Test Report

Report Reference No.: 50337286 001
UL 1012
Clause
Requirement – Test
Result – Remark
Verdict
Page 34 of 75
26.1.2
A thermal cutoff or other device employed to reduce the risk of
fire or electric shock due to overheating of a transformer during
abnormal operation shall comply with the requirements
applicable to such a device in addition to the applicable
requirements in this standard. For example, a thermal cutoff
shall comply with the applicable requirements in this standard
and those in the Standard for Thermal-Links - Requirements
and Application Guide, UL 60691.
N/A
26.1.3
A transformer shall be of the isolating type and comply
with 26.1.4 when it supplies:
Isolating Type
P
a) LVLE circuits which exit the enclosure; or
N/A
b) Accessible signal circuits as described in Section 37,
Accessible Signal Circuits.
No accessible signal
circuits.
N/A
The acceptability of an insulation system in a transformer used
to supply circuits other than noted in (a) or (b) is to be
determined by the applicable abnormal tests specified
in 54.1, 54.2, 54.7, and 54.10.
Transformer complies
P
26.1.4
A transformer used where isolation is required, in accordance
with 26.1.3, shall have its windings electrically isolated from
separate windings and shall be constructed as specified
in 26.2.1 - 26.2.4 so that there is no electrical connection -
under normal and overload conditions - between the primary
and secondary windings, between the primary winding and the
core, or between separate adjacent secondary windings, when
such connection results in a risk of fire or electric shock.
P
26.1.5
With reference to the requirement in 26.1.4, a transformer
complying with the requirements in one of the following
standards meets the intent of this requirement:
N/A
a) The Standard for Low Voltage Transformers - Part1:
General Requirements, UL 5085-1, and the Standard for Low
Voltage Transformers - Part 3: Class 2 and Class 3
Transformers, UL 5085-3;
N/A
b) The Standard for Class 2 Power Units, UL 1310; or
N/A
.c) The Standard for Transformers and Motor Transformers for
Use in Audio-, Radio-, and Television-Type Appliances, UL
1411.
N/A
26.2
Coil insulation
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26.2.1
A transformer winding including the start, all taps, finish, and
crossover leads up to the point where insulated leads are
provided shall be constructed, when used, as specified in
Table 26.1.
P
26.2.2
Insulating material, such as outer-wrap and crossover-lead
insulation, employed to reduce the risk of live parts from
becoming accessible through openings in the outer enclosure
in accordance with Accessibility of Uninsulated Live Parts, Film-
Coated Wire, and Moving Parts, Section 8, shall comply with
note (a) or (c) of Table 26.1.
P