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The WITT TVM system monitors the traction voltage in both directions of travel using a single, factory-preconfigured unit – ideal for installation in underground railway tunnels. Up to two TVM components – analogue voltage monitors or voltage signalling relays – are housed in a highly compact V2A stainless steel enclosure, which can withstand even severe external impacts such as rockfall or vandalism. Highly insulating separation zones within the enclosure prevent voltage cross-contamination between the different voltage ranges, as well as between the operating and signalling voltages. The system is supplied ready for operation and fully configured – there is no need for on-site commissioning or parameterisation.
The WITT TVM system monitors the traction voltage in both directions of travel using a single, factory-preconfigured unit – ideal for installation in underground railway tunnels. Up to two TVM components – analogue voltage monitors or voltage signalling relays – are housed in a highly compact V2A stainless steel enclosure, which can withstand even severe external impacts such as rockfall or vandalism. Highly insulating separation zones within the enclosure prevent voltage cross-contamination between the different voltage ranges, as well as between the operating and signalling voltages. The system is supplied ready for operation and fully configured – there is no need for on-site commissioning or parameterisation.
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Measures DC voltages and AC components
Voltage withstand rating up to 6,000 V DC
Measures DC voltages and AC components
Voltage withstand rating up to 6,000 V DC
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Monitoring relay. Using robust analogue and digital measurement technology, the DC voltage is measured, analysed, signalled and transmitted to a data collector.
Monitoring relay. Using robust analogue and digital measurement technology, the DC voltage is measured, analysed, signalled and transmitted to a data collector.
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monitors direct current – contact line voltages up to 750 VDC – fixed threshold values – no auxiliary voltage
monitors direct current – contact line voltages up to 750 VDC – fixed threshold values – no auxiliary voltage
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The WITT-TVM traction voltage relay provides analogue monitoring of the traction voltage in traction power supply systems up to 1,500 V DC and reliably indicates whether a system is de-energised before parts are connected or work is carried out in live areas – for example, during maintenance work or in an emergency. It operates without an external auxiliary voltage, drawing its power from the measured voltage itself, and is supplied with up to eleven threshold parameters configured to the customer’s specifications at the factory – this is not a standard off-the-shelf product. Two separate, potential-free changeover contacts indicate when the voltage is above or below the set threshold separately; the compact DIN rail housing (IP20) can be integrated into any control cabinet.
The WITT-TVM traction voltage relay provides analogue monitoring of the traction voltage in traction power supply systems up to 1,500 V DC and reliably indicates whether a system is de-energised before parts are connected or work is carried out in live areas – for example, during maintenance work or in an emergency. It operates without an external auxiliary voltage, drawing its power from the measured voltage itself, and is supplied with up to eleven threshold parameters configured to the customer’s specifications at the factory – this is not a standard off-the-shelf product. Two separate, potential-free changeover contacts indicate when the voltage is above or below the set threshold separately; the compact DIN rail housing (IP20) can be integrated into any control cabinet.
