浅谈医疗IT电源系统在某医院中的应用
摘要：本文主要阐述了IT隔离电源系统在深圳市第三人民医院ICU、手术室内的应用，以及IT隔离电源系统的重要性、优点及注意事项。
Abstract: This article mainly describes the application of IT isolated power system in ICU and operating room of the Third People's Hospital of Shenzhen city, as well as the importance, advantages and matters needing attention of IT isolated power system.
关键字：IT 隔离电源、系统、接地
Key words: IT isolated power supply, system, ground
1、项目概况 Project overview
深圳市第三人民医院项目，位于龙岗区布吉镇李朗立交桥西南侧，建设用地 100005 ㎡，总建筑面积 81737 ㎡，包含门诊楼和医技科研楼、住院楼、行政楼、学术报告厅等共十四栋建筑及配套道路、广场、绿化等。为深圳市重大建设项目，是一所与中心城建设相配套适应 深圳市规划发展的现代化的平战结合的传染病医院。是集医疗、科研、防保、教学与康复为 一体的“三级”传染病医院。
The project of Shenzhen Third People's Hospital is located in the southwest side of Lilang overpass in Buji Town, Longgang District. The construction area is 10,0005 ㎡, and the total construction area is 81,737 ㎡, including 14 buildings such as outpatient building, medical technology research building, inpatient building, administrative building and academic lecture hall, and supporting roads, squares and greening, etc..As a major construction project of Shenzhen city, it is a modern infectious disease hospital which is compatible with the construction of the central city and ADAPTS to the planned development of Shenzhen city.It is a three-level infectious disease hospital integrating medical treatment, scientific research, prevention and protection, teaching and rehabilitation.
2、关于设置 IT 隔离电源系统的相关规范要求
Specification requirements for setting up IT isolated power system
随着社会经济的不断发展，大型综合型的现代化医院不断投入建设，因而医院电气安全可靠也引起来业界的重视，其中关于 ICU、手术室等重要场合的配电安全可靠越来越引起业界重视。尤其是关于IT隔离电源的设置。GB16895.24-2005/IEC60364-7-710:2002 标准中规定，在医疗领域2类医疗场所内，用于维持生命的、外科手术的和其他位于“患者区域”内的医疗电器设备和系统的供电回路应选用带绝缘监视的医疗IT系统供电。2008年8月1日正式实施的《民用建筑电气设计规范》中12.8.6对医疗场所采用的IT系统供电做了相应要求和规定。
With the continuous development of society and economy, large comprehensive modern hospitals are constantly put into construction, so the electrical safety and reliability of hospitals have also attracted the attention of the industry.The safety and reliability of power distribution in important occasions such as ICU and operating room have attracted more and more attention from the industry. Especially with regard to IT isolation power Settings.According to gb16895.24-2005 /IEC60364-7-710:2002, the power supply circuit for life-sustaining, surgical, and other medical electrical equipment and systems located in the "patient area" in class 2 medical facilities in the medical field shall be powered by medical IT systems with insulation and monitoring.12.8.6 In the Civil Building Electrical Design Code officially implemented on August 1, 2008, the corresponding requirements and regulations are made for the POWER supply of IT system used in medical places.
（1）在2类医疗场所内，用于维持生命、外科手术和其他位于“患者区域”内的医用电气设备和系统的供电回路，均应采用医疗IT系统。
In class 2 medical facilities, the medical IT system shall be used for the power supply circuits for life-sustaining, surgical and other medical electrogas equipment and systems located in the "patient area".
（2）用途相同且相毗邻的房间内，至少应设置一回独立的医疗IT系统，并配有绝缘监测器。
Separate medical IT systems should be installed at least once in adjacent rooms for the same purpose.And it is equipped with insulation monitor.
（3）每个医疗IT系统应设在医务人员可以经常监视的地方，并应装设配备有声光报警系统。
Each health IT system should be located where medical personnel can monitor IT regularly and should be equipped with an audible and visual alarm system.
（4）医疗IT变压器应装设过负荷和过热的监测装置。
Medical IT transformers should be equipped with monitoring devices for overload and overheating.
12.8.10中对辅助等电位联结做了相关规定。同时，在条文说明中规定12.8.1-12.8.6，12.8.10是根据国家标准《特殊装置或场所的要求医疗场所》GB16895.24的规定。其中2类场所包括：抢救室（门诊手术室）、手术室、CU 室、导管介入室、血管照影检查室。
In 12.8.10, relevant provisions are made for auxiliary equipotential connection.At the same time, 12.8.1-12.8.6 are stipulated in the provisions of 12.8.10 in accordance with the national standard "Medical Places required by Special Devices or Places" GB16895.24.The two types of places include: emergency room (outpatient operating room), operating room, CU room, catheter intervention room and angiography room.
3、IT 隔离电源系统简介及医院采用的重要性 Introduction of IT isolated power system and importance of hospital adoption
1）IT隔离电源系统，I表示电源侧没有工作接地，或经过高阻抗接地。T 表示负载侧电气设备进行接地保护。IT系统在供电距离不是很长时，供电的可靠性高、安全性好。一般用于不允许停电的场所，或者是要求严格地连续供电的地方，医院的手术室、急救室和ICU室等二类场所必须采用IT系统。运用IT方式供电系统，即电源中性点不接地，一旦设备漏电，单相对地漏电电流很小，不会破坏电源电压的平衡，因此可以避免电击等电气事故，同时不足以使回路保护电器动作切断电源，保证供电的不间断。所以比电源中性点接地的系统安全、可靠。
IT isolates the power system, and I indicates that the power side is not working grounded, or is grounded through high impedance.T represents the grounding protection of the electrical and gas equipment at the load side.IT system in the power supply distance is not very long, the reliability of power supply is high, good security.Generally used in places where blackouts are not allowed, or where strict continuous power supply is required, IT systems must be used in hospital operating rooms, emergency rooms, ICU rooms, and other type ii places.The use of IT mode power supply system, that is, the neutral point of the power supply is not grounded, once the equipment leakage, single-phase leakage current to the ground is very small, will not destroy the balance of the power supply voltage, so IT can avoid electric shock and other electrical accidents, at the same time is not enough to make the circuit protection electrical equipment action cut off the power supply, to ensure the uninterrupted power supply.So than the power neutral grounding system is safe and reliable.
2）医院使用隔离电源系统的重要性和必要性。
The importance and necessity of using isolated power systems in hospitals.
众所周知，当用电设备对人体心脏直接漏电大于10uA 时，会造成对病人的微电击事故。
而在一般通用建筑中所采用的对地漏电保护开关，其动作响应值是mA 级（如：30 mA），远远不能满足医疗领域的需要。在医院的特殊环境里，漏电流对病人构成了潜在的危险，因此对电气安全设计也提出了特殊的要求。尤其是那些生命攸关的场所，如外科手术室、重症监护室、心脏手术室等地均需安装医用IT隔离电源系统，其目的就是为了保证对该场所内的医疗电器提供一个安全可靠的电源，以确保病人的安全。在导电体触及到心脏(例如，打开心脏的手术或埋置心脏起搏器)时，在普通安全接地的导体之间流过的细微电流会造成微电击和死亡的可能。隔离变压器就象一个门一样，将医疗地区的非保护区域和保护区域的电气线路隔开，保护区域内所有带电导体是与地隔离的，防止线路绝缘层上危险电流造成微电击。绝缘监视仪必须与隔离变压器配合使用，用来连续监视隔离变压器二次侧的带电导体与地之间的电阻及电流，例如，手术过程中流出体外的血液和金属制的手术台可能会使病人与地形成一个通路，这样就存在预期危险电流，一旦医疗电子设备的导电体也形成对地通路(如漏电)，将会造成宏电击(不是所有电流都流经心脏)或微电击(所有电流都流经心脏)。一般供电电网是以大地作为参考电位，相线中的电流可以通过任何未绝缘的通道，对地构成回路，这是电击的根本原因。隔离供电是采用隔离变压器供电，电源经隔离变压器后，原电网中的地已不再是参考电位了。隔离变压器任何一根输出线都不能与地构成回路，只能在两根输出线之间构成回路，这就提高了供电的可靠性。用隔离变压器以分隔非保护区域与保护区域，在隔离变压器的次级引出IT系统的电源，以防止产生接地故障电流。将IT系统引入手术室或急救室，在房间内设一配电箱，箱内放置绝缘监视仪，绝缘监视仪的使用可以及早的显示隔离变压器次级负载部分的绝缘状况，在发生绝缘故障对人身构成威胁前就提供报警信号。而此时电源不会被切断，保证了供电的连续性，医护人员此时可以根据监视仪上显示的漏电流大小和手术的实际情况及时处理，因而人身触电的危险被降低到了最小。
It is well known that when the direct leakage of electrical equipment to the human heart is greater than 10uA, it will cause a micro-shock accident to the patient.
However, the action response value of the earth leakage protection switch used in general general buildings is mA level (such as: 30 mA), which is far from meeting the needs of the medical field.In the special environment of hospital, leakage current poses a potential danger to patients, so special requirements are put forward for electrical safety design.In particular, those vital places, such as surgical operating rooms, intensive care units, cardiac operating rooms, etc., need to install medical IT isolation power system, the purpose of which is to ensure a safe and reliable power supply to medical appliances in the site, so as to ensure the safety of patients.When the conductor touches the heart (for example, during open-heart surgery or embedding a pacemaker), the tiny currents flowing between normally safely grounded conductors can cause micro-shocks and the possibility of death.The isolation transformer acts as a door separating the non-protected area of the medical area from the electrical wiring in the protected area. All live conductors in the protected area are isolated from the ground to prevent the dangerous current on the line insulation from causing a micro-shock.Insulation monitors must be used together with the isolation transformer, used for continuous monitoring isolation transformer secondary side of charged conductor and earth between the resistance and current, for example, in the process of the operation flow of blood and in vitro metal table may make the patient and to form a path, so there are dangerous currents, once the conductor in the medical electronic equipment form of pathways (such as leakage), will cause the macro electric shock (not all current flows through the heart) or micro electric shock (all electric current flows through the heart).Generally, the power supply network takes the ground as the reference potential, and the current in the phase line can pass through any uninsulated channel to form a circuit to the ground, which is the root cause of electric shock.Isolated power supply is the use of isolated transformer power supply, power through the isolated transformer, the original grid is no longer a reference potential.None of the output lines of the isolating transformer can form a circuit with the ground, but can only form a circuit between two output lines, which improves the reliability of power supply.The isolating transformer is used to separate the unprotected area from the protected area, and the power of the IT system is extracted at the secondary of the isolating transformer to prevent the generation of ground fault current.The IT system will be introduced into the operating room or emergency room, and a distribution box will be set in the room, and insulation monitors will be placed in the box. The use of insulation monitors can show the insulation status of the secondary load part of the isolation transformer as early as possible, and alarm signals will be provided before the insulation failure poses a threat to the person.At this time, the power will not be cut off, to ensure the continuity of power supply.Medical staff can then monitor the leakage current and the actual operation, so that the risk of personal shock is minimized.
4、深圳市某医院 IT 隔离电源系统的配置情况 Configuration of IT isolated power supply system in a hospital in Shenzhen city
深圳市某医院在所有手术室和ICU装设有医用IT隔离电源系统。具体组成包括隔离变压器、绝缘监视仪、外接报警和显示仪、电流互感器等，该系统集绝缘监视的连续性，提高防火负荷监视和变压器温度监视于一体，降低了接触电压和对地漏电流，使人身触电危险降低到最小程度，大大提高了事故预防能力，保持供电安全性。深圳市某医院选用的是德国本德尔IT隔离电源系统，其系统图如下：
A hospital in Shenzhen has installed a medical IT isolated power system in all operating rooms and ICUs.Specific composition including isolation transformer, insulation monitors, external alarm and display, current transformer, etc., the system sets the continuity of insulation monitoring, monitoring, and improve the fire load transformer temperature monitoring at an organic whole, reduces the contact voltage and the floor drain current, make person get an electric shock hazard to minimize, greatly improve the ability of accident prevention, to keep the power supply security.A hospital in Shenzhen city chose Bendell IT isolated power supply system from Germany. 系统图如下： The system diagram is as follows:
1）ICU中的IT隔离电源系统如下：
The IT isolated power system in the ICU is as follows:
每个ICU装设一套6.3KVA IT系统（含6.3KVA隔离变压器ES710，绝缘监视仪107TD47，电流互感器STW2，外接报警显示和测试仪MK2007CBM-CN，仪器专用电源AN450）。
Each ICU is equipped with a set of 6.3KVA IT system (including 6.3KVA isolation transformer ES710, insulation monitor 107TD47, current transformer STW2, external alarm display and tester MK2007CBM-CN, special instrument power supply AN450).
2）手术室中IT隔离电源系统图 Diagram of IT isolated power supply system in operating room
每个手术室装设有一套8KVAIT隔离电源系统（含隔离变压器8KVA、绝缘监视仪、专用电源、外接报警显示和测试仪MK2007CBM-CN）。
Each operating room is equipped with a set of 8KVAIT isolated power supply system (including isolation transformer 8KVA, insulation monitor, special power supply, external alarm display and tester MK2007CBM-CN).
3）系统设备功能: System and equipment functions:
a)绝缘监视仪 Insulation monitor
-绝缘监视报警系统符合IEC61557-8、IEC60364-7-710标准。
- 为医疗IT系统专用绝缘监视仪
- 绝缘监视、负荷监视和隔离变压器温度监视功能
- 带背光的液晶显示
- 绝缘监视响应值调节范围50kΩ-500Ω
- 过负荷监视响应值调节范围5A-50A
- 输出报警继电器
- RS485接口
- 测量值模拟电流信号输出
- 内置或外接自检按钮
- 接线监视
- 导轨安装
-交流内阻抗应至少为100kΩ;
-测试电压不大于直流25V;
-即使在故障情况下，其注入电流的峰值不大于1Ma;
-最迟在绝缘电阻降至50kΩ时，应发出信号,并配置试验此功能的器具。
- Insulation monitoring and alarm system conforms to IEC61557-8 and IEC60364-7-710 standards.
- Special insulation monitors for medical IT systems
- Insulation monitoring, load monitoring and isolation transformer temperature monitoring functions
- LCD with backlit display
- insulation monitoring response value adjusting range 50kΩ-500Ω
- Adjustment range of overload monitoring response value 5A-50A
- Output alarm relay
- RS485 interface
-Measured value analog current signal output
- Built-in or external self-check button
- Wiring monitoring
- Guide rail installation
- ac impedance should be at least 100kΩ;
- The test voltage shall not be greater than dc 25V;
- Even in the case of fault, the peak value of its injected current is not greater than 1Ma;
- the latest in insulation resistance to the 50 kΩ, should be a signal.And the apparatus for testing this function is configured.
b)隔离变压器 Isolating transformer
-满足《建筑物电气装置 第 7-710 部分：特殊装置或场所的要求—医疗场所
GB16895.24-2005/IEC60364-7-710:2002 710.512.1.6中规定:医用隔离变压器应符合IEC61558-2-15的要求。
- 容量 3.15-10kVA
- 绕组内部安装温度传感器
- 噪音低于 35 分贝
- 变压器紧靠医疗场所安装，安装在柜内或外护物内以免被无意地接触期带电部分。
-变压器的二次侧额定电压 Un 不超过 250V，用于移动式和固定式设备的医疗 IT 系统采用单相变压器，其额定输出容量不小于 0.5Kva，不超过 10Kva。
-隔离变压器的金属外壳与局部等电位联结端子板联结。
- Meeting electrical installations in buildings - Part 7-710: Requirements for special installations or places - Medical places
It is stipulated in GB16895.24-2005/IEC60364-7-710:2002 710.512.1.6 that medical isolating transformers shall meet the requirements of IEC61558-2-15.
- 3.15-10 kva capacity
- Temperature sensor is installed inside the winding
- Noise below 35 decibels
- The transformer is installed close to the medical site, in the cabinet or in the outer sheath to avoid inadvertent contact with live parts.
- the rated voltage on the secondary side of the transformer shall not exceed 250V. Medical IT systems for mobile and stationary equipment shall adopt single-phase transformers with rated output capacity of not less than 0.5Kva and not more than 10Kva.
- The metal housing of the isolating transformer is connected with the local equipotential connection terminal plate.
c) 外接报警显示和测试仪 Alarm and displaying device
- 绝缘监视仪的外接报警和显示装置
- 数码管显示绝缘阻值和负荷状况
- 蜂鸣器声报警及消音按钮
- RS485 接口
- 中文面板
- 防水面板易清洗
-实时监视隔离变压器负荷状况及变压器的绕阻温度。
-一只绿灯亮表示工作正常；
-当绝缘电阻下降到最小整定值时，一只黄灯亮。应不能消除或断开这个亮灯指示；
-当绝缘电阻下降到最小整定值时，音响报警动作。该音响报警可以解除；
-当故障被清除恢复正常后，黄色信号应熄灭。可监测医疗IT变压器的负荷过热。
- External alarm and display devices for insulation monitors
- Digital tube displays insulation resistance and load status
- Buzzer sound alarm and mute button
- RS485 interface
- Chinese panel
- The waterproof panel is easy to clean
- Real-time monitoring of isolating transformer load condition and transformer winding temperature.
- A green light indicates normal operation;
- A yellow light lights up when the insulation resistance drops to the minimum setting value.This light indicator should not be eliminated or disconnected;
- When the insulation resistance drops to the minimum setting value, the sound alarm action.The audible alarm can be cancelled;
- When the fault is cleared and restored to normal, the yellow signal should go out.Can monitor overload overheating of medical IT transformers
5、IT 隔离电源系统有以下优点:
IT isolated power system has the following advantages:
1）触电电压和漏电电流很小，不足以引发电击或其它电气事故；
1) The shock voltage and leakage current are too small to cause electric shock or other electrical accidents;
2）供电系统出现对地故障时，不会导致回路保护电器动作切断电源，保证了供电的不间断。
2) In case of ground fault of the power supply system, the circuit protection device will not cut off the power supply, which ensures the uninterrupted power supply.
6、采用IT隔离电源系统的注意事项
Precautions for using IT to isolate power systems.
1）IT 系统不能引出中性线，因为在中性线发生接地故障时绝缘监测仪无法故障报警，系统将变为 TT 或 TN 系统，再发生相线接地故障，则系统电源将被切断，可能会产生严重后果。
1) The IT system cannot lead out the neutral wire, because the insulation monitor cannot give an alarm when the neutral wire has ground fault, and the system will
If TT or TN system is changed, the power supply of the system will be cut off if the phase-to-ground fault occurs again, which may have serious consequences.
2）由于 IT 系统发生一相接地时，另两相对低电压将升高，因此对电气线路及电气设备绝缘水平要求较高。
2) The other two relatively low voltages will increase when the IT system is connected to the ground, so the electrical circuits and electrical equipment are insulated, the level is high.
3）IT 系统的绝缘监测仪需通过 PE 线接地，因此其与PE线的连接必须可靠。
3) The insulation monitor of the IT system needs to be grounded through the PE wire, so its connection with the PE wire must be reliable.
7、 安科瑞医疗IT隔离电源系统的介绍
An introduction to the Acrel Medical IT Isolation power system
7.1 概述Overview
随着电子医疗设备在医院领域的广泛应用，漏电流对病人构成的威胁也越来越大，尤其是那些生命攸关的场所，病人在手术中或麻醉状态下，各种电极、传感器直接插入人体内，微小的漏电流都有可能导致病人触电身亡。另外有些医疗设备用于维持重症病人的生命，一旦设备停电，也会对病人的生命构成威胁。因此，对于医疗这一特殊场所的电气设计，应严格按照国家标准和规范进行。
安科瑞医用IT系统绝缘监测故障定位装置及系统适用于医院的手术室、ICU(CCU)监护病房等重要场所，能为这类场所提供安全、连续、可靠的供电解决方案。
With the wide application of electronic medical equipment in the field of hospitals, leakage current poses more and more threats to patients, especially in those places where life is crucial. During surgery or under anesthesia, a variety of electrodes and sensors are directly inserted into the body of patients, and tiny leakage current may lead to death by electrocution.In addition, some medical equipment is used to maintain the life of seriously ill patients, once the equipment power failure, it will also pose a threat to the lives of patients.Therefore, the electrical design of this special place for medical treatment should be carried out in strict accordance with national standards and norms.
Ankore medical IT system insulation monitoring fault location device and system are suitable for the hospital operating room, ICU(CCU) ward and other important places, can provide safe, continuous, reliable power supply solutions for such places.
7.2 医用隔离电源系统Medical isolation power system
医用隔离电源监控系统用于集中监控医疗大楼内所有医疗２类场所医疗IT系统的运行状况。这种集中监控系统可以设置在医院电气运行和维护人员的值班室内，也可以集成在其它电力监控系统中，由专业的电气人员进行监控，一旦某套IT系统出现故障，电气维护人员也能在一时间内做出判断，并根据现场情况进行处理。
The medical Isolated power monitoring system is used to centrally monitor the health of the medical IT system in all medical 2 locations in the medical building.The centralized monitoring system can be set up in the hospital electrical operation and maintenance personnel on duty room, also can be integrated in other power monitoring system, monitoring by professional electrical personnel, once a set of IT systems fail, electrical maintenance personnel can in time to make a judgment, and according to the site condition for processing.
系统拓扑图 System topology
7.3 软件功能Software functions
安科瑞医用隔离电源监控系统是基于触摸屏软件设计，软件具有远程测量、远程参数设置和远程自检等多种功能，为医院2类场所隔离电源系统的集中监控提供了强大的系统集成工具。软件的主要功能如下：
Acrel medical isolated power monitoring system is based on the touch screen software design, the software has a variety of functions such as remote measurement, remote parameter setting and remote self-inspection, which provides a powerful system integration tool for the centralized monitoring of the isolated power system in 2 types of hospitals.The main functions of the software are as follows:
■ 一次图和现场分布显示
Primary diagram and field distribution display
系统具有一次图及现场分布图显示功能，能直观的了解并及时地发现IT供电系统的报警地点或区域，从而方便专业人员及时到达现场进行故障排查；
The system has the function of one-time diagram and field distribution diagram display, can intuitively understand and timely find the alarm location or area of IT power supply system, so as to facilitate professionals to timely arrive at the scene for fault troubleshooting;
■ 实时数据采集与显示
Real-time data acquisition and display
利用安装于各隔离电源系统中绝缘监测仪表和绝缘故障定位仪表，采集各隔离电源系统的参数。采集到的数据实时显示在监控系统界面，这些监测参量含IT系统对地绝缘电阻、变压器负荷电流、变压器绕组温度及绝缘故障回路等；
The parameters of each isolated power system are collected by means of insulation monitoring instrument and insulation fault location instrument installed in each isolated power system.The collected data will be displayed on the interface of the monitoring system in real time. These monitoring parameters include insulation resistance of IT system to ground, transformer load current, transformer winding temperature and insulation fault circuit, etc.
■ 故障报警Fault alarm
将各医用隔离电源系统出现的各类故障，如绝缘故障、过载故障、超温故障以及接线断线故障等信息进行统一处理和记录，并可直接在显示界面上弹出显示故障类型、监测值、故障地点以及故障发生时间等信息。同时启动监控系统的声光报警系统，及时提醒相关人员，进行故障处理。其中，声音报警信号可被手动消除。
All kinds of faults in the medical isolated power system, such as insulation fault, overload fault, overtemperature fault and connection break fault, are uniformly processed and recorded, and information such as fault type, monitoring value, fault location and fault occurrence time can be displayed directly on the display interface.At the same time start the monitoring system sound and light alarm system, timely remind the relevant personnel, fault treatment.Among them, the sound alarm signal can be manually eliminated.
■ 远程参数设置和查询Remote parameter Settings and queries
通过系统，可根据要求远程调整和设置各医用隔离电源系统中绝缘监测仪的各类报警参数阈值，也可以任意查看这些报警参数值。参数包括绝缘报警值、负载电流报警值和隔离变压器温度报警值等。
Through the system, all kinds of alarm parameter thresholds of insulation monitors in medical isolated power supply systems can be adjusted and set remotely according to requirements, and these alarm parameter values can also be checked at will.The parameters include insulation alarm value, load current alarm value and isolation transformer temperature alarm value
■ 图形显示功能：Graphic display function:
系统可以以曲线的形式，显示各套隔离电源系统的绝缘状况、负载状况，以及隔离变压器的温升状况，以及它们的变化趋势，以便于分管理人员了解和分析各电源系统的运行变化情况，有针对性的对某些系统进行维护和保养。
7.4 安科瑞医用IT系统四件套选型 Acrel medical IT system four-piece set selection
医用IT系统绝缘监测产品（四件套）包括AITR-S系列医用隔离变压器、AIM-M10医疗智能绝缘监测仪、AKH-0.66P26电流互感器和AID系列（AID10、AID150）外接报警与显示仪等，产品如图5所示。
The system can be in the form of a curve, showing the insulation status of each set of isolated power supply system, load status, as well as the isolation transformer temperature rise status, as well as their change trend, in order to facilitate the sub-managers to understand and analyze the operating changes of each power supply system, targeted maintenance and maintenance of some systems.
Insulation monitoring products of medical IT system (a four-piece set) include AITR S series medical isolation transformer, AIM-M10 medical intelligent insulation monitor, abakh 0.66P26 current transformer and AID series (AID10, AID150) external alarm and display instrument, etc., as shown in Figure 5.
Table 1 Insulation monitoring products of medical IT system (four-piece set)
参考文献
[1]德国本德尔IT隔离电源系统产品资料.
[2]王厚余论IT系统的应用建筑电气，2008（11）：3-7.
[3]刘建军、IT隔离电源系统在深圳市第三人民医院的应用.
[4]安科瑞企业微电网设计与应用手册.2019.11版.
Bibliography
[1]Product information of IT isolated power supply system of Bender, Germany.
[2]Wang Houyu on Applied Building Electricity of IT System, 2008 (11) : 3-7.
[3]Application of Liu Jianjun and IT Isolated power Supply system in Shenzhen Third People's Hospital.
[4]Design and Application Manual of Ankore Enterprise Microgrid.2019.11 edition
