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Medical Electrical Insulation Safety Meters Devices

● Insulation monitoring for medical IT systems
● Load and temperature monitoring of isolation transformer
● Device disconnection monitoring
● LED indicators: On, Insulation, Overload, Overtemp
● Alarm relay output
● Test button
●  Insulation fault location
● RS485 (MODBUS-RTU) + CAN
 
CE IEC
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Medical Electrical Insulation Safety Meters 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.



Function description of Medical Electrical Insulation Safety Meters Devices

1 Function features of AITR series medical isolation transformer

  • The transformation ratio between the primary and secondary windings is 1:1;

  • Double insulation treatment is adopted between the windings, and the electrostatic shielding layer is designed.

  • The PT100 temperature sensor is installed in each wire packet to monitor the temperature of the isolation transformer;

  • Used for the transformation of TN system into IT system (ungrounded system) after isolation transformer.


2 Function features of AIM-M200

  • Functions of real-time monitoring and fault alarming of the ground insulation resistance, transformer load current and transformer winding temperature of the monitored IT system;

  • Can be used with insulation fault locator, remotely starting fault-locating and displaying locating results when there are insulation faults;

  • Real-time monitor the line disconnection fault, temperature sensor disconnection fault and the functional grounding line disconnection fault of the monitored system, and give the alarm indication within 2S after the fault occurs. when the fault occurs;

  • Relay alarm output, LED alarm indication and other faults indication functions;

  • Two kinds of fieldbus communication technology, which are used for centralized alarm and display instrument, test signal generator, insulation fault locator and upper computer management software communications, and can monitor the operation status of IT system in real time.

  • Events logging function, which can record alarm occurrence time and fault type and is convenient for operation personnel to analyze the operation conditions of system and promptly eliminate the faults;


3 ASG150 test signal generator

  • The CAN bus technology is used to exchange data with other equipment.

  • When the monitored IT system has an insulation fault, it can initiate and generate the fault location signal to the system, and realize fault locating function with the help of fault locator;

  • Functions of L1, L2 disconnection detection, and can display the results through the luminous LED.


4 AIL150-4/AIL150-8 insulation fault locator

  • The CAN bus technology is used to exchange data with other equipment.

  • Cooperate with ASG150 test signal generator to realize fault locating function, in which the AIL150-4 can locate the insulation faults of 4 circuits and AIL150-8 can locate the insulation faults of 8 circuits. The positioned circuit is indicated by the LED indicator.


5 Function features of AID150 centralized alarm and display instrument

  • Remotely monitor the real-time operation conditions of up to 16 pieces of systems, and the main interface intuitively displays whether the access system communication is intact;

  • The insulation resistance alarm value, load current alarm value and transformer temperature alarm value of each system insulation monitoring instrument can be set up remotely, and the insulation monitor self-test can be activated remotely.

  • When there are insulation faults, overload, excessive temperature rise of the voltage transformer or wiring faults in any of the monitored system, centralized alarm and display instrument can provide corresponding sound and light alarm function, and can manually eliminate the alarm sound.

  • Events logging function, which is convenient for operation personnel to analyze the operation conditions of system and promptly eliminate the faults, and can save maximum of 20 newest records;


6 Function features of HDR-60-24 power supply instrument

  • AC 220V input, DC 24V output, with max output power of 60W;

  • Used for the DC 24V power supply for AIM-M200 medical intelligent insulation monitoring instrument, ASG150 test signal generator, AIL150 series insulation fault locator, AID150 centralized alarm and display instrument and other instruments.


7 Function features of AKH-0.66P26 current transformer

  • The maximum measurable current is 60A, and the transformation change ratio is 2000:1;

  • Work with the AIM-M200 insulation monitoring instrument to measure the load current of isolation transformer.




Dimension drawings of Medical Electrical Insulation Safety Meters Devices

External dimensions of AITR series medical isolation transformer (unit: mm)


External dimensions of AIM-M200 medical intelligent insulation monitoring instrument (unit: mm)

    

Front view                                           Side view


External dimensions of ASG150 test signal generator (unit: mm)

    

Front view                                           Side view


External dimensions of AIL150-4/AIL150-8 insulation fault locator (unit: mm)

   

Front view                                           Side view

Note: AIL150-4 and AIL150-8 these two types take the same product shell, so their external dimensions are exactly the same.


External dimensions of AID150 centralized alarm and display instrument (unit: mm)


External dimensions of HDR-60-24 power module (unit: mm)

      

Front view                                           Side view


External dimensions of AKH-0.66P26 current transformer (unit: mm)

    

Front view                                                  Bottom view




Typical connection of Medical Electrical Insulation Safety Meters Devices



Technical parameter of Medical Electrical Insulation Safety Meters Devices

Technical Parameters of AITR Series of Medical Isolation Transformer

Type

AITR10000

AITR8000

AITR6300

AITR5000

AITR3150

Insulation class

H

H

H

H

H

Protection class

IP00

IP00

IP00

IP00

IP00

Power /Voltage /Current

Rated power

10000VA

8000VA

6300VA

5000VA

3150VA

Rated frequency

50-60Hz

50-60Hz

50-60Hz

50-60Hz

50-60Hz

Rated input voltage

AC230V

AC230V

AC230V

AC230V

AC230V

Rated input current

45.3A

36A

28.5A

22.5

14.2A

Rated output voltage

AC230V/115V

AC230V/115V

AC230V/115V

AC230V/115V

AC230V/115V

Rated output current

43.5A

34.7A

27.4A

21.7

13.7A

Inrush current

<12In

<12In

<12In

<12In

<12In

Leakage current

<200μA

<200μA

<200μA

<200μA

<200μA

No load input current

1.359A

1.08A

0.855A

0.675A

0.426A

No load output voltage

235V±3%

235V±3%

235V±3%

235V±3%

235V±3%

Short circuit voltage

<6.9V

<6.9V

<6.9V

<6.9V

<7.5V

General parameters

Fuse wire

80A

63A

50A

35A

25A

Primary winding resistance

<55mΩ

<64mΩ

<80mΩ

<131 mΩ

<245mΩ

Secondary winding resistance

<45mΩ

<64mΩ

<80mΩ

<116 mΩ

<228mΩ

Iron loss

<150W

<105W

<107W

<77W

<55W

Copper loss

<230W

<200W

<170W

<125W

<120W

Efficiency

>96%

>96%

>96%

>96%

>95%

Maximum ambient temperature

<40℃

<40℃

<40℃

<40℃

<40℃

No-load temperature rise

<36℃

<33℃

<31℃

<26℃

<22℃

Full load temperature rise

<65℃

<76℃

<67℃

<62℃

<55℃

Noise grade

<40dB

<40dB

<40dB

<40dB

<40dB


Technical Parameters of AIM-M200 Medical Intelligent Insulation Monitoring

AUX Power

Voltage

DC 18…36V

Temperature monitoring

Thermal resistor

 2 Pt100

Power consumption

≤3W


Measuring range

-50…+200℃

Insulation monitoring

Resistance measuring range

15…999kΩ


Alarm value range

0…+200℃

Response value

50…999kΩ

Alarm

output

Output mode

2 Relays

Relative uncertainty

±10%,±10K


Contact rating

AC 250V/3A

DC 30V/3A

Response time

≤3s

Environment

Operating temperature

-10…+55℃

Permissible system leakage capacitance Ce

≤5uF


Transport temperature

-25…+70℃

Measuring voltage Um

≤12V


Storage temperature

-25…+70℃

Measuring current Im

50uA


Relative humidity

5%-95%No condensation

Impedance Zi

≥200kΩ


Altitude

≤2500m

Internal DC resistance Ri

≥240

IP degree

IP30

Permissible extraneous DC voltage Ufg

≤DC280V

Rated impulse voltage / pollution degree

4KV/Ⅲ

Load current monitoring

Measuring Value

2.1…50A

EMC/EMR

IEC 61326-2-4

Alarm Value

5…50A

Communication protocol

CANcustomize

Measuring accuracy

±5%


RS485Modbus-RTU


Technical Parameters of ASG150, AIL150-4/AIL150-8 Test Signal Generator

Item

Technical parameters


ASG150

AIL150-4/AIL150-8

Auxiliary power supply

Voltage

DC 24V

DC 18…36V

Maximum power consumption

≤2VA

Monitored system

Rated voltage

0…242 VAC

Rated frequency

45… 60Hz

Locating current

<1mA r.m.s.

Fault locating

Maximum circuit

Four circuits, eight circuits

Response time

   ≤5s

Communication

Mode

CAN communication

Protocol

Self-defined protocol


Technical Parameters of AID150 Centralized Alarm and Display Instrument

                  Type

Parameters

AID150

AUX POWER

Voltage

DC 24V

Power consumption

0.6W

Insulation Resistance Display Range

0…999kΩ

Insulation alarm range

50…999kΩ

Transformer Output Current Display

Percentage

Current alarm range

14A18A22A28A35A45A

Temperature alarm range

0…+200℃

Alarm mode

Sound and light alarm

Alarm type

Insulation fault, overload, and over temperature

Communication mode

RS485,MODBUS-RTU

Display mode

LCD liquid crystal display128*64 dot array


Technical Parameters of HDR-60-24 Power Supply Device

Type

Input

Output

Installation method

HDR-60-24

100-240VAC 1.8A

24VDC  2.5A

35mm track installation


Technical Parameters of AKH-0.66P26 Current Transformer

Input current

0.05A50A


Frequency range

0.02-10 kHZ

Output current

0.02525 mA


Loading resistance

<200Ω

Temperature coefficient

100 ppm/℃


Transient current (1s)

200A

Phase displacement

10¢


Installation

Fixed with 4×10 screws

Operating temperature

-35+70℃


Secondary wiring

Single core >0.75mm2, Maximum length of 1 meter

Storage temperature

-40+75℃



Single core twisted pair, 0.75mm2, Maximum length of 10 meters

Secondary resistance range

95120Ω


Isolation pressure

5000Vac

Accuracy

0.5%


Linearity

0.5%


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