(01/08/08) Standards institutions are responding to the increasing complexity of medical electrical equipment and the associated requirements for safe operation by imposing new and extended tests in respect of electrical safety. …
(The complete text is available for download):Download Text (334 KB)Download Photo (319 KB)(04/18/07) Bender’s CME420 current relays monitor AC currents, checking for undercurrents and overcurrents. They also monitor the current between two threshold values (window function). Currents are measured as r.m.s. values (AC). The latest measured value is indicated permanently on the LC display.
..... (The complete text is available for download):Download Text (321 KB)Download Photo (428 KB)(11/30/06) The new Bender MK800 remote alarm indicator and test combination is designed to be used for the indication of operating status and alarm messages. Typical application fields are power supply systems in healthcare facilities in accordance with DIN VDE 0100-710:2002-11 / IEC 60364-7-710:2002-11 and power supply systems in industrial and functional buildings.
..... (The complete text is available for download): Download Text (323 KB)Download Photo (144 KB)(04/15/06) The AC and pulsed DC sensitive residual current monitor RCMA420-D (Type B) from Bender is designed for fault and residual current monitoring in earthed power supply systems (TN and TT systems) where an alarm is to be activated in the event of a fault, but disconnection must be prevented. In addition, the device can be used to monitor the current in single conductors, such as PE conductors, N-PE connections and PE-PAS connections. Due to the use of measuring current transformers, the device is nearly independent of the load current and the nominal voltage of the system. ..... (
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Download Text (319 KB)Download Photo (132 KB)(04/15/06) The voltage relays VME420/VME421H from Bender monitor undervoltages, overvoltages and the voltage between two threshold values(window discriminator function) in AC and DC systems of 0...300 V. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display.The measured value leading to the activation of the alarm relays will be saved. Due to adjustable response times, installation-specific characteristics, such as device-specific making currents, short-time current fluctuations, cooling down periods, etc. can be considered. Version VME420 requires separate supply voltage, version VME421H operates without additional supply voltage. ..... (
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Download Text (318 KB)Download Photo (336 KB)(04/15/06) The insulation monitoring device A-ISOMETER® IRDH275BM-7 together with the coupling device AGH675S-7 monitors the insulation resistance of unearthed medium voltage systems (IT systems). It is suitable for universal use in 3 AC, AC/DC and DC systems up to 7.2 kV. AC systems may include extensive DC-supplied loads. The AMPPLUS measuring principle meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. Taking the system leakage capacitances into account the IRDH275BM-7 automatically adapts itself to the existing system conditions in order to optimize the measuring time. ..... (
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Download Text (318 KB)Download Photo (113 KB)
