What this braking unit does
The VW3A7203 is a network braking unit rated for 22 kW peak braking power at 400 V supply, with a permanent braking power of 11 kW. It dissipates regenerated energy from the DC bus of a variable speed drive during deceleration, preventing overvoltage trips. The unit provides overload protection up to 1.2 times the maximum current, and the associated fuse rating is 50 A at 690 V.
Physical fit and environment
Dimensions are 580 mm high, 270 mm wide, and 295 mm deep — a substantial enclosure that typically mounts near the drive in a cabinet. IP20 protection means it is not sealed against moisture; install it inside a clean, dry panel. Operating altitude is 1000 to 4000 m with a 5 % current derating per 1000 m above sea level. Storage temperature range is -25 to 55 °C.
Lifecycle status and sourcing
This unit is classified as obsolete by Schneider Electric.