Lightning: when the lightning strikes , Magnetic Resonance Imaging(MRI) is affected easily to stop working within being dangerous for patient and other equipment throughout the whole emergency .
Faulty arc :The mainly reason is faulty arc for fire accident and difficult to figure out during early fire . because the hidden fire point surround the medical equipment , power supply line , and power switch create faulty arc with high heating energy .
Harmonic and three phase unbalance :Electrical devices cause lots of harmonic to interfere operation of equipment including CT, MRI , and X-RAY. Those scans can be performed on every region of body for a variety of reasons (e,g, diagnostic , treatment ,planning , intervention , or screening ) by X-RAY source and a detector assembly with the system rotate around the patient .
when the harmonic occurs , electrical components in equipment make noise and change the output of data signal , so that the image of detecting will be distorted or unclear. These bad cross-sectional images are not reached for a variety of diagnostic and therapeutic purposes.
Multi -function ventilator , cardiac pacemaker , and ECG monitor, they are used to regulate the respiration and activity of the heart recorded, depending on the direction of petty electrical current in relation to the axis start-up.
The petty electrical easily distorted by tiny harmonic current ,even the patient is endanger for electrical attack, also electrical therapeutic instrument is very sensitive to harmonic interference cause of functions throughout microwave , audio , and short wave. Logging and monitoring of data are very important and non-stop working as for custodial data memorized, that disturbed by harmonic voltage.Elevator Indeed , some equipment seem to be more amenable to good service in hospital and more than lack of them in past.