit |
kA |
50 |
- |
|
Rated peak withstand current - earthing circuit |
kA |
43.5 |
- |
|
Rated short-circuit making current (peak) |
kA |
50 |
- |
|
Rated short-circuit breaking current |
kA |
20 |
/ |
|
Number of rated short-circuit breaking operations |
Times |
30 |
/ |
|
Rated operating sequence |
- |
O-0.3 s-CO-180 s-CO |
|
|
Rated cable / line charging breaking test |
- |
Class C2 |
/ |
|
Breaking current of double earth fault |
kA |
17.4 |
/ |
|
Rated active load breaking current |
A |
/ |
630 |
|
Rated closed-loop breaking current |
A |
/ |
630 |
|
Rated cable charging breaking current |
A |
/ |
10 |
|
5 % rated active load breaking current |
A |
/ |
31.5 |
|
Making operations of earthing switch |
Times |
5 |
|
|
Main circuit resistance |
μΩ |
≤ 140 |
|
|
Rated gas pressure (gauge pressure at 20 °C) |
MPa |
0.02 |
|
|
Mechanical endurance - vacuum circuit-breaker |
Times |
10000 |
|
|
Mechanical endurance - disconnector |
Times |
3000 |
|
|
Mechanical endurance - earthing switch |
Times |
3000 |
|
|
Degree of protection - enclosure |
- |
IP4X |
|
|
Degree of protection - gas tank |
- |
IP67 |
|
|
Operating power supply |
V |
AC220/DC220/DC110/DC48/DC24 |
|
|
Rated annual gas leakage rate |
% |
≤ 0.1 |
|
|
Cabinet dimensions (single circuit) |
mm |
420 × 822 × 1420 |
|
|
Internal arc withstand |
kA/s |
20/0.5 |
|
|
Moisture content in dry air |
ppm |
≤ 150 |
|
Conditions of Use
- Ambient temperature: -45℃ to +45℃.
- Humidity: maximum average relative humidity, daily average not exceeding 95%, monthly average not exceeding 90%.
- Altitude: not exceeding 4000m.
- Seismic resistance: intensity VIII.
- Degree of protection: live parts sealed IP67; fuse tube IP67; switchgear enclosure IP3X.
Applications
- Loop distribution and switching stations in urban distribution networks.
- Renewable energy projects (PV, wind, storage).
- Industrial plants, residential communities, airports, railways, tunnels, high-rise buildings.
- Projects restricting SF6 use or sensitive to condensation environments.
FAQ
Q1: What is the insulating medium?
Live parts such as busbars and switches are fully encapsulated in solid insulating materials (epoxy resin, etc.), with no SF6 and no compressed gas.
Q2: What is the difference from SF6 switchgear?
No gas filling is involved, so SF6 emission management and gas refilling are not required; solid insulation is not affected by condensation or humidity, giving better environmental adaptability.
Q3: Is maintenance required?
Routine maintenance is limited under normal operating conditions; no gas pressure monitoring or refilling. Daily checks mainly cover the operating mechanism, temperature rise and insulation appearance.
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