Issue:
Why can't you add single pole breakers to medical isolation panels?
Product Line:
Medical Isolation Panels
Environment:
SIP, SID, SIX Medical Panels
Cause:
Application and Clarification
Resolution:
No. There is no neutral in medical Isolation panels. If you look at a typical secondary, there is only one coil. It is floating in a magnetic field, but nowhere connected to ground. The start is X2 and finish is X1. A load connected between X1 and X2 will experience current flow across those two, at 120V. Voltages from X1 or X2 to ground can read weird voltages, but only because they are reading floating voltages induced from electromagnetic energy circulating in the core. That "phantom" voltage could be 60V, or it could be other voltages, depending on many factors. Adding a 1 pole circuit breaker will only be fed by half of the 120Vs required for the 120V circuit.
Why can't you add single pole breakers to medical isolation panels?
Product Line:
Medical Isolation Panels
Environment:
SIP, SID, SIX Medical Panels
Cause:
Application and Clarification
Resolution:
No. There is no neutral in medical Isolation panels. If you look at a typical secondary, there is only one coil. It is floating in a magnetic field, but nowhere connected to ground. The start is X2 and finish is X1. A load connected between X1 and X2 will experience current flow across those two, at 120V. Voltages from X1 or X2 to ground can read weird voltages, but only because they are reading floating voltages induced from electromagnetic energy circulating in the core. That "phantom" voltage could be 60V, or it could be other voltages, depending on many factors. Adding a 1 pole circuit breaker will only be fed by half of the 120Vs required for the 120V circuit.
Released for:Schneider Electric USA
