You may have come across medical grade transformers when selecting a transformer for your project and wondered, “What is the difference between a medical grade transformer and a standard transformer”? Hopefully, this article of mine will clear some things up for you.
Transformers used in medical applications must meet the following requirements:
Medical isolation transformers are required to meet higher safety and reliability requirements than many conventional transformers for ensuring the safety of medical staff, patients, and medical equipment. These differences include the following:
- The safety and compliance standards are different. The medical isolation transformer safety and compliance standards higher national industry standards (iec61558-1-2) and international standards (UL 60601-1:1988)
- Lower leakage current
- The creepage distance and air gap are smaller
- Lower temperature rise
- Hi Pot standard (generally above 4000V)
- Insulation grade (generally grade B above 130 ℃)
- Bottom lead wire design
- Electrostatic shielding is required between primary and Second
- Built in recoverable thermal protector device etc.
Design of Isolation Medical Grade Transformers
1. Safety Ground：
In between the primary and secondary coils, a safety shield with insulation is placed,with insulation between the shield and each coil, maintains leakage current maximums. This ensures that the leakage current remains within prescribed limits. Safety standards are strictly adhered to with the thick safety shield. faulty electrical path is connected directly to ground in the event of a malfunction.
2. Double/Reinforced Insulation:
Between the primary and secondary sides, two or more insulation layers are packed.The rigorous safety standards must be met by each layer.The next layer takes over if one layer fails or breaks.When compared with shield type transformers, insulation type transformers have lower leakage current levels.
Schematic of Medical grade Isolation transformer
Functions of medical grade isolation transformers
- When the first insulation fault occurs at the load end of the power grid, the Isolation Medical Grade Transformers can prevent tripping, ensuring continuity of power supply
- When an insulation fault occurs for the first time, avoid losing power
- Protecting sensitive equipment from electrical noise
- Star points can be created for equipment in a grid that do not have them
- When the first insulation fault occurs at the load end of the power grid, the Isolation Medical Grade Transformers can prevent tripping, ensuring continuity of power supply
- When an insulation fault occurs for the first time, avoid losing power
- Protecting sensitive equipment from electrical noise
- Star points can be created for equipment in a grid that do not have them
- When the first insulation fault occurs at the load end of the power grid, the Isolation Medical Grade Transformers can prevent tripping, ensuring continuity of power supply
- When an insulation fault occurs for the first time, avoid losing power
- Protecting sensitive equipment from electrical noise
- Star points can be created for equipment in a grid that do not have them
- Generate warning if fault condition occurs in the supply side
- Isolation Medical Grade Transformers with isolation reduce earth leakage currents and so increase fire safety
7 Advantages of Isolation Medical Grade Transformers
- As Isolation Medical Grade Transformers is more reliable and safe, the time required to test the product can be reduced, resulting in a shorter time to market
- Designed devices can have low leakage currents
- Output voltage adjustable
- Lower output noise
- Strict adherence to internationally recognized safety standards
- Compact size, reduced weight, and low power losses
- Built-in thermal protection
Applications of of Isolation Medical Grade Transformers
Low cost, high efficiency, adjustable output voltage, low output noise, and fast dynamic response make medical isolation transformers an excellent choice for medical equipment.
It can be used in the following medical devices:
- Defibrillators
- MRI scanners
- Ventilators
- Dental equipment
- Pacemakers
- Intravenous drug-dosing pumps
- Glucose monitors
- ECG machines
- BP monitors
- CAT scan machines
- Anaesthesia machines
- Ultrasound machines
- Suction machines
- Oxygen pumps
- Lab equipment
- Ventricular assist devices
- Dialysis machines
- Patient monitoring systems
- Medical drip controllers
- Hospital beds
- EEG monitors
- Electro-surgical equipment
- Sterilizing equipment
- Medical grade linear power supplies etc.
What is the difference between a medical grade transformer and a standard transformer？
The principle of medical grade transformer is basically the same as that of standard transformer, and both operate using electromagnetic induction.Isolation transformers are normally called 1:1 transformers. As there is no connection between the secondary and ground, and no potential difference exists between any auxiliary wires and ground, it is safer to use. Although standard transformer also have isolation circuits between primary and secondary windings, electrostatic interference can still occur if the frequency is too high. The primary and secondary windings on the medical isolation transformer are distributed on different cores, reducing the capacitance between them to avoid electrostatic interference.
Where can you get the best Isolation Medical Grade Transformers？
If you are planning to purchase an medical grade transformers, the UNICREED could provide you with the best medical grade transformers. With years of experience manufacturing high quality and highly reliable transformers, UNICORED is one of the leading transformer manufacturers in China.The transformers that we manufacture are highly reliable, durable, and cost efficient. We manufacture highly reliable, durable, and cost-effective transformers www.unicreed-transformer.com, any question welcome email us sales@unicreed-transformer.com
