Power Management I Product News
LEM unveils DVL series of compact, power saving voltage transducers for traction market
LEM has introduced the DVL series for insulated nominal voltage measurements in traction applications. This family of devices spans the range from 50-2000 VRMS and incorporates LEM’s patented insulating technology. Despite achieving very high levels of isolation with a safety insulation voltage of 8.5 kV, the DVL transducer is compact and measures only 137.8 x 63 x 64.3 mm. It is fully compatible with previous generations of transducers in terms of both functions, performance and footprint and offers new high levels of accuracy and temperature stability.
The DVL has been designed to be fully compliant with the International Railway Industry Standards (IRIS), providing engineers in the railway industry, who are working with both rolling stock and sub-stations, with a versatile new transducer that is equally applicable to measuring network voltages, or the main converter DC link on-board trains. The feature set of the DVL voltage transducer also makes it an excellent fit for a broad range of small-to- medium voltage measurements in industrial markets.
DVL transducers measures voltages by a direct connection on its primary side, transfers the data across an internal isolation barrier and outputs a current from its secondary side that is proportional to the measured voltage thanks to LEM’s patented insulating digital technology. It delivers an improved overall accuracy, compared to existing products, of +/- 0.4 % at +25°C with a higher stability in temperature. The technology
Power Integrations launches TinySwitch-4 off-line switcher IC family
used provides very high levels of immunity to external magnetic fields (almost insensitive) and electromagnetic disturbances (unmatched level). Its measurement frequency bandwidth (-3dB point) is 14 kHz and the DVL consumes only 20 to 25 mA when power supplied under +/-24 VDC (power supply range from +/- 13.5 to +/- 26.4 V), a power saving of 30% relative its predecessors. 2 kinds of current output ranges are possible either +/- 50 mA, or the standard industrial current-loop range of 4 to 20 mA. In addition to using less power the DVL, in its small outline, is 30% lighter than transducers already in the market. Other key features include a high level of partial discharge extinction voltage, and compliance to a range of internationally-recognised safety standards in addition to its adherence to IRIS specifications. It also exhibits a fast response time and excellent noise immunity. A range of connection configurations, on both the primary and secondary side, increases flexibility for the user.
LEM |
www.lem.com
Power Integrations has introduced the TinySwitch-4 family, the latest generation of its TinySwitch series of off-line switcher ICs. Featuring line- compensated overload power protection, the devices reduce the maximum overload power that can be delivered into the load over the entire AC input voltage range. The devices incorporate a 725 V MOSFET that allows 80 percent de-rating for high reflected voltage and high bus-voltage designs. Efficiency of greater than 70 percent at five percent load enables designers to meet the stringent European standby specifications scheduled to take effect in 2013, while no-load power consumption of less than 30 mW at 230 VAC meets critical energy-saving requirements in the market today.
The line-compensated overload power
protection of TinySwitch-4 ICs is particularly helpful in applications such as PC standby and appliances where unusually high current demands from the load may be indicative of a fault.
New monitoring relays help meet safety guidelines
Marl extends high efficiency LED driver range
Marl International has extended its range of LED drivers with a wide range of new dimmable and non-dimmable LED power supplies offering up to 90% efficiency, in support of the new high efficiency Citizen LED lighting products. Marl is the UK distributor for both Citizen and driver
manufacturer Magtech. Magtech
LED drivers are designed for general lighting
applications such as channel letters, architectural, decorative, accent, landscape, transportation, safety and many other lighting applications where LED is being used.
The new additions include the ESL1048 and ESL1025 series of 48 and 25 Watt 1-10V dimming driver power supplies. These linear shape drivers can operate from 100-277VAC and employ terminal blocks for easy installation. They are suited for fluorescent replacement, flat panel edge-lit and linear accent lighting applications. LP1040 AC-Dimm series of 40 Watt, AC Line ELV dimming driver power supplies are IP66 sealed and operate from a 90-277V AC supply. This series is equally suitable for indoor and outdoor locations including wet or damp conditions. For lower power applications, the highly compact
18 October 2012
ESL1012 12 Watt, AC Line ELV and Triac dimming driver has been added. Available either 110VAC or 220VAC input, the ESL1012 is just 6.6cm in diameter by 2.7cm high. These drivers comply with UL8750, Class 2 safety Standards. Also new is the LF2200-xx, which provides two independent outputs in the range of 100- Watts each, with an efficiency of up to 90%. The forward voltage is ranged from 50 to 286Vdc, making it ideal for applications that employ large quantities of LEDs in series. The driver features an IP67 sealed waterproof enclosure, making it equally suitable for dry, damp and wet locations. Magtech’s state-of-
the-art electrical design
ensures that this series complies with UL Class 2 criteria and its unique compact packaging complies with NEMA4 and IPx6 standard, UL category 1310, UL879 and NEC standards. All models are designed to meet energy conservation requirements. Marl can also source customised Magtech LED drivers to support bespoke requirements. The announcement follows the introduction by Marl of Citizen LEDs in a range of five types with light outputs from 100 lumens to 17,675 lumens. The key feature of the range is its exceptional luminous efficiency. They are 40% more efficient than the manufacturer’s existing products and achieve 155 lm/W. Marl has also introduced Citizen’s new low wattage, high efficiency LEDs rated at 0.06W, 0.1W and 0.2W. Ideal for use in arrays where low heat output and exceptional uniformity of brightness are required, these LEDs deliver up to 139 lm/W.
Marl International |
www.led.co.uk Components in Electronics
Finder’s new 70 Series modular rail-mounted monitoring relays offers a flexible solution when it comes to monitoring a range of electrical supply parameters, in compact, easy to adjust units. For example, machine safety legislation (IEC/EN/BS60204-1) requires that portable or semi-portable motor-driven equipment be prevented from starting up in the wrong direction should the local phases be reversed, and a phase reversal monitoring relay can provide for that. Finder’s new relays are able to monitor supplies to machinery, equipment, and installations where failure or variation outside acceptable limits may result in damage to
The TinySwitch-4 family is a scalable family of devices covering an extended power range up to 36.5 W and there are three package options available: the industry standard PDIP and SOIC packages, and the new SMD eSOP package which enables designers to eliminate external heatsinks, instead using PCB copper area for thermal dissipation.
Power Integrations |
www.powerint.com
equipment, danger to personnel, or disruption to critical processes or procedures.
Featuring ‘positive safety logic,’ the 70 Series
ensures that any failure mode results in the output relay assuming its de-energised position. With a selectable fault memory (lock-out), safety is increased by preventing uncontrolled restarting of equipment. Within the 70 Series range are units designed to monitor single and 3-phase supplies for under- voltage, over-voltage, voltage within set limits, and for neutral loss, phase loss, phase rotation and asymmetry.
The four monitoring relays in the 70 Series
range (three of which are multifunctional) offer a selection of voltage limits between 170 – 270 for single phase, and 300 – 480 for three-phase supplies, a switch off delay time between 0.5 – 60 seconds, and 4 – 25% variation of phase asymmetry. The modules are available in 17mm or 35mm, dependent on type.
Finder |
www.findernet.com
Phihong launches 30W adapter for ultra- portable applications
Phihong USA, a supplier of power adapter solutions for multinational OEMs, has developed a compact 30W adapter designed to power netbook computers. Designated the PSA30W-190A, it is Phihong’s smallest 30W, Level V efficient adapter and produces an output of 19V and 1.6–1.8A, which is suitable for powering portable computers. “The personal computing market is shifting towards slim, lightweight, highly portable, and more business-focused ultrabooks that are designed to reduce overall bulk in briefcases and travel bags. Consequently, their power adapters must follow suit,” said Keith Hopwood, vice president of marketing for Phihong USA. “The batteries in these new, slim-line computers are more efficient than those in traditional notebook computers and require much less overall power.” The PSA30W is the smallest 30W adapter manufactured by Phihong, and the 19VDC output makes it an efficient option for charging a netbook’s lithium-ion battery pack. Standard features include over-current, over-voltage, and short-circuit protections, and a no-load power draw of less than 0.2W. The PSA30W meets all
of the requirements for Level V efficiency markings, as well as bears safety approvals from TUV, CE, and cUL/UL. The unit measures 80mm x 35mm x 24mm and weighs approximately 110 grams. The 1.5- meter DC cord is terminated with a 2.5mm x 5.5mm x 9.5mm center positive barrel. Additionally, Phihong offers an in-house service for changing DC tips with no minimum order quantity required.
Phihong |
www.phihong.com www.cieonline.co.uk
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