Hello folks,
There is a question about working voltage for the case that 2 MOPP is divided to 2 single MOPP (in former times: BI + SI). If working voltage of one concerned MOPP differ from the working voltage of the whole 2 MOPP, how to consider the working voltage for the latter MOPP?
For example: isolation barrier A between primary (240V) and secondary (48V) meets 1 MOPP @ 288V, barrier B from secondary to applied part in principle needs to fulfil 1 MOPP @ 288V. I think if primary to secondary does short, the voltage stressing the barrier B should be the mains voltage (240V), but not the summing voltage 288V.
Please kindly advise it.
Thanks and regards,
Roland
There is a question about working voltage for the case that 2 MOPP is divided to 2 single MOPP (in former times: BI + SI). If working voltage of one concerned MOPP differ from the working voltage of the whole 2 MOPP, how to consider the working voltage for the latter MOPP?
For example: isolation barrier A between primary (240V) and secondary (48V) meets 1 MOPP @ 288V, barrier B from secondary to applied part in principle needs to fulfil 1 MOPP @ 288V. I think if primary to secondary does short, the voltage stressing the barrier B should be the mains voltage (240V), but not the summing voltage 288V.
Please kindly advise it.
Thanks and regards,
Roland