Energy Guide

Page 83 of 104 Report No.: HK2107050725-SR
UL 507
Clause Requirement + Test Result - Remark Verdict
TRF No. UL507A
67.1.1 In addition to the end-product Temperature Test
and Dielectric Voltage-Withstand Test, a general
purpose transformer shall also be subjected to the
tests of 67.2 – 67.4.
N/A
67.2 Voltage measurement test P
67.2.1 For purposes of comparison with voltages
measured as described in the Overload Test of
67.3, each secondary open-circuit voltage shall be
measured with the primary connected to a test
voltage and frequency supply source as indicated
in Input Test, Section 45.
P
67.3 Overload test N/A
67.3.1 A transformer shall be subjected to the test
conditions described in 67.3.2. The stabilized
surface or core temperature recorded on the
transformer during the second 50 percent load
operation shall not be more than 5°C (9°F) greater
than the stabilized core temperature obtained
during the initial 50-percent of load operation. The
open-circuit output voltage determined following
the final 50 percent load operation shall be within 2
percent of the output voltage measured during the
Voltage Measurement Test in 67.2. As an option, a
protective device, if provided, may be bypassed
when conducting this test.
N/A