High-reliability power supplies for industrial, information, and communications uses offered by TDK-Lambda

May 9, 2024
These power electronics devices also feature a low-energy-inrush current on initial startup to reduce nuisance tripping of input circuit breakers.

SAN DIEGO – TDK-Lambda Americas Inc. in San Diego is introducing high-power three-phase AC input DIN rail mount power supplies for conventional switch cabinets, stand-alone machinery, industrial, information, and communications technology.

These high-reliability power supplies have 24-, 48- and 72-volt outputs, and are rated for continuous operation at 480 or 960 Watts and can deliver a boost of 720 and 1440 Watts respectively for as long as seven seconds to operate with capacitive and inductive loads.

These power electronics devices also feature a low-energy-inrush current on initial startup to reduce nuisance tripping of input circuit breakers.

The DRB three-phase series has an input range of 350 to 575 volts AC and comes in a rugged metal enclosure with dimensions of 65 by 129 by 159.3 millimeters for the 480-Watt models and 100 by 129 by 171.9 millimeters for the 960-Watt model.

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This saves space on the DIN rail for other components and reduces cost. A choice of screw terminals or push-in connectors are available for the input and output wiring.

The DRB480 and 960 models have an operating efficiency to 96.3 percent and a stand-by power consumption of less than 2.3 Watts when using the remote on-off function. Lower losses also reduce internal heating inside the power supplies, preventing electrolytic capacitor dry-out for long field life.

For higher-power or redundant systems, the front panel DIP switch enables droop mode current sharing for parallel operation. These models have an adjustment range of 22.5 to 29 volts, 45 to 56 volts, and 70 to 85 volts to compensate for cable drops, ORing FETs, or setting to non-standard output voltages.

In addition to two LED indicators, a DC OK relay contact is available for remote monitoring and remote on/off is possible by applying an external voltage to the inhibit relay contact.

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Input to output isolation is 3,510 volts AC, input to ground 2,210 volts AC, and output to ground is 1,390 volts AC. The DRB models are convection cooled and rated for operation in -25 to 70-degree-Celsius ambient temperatures, with derating above 55 C.

The units are certified to IEC/EN/UL/CSA 62368-1, 61010-1, 61010-2-201 and are CE / UKCA marked to the low voltage, EMC, and RoHS directives. They meet EN 55011-B and CISPR11-B radiated and conducted emissions. The series also complies with EN 61000-3-2 (Class A) harmonic currents and IEC/EN 61000-6-2 immunity standards.

For more information contact TDK-Lambda online at www.us.lambda.tdk.com.

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