1.1 These requirements cover single-phase or three-phase, dry-type, distribution transformers, including solid cast and resin encapsulated transformers. The transformers are provided with either ventilated or non-ventilated enclosures and are rated for a primary or secondary voltage from 601 to 35000 V.
1.2 These transformers are intended for installation in accordance with the National Electrical Code, ANSI/NFPA 70.
1.3 These requirements do not cover the following transformers:
a) Instrument transformers
b) Step-voltage and induction voltage regulators
c) Current regulators
d) Arc furnace transformers
e) Rectifier transformers
f) Specialty transformers (such as rectifier, ignition, gas tube sign transformers, and the like)
g) Mining transformers
h) Motor-starting reactors and transformers
1.4 These requirements do not cover transformers under the exclusive control of electrical utilities utilized for communication, metering, generation, control, transformation, transmission, and distribution of electric energy regardless of whether such transformers are located indoors, in buildings and rooms used exclusively by utilities for such purposes; or outdoors on property owned, leased, established rights on private property or on public rights of way (highways, streets, roads, and the like).
This revision of UL 1562 dated August 11, 2020 was issued to update requirements for Insulation Systems; 8.1, 8.1.1, and Table 8.1.
RevisionsRed Line Std. (8)
CSDS Proposals (8)
CSDS Proposals
An electronic document associated with a UL Standard for Safety or Outline of Investigation, and issued by UL to propose:
UL LLC CRD (0)
Other Updates (1)
Bulletins
These bulletins are not used in CSDS. These are announcement and report type bulletins.
This bulletin announces the availability of the Outline of Investigation for Dry Type Transformer Insulation Systems Rated Above 1kV, UL 1446A
Referenced Standards (1)
Reverse Referenced Standards (4)
The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. We also offer two different types of subscriptions: a one year and a three year.
You will be able to choose your purchase options on the following pages.
To serve you better, please update your account details.
Sample