UL 1741 BULLETIN-2016 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: September 5@ 2016)
These requirements cover grid support utility interactive inverters and converters. This Supplement to UL 1741 is intended to validate compliance with grid interactive functions which are not yet covered in IEEE 1547-2003. These grid support functions may include but are not limited to voltage and frequency ride through and active and reactive power control. These Grid Support Functions may impact an inverter??s anti-Islanding functionality; therefore Anti-islanding testing will be conducted with these functions enabled as described in the applicable sections below. The intention of this supplement is to define the evaluation criteria for utility interactive inverters with grid support functions that are rated and specified as ??Grid Support Utility Interactive Inverters??. This new nomenclature is intended to differentiate these products from ??utility interactive inverters.?? The test requirements and protocols within this section are written to allow for the testing of multiple operational parameter sets of limits and times in an effort to accommodate the needs of different grid interconnection requirements. These functional requirements will be defined in a source requirements document (SRD). This Supplement is intended to validate compliance of a EUT with a stated SRD(s) across the range of EUT operation. Multiple SRDs may be encompassed by the range of operation and or addition of functions. Where there are conflicting requirements between SRD(s)@ additional testing may be needed to evaluate the specific functional requirements of each SRD The requirements in this supplement are in addition to the other applicable requirements for utility interactive inverters and other applicable requirements within this standard. Following the procedures described herein@ manufacturers may rate their units to a variety of different regulatory requirements or have adjustable ranges of operation that will address the needs of a variety of different regulatory requirements. The test procedures are not written with a specific regulatory regime in mind. These requirements and tests are intended to establish the template for the identified performance functions and allow for validation of conformance with specific specified performance parameters that can be used to demonstrate compliance with local requirements. The manufacturer will utilize the ratings to state the settings for which the unit will be tested. Products shall be provided with ratings shown in SA16 including all of the defined parameters and settings in order to validate compliance. This Supplement for Grid Support Utility Interactive Inverters was drafted using the ??special purpose utility interactive inverter?? CRD that allowed for manufacturer defined grid interconnection protection functions. While the Grid Support utility interactive inverters share some similar functionality with the previously defined special purpose utility interactive inverters that have potentially variable compliance requirements@ the Grid Support Utility interactive inverters are required to and shall comply with the following defined requirements before they can be marked as a Grid Support Utility Interactive Inverters. Some of the requirements in this supplement are defined as optional@ see Frequency-Watt (FW) ?C Optional@ Section SA14@ and Volt-Watt (VW) ?C Optional@ Section SA15@ and are not required to be included or complied with as part of the evaluation. Functions specified in this document as optional shall be evaluated if provided. The tests in this supplement verify the performance of a single unit when connected to an area EPS. The single unit may include multiple pieces of equipment. Any additional equipment necessary for the proper functioning of the EUT shall be included in the test. Performance of systems of multiple units is beyond the scope of this document. Within this supplement@ the pass fail criteria is expressed mathematically or with defined limits and or time responses. Figures in this supplement are considered to be informative with exception of the test waveforms or if otherwise noted in the text.
UL 1741 BULLETIN-2016 history
1970UL 1741-2022 Static inverters and charge controllers for use in photovoltaic power systems
2020UL 1741 CRD-2020 Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (Certification Requirement Decision, 3/11/2020)
2018UL 1741 CRD-2018 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Subject: Power Control Systems (PCS) (Edition 2: April 20@ 2010)
2018UL 1741 BULLETIN-2018 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: February 12@ 2018)
2017UL 1741 BULLETIN-2017 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: January 23@ 2017)
2016UL 1741 CRD-2016 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Sections – 40B1- 40B2 Subject: Additional Requirements for Single Phase 2 Wire Ut
2016UL 1741 BULLETIN-2016 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: September 5@ 2016)
2015UL 1741 CRD-2015 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources -Section / Paragraph Reference: New Sections – 40B1- 40B2 Subject: Additional Requirements for Single Phase 2 Wire Uti
2015UL 1741 BULLETIN-2015 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2014UL 1741 BULLETIN-2014 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: April 07@ 2014)
2013UL 1741 CRD-2013 UL Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: Sec. 101 to 107 Subject: Clarification for PV Input Circuit Combiners and PV Combiner
2013UL 1741 BULLETIN-2013 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: October 21@ 2013)
2012UL 1741 CRD-2012 UL Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Section 108 Subject: Arc Fault Circuit Protection (Edition 2: January 28, 2010)
2012UL 1741 BULLETIN-2012 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: August 13@ 2012)
2011UL 1741 CRD-2011 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Section 108 Subject: Arc Fault Circuit Protection (Edition 2: January 28@ 2010)
2011UL 1741 BULLETIN-2011 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2010UL 1741 CRD-2010 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New proposed sections 87 to 100. Subject: Non-Isolated EPS Interactive PV Inverters R
2010UL 1741 BULLETIN-2010 Summary of Topics This bulletin announces the availability of the Outline of Investigation for Enclosed and Dead-Front Switches for Use in Photovoltaic Systems, Subject 98B.
2010UL 1741-2010 Inverters, converters, controllers and interconnection system equipment for use with distributed energy resources
2009UL 1741 BULLETIN-2009 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: JULY 13@ 2009)
2008UL 1741 BULLETIN-2008 UL Standard for Safety Inverters@ Converters@ and Controllers for Use in Independent Power Systems (COMMENTS DUE: October 27@ 2008)
2005UL 1741 BULLETIN-2005 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2004UL 1741 BULLETIN-2004 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2001UL 1741 BULLETIN-2001 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
1999UL 1741-1999 Static inverters and charge controllers for use in photovoltaic power systems