DC-DC Converters with 3000VAC Reinforced Insulation for Railway Applications
Railway electrification systems rely on a steady DC supply to both power their DC motors and the control/energy circuits. These DC-traction systems are more energy efficient than their coal, gas, or diesel-based counterparts while also reducing CO2 emissions. DC-to-DC converters play a crucial role in improving the energy efficiency and power quality of electrified railways. Electronic components used in these applications will be subjected to extremes in temperature, humidity, vibration, and mechanical shock. As such, they require a high degree of electrical and structural integrity to be able to withstand these conditions and reliably operate. Using DC-DC Converters for Railway Applications Regenerative braking relies on the use of a large bidirectional DC-to-DC converter to send power back to the battery bank or energy storage system (ESS) from the DC feeder line. Smaller DC conversion is necessary in modern railways to distribute a continuous supply of power to all electronic devices and subsystems within the coach. These auxiliary systems include higher voltage critical systems such as engine controls, motor drive controls, and braking systems, as well as lower voltage secondary systems including lighting, battery charging, indication lamp, pump, and information displays, and electric door openers. The conventional solution often involves the use of an input filter, a 3-phase inverter, and a low frequency transformer in order to provide electrical isolation between the overhead line voltage and the auxiliary power supply equipment. Typically, this transformer is large and bulky, adding extra mass to an already space- and weight-constrained application. Instead, isolated DC-to-DC converters can be used to meet the size, weight, and power requirements of modern railway applications. The goal is to convert the high 750V, 1500V, and/or 3000V input voltage to a regulated 24, 28, 36, 48, 72, 96, or 110 volt output. The power distribution within the train from the main supply also requires a chain of DC-to-DC conversion to the secondary systems. As stated earlier, the nominal input voltages can vary from as low as 24 volts to as high as 110 volts; from there, a regulated 3.3, 5, 12, 15,or 24 volt output is necessary. The EN 50155 European standard for railway electrical equipment requires that the nominal input voltage can fluctuate between 0.7 and 1.25 times the rated voltage. The standard also allows short-term deviations between 0.6 and 1.4 times the nominal input voltage. In other words, a 110V system would require a continuous voltage range between 67.2 volts and 120 volts as was a fluctuation voltage range from 66 volts to 154 volts. DC-to-DC converters can support wide input ranges to cover more than one nominal input voltage. For example, a converter for the common 72V and 110V railway input voltages would need an operating input voltage range from 43.2 volts to 154 volts (see Table 1). 36-160Vdc Wide Input DC-DC Converters with 3000VAC reinforced Isolation Helios offers the RHKW, RHMW, and RHDW series of mountable DC-to-DC converters rated for railway and industrial applications. These devices all offer 3,000 VAC of reinforced isolation as well as a wide input range from 36 volts up to 160 volts, allowing them to be used in 72V, 96V and 110V railway applications. RHK03W 36-160Vdc Wide Input DC-DC Converter: 3W Read more RHK06W 36-160Vdc Wide Input DC-DC Converter: 6W Read more RHK10W 36-160Vdc Wide Input DC-DC Converter: 10W Read more RHM20W 36-160Vdc Wide Input DC-DC Converter: 20W Read more RDH40W 36-160Vdc Wide Input DC-DC Converter: 40W Read more DC-DC Converters EN 50155 Approved – Related Products For technical support about our off the shelf products and customised power conversion solutions, get in touch today. Contact Our Engineering Team
New Highly Integrated DC/DC Front-end Filters for Defense and Railway Applications
At Helios, we are thrilled to announce that the new MCF series of front-end filters are now available. The MCF series was designed to comply with the requirements of MIL-STD 1275D (Characteristic of 28 volt DC electrical systems in military vehicles) and MIL-STD 461 (Requirement for the control of electromagnetic interference characteristics of subsystems and equipment). This filter series accepts 9-36Vdc input voltage (50Vdc for 1 sec.) which is suitable for military vehicle with 28V bus systems respectively 24V bus systems They are also applicable for both heavy industrial and rolling stock applications. MCF-028005-001 DC/DC Front-end Filters: 45W Read more MCF-028015-001 DC/DC Front-end Filters: 250W Read more EMI Filters EMI Filters The MCF series offers active input over-voltage protection which clamps over-voltages for maximum 50ms up to 100V to a safe level of 40V and absorbs +/-250V spikes with the internal protection circuits. By connecting the MCF module with a few additional MLCCs, its internal EMI filter meets MIL-STD 461G limits. Besides, it also features other active protection functions for an advanced protection of the DC/DC converter module such as remote on/off control, overload protection, output short-circuit protection, reverse polarity protection, inrush current limitation, etc The MCF filter module is a fully integrated front-end module. In addition to complying with MIL-STD 1275D and MIL-STD 461G, it also fulfills the EN 50155, RIA 12 and NF F 01-510 standards for rolling stock 24V bus systems. It greatly reduces the time to design the EMI-filter and peripheral circuits, save system space and provide a comprehensive system protection. The MCF filters meet the environmental MIL-STD 810F specification for shock and vibration. The operating temperature range of -40°C to 105°C (optionally -55°C) allows to use these MCF filters with DC/DC converters in a wide range of demanding applications. For technical support about our off the shelf products and customised power conversion solutions, get in touch today. Contact Our Engineering Team
Power Solutions for Traffic and Intelligent Transportation Systems
Power disturbances that impact traffic signals and Intelligent Transportation Systems (ITS) not only create potentially dangerous conditions for transportation users but immediate gridlock and congestion on arterials and outlying intersections – impacting air quality, noise levels and transit times. Year to year, traffic control system failure accounts for an immeasurable number of automobile accidents, personal injury/fatalities and insurance claims. While this is no surprise to those of us familiar with the challenges of transportation, many may be unaware that strategically deployed and reliable backup power can minimize or even neutralize the root cause of many of these problems. HOW PREPARED ARE YOU FOR THE NEXT POWER DISTURBANCE? Without a continual power supply, busy traffic intersections go dark and chaos ensues. A properly designed outdoor battery backup system keeps your traffic intersections alive. Traffic flows, accidents/injury is minimized and lives potentially saved. The FXM HP Family Power Supply (UPS) provides reliable, clean power to your traffic intersection for 8 hours or more after utility power fails. With low upfront procurement, installation and maintenance costs, backup power is within reach of your traffic operations budge. If your business is traffic operations, here are reasons why it makes sense to consider a Traffic UPS system: Provide continual power to your operating system in the event of a power outage, sag or brown out until regular utility power is restored – even in extreme weather conditions Condition and regulate the quality of the commercial power supply to your traffic system which improves reliability Keep your traffic intersections flowing and prevent or minimize severe accidents Reduce your operating expenses by eliminating false service call-outs and expensive truck rolls Power Solutions for Traffic and Intelligent Transportation Systems Power disturbances that impact traffic signals and Intelligent Transportation Systems (ITS) not only create potentially dangerous conditions for transportation users but immediate gridlock and congestion on arterials and outlying intersections – impacting air quality, noise levels and transit times. Year to year, traffic control system failure accounts for an immeasurable number of automobile accidents, personal injury/fatalities and insurance claims. While this is no surprise to those of us familiar with the challenges of transportation, many may be unaware that strategically deployed and reliable backup power can minimize or even neutralize the root cause of many of these problems. Proven solutions to fit any Traffic and ITS application: Outdoor and indoor UPS power modules with Ethernet/ SNMP remote monitoring and communication capabilities with the highest Mean Time to Failure Rate (MTBF) A wide range of weather-hardened, secure enclosures that permit flexible configuration and customization to meet specific requirements Automatic transfer and failsafe bypass switches that allow safe switching from utility to emergency power Paralleled battery configurations, stationary and portable gas-powered generators for extended run times at remote & critical locations Advanced gel-cell technology batteries featuring superior working life and reliability, and one of the longest battery warranties available Remote battery testing and diagnosis that drastically lowers maintenance time and cost. Battery heater mats to optimize battery performance in cold climates FXM HP UPS FAMILY The FXM HP is a new line of rugged UPS power modules for the most demanding environments where clean backup power is needed. FXM HP units ensure equipment in critical applications remains safe and protected from power disturbances and outages. Some of the key features of the FXM Full-colour LCD touchscreen display Front panel LEDs for alarms, progress and status indication Dual Ethernet ports for remote or local communication USB-A port for upgrades or file management via a standard USB flash drive USB-Mini B port for soft shutdown using MegaTec protocol compliant client User-programmable dry contacts for control and monitoring of key functions Customizable user configurations that can be exported and imported to other FXM HP units The FXM HP can be placed on a shelf with no other parts needed. It can also be rack or wall-mounted or secured to a shelf, such as on an outdoor enclosure shelf, with the optional mounting brackets. Choose the FXM HP 650 for ITS, 1100 for standard signalized intersections or choose the FXM HP 1000 & 2000 for larger intersections or railway crossings with multiple turn lights and other additional power requirements. Other smart features of the FXM HP family include: During periods of surge or sag in the line voltage, a wider-range automatic voltage regulation means less dependence on batteries thus lengthening battery life Cloning configuration for easy set-up of multiple units Independently programmable user inputs and dry contact relays allow controlling and tracking of key functions Event and alarm logging with time and date stamping simplifies and accelerates troubleshooting A wide operating temperature range of -40 to 74°C (-40 to 165°F)1 is suitable for extreme operating environments Temperature compensated battery charging protects batteries from over-charging at extreme temperatures, extending the life of the battery Contact Our AC UPS Expert Zeljko has 26 years of experience in the UPS (uninterruptible power supply) industry in Australia. From the service engineer role to national service manager, he was involved in negotiating, delivery, installation, commissioning and maintenance of the systems up to 1600kVA. Regardless of the rating, he is always passionate about delivering the right solution for the application and ensuring customer satisfaction as a priority. He is a very keen sailor and will use any excuse to get out on the water. Contact Our AC UPS Expert
Wall & Floor Mounted DC Power Systems for Industrial Applications
Helios Power Solutions is thrilled to announce the new range of Wall and Floor Mountable DC Power Systems OPUS HE OC0864 and OPUS HE WMC. Opus HE Wall Power Systems are ideal solutions for modernization projects, where old Thyristor Chargers (SCR – Silicon Controlled Rectifiers) are replaced with modern modular high-efficiency technology. Wall mountable chargers have a smaller footprint in electrical rooms and enable the installation to fit in a smaller space than older systems. Both systems are designed to be compact, light, easy to install, modular with a low degree of maintenance. Convection cooled modular and hot-swappable rectifiers (24V – 220VDC Output voltage) are the core component of each DC system which is controlled by the smart VIDI + I/O Controller. Main applications are critical infrastructure systems such as transmission and distribution substations, process industries and railway signaling. Robust and reliable fan-free design and modular architecture ensure the lowest total cost of ownership (TCO) across the 15-20 year expected life span of backup power systems. OPUS HE OC0864 Wall Mount DC Power System 4.5kW – 12kW Read more OPUS HE WMC Convection Cooled Battery Charger 2kW Read more Features Outputs 24V, 48V, 60V, 110V, 125V, 220VDC VIDI+ I/O controller, local and remote interfaces 12 x relays, Ethernet, Modbus, IEC61850, SNMP, RS-232 Configurable load distribution Configurable battery fuses and discharging test Optional A+B parallel supply – Dual Battery Charger and Battery Backup Systems (see page number 5 on the datasheet) Optional Multivoltage Systems including OPUS Inverters and OPUS DC-DC Converters IP20 cabinet 800x600x400mm (option IP21) Temperature-compensated battery charging Battery testing and monitoring Features Outputs 24V, 48V, 60V, 110V, 125V, 220VDC 200-250 VAC 5060Hz Nominal Input Voltage VIDI+ I/O controller, local and remote interfaces 12 x relays, Ethernet, Modbus, IEC61850, SNMP, RS-232 Maximum output power 2000W (1500W for 24 VDC models) Battery MCB for one string Optional A+B parallel supply – Dual Battery Charger and Battery Backup Systems Optional: Battery LVD, battery temperature sensor, SCADA IEC61850 IP21 cabinet 520x400x200mm For technical support about our off the shelf products and customised power conversion solutions, please get in touch. GET TECHNICAL SUPPORT FROM OUR TEAM OF ENGINEERS IN AUSTRALIA Related OPUS DC Products VIDI BM – Battery Monitoring for OPUS Power Systems Read more OPUS HE 7U Modular Battery Charger Up To 6kW Read more OPUS HE 12U Modular Battery Charger Up To 20kW Read more OPUS HE DC Power Systems MHE Rectifiers 2000W Read more OPUS INV OC0864 Modular Inverter System 6000VA Read more OPUS EDC Modular DC/DC Converter 500W to 10kW Read more OPUS DAC60000 Modular DC/AC Inverter 1-24kVA Read more OPUS HE DC Power Systems OC2066 24V – 220VDC Read more
10:1 Ultra Wide Input Range DC/DC Converters for Railway Applications
The New range of HAE150U and HAE200U DC/DC Power Converters are suitable for the harsh mechanical and electrical environment of traction vehicles and rolling stock applications. It has an ultra-wide input voltage range from 16V to 160V and covers all the input power systems of railway applications which are 24V, 28V, 36V, 48V, 72V, 96V, 110VDC. Ultra-wide input voltage converters usage has risen lately, due to the increase of onboard electronic systems such as video surveillance, access and ticketing machines, passenger device-charging USB ports, infotainment, information systems and telemetry. According to EN50155 standard (defines the supply requirements for electronic equipment in rail applications), equipment powered directly from batteries with no voltage stabilizing device must function properly with input voltages that range from 0.7VN to 1.25VN during normal operation. The equipment must also withstand input voltage drops of 0.6(VN) for 100 ms and overvoltage surges of 1.4VN for one second that may occur during startup. The HAE150U & HAE200U Series with its input voltage range from 16V -160V or 12VDC in transient operation meets stringent railway sector performance standards. Up to 93% high efficiency means a reduced requirement for cooling, and their remote on/off facility enables simple, reduced power consumption in the off condition. Plus, it reduces the capacitance of hold-up capacitors by applying the enhanced hold-up function to meet the requirements of supply interruption and change-over. HAE150U and HAE200U feature full protections, such as: over current protection, short circuit protection, output over-voltage protection, input under-voltage lockout, over-temperature protection, etc. HAE150U and HAE200U meet IEC 62368-1, EN 50155, and EN 45545-2 for ITE and railway applications. HAE150U Railway Standards Ultra Wide Input DC/DC Converter: 150W Read more HAE200U Railway Standards Ultra Wide Input DC/DC Converter: 200W Read more DC-DC Converters EN 50155 Approved – Related Products For technical support about our off the shelf products and customised power conversion solutions, get in touch today. Contact Our Engineering Team