Power supplies from China cut costs considerably

Competitive pricing from Asian manufacturers has prompted market growth of power supplies and considerable cost cuts. CONTROL Senior Technical Editor Rich Merritt provides a Product Roundup.

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Big UPS Handles Industrial Operations
The Galaxy 4000 Uninterruptible Power Supply (UPS) meets the power demands of critical data centers and industrial facilities. Available in 40, 50, 65 and 75kVA online double-conversion models, the UPS  eliminates input harmonics from utility-supplied power, corrects the input through power factor correction, and regulates voltage during surge conditions. Prices start at $35,000. MGE

Redundant Modules Make Reliable Power
SDN-P Performance Series Power Supplies have external modules that provide redundancy. They incorporate isolation diodes for protection, visual and dry contact signaling, and can isolate two power supplies to create a no-single-point of failure system. In the event of a power supply failure, the modules decouple the power supply outputs from each other so that one unit cannot overload the accompanying units. As a result, the system is assured of uninterrupted power during the failure period as well as during the ensuing replacement. Sola/Hevi-Duty

Compact Power Supplies Fit on DIN Rail
Phaseo regulated switch-mode DC power supplies are available in three models, all with overload, short-circuit, overvoltage and undervoltage protection. Models include single-phase and three-phase units with 100 to 520 V inputs, 12 or 24 VDC outputs, and ratings of 10 to 40 A.   All three deliver a voltage accurate within 3 percent, regardless of load and supply voltage. They are UL listed and CSA certified, and conform to IEC standards. Schneider Electric

Sitop And Take Notice: UPS Keeps Network Running
The 6A SITOP DC uninterruptible power source delivers up to 6 A of output current during power failures or network fluctuations to 24 VDC industrial networks. In the event of a power outage, the battery immediately cuts in. Monitoring functions include backup readiness, battery life and charge status, signaled via LEDs and floating contacts. Signaling data and diagnostic data can be also transferred directly to a  control system through an optional USB or serial interface. Siemens Energy & Automation

Remotely Resettable Electronic Circuit Breaker
The ESS20 remotely resettable electronic circuit breaker system eliminates the need for a plant electrician or technician to open a control panel and push the manual reset button to resume protection. After the source of the fault is cleared, the circuit breaker remotely resets, and production resumes It provides selective circuit protection of DIN-rail factory automation equipment connected to switch-mode power supplies, components such as sensors, actuators, field bus couplers and controls. Prices start at $30. E-T-A Circuit Breakers

DC Power Supplies
The 787 Series primary switch-mode power supplies are available in single or three phase versions with input voltages of 90-264 or 325-550 VAC, output voltages of 12 or 24VDC, current ratings of 1.3, 2, 2.5, 4, 8, 10, or 20 A, and power ratings up to 480 W.  Each has over voltage protection, short-circuit protection, surge protection, and in-rush current limiting via an NTC resistor. Prices start at $81.70. Wago

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