ELX24 series Eco-friendly Gas Insulated Ring Main Unit
- Description
- Specification
- Features
- Size
- Catalogue
ELX24 series eco-friendly gas insulated ring main unit is characterized by reasonable design, reliable power supply, compact structure, easy for installation, flexible operation, small size and cost-effectiveness. It is applied in the distribution system of three-phase AC 50Hz, rated voltage 12kV, especially in power system of small secondary power distribution station, switching station, industrial and mining enterprises, urban residential area, airport, railway, tunnel, high-rise building, etc. to receive and distribute energy.
Standards
IEC 62271-102:2001
IEC 62271-102A1:2011
IEC 60265-1:1998
IEC 62271-100:2008
IEC 62271-200:2003
IEC 60529:2001
IEC 62271-1:2007
IEC 60060-1:2010
IEC 60694-2002Main technical data of RMU
|
No |
Description |
Unit |
Parameter |
|
|
1 |
Rated voltage |
kV |
12 |
|
|
2 |
Power frequency withstand voltage |
Phase to phase/earth |
kV |
42 |
|
Across the isolating distance |
kV |
48 |
||
|
3 |
Lightning impulse withstand voltage |
Phase to phase/earth |
kV |
75 |
|
Across the isolating distance |
kV |
85 |
||
|
4 |
Rated frequency |
Hz |
50 |
|
|
5 |
Rated current |
A |
630 |
|
|
6 |
Rated short circuit breaking current |
kA |
20 |
|
|
7 |
Rated short time withstand current |
kA/s |
20/4 |
|
|
8 |
Rated peak withstand current |
kA |
50 |
|
|
9 |
Rated short circuit making current (peak) |
kA |
50 |
|
|
10 |
Resistance of main circuit |
μΩ |
≤140 |
|
|
11 |
Rated operating sequence |
|
O-0.3s-CO-180s-CO |
|
|
12 |
Mechanical endurance |
VCB & LBS |
Ops. |
10000 |
|
ES with disconnector |
3000 |
|||
|
13 |
Electrical endurance |
VCB breaking capacity |
Ops. |
30 |
|
LBS making capacity |
100 |
|||
|
ES making |
2 |
|||
|
14 |
Control voltage of auxiliary circuit |
|
24, 48, 110, 220DC |
|
|
110,220AC |
||||
|
15 |
IAC duration |
s |
≥0.5 |
|
|
16 |
Rated gas pressure (AP) |
MPa |
0.12 |
|
|
17 |
Annual gas leakage rate |
|
≤0.02% |
|
|
18 |
Protection degree |
IP4X |
||
Technical data of VCB unit
|
No. |
Description |
Unit |
Parameter |
|
|
1 |
Rated voltage |
kV |
12 |
|
|
2 |
Rated current |
A |
630 |
|
|
3 |
Rated frequency |
Hz |
50 |
|
|
4 |
Rated insulation level |
Rated power frequency withstand voltage(Phase to phase/earth, across the isolating distance), 1min |
kV |
42/48 |
|
Rated lightning impulse withstand voltage (phase to phase/earth, across the isolating distance) |
kV |
75/85 |
||
|
5 |
Rated short time withstand current |
kA |
20 |
|
|
6 |
Rated short circuit duration |
s
|
4 |
|
|
7 |
Rated peak withstand current |
kA |
50 |
|
|
8 |
Rated short circuit making current |
kA |
50 |
|
|
9 |
Rated short circuit breaking current |
kA |
20 |
|
|
10 |
Rated operating sequence |
O-0.3s-CO-180s-CO |
||
|
11 |
Mechanical endurance |
Ops. |
10000 |
|
Technical data of LBS unit
|
No. |
Description |
Unit |
Parameter |
|
|
1 |
Rated voltage |
kV |
12 |
|
|
2 |
Rated current |
A |
630 |
|
|
3 |
Rate frequency |
Hz |
50 |
|
|
4 |
Rated insulation level |
Rated power frequency withstand voltage (phase to phase/earth, across the isolating distance), 1min |
kV |
42/48 |
|
Rated lightning impulse withstand voltage (phase to phase/earth) |
kV |
75/85 |
||
|
5 |
Rated short time withstand current |
kA |
20 |
|
|
6 |
Rated short circuit duration |
s |
4 |
|
|
7 |
Rate peak withstand current |
kA |
50 |
|
|
8 |
Rated short circuit making current |
kA |
50 |
|
|
9 |
Rated short circuit breaking current |
kA |
20 |
|
|
10 |
Rated operating sequence |
O-15s-CO |
||
|
11 |
Mechanical endurance |
Ops. |
10000 |
|
- ELX24 is eco-friendly gas insulated, environmental friendly, pollution-free, compact design, its outline dimensions similar to SF6 RMU.
- The RMU structure is classic design, comprising of instrument compartment, gas tank compartment, cable compartment and mechanism compartment. A pressure relief passage is arranged in cable compartment and gas tank compartment, to safeguard the equipment and personnel in case of internal arc fault. Mechanical interlocks are arranged between load break switch, circuit breaker, 3-position disconnector and cable compartment, with “five-proof” functions of switchgear.
- The vacuum interrupters used in ELX24 RMU adopt CuCr contact material, of small electrical wear rate, long life span, high and stable insulating strength, rapid arcing recovery, high breaking capacity. The vacuum interrupters are embedded by APG process, to meet requirements for reliable performance and miniature design.
- The disconnector of RMU is double blade design, so it has 2 isolating clearances, which has high breaking capacity than single isolating clearance, also solves the insulating saturation of arcing, thus to increase the reliability of equipment, to have better electrical performance and life span.
- The ELX24 is modular design, the functional units are free to be combined and integrated.
