Page 18 - Contactors_Catalogue

1/16 ABB MOTOR CONTROL AND PROTECTION FOR ROLLING STOCK APPLICATIONS

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Electronic relays and control

Even under the most extreme conditions

Passenger car
Time relays
• The control of air flow as well as the light inside is con-
trolled by time relays. This way, a time interval can trigger
a delayed start and end of the air circulation as well as
turning on or off the lights inside the cabin.
• Inside passenger cabins, different applications like light
and air conditioning are controlled by time relays. The
highly sophisticated CT-S range of time relays from ABB is
ideally suited to fulfill all necessary requirements for rail
construction.

Single-phase monitoring relays
Conductor car • The single-phase current and voltages inside a train need
Insulation monitoring relays to monitored. The wide range of voltage and current moni-
• Insulation faults can occur in every unearthed supply sys- tors of ABB‘s assortment are ideally suited for use inside
tem. The insulation monitoring relays of ABB monitor dif- trains.
ferent AC or DC IT supply systems (single- or three-phase)
for insulation faults.

Time relays
• In case the press switch does not switch off the auxiliary Restaurant car
release pumps of the breaking system a delayed switch Three-phase monitoring relays
off is triggered by the time relays • Every train has applications running which are connected
• While switching between hold-on and start-up coil on the to the 50 Hz three-phase supply system like the air condi-
main switch the pulse can be prolonged by using a time tion and various applications inside the restaurant car. A
relay. three-phase monitoring relay monitors those 50 Hz three-
• The reliable and safe functionality of the compressor is phase supplies.
essential for trains. Using a time relay, the proper working • Coffee machine: monitoring the presence of the supply in
of the compressor can be steered and in case of malfunc- order to protect the coffee machine from damages in case
tion the time relay triggers an alarm signal. of abnormal supply voltage conditions.