Gold Member Since 2017
Audited Supplier
Wenzhou Unisun Electric Co., Ltd.

Ring Main Unit, Air Insulation Ring Main Unit, Un-Panel manufacturer / supplier in China, offering Iun-Panel Air Insulation Ring Main Unit, 15kv 20kv Potential Voltage Transformer, 11kv Voltage Transformer and so on.

(/ )

Supplier Homepage Product Ring Main Unit Iun-Panel Air Insulation Ring Main Unit

Iun-Panel Air Insulation Ring Main Unit

FOB Price: US $5,000 / Set
Min. Order: 1 Set
Min. Order FOB Price
1 Set US $5,000/ Set
Get Latest Price
Port: Ningbo, China
Production Capacity: 100000
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

Request a custom order and have something just for you!

Send Customized Request
Basic Info
  • Model NO.: iUN-panel
  • Structure: Protection
  • Form: All- packaged Type
  • Size: 3 Uint
  • Shell Material: Stainless Steel
  • Brand: Unisun
  • Origin: China
  • Type: Indoor, Sf6
  • Certification: ISO9001:2000
  • Operation Voltage: High Voltage
  • Application Range: Power Plants
  • Shell Protection Grade: IP56
  • Trademark: Unisun
Product Description

iUN-panel Air Insulation Ring Main Unit

Medium Voltage Switchgear

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. UN-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.

Iun-Panel Air Insulation Ring Main Unit


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

  • switch-disconnector;
  • VD4S vaccum circuit breaker;
  • Vacuum contactor;
  • disconnerctor.


Unit definitions

Below is the list of UN-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-isolationvacuum type circuit breaker;
  • DM1-W, DM1-Z withdrawable single-isolationSF6 type circuit breaker;
  • DM2 double-isolation SF6 type circuit breaker;
  • CM, CM2 voltage transformers;
  • GBC-A, GBC-B current and/or voltagemeasurements;



UN-panel units meet all the following recommendations, standards and specifications:

  • IEC:60694:
  • IEC62271-200
  • IEC60265
  • IEC60420
  • IEC60255
  • IEC62271-100
  • IEC62271-102


Main characteristics

Rated voltage (kV)7.21217.524
Insulation level    
50 Hz, 1 mnInsulation20283850
(kV rms)Isolation23324560
(kV peak)Isolation7085110145
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.
* 60 kV peak for the CRM unit.


Maximum breaking capacity

Rated voltage (kV)7.21217.524
IM, IMC, IMB,630 A - 800 A*
NSM-cables, NSM-busbars
PM, QM, QMC, QMB25 kA 20 kA 
CRM10 kA8 kA  
CRM with fuses25 kA   
SF6 circuit breaker range:
DM1-A, DM1-D, DM1-W, DM1-Z, DM1-S, DM225 kA20 kA
Vacuum circuit breaker range:
DMV-A, DMV-D, DMV-S25 kA20 kA

* in 800 A consult us.

Send your message to this supplier
Mr. Rory
To: Mr. Rory

Enter between 20 to 4,000 characters.

This is not what you are looking for? Post a Sourcing Request Now