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Axle
Counter detects the presence of a train in any specified
track section replacing the existing DC track circuiting
more advantageously for monitoring the complete track
section. The track section can be platform, point zone,
yard and block section. The system is highly reliable,
easy to install and fail safe. Electronic Junction Boxes
at track side generate barrier signal of 5KHz
which are fed to the Rail Mounted TX & RX Coils
at Entry and Exit detection points of section independently.
When each wheel of the train passes over the detection
point, the carrier signal is modulated in the RX Coils.
The modulated signal is sent over a cable to the Axle
Counter. These signals are demodulated and processed
in the evaluator of the Axle Counter to generate "In
Counts" and "Out Counts".
The evaluator compares "In and Out Counts"
and drives two relays called EVR and SUPR,
in case of count equality at supervisory levels becoming
normal respectively.
Axle
Counter
The
track section is shown as "Clear" when
both relays are picked up. Otherwise track section is
shown as "Occupied". The supervisory
relay is driven only when all the functions of supervisory
circuits are working normal for each train movement.
This ensures fail safety.
APPLICATIONS :
- Track
Circuiting for a straight section or point zone.
- Automatic
Signalling.
- Block
Proving using Axle Counters.
- Intermediate
Block Signalling (IBS).
FEATURES
:
- Eliminates
the need for wooden sleepers.
- Monitors
section length upto 15kms.
- Centrally
powered battery of 24V/80AH or 120AH.
- Single
Rail Clamp with fixed stagger between Transducers.
- User
selectible configuration for point zones.
- Simultaneous
In/Out Counts from various detection points.
- Digital
display of IN & OUT Counts for easy readout.
- Opto
- Isolated relay drive for noisy immunity.
- Green/Red
LED indication for track clear/occupied status.
- Special
shielding for operation in 25KV AC traction areas.
- High
Availability (MTBF > 10 6 hours)
- Modular
Design for easy maintenance.
- Reset
facility for maintenance.
| SPECIFICATIONS |
- No. of
Detection Points
- Maximum
Train Speed
- Counting
Capacity
- Transmission
Media
- Max. Line
Attenuation (over cable)
- Signal
Input (5KHz Sinusoidal)
- Relay Drive
Voltage for 1000 ohm Shelf type 4F/4B relay
or QS3 relay
- Power Requirement
Evaluator
Junction Box
Reset Box
- Environmental
Temperature Range
Relative Humidity
- Dimensions
Axle Counter
Junction Box
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2/3/4
200 Kmph
1023
Telecom Cable
20 db
150 mV rms (Min.) to
1500 mV rms (Max.)
>10V
24V (21.6-28.8VDC)
1.0 Amp for 2 detection point
1.5 Amp for 3/4 detection point
200 mA
500 mA (Momentary Only)
0ºC to +60ºC
95% to 98%
Non-condensing
Width Depth Height
570mm * 645mm * 1065mm
207mm * 280mm * 170mm
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