It replicates, because both are based on IEC TC109 insulation
co-ordination standards.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-07-19 13:54, James Pawson (U3C) wrote:
Thanks all,
I’ve found some voltage isolation and earthing requirements in clause
7.2.4 and 13.4.9 of EN 50155 which makes sense. Framing it against
more familiar territory for me, it appears to replicate the basic
requirements of EN 62368-1 for 1.5kVac/2.1kVdc between AC mains @
230Vac and any low voltage secondary circuitry.
It all seems to make sense. As always thank you for the helpful responses.
All the best
James
James Pawson
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*From:*James Pawson (U3C) <[email protected]>
*Sent:* 19 July 2019 09:40
*To:* [email protected]
*Subject:* [PSES] Railway Earthing and Isolation Requirements -
Rolling Stock and Trackside Equipment
Hello experts,
I’m working with a company designing some equipment for both rolling
stock and trackside applications for rail applications.
Information about earthing schemes for this type of equipment seems to
be ill defined. The customer has been given the (vague) requirement
that they must achieve a 1.5kV isolation (presumably AC) from all
equipment to Protective Earth. I’m assuming that this is on the low
voltage side of a power supply but this too is unclear.
Does anyone have access to any relevant standards literature, app
notes, books, etc on Earthing requirements for rail applications? Any
pointers at all would be welcome. Some googling on may part isn’t
coming up with much useful. Maybe I haven’t found the correct search term?
Thanks in advance,
James
James Pawson
EMC Problem Solver
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Design for EMC / Pre Compliance / Problem Solving / EMC Testing /
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www.unit3compliance.co.uk <http://www.unit3compliance.co.uk/>-- 07811
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