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CSDS Proposal
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March 04, 2020
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February 07, 2020
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February 05, 2020
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September 24, 2019
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August 14, 2019
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Summary of Topics b1741_2_20190814_sum.htmlSubject 1741 Bulletin Dated: August 14, 2019SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being recirculated: 1. Withdrawal of Proposal: Rapid Shutdown Revisions to Better Align with the Standard for Photovoltaic (PV) Module Safety Qualification - Part 1: Requirements for Construction, UL 61730-1.
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March 14, 2019
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Summary of Topics b1741_2_20190314_sum.htmlSubject 1741Bulletin Dated: March 14, 2019SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers andInterconnection System Equipment for Use With Distributed Energy Resources, UL 1741, arebeing proposed preliminary review and comment only: 1. For Preliminary Review Only: Addition of Requirements Covering Power ControlSystems (PCS).
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October 31, 2018
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Summary of Topics b1741_2_20181031_sum.htmlSubject 1741 Bulletin Dated: October 31, 2018SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Rapid Shutdown Revisions to Better Align with the Standard for Photovoltaic (PV) Module Safety Qualification - Part 1: Requirements for Construction, UL 61730-1.
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September 17, 2018
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Summary of Topics b1741_2_20180917_sum.htmlSubject 1741 Bulletin Dated: September 17, 2018SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Revision to Section 13.1, Disconnect Device Actuator Options.
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June 18, 2018
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Summary of Topics b1741_2_20180618_sum.htmlSubject 1741 Bulletin Dated: June 18, 2018SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Expanding Requirements for AC Modules and Including Requirements for PV Modules with Integrated Electronics.
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April 24, 2018
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Summary of Topics b1741_2_20180424_sum.htmlSubject 1741 Bulletin Dated: April 24, 2018SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed preliminary review and comment only: 1. For Preliminary Review Only: Addition of Multi-Mode Inverter Requirements Including Supply Conductor Grounding. 2. For Preliminary Review Only: Expanding Requirements for AC Modules and Including Requirements for PV Modules with Integrated Electronics.
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January 12, 2018
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Summary of Topics b1741_2_20180112_sum.htmlSubject 1741 Bulletin Dated: January 12, 2018SUMMARY OF TOPICSThe following topic for the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, is being recirculated: 2. Removal of Table 68.1 and Addition of a Reference to Tables 1 and 2 of the Standard for Interconnecting Distributed Resources with Electric Power Systems, IEEE 1547.
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November 17, 2017
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Summary of Topics b1741_2_20171117_sum.htmlSubject 1741 Bulletin Dated: November 17, 2017SUMMARY OF TOPICSThe following topic for the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, is being recirculated: 1. Additional Requirements for PV Rapid Shutdown Equipment and Systems.
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August 18, 2017
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Summary of Topics b1741_2_20170818_sum.htmlSubject 1741 Bulletin Dated: August 18, 2017SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Additional Requirements for PV Rapid Shutdown Equipment and Systems.
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January 09, 2017
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Summary of Topics b1741_2_20170109_sum.htmlSubject 1741 Bulletin Dated: January 9, 2017SUMMARY OF TOPICSThe following is being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Additional Requirements for Single Phase 2 Wire Utility Interactive Inverters Connected to Single Phase 3 Wire EPS Circuits.
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August 05, 2016
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Summary of Topics b1741_2_20160805_sum.htmlSubject 1741 Bulletin Dated: August 5, 2016SUMMARY OF TOPICSThe following topic for the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, is being recirculated: 1. Addition of a Supplement for Grid Support Utility Interactive Inverters.
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June 10, 2016
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Summary of Topics b1741_2_20160610_sum.htmlSubject 1741 Bulletin Dated: June 10, 2016SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Additional Requirements for PV Rapid Shutdown Systems.
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May 02, 2016
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Summary of Topics b1741_2_20160502_sum.htmlSubject 1741 Bulletin Dated: May 2, 2016SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Addition of a Supplement for Grid Support Utility Interactive Inverters. 2. Removal of Table 68.1 and Addition of a Reference to Tables 1 and 2 of the Standard for Interconnecting Distributed Resources with Electric Power Systems, IEEE 1547.
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March 29, 2016
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Summary of Topics b1741_2_20160329_sum.htmlSubject 1741 Bulletin Dated: March 29, 2016SUMMARY OF TOPICSThe following change in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, is being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Removal of Table 68.1 and Addition of a Reference to Tables 1 and 2 of the Standard for Interconnecting Distributed Resources with Electric Power Systems, IEEE 1547.
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January 29, 2016
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Summary of Topics b1741_2_20160129_sum.htmlSubject 1741 Bulletin Dated: January 29, 2016SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being recirculated: 1. Modifications to Table 67.1 for a Correction in Condition B and a Clarification of Conditions C and D Formula Usage.
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October 16, 2015
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Summary of Topics b1741_2_20151016_sum.htmlSubject 1741 Bulletin Dated: October 16, 2015SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Modifications to Table 67.1 for a Correction in Condition B and a Clarification of Conditions C and D Formula Usage.
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September 10, 2015
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Summary of Topics b1741_2_20150910_sum.htmlSubject 1741 Bulletin Dated: September 10, 2015SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Modifications to Table 67.1 for a Correction in Condition B and a Clarification of Conditions C and D Formula Usage.
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May 19, 2015
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Summary of Topics b1741_2_20150519_sum.htmlSubject 1741 Bulletin Dated: May 19, 2015SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Addition of a Supplement for Grid Support Utility Interactive Inverters.
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March 27, 2015
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Summary of Topics b1741_2_20150327_sum.htmlSubject 1741 Bulletin Dated: March 27, 2015SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Additional Requirements for PV Rapid Shutdown Systems.
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May 30, 2014
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Summary of Topics b1741_2_20140530_sum.htmlSubject 1741 Bulletin Dated: May 30, 2014SUMMARY OF TOPICSThe following new UL IEC-Based Standard is being recirculated: 1. First Edition of the UL IEC-Based Standard for Safety of Power Converters for Use in Photovoltaic Power Systems - Part 1: General Requirements, UL 62109-1.
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February 21, 2014
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Summary of Topics b1741_2_20140221_sum.htmlSubject 1741 Bulletin Dated: February 21, 2014SUMMARY OF TOPICSThe following new UL IEC-Based Standard is being proposed: 1. First Edition of the UL IEC-Based Standard for Safety of Power Converters for Use in Photovoltaic Power Systems - Part 1: General Requirements, UL 62109-1.
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September 20, 2013
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Summary of Topics b1741_2_20130920_sum.htmlSubject 1741 Bulletin Dated: September 20, 2013SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Additional Requirements for PV Input Circuit Combiners and PV Combiner Boxes.
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April 04, 2013
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Summary of Topics b1741_2_20130404_sum.htmlSubject 1741 Bulletin Dated: April 4, 2013SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Addition of Transformer and Inductor Evaluation Requirements. 2. For Preliminary Review Only: Addition of Requirements for Special Purpose Utility-Interactive Products
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July 13, 2012
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N/A
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June 29, 2012
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Summary of Topics b1741_2_20120629_sum.htmlSubject 1741 Bulletin Dated: June 29, 2012SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Requirement Updates for PV Switches, Controls, Disconnects and Circuit Breakers. 2. For Preliminary Review Only: Additional Instruction Manual Requirements. 3. For Preliminary Review Only: Additional Requirements for Isolated Inverters Intended for Use with Ungrounded PV Arrays.
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August 12, 2011
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Summary of Topics b1741_2_20110812_sum.htmlSubject 1741 Bulletin Dated: August 12, 2011SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Addition of Requirements for Arc Fault Circuit Protection. 2. For Preliminary Review Only: Additional Exception for Acceptable Barrier Materials and Thicknesses in Paragraph 26.2.1.
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June 23, 2011
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Summary of Topics b1741_2_20110623_sum.htmlSubject 1741 Bulletin Dated: June 23, 2011SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Additional Requirements for PV Input Circuit Combiners and PV Combiner Boxes.
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May 27, 2010
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Summary of Topics b1741_2_20100527_sum.htmlSubject 1741 Bulletin Dated: May 27, 2010SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Additional Requirements for Non-Isolated EPS Interactive PV Inverters Rated Less Than 30 Kva. 2. For Preliminary Review Only: Additional Values for the Spacings Table 24.1 to be Used for Products with Operating Voltages Over 600 V. 3. For Preliminary Review Only: Revisions to Paragraph 25.4 to Allow for Reduction in Overvoltage and Pollution Degree for Certain Installation Locations. 4. For Preliminary Review Only: Additional Requirements for Products with Liquid Cooling Systems.
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March 03, 2010
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Summary of Topics b1741_2_20100303_sum.htmlSubject 1741 Bulletin Dated: March 3, 2010SUMMARY OF TOPICSThe following changes in requirements to the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741, are being proposed: 1. Addition of protective impedance as a method of separating external signal circuits from hazardous voltage circuits
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