Re: [PSES] Inrush Current

2017-08-10 Thread Peter Tarver
Customers sometimes want both the highest peak current and an rms over a defined number of line cycles. If the request is exclusively standards based, John's suggestion works well. You'll need to perform five to ten tests randomly closing on the supply cycle and pick the highest values. If an r

Re: [PSES] Inrush Current

2017-08-10 Thread John Woodgate
Sylvae in aeternum manent. -Original Message- From: Ralph McDiarmid [mailto:ralph.mcdiar...@schneider-electric.com] Sent: 10 August 2017 17:13 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Inrush Current Just curious to why delete the highest and lowest values before taking the

Re: [PSES] Inrush Current

2017-08-10 Thread Ralph McDiarmid
Subject: Re: [PSES] Inrush Current Look at Annex B of IEC/EN 61000-3-3. I did a lot of work on this for that Annex and you will often get different results each time, because of differences in how the current is interrupted at the previous switch-off. You do not select a point on the voltage waveform

Re: [PSES] Inrush Current

2017-08-10 Thread John Woodgate
ciates Rayleigh England Sylvae in aeternum manent. From: Nyffenegger, Dave [mailto:dave.nyffeneg...@bhemail.com] Sent: 10 August 2017 13:15 To: John Woodgate ; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Inrush Current I think it also depends on what your EUT is. Machinery will typically be f

Re: [PSES] Inrush Current

2017-08-10 Thread Nyffenegger, Dave
@LISTSERV.IEEE.ORG Subject: Re: [PSES] Inrush Current Look at Annex B of IEC/EN 61000-3-3. I did a lot of work on this for that Annex and you will often get different results each time, because of differences in how the current is interrupted at the previous switch-off. You do not select a point on the

Re: [PSES] Inrush Current

2017-08-10 Thread John Woodgate
Look at Annex B of IEC/EN 61000-3-3. I did a lot of work on this for that Annex and you will often get different results each time, because of differences in how the current is interrupted at the previous switch-off. You do not select a point on the voltage waveform for the switching instant; you c