SINGLE DELIVERY DEVICES
Power supply panels
ShchV-1– a modern input cabinet designated to connect up to three power supply feeders (including from DGA). A built-in consumed power recording node and reliable protection against atmospheric and switching overvoltages, short circuits, pulse overvoltages are implemented in ShchV-1.
ShchOAB-1 – a backup power connection panel designated to control and protect backup power sources, such as an accumulator battery or a diesel-generator.
Signalling transformers and filters
Signalling transformers are designated for power supply of signalling devices.
FR-50 resonant filter is designated to protect track circuit equipment against impact of reverse traction current with frequency 50 Hz on sections with AC electric traction./span>
Power supply sources for rolling stock and signalling
SRPA “Impulse” develops and manufactures power supply sources for any industry branches, including according to customer’s technical requirements. On-board power supply sources and power supply sources of signalling devices are manufactured for railways.
The SPN-33 power supply source is designated for power supply with voltage 24 V of not critical loads on a rolling stock with an on-board network 110 V.
It can be used on the following rolling stock types: 2TE116U, 2TE116UD, 3TE116U, EPL2T, EPL9T, DEL-02, etc.
The BPt-224, BPt-225, BPt-226 power supply sources of critical users are designated for power supply of on-board safety systems, rolling stock control systems with any voltage value of a standard-line on-board network (24/50/75/110).
Output voltage of the sources is galvanically isolated and stabilized, with rated values 26 V, 48 V, and 50 V.
The SPN-42 power supply source is designated to assure power supply of signalling devices with rated DC voltage 15 V and load current 5 А.
Digital equipment for cable network monitorin
The BKTU-1 leak current monitoring unit is designated to increase operating safety and life of electric facilities, sudden outage of which can cause negative consequences and unreasonable material costs. According to the international classification it belongs to RCM-devices (Residual Current Monitor), which detect leak current and warn on this without power-off (as opposed to classic protective cutout devices).
BKTU-1 assures monitoring of up to 12 circuits and has two adjustable thresholds of leak current monitoring. When achieving the first threshold, it doesn’t stop operation, but generates a warning, allowing personnel to end a technological process correctly.
BKTU-1 is connected with the BKSI-2 insulation resistance monitoring unit via two-wired bidirectional RS-485 interface, which assures the possibility to transmit diagnostic information on monitored circuits.
Insulation resistance monitoring units
Use of insulation monitoring devices is regulated with Electrical Installation Regulations (PUE).
The BKSI-2, BKSI-3 insulation resistance monitoring units are designated for automatic monitoring and online indication of electric insulation resistance in AC and DC electric networks with leak capacities of a measured circuit:
They have two adjustable resistance thresholds. As a control point for each threshold is achieved, independent discrete signals of “dry” contact type are generated, the signals are accompanied with a light signal. BKSI-2 has output to an RS-485 interface.
Normalizers of analog signals
The normalizers of analog signals are devices to convert voltage signals into a proportional normalized current signal (4-20 mА).
Microprocessor converters for phase-sensitive track circuits
The PCht-2 and PCht-3 frequency converters are designated to power track circuits with phase-sensitive receivers with current 25 Hz. PCht-2 is designated to power circuits 110 (115) V, PCht-3 – to power circuits 220 (230) V. The converters have been developed to replace obsolete PCh-50/25 ferroresonant converters.
Based on these converters a modern panel of converters is composed (a functional analog of PP25.1) exceeding analogs by several main characteristics: