VAM 1T, VAM 3TD, VAM 3ED Medium voltage arc eliminator units

The conventional arc flash protection system gives a trip command to the circuit breaker to disconnect the fault. The arc flash burning time is as long as the operation time is for the arc flash protection system (7ms) and circuit breaker (40 ... 70 ms). The total fault disconnection time is depending very much on the operation of the circuit breaker.

The fault distinguishing can be done faster when using arc eliminator units together with the VAMP 221 arc flash protection system. The arc eliminator unit type VAM 3ED controlled by the arc flash protection system type VAMP 221 can further degrease the burning time of the fault by earthing every phase to the ground within five milliseconds. After triggering the arc eliminator the fault is converted to metal-galvanic thus reducing the pressure impact to minimum.
The VAM 1T interface unit is connected to the VAMP 221 arc flash protection system via modular cables. The trip command and supervision communication is done optically between VAM 1T and the VAM 3TD triggering unit which is the energy storage for the VAM 3ED eliminator unit.

 

VAM 1T control I/O unit

  • interface between VAMP 221 system and VAM 3TD trigger unit
  • supervised trip and communication fiber connection to VAM 3TD
  • one trip and two alarm contacts
  • full self-supervision
 

 

VAM 3TD Trigger unit

  • energy stored in a capacitor bank
  • triggers VAM 3ED eliminator unit
  • controlled by VAM 1T
  • full self-supervision

VAM 3ED Arc eliminator unit

  • Thomson coil based shorting device
  • 5 ms arc fl ash elimination time 
  • re-useable
  • full self-supervision

 
Document Ext. Language Version Update
User manual PDF English 002 06/09
Product brochure PDF English 001 09/09