Medical IT System Insulation Monitoring and Fault Locating Devices
The medical IT system is mainly used in important Class 2 medical locations such as operating room, ICU/CCU intensive care unit, providing safe, reliable and continuous power distribution for the important equipment at these locations. Medical insulation monitoring and fault locating device is developed by the many years' design experience of the Acrel Electric in electric power meter industry, according to the special requirements of the insulation monitoring and fault locating of the power distribution system in Class 2 medical locations. The products can realize the real-time monitoring of insulation, load and temperature of isolation transformer in IT system, and have the functions of system insulation fault loop positioning and centralized monitoring by multiple pieces of systems. Products conform to the provisions of enterprise standard Q31/0114000129C013-2016 IT System Insulation Monitoring Instrument. Medical IT system insulation monitoring and fault locating products (seven-piece set) include AITR series medical isolation transformer, AIM-M200 medical intelligent insulation monitoring instrument, AKH-0.66P26 current transformer, AIL150-4/AIL150-8 insulation fault locator, ASG150 test signal
generator, HDR-60-24 power module and AID150 centralized alarm and display instrument, which are shown in Table 1.
AIM-M series monitor the insulation resistance of a medical IT system with AC 70…264 V. In addition, the load current and the temperature of the IT system transformer are monitored. Alarms and measured values are provided to other
bus devices via the CAN/RS-485 interface. For display and signalling purposes, the use of special alarm indicator and test combinations is recommended.
After detection of an insulation fault, the internal locating current injector of the AIM-M300/SG models enables insulation fault location. The use of special devices of the AIL150/160 series is recommended to locate the insulation fault.
The maximum permissible system leakage capacitance is 5 μF.
In order to meet the requirements of applicable standards, customised parameter settings must be made on the equipment in order to adapt it to local equipment and operating conditions. Please heed the limits of the range of application indicated in the technical data.
• Insulation monitoring for medical IT systems
• Adjustable response value for insulation monitoring
• Locating current injector for insulation fault location systems
• Load and temperature monitoring for IT system transformers
• Adjustable load current response value
• Temperature monitoring with PT100 thermistor
• Self monitoring with automatic alarm
• PE connection monitoring
• Internal/external test button
• Configurable alarm relay: N/O or N/C operation selectable
Medical IT system in accordance with IEC 60364-7-710, IEC 61557-8, IEC 61557-9 and DIN VDE 0100-710.
AIM-M200 series complies with the requirements of the device standards:
• DIN EN 61557-8 (VDE 0413-8): 2015-12/Cor1: 2016-12
• DIN EN 50155: 2018-05
• EN 45545-2:2016
• IEC 61557-8: 2014/COR1: 2016
• EN61373 cat I class B
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