Actel Axle performance
FULL SIZE EXPERIMENT
In a full size experiment the effectivity of Actel Axle has been demonstrated. In a full scale test rig the unoccupied track circuit voltage midway between the transmitter and the receiver is about 7 Vpp. This voltage is reduced to 0.6 V when the track circuit is shorted with the lowest possible impedance. Of course under normal practical conditions the “internal” voltage between the rails can not be measured directly. In a test rig this is possible. Now when the wheel–rail resistance is increased up to two anti-parallel diode-pairs in series with 3.3 Ohm the track circuit fails and the voltage between the rails climbs to 5.7 Vpp. The track relay is energized by this level of voltage. If Actel Axle is switched on the short circuit is nearly ideal and the track circuit returns to normal operation. The voltage is almost zero. In fact the performance is better then the lowest impedance could ever achieve!!!
In a full size experiment the effectivity of Actel Axle has been demonstrated. In a full scale test rig the unoccupied track circuit voltage midway between the transmitter and the receiver is about 7 Vpp. This voltage is reduced to 0.6 V when the track circuit is shorted with the lowest possible impedance. Of course under normal practical conditions the “internal” voltage between the rails can not be measured directly. In a test rig this is possible. Now when the wheel–rail resistance is increased up to two anti-parallel diode-pairs in series with 3.3 Ohm the track circuit fails and the voltage between the rails climbs to 5.7 Vpp. The track relay is energized by this level of voltage. If Actel Axle is switched on the short circuit is nearly ideal and the track circuit returns to normal operation. The voltage is almost zero. In fact the performance is better then the lowest impedance could ever achieve!!!
