Air break
switch for railways

RABS series of air break switches were especially developed for railway, light rail and tram applications. The models range for railways includes 1 pole, 1+1 pole and 2 poles versions for DC 750 – 3500 V, 16.7 and 50 Hz in a range from 15 to 25 kV. The tram DC version is made with 1 pole. The mechanical parts are made of the highest-grade stainless steel, qualified hot dip galvanizing and nickel-plated high-grade copper to prevent from corrosion. Together with our existing motor operators it provides a complete solution for automation and remote control of the railway and tram electrical networks.

Hughes Power System air break switch for railways
  • High quality mechanical parts
  • Low life cycle cost
  • High level of insulation
  • Innovative design
  • Silicone insulators
  • Easy to remote control


RABS1S-15 and RABS1S-25
Measure 15 kV 25 kV
Nominal voltage Un 15 kV 25 kV
Rated current In 1600 A 1600 A
Rated insulation level UNm 17.5 kV 27.5 kV
Rated impulse voltage UNi 170 kV 250 kV
Short-duration power-frequency test level Ua 80 kV 95 kV
Rated frequency (A.C.) fr 16.7 Hz 50 Hz
Rated transformer breaking current I3 9 A 9 A
Rated cable-charging breaking current I4a 6 A 6 A
Rated short-time withstand current Ik 32 kA 32 kA
Rated duration of short-circuit current tk 1 s 1 s
Rated peak withstand current Ip 93 kA 93 kA
Rated short-circuit making current Ima 16 kA 16 kA
Creepage distance approx. S 765 1100
Opening distance L 310 480
Insulator type   silicone silicone
Weight kg    
Endurance class   2 2
Over voltage class   OV4 Ov4
Test:DIN EN 50152-2:2012, 50124-1: 2017

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