1.1 These requirements cover electromagnetic interference (EMI) filters installed on, or connected to, 600 V or lower potential circuits, 50 - 60 Hz, and installed in accordance with the National Electrical Code. 1.2 These requirements cover filters used to attenuate unwanted radio-frequency signals (such as noise or interference) generated from electromagnetic sources. These filters consist of capacitors and inductors used alone or in combination with each other and may be provided with resistors. 1.3 These requirements cover facility filters, cord-connected filters, direct plug-in filters, and appliance filters. 1.4 These requirements do not cover transient-voltage surge suppressors (that is, devices for repeated limiting of voltage surges on power circuits such as silicone avalanche diodes, metal oxide varistors, gas tubes, spark-gaps, etc). Transient Voltage Surge Suppressors are investigated under the Standard for Transient Voltage Surge Suppressors, UL 449. These requirements also do not cover EMI filters for outdoor use. 1.5 These requirements do not cover direct plug-in products and cord-connected products provided with more than two receptacles. A direct plug-in product employing more than two receptacles and having an EMI filter is investigated under the requirements for current taps in the Standard for Attachment Plugs and Receptacles, UL 498. A cord-connected product employing more than two receptacles and having an EMI filter is investigated under the requirements for Relocatable Power Taps, UL 1363. The EMI filter part of these products would be investigated to determine compliance with the requirements in this standard in so far as they apply. This new edition of ANSI/UL 1283 includes the following: 1) Clarification of the Scope, 2) The minimum requirements for insulating materials used within EMI filters, 3) Spacings - Relaxation of the requirements to Spacings section, 4) Capacitors - Minimum requirements for use of capacitors within EMI filters, 5) A full testing program for appliance filters is now required, 6) Temperature - revision to consider the heat generated when placing AC rated voltage across capacitors, 7) Endurance - Single test method at a minimum oven conditioning temperature, 8) Capacitor Discharge - Revised to reduce time to discharge to safe levels, 9) Capacitance Measurement - New requirements to determine if capacitance values change subsequent to the endurance test, 10) Details - Minimum requirements for adhesives used to secure labels, and 11) Other miscellaneous editorial updates.
UL 1283-2005 history
1970UL 1283-2020 UL Standard for Safety for Electromagnetic Interference Filters
2018UL 1283 CRD-2018 UL Standard for Safety Electromagnetic Interference Filters - Section / Paragraph Reference: 29 Subject: Overload test for Filters with Over Temperature Protection (Edition 7; May 17@ 2017)
2018UL 1283 BULLETIN-2018 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: JUNE 4@ 2018)
2017UL 1283 BULLETIN-2017 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: MAY 9@ 2017)
2017UL 1283-2017 UL Standard for Safety Electromagnetic Interference Filters (Seventh Edition)
2016UL 1283 BULLETIN-2016 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: NOVEMBER 23@ 2016)
2015UL 1283 BULLETIN-2015 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: JUNE 29@ 2015)
2015UL 1283-2015 UL Standard for Safety Electromagnetic Interference Filters (Sixth Edition; Reprint with revisions through and including October 7, 2016)
2014UL 1283 BULLETIN-2014 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: April 23@ 2014)
2012UL 1283 BULLETIN-2012 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: June 11@ 2012)
2011UL 1283 BULLETIN-2011 UL Standard for Safety Electromagnetic Interference Filters (COMMENTS DUE: September 07@ 2011)
2008UL 1283 BULLETIN-2008 UL Standard for Safety for Electromagnetic Interference Filters (COMMENTS DUE: September 29@ 2008)
2005UL 1283 BULLETIN-2005 UL Standard for Safety for Electromagnetic Interference Filters
2005UL 1283-2005 UL Standard for Safety for Electromagnetic Interference Filters Fifth Edition; Reprint with revisions through and including July 31, 2007
2004UL 1283 BULLETIN-2004 UL Standard for Safety for Electromagnetic Interference Filters
1998UL 1283-1998 UL Standard for Safety Electromagnetic Interference Filters (Fourth Edition; Reprint with Revisions Through and Including August 18@ 1999)