MRI scanning uses magnetism, radio waves, and a computer to produce images of body structures. MRI scanning is painless and does not involve x-ray radiation. Patients with heart pacemakers, metal implants, or metal chips or clips in or around the eyes cannot be scanned with MRI because of the effect of the magnet.
Electrical Switchgear Protection. Definition of Switchgear. A switchgear or electrical switchgear is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system. Assembly of such devices in a logical manner forms switchgear.
The main breaker to the switchgear may be tripping before the load breaker that supplyâs a motor trips. The most common reason for the incorrect circuit breaker coordination tripping sequence is because the relays are not set as designed for the switchgear. What is the definition of a short circuit and or relay coordination study? To define a short circuit and or relay coordination study in simple terms, coordination means that downstream devices (breakers) should trip before upstream breakers. This keeps the fault at or near the equipment that causes the inrush of current to occur.