Energy Guide

Page 44 of 104 Report No.: HK2107050725-SR
UL 507
Clause Requirement + Test Result - Remark Verdict
TRF No. UL507A
31.1.1 A secondary circuit shall comply with the
requirements for one of the following types of
secondary circuits:
a)A Class 2 circuit;
b)A limited voltage/current circuit;
c)A limited energy circuit;
d)A limiting impedance circuit; or
e)The requirements for electronic circuits in
Supplement SB.
N/A
31.1.2 An optical isolator that is relied upon to provide
isolation between primary and secondary circuits
or between other circuits as required by this
Standard shall be constructed in accordance with
the Standard for optial Isota to rs, UL 1577 and
shall be able to wih stand for minute ,without break
down, an ac dielectric voltage withstand potential
equal to 1000 V plus twice rated voltage between
the input and output circuits.
N/A
31.1.3 A power switching semiconductor device that is
relied upon to provide isolation to ground shall be
constructed in accordance with the Standard for
Electrically Isolated Semiconductor Devices, UL
1557. The dielectric voltage withstand tests
required by UL 1557 shall be conducted at a
dielectric potential of 1000 V plus twice rated
voltage for 1 minute.
N/A
31.2 Difference between the level of evaluation required
within each type of secondary circuit
N/A