Application of ACREL Medical IT Insulation Device in Vietnam Hospitals

Application of ACREL Medical IT Insulation Device in Vietnam Hospitals

1.Background

Electric shock and system fault caused by power distribution system are mostly caused by the grounding fault of equipment line. Grounding fault will directly bring the harm of power supply interruption; when the earth fault leakage is serious, it will even burn electrical equipment or lines, causing irreparable loss.

In Medical places, especially those life-threatening class 2 medical places, patients in surgery or anesthesia state, without self-behavior ability, small leakage current can lead to electric shock death of patients. Therefore, the electrical design of this special place should be carried out strictly in accordance with the relevant national standards and specifications.

IT power distribution system (also known as isolated power supply system or ungrounded

system) has very small leakage current to ground due to its neutral point ungrounded. When the first insulation fault occurs, the power supply of the equipment will not be affected. So the system can continue to operate. The insulation monitoring device installed in the system can detect the fault in time and send out the corresponding fault warning, prompting the relevant personnel to remove the fault at the appropriate time. For the operation room, intensive care unit and other medical places with high requirements for power supply continuity and safety, local IT system power supply can ensure the security and reliability of power supply for important loads.

2. Project Information

Ky Anh's medical center is a medical institution in Vietnam. At present, due to the improvement of medical facilities, it has introduced 5 sets of insulation monitoring products for the operating room.

3 Description of four sets of medical IT products

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 (four-piece set) include AITR series Medical Isolation Transformer, AIM-M10 medical intelligent insulation monitoring instrument, AKH-0.66P26 Current Transformer, and AID series(AID10.AID130.AID150) centralized alarm and display instrument, which are shown in Table 1

Name and type		Product Pictures	Descriptions
AITR series medical isolation transformer			AITR series isolation transformer is specially used in medical IT system, and the core superposition adopts the silicon steel sheet imported from Japan, which has very small losses. The windings are treated with double insulation and have electrostatic shielding layer, which reduces electromagnetic interference between windings. The PT100 temperature sensor is installed in the windings to monitor the temperature of transformer. The whole body is treated with vacuum invasion paint, which increases mechanical strength and corrosion resistance. The product has good temperature rise performance and very low noise.
medical insulation monitoring device			AIM-M10 medical insulation monitoring device is special for medical IT system.It is used to monitor the insulation status of IT system.It can send out alarm signals when insulation fault occurs.
AKH-0.66 P26 current transformer			The AKH-0.66P26 type current transformer is the protective current transformer which the maximum measurable current is 60A and the transformation ratio is 2000:1. The current transformer is directly fixed inside cabinet by screwing
AID series external alarm and displayer	AID10		It is suitable for wall installation embedded and can monitor 1 AIM-M10 insulation monitor. It has sound and light alarm function of insulation, overload, overtemperature and equipment failure, and RS485 communication
	AID150		LCD display, RS485 bus, centralized monitoring of up to 16 SETS of AIM-M10 Medical Intelligent Insulation Monitor data, sound and light alarm can be remote. The AID150 can also monitor data from multiple AIM-R100 residual current monitors.

4 Typical application of isolated power supply system

Bibliography

1.Solutions for enterprise micro-grid system