From: jeff collins
Sent: Friday, July 13, 2007 5:00 PM
Can anyone recommend a Transformer manufacturer that makes
custom medical grade transformers?
Speaking of on-line databases, try searching on UL's category named
Transformers, Construction Only - Component (XORU2). Add a keyword for
List Members,
Can anyone recommend a Transformer manufacturer that makes custom medical
grade transformers?
We will obviously need to get this component Approved/Listed/Certified and
want to work with a vendor that is established and reputable in handling
agency listings and manufacturing
Hi Ged:
In transformers with REINFORCED INSULATION or DOUBLE INSULATION the
insulation between 1ary and 2ary windings shalll consist of -
- 1 insulation layer having thickness at least 1mm, or
- at least 2 insulation layers with total thickness not less than 0.3mm, or
- 3
Regarding my query on medical equipment transformer construction
(EN-60601-1, clause 57.9.4(e)), can I be a bit more specific.
- How were insulation thickness requirements decided, and why is the
thickness requirement lower if insulation is 2-layer rather than
single-layer ?.
- Why are
Hi,
From Appendix A, General Guidance and Rationale, for Clause 57.9
...For reasons of PATIENT safety additional requirements must be applied to
the construction
of such transformers, e.g. restriction of LEAKAGE CURRENTS flowing to
PATIENT CIRCUITS.
57.9.4 e) In transformers with REINFORCED
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