HXGT6B-12 Environmentally Friendly Gas-Insulated Metal-Enclosed Ring Main Unit
The HXGT6B-12 ring main unit is the latest high-performance, environmentally friendly 12 kV intelligent switchgear independently developed by Tian’an Electric, featuring a combination of vacuum arc extinction and (environmentally friendly) gas insulation technology.
Category:
Medium-Voltage Switchgear
Keywords:
HXGT6B-12 Environmentally Friendly Gas-Insulated Metal-Enclosed Ring Main Unit
The HXGT6B-12 ring main unit is a high-performance, environmentally friendly 12 kV intelligent switchgear independently developed by Tian’an Electric, featuring a combination of vacuum arc extinction and (environmentally friendly) gas insulation technology.
All high-voltage live components of the product are sealed within a stainless-steel enclosure filled with pure nitrogen or compressed, dried air at a low gauge pressure of 0.02–0.04 MPa (at 20°C) and rated to IP67. An environmentally friendly gas is used to replace the greenhouse-gas SF6, without altering users’ established operating and maintenance practices for gas-insulated ring main units. This solution provides a seamless replacement for both SF6-based and solid-insulated ring main units, delivering a new, green and environmentally friendly product to customers.
1) The circuit breaker cabinet has a rated current of up to 1250 A and a breaking capacity of 31.5 kA, making it capable of replacing certain KYN28A-12 center-mounted switchgear cabinets.
2) Equipped with an observation window for the earthing of the three-position isolating switch;
3) Uses less solid insulating material, resulting in greater environmental benefits;
4) Safe and reliable operation under zero gauge pressure conditions;
5) Two isolation schemes are available for users to choose from: upper isolation and lower isolation; the cable-side earthing switch can be directly closed, complying with the power sector’s “Five Preventive” operating procedures and aligning with users’ operational habits.
6) A self-designed, proven circuit breaker/loaded switch operating mechanism combined with a three-position isolation mechanism is employed, offering excellent versatility and reliability.
|
Serial Number |
Project |
Unit |
Technical Specifications |
|
|
1 |
Rated current |
A |
630 |
1250 |
|
2 |
Rated frequency |
Hertz |
50 |
|
|
3 |
Rated voltage |
kilovolt |
12 |
|
|
4 |
Power-frequency withstand voltage |
kilovolt |
42/48 |
|
|
5 |
Lightning Impulse Voltage |
kilovolt |
75/85 |
|
|
6 |
Rated short-circuit breaking current |
kA |
25 |
31.5 |
|
7 |
Rated short-time withstand current (RMS value)/time |
kA/s |
April 20 |
April 25 |
|
8 |
Arc duration |
s |
0.5 |
|
|
9 |
Inflatable Enclosure Protection Rating |
IP |
67 |
|
|
10 |
Enclosure Protection Rating |
IP |
4X |
|
|
11 |
N2 gas rated pressure (gauge pressure at 20°C) |
megapascal |
0.04 |
|
|
12 |
Minimum operating pressure of N2 gas (gauge pressure at 20°C) |
megapascal |
0.02 |
|
|
13 |
Annual N2 gas leakage rate |
%/year |
≤0.1 |
|
|
14 |
External dimensions |
mm |
400×860×1660 |
|
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Address: No. 816 Jinghua Road, Ningbo National High-tech Zone, Zhejiang Province
Phone: +86-0574-87916011 (International)
E-mail: export@tianandl.com
Phone: +86-0574-87900000 (Domestic)
Email: sales@tianandl.com
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