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

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

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 <jmw1...@btinternet.com>; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Inrush Current I think it also depends on what your EUT is.

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

Re: [PSES] Inrush Current

2017-08-10 Thread John Woodgate
odgate and Associates Rayleigh England Sylvae in aeternum manent. From: Kim Boll Jensen [mailto:k...@bolls.dk] Sent: 10 August 2017 12:30 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Inrush Current Hi We have several times been asked to test Inrush Current and have this function on our Ha

[PSES] Inrush Current

2017-08-10 Thread Kim Boll Jensen
Hi We have several times been asked to test Inrush Current and have this function on our Harmonic tester, but it is not defined how it measure and we get very different measurements each time we switch ON the same EUT. I can't find an IEC definition on the measurement other than "peak