Product information
The Magnetic Receiver WP2 K11 manufactured by Integra can be replaced with
a fully compatible redesign.
The Magnetic Receiver (MR) is used for the automated
switching of the voltage level in potentially cross-border
rail traffic. The switching is triggered by a direct signal
provided by the train’s internal energy storage and trans-
mitted via the MR to the subsequent switching logic.
Functions:
A permanent magnet positioned in the track bed, whose
magnetic field activates bistable special relays in the MR
when passed over, triggers the voltage changeover. After
detection of the magnetic switching signal by the MR, the
relay coils are energized by a voltage pulse and the
switching mechanism is reset to its initial position.
The bistable circuit ensures that even slowly responding
systems can detect this process. The MR is equipped with
two bistable special relays. These are arranged together
with special ferrite cores, which orient the magnetic field in such a way that the
N–S polarity of the magnets in the track bed can reliably influence the switching
function. Each of these relays has one connection contact on the outside of the
housing. The south pole of the permanent magnet is detected via contact 7,
while the north pole is detected via contact 1.
The internal electronics are fully encapsulated in a certified potting compound
in accordance with UL94-V0, thus completely protected from weather and
harsh operating conditions.
The housing is also made of a plastic material compliant with UL94-V0.
Certificates are available on request.
The magnet installed in the track bed provides a magnetic field of 8.5 gauss.
The nominal distance between the MR and the magnet required to trigger the
switching function is 19.5 cm. The magnetic field strength decreases inversely
proportional to the third power of the distance. Therefore, a field strength of
approximately 14 gauss at the MR must still reliably trigger switching when the
MR moves across the field at a speed of 125 mph (56 m/s).
The Magnetic Receiver is designed for a nominal supply voltage of 72 V be-
tween contacts 6–4, 7–4, and 1–4. The receiver operates as a detector with
external series resistors within an overall circuit. Proper operation is ensured
within a voltage range of 48 V to 105 V and within a temperature range
of –40°C to +80°C. The switching contacts are made of gold-plated cobalt and
are rated for a switching current of 1 A.
A 10 Ω (1 W) resistor is connected in series with the contacts.
Available upon request:
Types WP2 K12;-K13;-K14;-K15;-K16;-K17;-K18, and WP2 K19.