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IT power distribution system insulation monitoring device and medical site power supply solution
source:管理员 time:2018-10-17

  1 Overview

  With the wide application of electronic medical equipment in the hospital field, leakage current poses a greater threat to patients, especially in places where life is critical. Patients are directly inserted into various electrodes and sensors during surgery or anesthesia. In the human body, tiny leakage currents may cause the patient to be electrocuted. Therefore, the electrical design of a special place in a hospital should be carried out in strict accordance with national standards and norms.

  Ankerui Medical IT System Insulation Monitoring Device and System is suitable for hospitals' operating rooms, ICU (CCU) intensive care units and other important places, and can provide safe, continuous and reliable power supply solutions for such places.

  2 medical isolated power monitor

  2.1 Applicable environment

  ◆ Working temperature: -10 °C ~ +55 °C

  ◆ Storage temperature: -20 ° C ~ +70 ° C

  ◆ Relative humidity: ≤95% without condensation

  ◆ Altitude: ≤2500m

  ◆ Pollution degree: Class III, installation category: Level III

  2.2 Main components

  The main functions and components of the Ankerui medical isolated power monitor cabinet are shown in the table below.


  2.3 Physical structure diagram



  1: Alarm indicator (red), the indicator lights when the system receives the monitoring alarm signal.

  2: Communication fault indicator (yellow), the indicator light is on when the system communication is abnormal.

  3: Running indicator (green), the indicator lights when the system is running normally.

  2.4 Software Interface




  The medical isolated power monitor cabinet can perform centralized and real-time monitoring and display of the operating status of the IT system installed in each ICU ward and intensive care unit. The monitoring parameters include the grounding resistance of the IT system, the transformer load current, and the transformer winding temperature. And insulation fault circuit; the system has a map and on-site distribution map display function, which is convenient for timely and intuitive discovery of the alarm location or area of the IT power supply system;




   The display of the medical isolated power monitor cabinet is a touch display mode. The system can separately call the monitoring screen of an IT power supply system, and can manually select the IT power supply system to query the detailed status of its transformer operation. It has a disconnection fault detection function, such as a disconnection fault with the system under test, and a temperature sensor. Functions such as disconnection failure and functional grounding wire breakage;


   The medical isolated power monitor cabinet has alarm display and recording function, which can record the time when the alarm occurred, the type of alarm and the alarm value, and can support the alarm sound (the alarm sound can also be shielded), which is convenient for the operation and maintenance personnel to analyze the history of the system operation. Situation, timely troubleshooting.

  3 Power supply solutions for medical sites

  3.1 ICU, CCU ward power distribution solution (take GGF-I8G isolated power distribution cabinet system diagram as an example)



   Solution 1 Without insulation fault location function


   Scheme 2 with insulation fault location function

  Plan configuration table


  3.2 Operating room power distribution solution (take GGF-O8G isolated power distribution cabinet system diagram as an example)




   Solution 1 Without insulation fault location function


  Scheme 2 with insulation fault location function

  Plan configuration table



  3.3 medical isolation power cabinet

  The medical isolation power supply cabinet is a power distribution cabinet with local IT system designed for the power supply requirements of medical class 2. The IT system is equipped with an insulation monitoring device to monitor the insulation status of the system. Each output circuit uses an open circuit with short circuit protection. The TN-S system output circuit uses a circuit breaker with leakage protection. Products are divided into GGF-O series operating room isolated power supply cabinets, GGF-I series ICU/CCU and other ward isolated power supply cabinets according to different places of use, and isolation transformers are externally installed, embedded in wall installation, used for operating room power distribution. GRF-O and GRF-I isolated power cabinets for ICU/CCU and other wards, these products can meet the power safety and reliability requirements of various operating rooms and intensive care units, and meet GB16895 .24-2005/IEC60364-7-710:2002 "Electrical Installations for Buildings, Part 7-710: Requirements for Special Installations or Sites - Medical Locations" and GB7251.1-2005/IEC 60439-1:1999 "Low-Voltage Switch Equipment and control equipment, etc.



 
   3.3.1 Technical parameters
 

  Note: GGF-IXF and GGF-OXF isolated power supply cabinets are externally mounted, split-type power distribution cabinets.

  3.3.2 Product naming rules


  3.3.3 Order Information


  3.3.4 Product Dimensions (Unit: mm)


 


 

  4 product introduction

  4.1 AITR series isolation transformer

  The AITR series of isolation transformers are specially designed for medical IT systems. The core of the product is made up of silicon steel sheets imported from Japan, and the loss is small. A double insulation treatment is applied between the winding and the winding, and an electrostatic shielding screen is designed to minimize electromagnetic interference between the two windings. A PT100 temperature sensor is installed in the winding to monitor the winding temperature. The transformer is vacuum-injurted as a whole, which increases mechanical strength and has corrosion resistance. In addition, the product uses a low temperature rise and low noise design, which makes it have good temperature rise performance and low noise.


  4.1.2 Compliance with standards

  ◆ GB19212.1-2008/IEC 61558-1:2005 "Safety of power transformers, power supplies, reactors and similar products - Part 1: General requirements and tests";

  GB1912.16-2005/IEC 61558-2-15:1999 "Safety of power transformers, power supply units and similar products - Part 16: Particular requirements for isolation transformers for power supply in medical facilities";

  ◆ GB16895.24-2005/IEC60364-7-710:2002 "Building Electrical Installations Part 7-710: Requirements for Special Installations or Locations - Medical Locations".

  4.1.3 Performance parameters


  4.1.4 Dimensions

  4.2 AIM-M100 insulation monitor


   AIM-M series insulation monitor is a high-performance insulation monitoring device, which is used in medical IT system to monitor the insulation state of IT system to the ground. When the system has insulation failure, it can send out alarm signal in time to remind work. The personnel are handled according to the actual situation. The product has a rich display and alarm indication function, friendly interface and convenient operation.

  4.2.1 Product Features

  ◆ It has the functions of real-time monitoring and fault alarm on the grounding insulation resistance, transformer load current and transformer winding temperature of the monitored IT system;

  ◆ It can monitor the disconnection fault of the connected system, the disconnection fault of the temperature sensor and the disconnection of the functional grounding wire in real time, and give an alarm indication when the fault occurs;

  ◆ Multiple alarm indication functions such as relay alarm output and LED alarm indication;

  ◆ Adopt advanced fieldbus communication technology to communicate with external alarm and display instrument and PC management software to monitor the operation status of IT system in real time;

  ◆ With event recording function, it can record the time and type of fault occurrence of the alarm, which is convenient for the operator to analyze the running status of the system and eliminate the fault in time.

  4.2.2 Compliance with standards

  ◆ GB16895.24-2005/IEC60364-7-710:2002 "Electrical installations of buildings - Part 7-710: Requirements for special installations or places - Medical establishments";

  ◆ IEC 61557-8-2007 "Testing, measuring or monitoring equipment for electrical safety protection testing of low-voltage distribution systems of 1000 V and DC 1500 V. Part 8: Insulation monitoring devices for IT systems".

  4.2.3 Technical parameters


  4.2.4 Outline and installation dimensions (unit: mm)


  4.3 AID Series Alarm and Display


  The AID Series Alarm and Display is a remote display and audible and visual alarm device using advanced fieldbus communication technology. It can display the current insulation resistance, transformer load rate and other monitoring data of AIM-M series medical intelligent insulation monitor in real time, and give an audible and visual alarm signal when the system fails. The alarm threshold of the AIM-M series medical intelligent insulation monitor can also be set remotely through the AID series alarm and display. The AID series alarm and display models are available in three models: AID100, AID120 and AID200 depending on the installation method and display mode. The device can be installed in the operating room or on the information control panel in the intensive care unit to help the medical staff understand the operational status of the isolated power system and the type of failure in the event of a system failure.

  4.3.1 Product Features

  ◆ Real-time display of monitoring results of the insulation monitor;

  ◆ Remotely set the alarm parameters of the insulation monitor;

  ◆ Using fieldbus communication technology, the monitoring data and alarm information of the insulation monitor can be obtained in real time;

  ◆ Sound and light alarm can be issued when the fault occurs. When the silence button is pressed, the sound is turned off and the corresponding fault indicator will not go out until the fault is cleared.

  4.3.2 Compliance with standards

  ◆ GB16895.24-2005/IEC60364-7-710:2002 "Electrical installations of buildings" Sections 7-710: Requirements for medical facilities for special installations or locations.

  4.3.3 Technical parameters



  4.3.4 Dimensions





  4.4 DC regulated power supply

  4.4.1 ACLP10-24 DC Power Supply

  Instrument-specific DC voltage regulator module with fully isolated linear transformer. It has the characteristics of stable output voltage, small ripple and high withstand voltage, and it has power supply indication function. The module adopts the standard rail installation method, and can be installed on the same rail as the insulation monitor, which is convenient to install.

  4.4.1.1 Compliance with standards

  ◆ GB19212.1-2008/IEC 61558-1:2005 "Safety of power transformers, power supplies, reactors and similar products - Part 1: General requirements and tests";

  ◆ GB19212.16-2005/IEC 61558-2-15:1999 Safety of power transformers, power supply units and similar products Part 16: Particular requirements for isolating transformers for power supply in medical applications.

  4.4.1.2 Technical parameters



  4.4.1.3 Outline and installation dimensions (unit: mm)



  4.4.2 DR-60-24 DC Power Supply

  The DR-60-24 DC regulated power supply can provide DC 24V power for AIM-M200 medical intelligent insulation monitor, ASG100 test signal generator, AIL100 series insulation fault locator and AID200 centralized alarm and display instrument. The power supply has large power, stable voltage output and convenient installation, and can meet the power supply requirements of the above instruments, and is a recommended power supply product.

  4.4.2.1 Selection recommendation

  Model input and output installation method manufacturers

  DR-60-24100-240VAC 1.8A24VDC 2.5A35mm rail mounting Taiwan Ming Wei

  4.4.2.2 Product shape and installation dimensions (unit: mm)

  4.5 ASG100 Test Signal Generator

  The ASG100 test signal generator uses a 32-bit microprocessor chip and a high-precision signal generation circuit to generate a specific test signal. When the monitored IT system has an insulation fault, it can start and generate test signals in time, and cooperate with the insulation fault locator to achieve insulation fault location.

  4.5.1 Compliance with standards

  ◆ IEC 61557-9-2007 "Testing, measuring or monitoring equipment for electrical safety protection testing of low-voltage distribution systems of 1000 V and DC 1500 V. Part 9: Insulation fault locating devices for IT systems".

  4.5.2 Technical parameters

  4.5.3 Outline and installation dimensions (unit: mm)

  4.6 AIL100 Series Insulation Fault Locator



  The AIL100-4/AIL100-8 insulation fault locator uses a high-sensitivity transformer with a high-precision signal detection circuit to detect the signal injected into the system by the ASG100 test signal generator and accurately locate the loop where the insulation fault is located. The AIL100-4 insulation fault locator can locate the insulation faults of the four circuits, and the AIL100-8 insulation fault locator can locate the insulation faults of the eight circuits.

  4.6.1 Compliance with standards

  ◆ IEC 61557-9-2007 "Testing, measuring or monitoring equipment for electrical safety protection testing of low-voltage distribution systems of 1000 V and DC 1500 V. Part 9: Insulation fault locating devices for IT systems".

  4.6.2 Technical parameters

  4.6.3 Outline and installation dimensions (unit: mm)

  4.7 Protective Current Transformer



  AKH-0.66P26 current transformer is a protection type current transformer used with AIM-M100 insulation monitor. The maximum measurable current is 50A, the transformation ratio is 2000:1, and the current transformer is directly fixed by screws. Inside the cabinet, the secondary side is led out through the terminal, which is convenient to install and use.

  4.7.1 Technical parameters


  4.7.2 Dimensional drawing (unit: mm)

  5 Qualification certificate

  6 application plan

  6.1 Operating room isolated power supply design

  6.2 ICU/CCU isolated power supply design

  6.3 Medical isolation power system wiring diagram


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