Medical Isolation Power Supply System
Application
Medical IT electrical system definition
Solution for PV DC coupled energy storage
The first letter indicates the status of the neutral point and ground of the power supply:
T - indicates that the neutral wire of the power supply is directly grounded;
I - indicates that the neutral wire of the power supply is not grounded or grounded with high impedance;
The second letter indicates the state of the load side and ground;
T - The leaking conductive part of the electrical device is directly grounded, and the grounding point is independent of the grounding point of the power supply terminal;
N - The exposed conductive part of the electrical device is directly electrically connected to the grounding point of the power supply terminal;
The third letter C indicates that the neutral line (N line) is shared with the protective zero line (PE line); the fourth letter S indicates that the neutral line (N line) is separated from the PE line
Why need the IT system for hospital?
TN-S system:poor power supply safety and continuity
1. In the grounding system, when a live wire grounding fault occurs, the neutral wire is short circuited to ground, the circuit breaker trips, and the continuity of power supply is affected.
2. Any electrical equipment powered by the TN system will generate a certain amount of leakage, which poses a threat to medical personnel and patients.
3. If the leakage current of the equipment exceeds the operating current of the leakage current protection circuit breaker, the circuit breaker will trip, which also affects the continuity of power supply.
IT system:good power supply safety and continuity
1. The IT system is not grounded. When any live wire is grounded (the first grounding fault), the insulation monitoring device reports a grounding fault, but the circuit breaker will not trip, and the system can continue to operate with the fault.
2. Due to the system not being grounded, leakage current forms a loop through the distributed capacitance of the system. Under high capacitance impedance, the leakage current will be relatively small, and the normal system leakage current is below microamperes.
3. For medical IT systems, IEC standards require that the input and output circuit breakers of the IT system must not have overload protection function and must not be powered off when overloaded.
Structure
Product Selection
Product name |
Product image | Functions |
AITR medical isolation transformer |
|
Isolating transformers for medical IT systems Double insulation treatment, Electrostatic shielding layer PT100 temperature sensor Rated power: 3.15-10kVA |
| AIM-M300 medical isolation monitor | 
|
Auxiliary Power Supply: DC 18~36V Resistance Measuring Range: 15~999kΩ Response Time: ≤3s Thermal Resistor: 2 Pt100 |
| AID150 medical isolation monitoring alarm and display device | 
|
Auxiliary Power Supply: DC 24V Number of IT Systems Monitored: 16 Insulation Resistance Alarm Setting: 10~999kΩ Alarm Mode: Sound-light alarm Communication: RS485, Modbus-RTU |
| ASG150 medical isolation signal generator | 
|
Auxiliary Power Supply: DC 24V Rated Voltage: AC 0~242V Rated Frequency: 45~60Hz Communication: CAN |
| AKH-0.66P26 current transformer | 
|
The maximum measurable current is 6, Current ratio 2000:1 Work with the AIM-M300 series insulation monitoring device to measure the load current of the isolation transformer |
| ACLP10-24 medical DC power supply | 
|
Power Supply to AID series AC 220V input, DC 24V output Completely Isolated Linear Transformer Power-on indicator |
Photo on Site
