An Ring Main Unit designed, manufactured and fully type-tested according to IEC 62271-200, NG7 is widely used in power distribution systems, such as utilities, industries, buildings and new energy power stations.
An Ring Main Unit designed, manufactured and fully type-tested according to IEC 62271-200, NG7 is widely used in power distribution systems, such as utilities, industries, buildings and new energy power stations.
- SF6 gas-insulated switchgear
- For secondary distribution
- 17.5kV, 630A, 21kA
Customer Benifits:
- Safe & Reliable
- Maintenance free
- Small in size
- Easy to install
- Smart function
Technical Specifications
NG7-12
NG7-17.5
NG7-24
NG7-40.5
NG7-12(Z)
NG7-27,5(Z)
NG7-40.5(Z)
Type of switch
CB, LBS, LBS+Fuse
CB, LBS
CB, LBS, LBS+Fuse
CB, LBS
CB
CB
CB
Rated voltage (kV)
12
17.5
24
40.5
12
1*27.5 / 2*27.5
40.5
Rated current (A)
630
400
630
630 / 1250
1250~3150
1250 - 1P
2500 - 1P or 2P
1250~4000
Rated frequency (Hz)
50
60
50/60
50/60
50
50
50
Withstand voltage (kV)
42/75
38/95
65/125
95/185
42/75
95/200
95/185
Short time current (kA/s)
25/4
21/1
20/4
25~31.5/4
25~40/4
31.5/4
31.5~40/4
Peak withstand current (kA)
63
54.6
52
65~80
63~100
80
80~100
IAC (kA/s)
AFLR 25/1
AFLR 21/1
AFLR 20/1
AFLR 25/1
AFLR 31.5/1
AFLR 31.5/1
AFLR 31.5/1
Rated / Min. gas pressure(MPa, Rel.)
0.04 / 0.02
0.04 / 0.02
0.04 / 0.02
0.04 / 0.02
0.03 / 0
0.03 / 0
0.04 / 0.01
Altitude (m)
≤ 4500
≤ 4500
≤ 4500
≤ 4500
≤ 4500
≤ 4500
≤ 4500
IP degree (Gas tank / Enclosure / Outdoor)
IP67 / IP4X / IP54
IP67 / IP4X / IP54
IP67 / IP4X / IP54
IP67 / IP4X / IP54
IP67 / IP4X
IP67 / IP4X
IP67 / IP4X
Applicable Standards
IEC,IEEE, GB
Applications
Power distribution
Renewable energy
Infrastructure
Data center
Industrial electricity
Customer Value
Safe & Reliable
Comprehensive mechanical interlocking design effectively avoids the adverse impact on the system caused by misoperation.
Maintenance Free
All active and switching parts are fully sealed and insulated, no maintenance cycle needed, saving maintenance time and cost.
Convenient & Flexible
Modular compartment construction enables plugand-play onsite assembly with no gas handling required, speeding up installation and allowing easy future expansion.
Harsh-environment Resistant
Optional Zn-Ni alloy components and premium coating improve salt spray resistance. IP54 enclosure is available for outdoor deployment.
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