WITT Solutions GmbH
SMARTE Messtechnik für Gleichstrom – Spannung – Kabel – Isolation
The TVM monitors the driving voltage of DC railways using robust analog measurement technology.
The TVM traction drive voltage monitoring is usually used as a voltage monitor for catenary voltage in DC traction systems. This is necessary, for example, when measurements have to be carried out before connecting the different parts of the S-Bahn or U-Bahn.
An electrical connection of the sections may only be made if all voltage values are within a certain window.
In addition, the TVM can indicate high voltages in safety areas, e.g. at the conductor rail of a subway.
The TVM is a voltage monitor based on analog technology and therefore suitable for highest security requirements. With its specific signal filter, the device ensures that even the impulsive driving voltage of a direct current railway is evaluated correctly.
As soon as the predefined voltage values are reached, the measuring unit begins its activity and shows when threshold values are exceeded or fallen below with ppotential-free changeover switches. It needs no auxiliary voltage as it is directly connected to the catenary or theie supply units.
|
A VDC |
Rating VDC min. |
Rating VDC to |
switching delay |
Pulse break |
|---|---|---|---|---|
|
10 |
110 |
600 |
max 5sek |
about 3 seconds |
|
80 |
400 |
800 |
Max 5sek |
ca.3sek |
Explanation of the table:
VDC: From This voltage allows the system to perform a correct measurement
Rating: Rating areas
Switching delay: Duration in ms of the pending signal BEFORE a message is generated
Pulse pause: Time in ms until the next signal display
|
Supply voltage |
from catenary |
|
Power consumption |
switched: 1000V max. 7mA |
|
humidity |
0 up to 100%, non-condensing |
|
Outside temperature range |
-20 up to 50 °C |
|
Housing |
Protection class IP 20 |
|
Housing for 35mm DIN rail |
|
|
Dimensions in mm: |
|
|
Mains connection and inputs and outputs: |
– screw terminals, |
|
weight |
No entry |
The typical applications are driving voltages with the following rated voltage:
|
Nennspannung (Fahrspannung) VDC |
300 |
750 |
750 |
|
Tension resistance (U max) to |
750 |
1000 |
1200 |
|
Entry Resistance |
& gt; 100 kOhm |
& gt; 100 kOhm |
& gt; 100 kOhm |
Response time: DC ca. 20 ms; AC ca. 500 ms
Repetition accuracy: ≤ 0.2% of the final value
Number of measuring channels: 1
|
Anzahl |
2 |
|
Technology |
Relay with 2 separate Wechsler (NC / NO) |
|
Switching voltage |
max. 250 V |
|
Schaltstrom |
max. 8 A |
|
Switching |
max. 2000 WAC / 60 W |
|
Tension Coil – Contact |
max. 5000 VAC |
|
Switch games at Imax |
& gt; 1,000,000 |
Possible variants in dependence on the scope of function resp. Options
|
LED1 |
grün |
ON / OFF |
Sound On / OFF |
No extensions possible.
You might find the extensions you need in the digital version of this product: WB- TVM.
The following items are included in the scope of delivery:
Datenblätter
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Datasheet
Currently no documents available
Fiches techniques
Aucun document disponible pour le moment
The device is completely analogue and therefore no digital values are available.
monitors direct current – contact line voltages up to 750 VDC – fixed threshold values – no auxiliary voltage
Read more
Using robust analog and digital measurement technology, the driving voltages of DC railways are measured and directly evaluated.
monitors direct current – contact line voltages up to 750 VDC – fixed threshold values – no auxiliary voltage
Read more
