07-10-2015, 04:51 AM
(This post was last modified: 07-10-2015, 06:40 AM by PJW.
Edit Reason: remove excess quoted text
)
Hi Peter ,Thank you for all information !!!
Let me tell you in more detail of my problem.1) TCs what you called we named it as TCU Track Coupling Unit.
It consist of a tranformer a resistor and a capacitor which is frequency dependent.
Principle Track Coupling Unit (TCU) TCU is a passive device. It
can be used to terminate the track circuit. It consists of a capacitor, resistor and a transformer in series. It is
basically a band pass filter tuned at a particular frequency.It is a resonant circuit.
The major applications of TCU are as follows:
1. To terminate a track circuit.
2. In the point zone track circuit.
3. In the yards where it is difficult to form the tuned zone.
The advantages of using TCU as compared to ETU are as follows:
1. The main difference between TCU and ETU is that TCU can with stand 400 V DC / 275 V AC r.m.s. as
compared to 160 V DC / 110V AC r.m.s. for the ETU. Hence TCU can be used for Single rail
application.
2. TCU can be kept at a distance of 130 m from the rails. This facilitates the use of TCU in complex yards
where there is space constraint.
3. With TCU it is not necessary to use 35 mm sq. cable for connecting TCU to rail. 2 x 2.5 sq. mm can be
used.
4. Impedance Bonds are not used with TCU but are used with ETU.
3.5.2 Specificat ion
Maximum rail to rail volts : 400 V DC / 275 V AC (RMS)
Unit size
: 140 mm H x 142 mm W x 203 mm L
TCU to Track cable
: 2 x 2.5 mm Sq. Copper cable, 2C-19 x 1.53 sq. mm (35 Sq.mm)
copper cable or 50 Sq. mm equivalent aluminum.
Max. Distance of TCU rail Connection to
block joints.
: 1 meter
Now with the above information I am testing TCU but ideally i have no idea what should be the load,as it is directly connected to Track. Secondly as TCU has single side track its load should be half of TU.
I need more information regarding TCU testing in ideal condition.
Thanks
Hari.
Let me tell you in more detail of my problem.1) TCs what you called we named it as TCU Track Coupling Unit.
It consist of a tranformer a resistor and a capacitor which is frequency dependent.
Principle Track Coupling Unit (TCU) TCU is a passive device. It
can be used to terminate the track circuit. It consists of a capacitor, resistor and a transformer in series. It is
basically a band pass filter tuned at a particular frequency.It is a resonant circuit.
The major applications of TCU are as follows:
1. To terminate a track circuit.
2. In the point zone track circuit.
3. In the yards where it is difficult to form the tuned zone.
The advantages of using TCU as compared to ETU are as follows:
1. The main difference between TCU and ETU is that TCU can with stand 400 V DC / 275 V AC r.m.s. as
compared to 160 V DC / 110V AC r.m.s. for the ETU. Hence TCU can be used for Single rail
application.
2. TCU can be kept at a distance of 130 m from the rails. This facilitates the use of TCU in complex yards
where there is space constraint.
3. With TCU it is not necessary to use 35 mm sq. cable for connecting TCU to rail. 2 x 2.5 sq. mm can be
used.
4. Impedance Bonds are not used with TCU but are used with ETU.
3.5.2 Specificat ion
Maximum rail to rail volts : 400 V DC / 275 V AC (RMS)
Unit size
: 140 mm H x 142 mm W x 203 mm L
TCU to Track cable
: 2 x 2.5 mm Sq. Copper cable, 2C-19 x 1.53 sq. mm (35 Sq.mm)
copper cable or 50 Sq. mm equivalent aluminum.
Max. Distance of TCU rail Connection to
block joints.
: 1 meter
Now with the above information I am testing TCU but ideally i have no idea what should be the load,as it is directly connected to Track. Secondly as TCU has single side track its load should be half of TU.
I need more information regarding TCU testing in ideal condition.
Thanks
Hari.