ST 1-1988 (R1994, R1997)
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
SPECIALITY TRANSFORMERS (EXCEPT GENERAL-PURPOSE TYPE)
07-23-2013
01-12-2013
Foreword
Scope
1 Referenced standards & definitions
2 General
Service conditions
Frequency
Effect of altitude on temperature rise
Insulation systems
Designation of voltage ratings of windings
Low frequency dielectric requirements
Losses and impedances
Basis of ratings
Tests
Marking
3 Control transformers
Output and voltage ratings
Dielectric tests
Voltage ratio
Limits of temperature rise
Construction
4 Industrial control transformers
Types
Output and voltage rating(s)
Dielectric tests
Tolerances for regulation
Limits of temperature rise
Construction
Standard application data
5 Class 2 transformers
Types
Output and voltage ratings
Dielectric tests
Temperature rise
Construction
Output limitations
6 Signalling transformers
Output and voltage ratings
Dielectric tests
No-load losses (excitation losses)
Voltage ratio
Limits of temperature rise
Construction
7 Ignition transformers
Ratings
Dielectric tests
Tolerances for voltage ratio
Limits of temperature rise
Construction
Secondary spark-gap and short-circuit current
Air delivery and electrode spacing
8 Luminous-tube transformers
Ratings
Dielectric tests
Tolerances for voltage ratio
Limits of temperature rise
Construction
Application guide
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