Ring Main Unit

The latest highlight in the product range of NATUS!

NATUS benefits

  • Own development and production
  • Compact dimensions
  • Type- and arc-tested to IEC
  • 12 kV / 630 A / 25 kA;1s
  • Circuit breakers in withdrawable unit technology
  • Single absorber
  • Integrated cable testing system
  • Cable connection possible via device connection insulators
  • Base frame optional
  • Base for cable connection 400 mm height

Design features and classification under standard IEC 62271-200

Busbar system  Single
Operational availability category LSC 1
Internal arc resistance classification IAC AFLR

Switchgear-system

12 kV

 

Rated Values

max.

 

Rated voltage

12

kV

Rated power-frequency withstand voltage

28 kV / 1 min

 

Rated lightning impulse withstand voltage

60

kV

Rated short-time withstand current

25 kA / 1 s

 

Rated impulse current

63

kA

Rated short circuit period

630

A

Protection class

IP 3X

 

Internal arc resistance classification

AFLR 25 kA / 1 s