Medical Isolation Transformers
Protect every heartbeat — choose compliant, expertly engineered medical transformer.
Medical isolation transformers also known as hospital transformers, safeguard patients and equipment by delivering galvanic isolation that is clean, stable and have low leakage current. Built to meet the strict IEC/SANS 61558-2-15 standards, they eliminate shock risks and interference in critical care areas.
Keeping lives safe where safety is non-negotiable.
Related Standards
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SANS 61558-1 ~ General safety requirements for power transformers
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SANS 61558-2-15 ~ Particular requirements for medical isolation transformers
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SANS 10142-1-2 ~ Wiring of premises — Medical locations
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IEC 60364-7-710 ~ Requirements for electrical installations in medical locations
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SANS 60601-1 ~ Medical electrical equipment — Basic safety and essential performance
Aspect | Compulsory Requirement | Spec | RT-Complies |
|---|---|---|---|
Special requirements
| Particular requirements for isolation transformers for the supply of medical locations. | IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Monitoring | Secondary circuit typically includes an Insulation Monitoring Device (IMD) to detect any loss of isolation. | IEC 60364-7-710 / SANS 10142-1-2 | Yes |
Earthing Arrangement | forms part of a medical IT system with insulation monitoring. | IEC 60364-7-710 / SANS 10142-1-2 | Yes |
Leakage Current Limit
| Extremely low — ≤ 0.5 mA under normal operation (critical for patient safety). | IEC 61558-2-15 / SANS 61558-2-15; IEC 60601-1 / SANS 60601-1 | Yes |
Electrostatic Shield (Screen)
| The screen is earthed. | IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Dielectric Strength
| Typically 4–5 kV AC | IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Insulation System | Must provide double or reinforced insulation per safety requirements.
| IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Isolation Type | Galvanic isolation | IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Energy Transfer Method | Electromagnetic induction | IEC 61558-1 / SANS 61558-1 | Yes |
Connection
| No direct conductive connection between the two windings. | IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Purpose | To electrically separate (isolate) the medical circuit from the mains to protect patients and operators from electric shock. | IEC 61558-2-15 / SANS 61558-2-15 | Yes |
Principle | Power is transferred magnetically through the transformer’s core | IEC 61558-1 / SANS 61558-1 | Yes |
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