WSP panel..wiring diagram of K05 relay,power supply in Wheel slide protection device, fault codes..

During the course of brake application, there are possibilities
of skidding/sliding/locking of individual axle. In these cases
adhesion between the rails & wheels plays vital roll. Above
situations are likely to cause damage to wheel sets with
increased braking distance. The main purpose of using the
WSPs is to utilize the available adhesion. The WSPs provided
in the system avoids wheel sliding, also cuts the maintenance
cost. Speed sensors, the part of the system detect the speed of
the wheel & sends signal to the processor unit.
The processor unit evaluates the received signal from speed
sensor of the vehicle & generates signals enabling the dump
valve/antiskid valves to control the brake cylinder pressure in
case of any locking/skidding. The control on the brake cylinder
pressure is instantaneous to the wheel to rail adhesion, keeping
the wheels within their optimum range of skidding.
The WSP has some of the major parts.
1. Speed Sensor.
2. Phonic wheel.
3. Microprocessor.
4. Dump valves.
5. Pressure switch.

Microprocessor:
Microprocessor is the heart of the WSP system. This gathers
the signals from phonic wheel & speed sensors, evaluates the
vehicle speed. Moreover, during brake application, it monitors
& bridges the sharp drop of speed of a particular axle/wheel,
enabling the dump valve to control/adjust the brake cylinder
pressure.