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UL - 347 BULLETIN

UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers

active
Organization: UL
Publication Date: 6 March 2019
Status: active
Page Count: 132
scope:

Scope and object

This standard is applicable to ac contactors applied at voltages in the range of 1 501V to 15kV, and metal-enclosed contactor-based controllers, control centers, and other control assemblies and associated equipment applied at voltages in the range of 751V to 15kV, designed for operation at frequencies of 50 or 60 Hz on three-phase systems. These requirements cover equipment intended for use in ordinary (non-hazardous) locations and installed in accordance with the applicable local installation codes and standards (see Annex A, Item 1). These requirements, as modified by the applicable national standards for fire pump controllers, also cover fire pump controllers (see Annex A, Item 2).

This standard also includes requirements for controllers intended for service entrance applications. (See 5.204 and Annex A, Item 3.)

This standard also includes requirements for equipment incorporating solid state switching elements intended for starting, stopping, regulating, controlling, or protecting heating and other resistive loads, having a-c voltage ratings above 1500 V, up to 15 kV.

This standard does not cover:

a) equipment for use in classified (hazardous) locations as defined in the applicable installation codes or standards;

b) components contained in contactors and contactor-based controllers for which individual component standards exist; and

c) auxiliary low voltage control assemblies (see Annex A, Item 4).

This standard also includes requirements for reduced-voltage solid state controllers. It does not, however, cover equipment consisting solely of electronic or solid state devices, circuits, or systems, nor does it cover electronic variable speed motor controllers (power conversion equipment). This standard does not cover controllers using only solid state devices in the main circuit.

Document History

May 29, 2020
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
November 1, 2019
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
Scope and object This standard is applicable to ac contactors applied at voltages in the range of 1 501V to 15kV, and metal-enclosed contactor-based controllers, control centers, and other control...
347 BULLETIN
March 6, 2019
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
Scope and object This standard is applicable to ac contactors applied at voltages in the range of 1 501V to 15kV, and metal-enclosed contactor-based controllers, control centers, and other control...
August 27, 2018
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
August 7, 2018
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
May 15, 2015
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
December 8, 2014
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
July 25, 2014
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
June 20, 2014
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
Scope and object This standard is applicable to ac contactors applied at voltages in the range of 1 501V to 15kV, and metal-enclosed contactor-based controllers, control centers, and other control...
January 17, 2013
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.
March 18, 2011
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
Scope and object This standard is applicable to ac contactors with rated voltages of 1 501 to 7 200 V, and metal-enclosed contactor-based controllers, control centers, and other control assemblies...
May 8, 2009
UL Standard for Safety High Voltage Industrial Control Equipment
These requirements cover enclosed industrial control equipment and associated components intended for starting, stopping, regulating, controlling, or protecting electric motors or other electrical...
August 22, 2008
UL Standard for Safety High Voltage Industrial Control Equipment
These requirements cover enclosed industrial control equipment and associated components intended for starting, stopping, regulating, controlling, or protecting electric motors or other electrical...
July 29, 2008
UL Standard for Safety High Voltage Industrial Control Equipment
These requirements cover enclosed industrial control equipment and associated components intended for starting, stopping, regulating, controlling, or protecting electric motors or other electrical...
October 19, 2007
UL Standard for Safety High Voltage Industrial Control Equipment
These requirements cover enclosed industrial control equipment and associated components intended for starting, stopping, regulating, controlling, or protecting electric motors or other electrical...
May 11, 2007
UL Standard for Safety High Voltage Industrial Control Equipment
A description is not available for this item.
June 28, 2005
UL Standard for Safety Medium-Voltage AC Contactors, Controllers, and Control Centers
A description is not available for this item.

References

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