Zhejiang, China
Business Type:
Business Range:
Electrical & Electronics, Industrial Equipment & Components
Registered Capital:
1.48 Million USD
Plant Area:
3200 square meters
OEM/ODM Availability:
OEM/ODM Service
Sample Available

Ring Main Unit, Air Insulation Ring Main Unit, Un-Panel manufacturer / supplier in China, offering Fix Version 0.4kv Electric Power Distribution Cabinet Low Voltage Switchgear, Sf6 Load Breaker Switch in Ring Main Unit Farady, Sf6 Load Breaker Switch in Ring Main Unit and so on.

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Fix Version 0.4kv Electric Power Distribution Cabinet Low Voltage Switchgear

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $1,000-30,000/ Piece
Port: Ningbo, China
Production Capacity: 50000
Payment Terms: L/C, T/T, D/P
Type: Distribution Metering Box
Structure: Fixed Board
Certification: ISO9001:2000, VDE, CCC
Form: Partly-welded Type
Operation Voltage: High Voltage
Size: 1 Uint

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Basic Info

Model NO.
Application Range
High-rise Buildings
Shell Material
Stainless Steel
Shell Protection Grade
Transport Package
Distribution Metering Box
HS Code

The Unisun enjoy more than 16 year experience manufacture SF6 Ring main Unit in china, we import first APG line from Germany to localized air pressure guage production craft, our APG manufacturing including SF6 switch disconnector, embedded pole and etc epoxy resin insulation parts. iUN-panel units are used for the MV section in MV/LV transformer substations in public distribution systems and MV consumer or distribution substations up to 24 kV.
Fix Version 0.4kv Electric Power Distribution Cabinet Low Voltage Switchgear

The iUN-panel range is made up of modular units containing metal-enclosed SF6 switchgear, using Sulphur hexafluoride (SF6) or vacuum:

  • switch-disconnector;
  • iVD4S vacuum circuit breaker;
  • Vacuum contactor;
  • disconnector.
Unit definitions

Below is the list of iUN-panel range units used in MV/LV transformer substations and industrial distribution substations:
  • IM, IMC, IMB switch;
  • PM fused switch;
  • QM, QMC, QMB fuse-switch combination;
  • CRM contactor and contactor with fuses;
  • DM1-A, DM1-D, DM1-S single-isolationSF6 type circuit breaker;
  • DMV-A, DMV-D, DMV-S single-isolation vacuum type circuit breaker;
  • DM1-W, DM1-Z withdraw able single-isolationSF6 type circuit breaker;
  • DM2 double-isolation SF6 type circuit breaker;
  • CM, CM2 voltage transformers;
  • GBC-A, GBC-B current and/or voltage measurements;
iUN-panel units meet all the following recommendations, standards and specifications:
  • IEC:60694:
  • IEC62271-200
  • IEC60265
  • IEC60420
  • IEC60255
  • IEC62271-100
  • IEC62271-102
iUN-panel units are identified by a code including:
  • an indication of the function, i.e. the electrical diagram code: IM, QM, DM1, CM, DM2, etc.
  • the rated current: 400 - 630 - 1250 A;
  • the rated voltage: 7.2 - 12 - 17.5 - 24 kV;
  • the maximum short-time withstand current values: 12.5 - 16 - 20 - 25 kA.1 s;
  • the color is of RAL 9002 type (frosted satin white).
Example for a unit designated: IM 400 - 24 - 12.5
  • IM indicates an "incoming" or "outgoing" unit;
  • 400 indicates the rated current is 400 A;
  • 24 indicates the rated voltage is 24 kV;
  • 12.5 indicates the short-time withstand current is 12.5 kA.1 s.
The hereunder values are for working temperatures from -5°C up to +40°C and for a setting up at an altitude below 1000 m.
Internal arc withstand:
  • standard:12.5 kA. 0.7 s;
  • enhanced:16 kA. 1 s.
Protection index:
  • units: IP2XC (IP3X consult us);
  • between compartments: IP2x.
Electro-magnetic compatibility:
  • relays: 4 kV withstand capacity, as per recommendation IEC 60801.4;
  • compartments:
  • electrical field:
The cubicles must be stored in a dry area freefrom dust and with limited temperature variations.
  • for stocking: from -40°C to +70°C,
  • for working: from -5°C to +40°C,
  • other temperatures, consult us.
Main characteristics
Rated voltage (kV)17.5
Insulation level 
50 Hz, 1 mnInsulation38
(kV rms)Isolation45
(kV peak)Isolation110
Breaking capacity
Transformer off load (A)16
Cables off load (A)31.5
Short-time withstand current25630 - 1250 A
(kA.1 s)20630 - 1250 A
 16630 - 1250 A
 12.5400 - 630 - 1250 A

The making capacity is equal to 2.5 times the short-time withstand current.
Maximum breaking capacity
Rated voltage (kV)17.5
IM, IMC, IMB, 630 A - 800 A*
NSM-cables, NSM-busbars
CRM with fuses 
SF6 circuit breaker range:
DM1-A, DM1-D, DM1-W, DM1-Z, DM1-S, DM220 kA
Vacuum circuit breaker range:

Fix Version 0.4kv Electric Power Distribution Cabinet Low Voltage Switchgear

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