12kV 24kV 36kV Pure air/Nitrogen Insulated Ring Main Unit(RMU) Ensuring Stable Power
Key attributes
| Brand | ROCKWILL |
| Model NO. | 12kV 24kV 36kV Maintenance-Free Pure air/Nitrogen Insulated Ring Main Unit(RMU) |
| Rated voltage | 36kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| Series | REC |
Product descriptions from the supplier
Description：
ROCKWILL® attaches great importance to product quality and manufacturing technology, and treats every step of product production with precision and meticulousness. Only insulation gas is used to comprehensively compare heating dry air, nitrogen, carbon dioxide, and pure air. Pure air synthesized with extremely low moisture content and high purity is selected as the preferred insulation gas to replace SF6. The core switch unit of the product adopts a brand new vacuum arc extinguishing chamber soft package casting process, combined with a carefully designed rotating three-position switch, with a simple and compact overall structure; The fully sealed gas box replaces SF6 with pure air, with a highly advantageous electric field distribution design, and the partial discharge of the entire cabinet is below 5pC; The salt spray resistance test of the operating mechanism of the zinc inlay alloy surface treatment process has exceeded 168 hours, and the longest service life can reach 30000 times.
Feature：
Pure air/Nitrogen insulated ring main unit
Environmentally friendly gas
Zero carbon emissions, zero waste
Intensive and meticulous producing, Seeking finer quality
Comply with IEC/ANSI standards
Provided customized manufacture
Whole solutions for design, assembly, test...
Accountable solution for safety and reliability
Wide range offering, easy business and convenient installation
Main technical parameters (three phase)：
12kV
N |
Item |
Unit |
Data |
1 |
Rated maximum voltage |
kV |
12 |
2 |
Rated maximum current |
A |
630/1250 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
Method of Arc Suppressing |
Vacuum |
|
5 |
Method of Insulation |
Pure air/Nitrogen |
|
6 |
Rated short circuit breaking current |
kA |
20/25 |
7 |
Rated peak value withstand current |
kA |
50/63 |
8 |
Rated 1min power frequency withstand voltage |
kV |
42 |
9 |
Rated lightning impulse voltage |
kV |
75 |
10 |
Operation sequence |
/ |
C-0.3-CO-180-CO |
12 |
Resistance loop |
μΩ |
≤140 |
13 |
Rated gas pressure (20℃ gauge) |
Mpa |
0.02 |
14 |
Minimum operating gas pressure |
Mpa |
0 |
15 |
Mechanical life - Circuit breaker |
N |
10000 |
Mechanical life - Load break switch |
N |
3000/6000 |
|
Mechanical life - Disconnector |
N |
3000/6000 |
|
Mechanical life - Earthing switch |
N |
3000/6000 |
|
16 |
Protection grade - Gas tank |
IP67 |
|
Protection grade - Shell |
IP4X |
||
17 |
Rated annual air leakage rate |
% |
0.01 |
24kV
N |
Item |
Unit |
Data |
1 |
Rated maximum voltage |
kV |
24 |
2 |
Rated maximum current |
A |
630/1250 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
Method of Arc Suppressing |
Vacuum |
|
5 |
Method of Insulation |
Pure air/Nitrogen |
|
6 |
Rated short circuit breaking current |
kA |
20/25 |
7 |
Rated peak value withstand current |
kA |
50/63 |
8 |
Rated 1min power frequency withstand voltage |
kV |
42 |
9 |
Rated lightning impulse voltage |
kV |
75 |
10 |
Operation sequence |
/ |
C-0.3-CO-180-CO |
12 |
Resistance loop |
μΩ |
≤140 |
13 |
Rated gas pressure (20℃ gauge) |
Mpa |
0.02 |
14 |
Minimum operating gas pressure |
Mpa |
0 |
15 |
Mechanical life - Circuit breaker |
N |
10000 |
Mechanical life - Load break switch |
N |
3000/6000 |
|
Mechanical life - Disconnector |
N |
3000/6000 |
|
Mechanical life - Earthing switch |
N |
3000/6000 |
|
16 |
Protection grade - Gas tank |
IP67 |
|
Protection grade - Shell |
IP4X |
||
17 |
Rated annual air leakage rate |
% |
0.01 |
36kV
N |
Item |
Unit |
Data |
1 |
Rated maximum voltage |
kV |
36 |
2 |
Rated maximum current |
A |
630/1250 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
Method of Arc Suppressing |
Vacuum |
|
5 |
Method of Insulation |
Pure air/Nitrogen |
|
6 |
Rated short circuit breaking current |
kA |
20/25 |
7 |
Rated peak value withstand current |
kA |
50/63 |
8 |
Rated 1min power frequency withstand voltage |
kV |
42 |
9 |
Rated lightning impulse voltage |
kV |
75 |
10 |
Operation sequence |
/ |
C-0.3-CO-180-CO |
12 |
Resistance loop |
μΩ |
≤140 |
13 |
Rated gas pressure (20℃ gauge) |
Mpa |
0.02 |
14 |
Minimum operating gas pressure |
Mpa |
0 |
15 |
Mechanical life - Circuit breaker |
N |
10000 |
Mechanical life - Load break switch |
N |
3000/6000 |
|
Mechanical life - Disconnector |
N |
3000/6000 |
|
Mechanical life - Earthing switch |
N |
3000/6000 |
|
16 |
Protection grade - Gas tank |
IP67 |
|
Protection grade - Shell |
IP4X |
||
17 |
Rated annual air leakage rate |
% |
0.01 |
Compact type pure air/nitrogen insulated ring main unit
Type |
Top extension of single panel |
Side extension of single panel |
Single panel size of compact module |
Circuit Breaker Panel |
390*850*1950 |
390*850*1950 |
390*850*1950 |
Load Break Switch Panel |
390*850*1950 |
390*850*1950 |
390*850*1950 |
PT Panel (with 3phase, 5 columns) |
600*850*1950 |
600*850*1950 |
600*850*1950 |
PT Panel (single phase) |
420*850*1950 |
420*850*2000 |
420*850*1600 |
Bus Riser |
375*850*1950 |
375*850*2000 |
375*850*1600 |
Metering panel |
750*850*1950 |
750*850*2000 |
750*850*1600 |
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