Air Ring Main Unit (ARMU)

ARMUOur Air Ring Main Unit for secondary distribution is a factory-built, metal-encapsulated switchgear; suitable for either indoor or outdoor installation.

They integrate from 1 to 4 load-break switches for cables or transformer, an earth-fault indicator and an arc-extinguishing device.

The ARMU also has the option for installing Metering devices.



Product Highlights

Main Features:

-  High operating reliability.
-  Simple maintenance & inspection.
-  No isolating partitions.
-  High dynamic & thermal strength.
-  Tested by international laboratories
-  Encapsulated extinguishing device.
-  Current interruption without visisble arc.
-  High number of operation, simple mechanism.
-  Easy cable connection.
-  Possible to be connected with any SCADA system.


Design Standards:

The Air Ring Main Units are designed, manufactured and tested according to the following IEC & VDE standards

-   IEC publication 60271-200.
-   IEC publication 60694
-   IEC publication 60271-102
-   IEC publication 420
-   IEC publication 265  
-   IEC publication 129
-   DIN VDE 0670    



The Air Ring Main Unit is suitable for use in:
-   Transmission & Distribution
-   Buildings
-   Industry
-   Infrastructure