ADVANCED RAIL CONTROLS PRIVATE LIMITED

Sahakar Nagar, Bangalore, Karnataka

Rotational Speed Sensor for Traction Motors of 6000 HP Three Phase Drive Locomotives of Indian Railways was developed and supplied as a replacement to the existing passive Wiegand Type Sensor, which continues to have reliability problems. This is an active sensor with strong pulses having two output channels each with direction encoded signal making it 100% compatible to the Wiegand fed locomotive Electronics needing no modifications while retrofitting. The mechanical size and interface is identical to the existing Wiegand sensor and is powered directly by locomotive battery at 110V DC and can handle a variation of 77V to 138V. The sensor complies with IEC-60571 and IEC-61373 test standards.

The Pressure sensor is made of piezo-resistive pressure sensor packaged in surface mount configuration and attached to a ceramic substrate, capable of an operating temperature(fluid temperature) of -40C to +125C. The sensing element associated with the amplifier and current converter, housed in a printed circuit board, will be embedded in a stainless steel housing. Packaged pressure sensor will work as a two wire sensor providing 4-20mA output corresponding to 0-4 bar pressure.

The differential amplifier will be housed in an aluminium enclosure. The differential amplifier has two input channels and each of these input channel can accept a 4-20mA signal coming from the pressure sensor. The output of the amplifier is the difference of the two input pressures(differential) and is provided as 4-20mA signal. Both input and output signals are connected to the amplifier through 5 pin circular connectors of type KPSE06E14-5S and corresponding mating receptacle in the amplifier housing.