~Medium Voltage Distribution

~Description
The Rollarc three-pole indoor contactor uses sulphur hexafluoride (SF6) gas for
insulation and circuit-breaking.
Circuit-breaking is based on the rotating arc principle. The basic version is made up
of three pole units installed in the same insulating enclosure. The part of the
enclosure containing the active parts of the poles is filled with SF6 gas at a gauge
pressure of 2.5 bars.
There are two types of Rollarc contactors:
b the R400 with magnetic holding,
b the R400D with mechanical latching.
Main advantages
b a modern and tested circuit-breaking technique featuring SF6 safety,
b no maintenance for active parts,
b high mechanical and electrical endurance,
b low switching surges without additional devices (surge arrester),
b insensitivity to the environment,
b gas pressure may be continuously monitored.
Field of application
Protection and control of:
b MV motors,
b capacitor banks and power transformers.
Utilisation range
Standards
Rollarc complies with the following standards and specifications:
IEC publication 60470
IEC 62271-105
Installation references
SOLMER, MICHELIN, SHELL, ESSO, CFR, PECHINEY,
NAPHTACHIMIE, USINOR, SACILOR, SOLLAC.
NUCLEAR AND CONVENTIONAL THERMAL POWER STATIONS.
MINES DE SAAR (GERMANY).
NOKIA (FINLAND) KAFAK (SWEDEN).