1 Scope

This part of IEC 61800 specifies requirements for adjustable speed power drive systems, or their elements, with respect to electrical, thermal and energy safety considerations. It does not cover the driven equipment except for interface requirements. It applies to adjustable speed electric drive systems which include the power conversion, drive control, and motor or motors. Excluded are traction and electric vehicle drives. It applies to d.c. drive systems connected to line voltages up to 1 kV a.c., 50 Hz or 60 Hz and a.c. drive systems with converter input voltages up to 35 kV, 50 Hz or 60 Hz and output voltages up to 35 kV.

Other parts of IEC 61800 cover rating specifications, EMC, functional safety, etc.

The scope of this part of IEC 61800 does not include devices used as component parts of a PDS if they comply with the safety requirements of a relevant product standard for the same environment. For example, motors used in PDS shall comply with the relevant parts of IEC 60034.

Unless specifically stated, the requirements of this International Standard apply to all parts of the PDS, including the CDM/BDM (see ).

NOTE In some cases, safety requirements of the PDS (for example, protection against direct contact) can necessitate the use of special components and/or additional measures.

1.1 This document is only applicable to the power conversion and drive control equipment, servo drives and integral servo drive/motor combinations.

1.2 This standard applies to drives with an input rating up to and including 1,5 kV a.c. or d.c.

1.3 A component of a product covered by this standard shall comply with the requirements for that component. See Annex DVA for a list of additional standards covering components used in the products covered by this standard.

1.4 The scope includes BDM/CDM/PDS intended for connection to photovoltaic (PV) modules with output voltages not exceeding 1.5 kV DC.

This equipment is for use in ordinary locations in accordance with Articles 430 and 440 of the National Electrical Code, NFPA 70.

Specifications provided in other parts of the 61800 Series of Standards (for example EMC in part 3) apply only on agreement between the manufacturer and the customer.

Summary of Topics

This revision of ANSI/UL 61800-5-1 dated July 24, 2026 includes the following changes in requirements:

– Revision of Annex DVD.DVD.2.4.4.6.DVD.2.4.4.6.1 – Forced Ventilation in Operator Space

– Type 12 Ventilated Enclosures; Annex DVD.DVD.2.1.3.DVD.2.1.3.3

– Multiple Sources of Supply; 4.1.4.1DV.4, 4.6.4.17DV, 5.2.9.5.2.14DV, and 6.5.6.6DV

– DC Clearance Requirements; 3.3.18ADV.1, 3.3.18ADV.2, 4.3.6.2.1.4.3.6.2.1DV.4, 4.3.6.2.3.4.3.6.2.3DV, 4.3.6.2.4.4.3.6.2.4DV.3, 6.2.6.2DV.1.7.

– Fault Testing with DC Sources; 3.3.16DV, 3.3.18ADV.1, 3.3.19DV, 4.3.9.4.3.9DV.1.2, 5.2.3.6.2.5.2.3.6.2DV.4.1.16, 5.2.3.6.2.5.2.3.6.2.1DV.1.1, 5.2.3.6.2.5.2.3.6.2.1DV.1.2, 5.2.3.6.2.5.2.3.6.2.1DV.2.1, 5.2.3.6.2.5.2.3.6.2.1DV.2.2, 5.2.3.6.2.5.2.3.6.2.1DV.2.4, 5.2.3.6.2.5.2.3.6.2.1DV.2.5, 5.2.3.6.2.5.2.3.6.2.1DV.2.6, 5.2.3.6.2.5.2.3.6.2.1DV.2.6.1, 5.2.3.6.2.5.2.3.6.2.1DV.2.6.2, 5.2.3.6.2.5.2.3.6.2.1DV.2.6.6, 5.2.3.6.2.5.2.3.6.2.1DV.2.6.7, 5.2.3.6.2.5.2.3.6.2.1DV.2.7, 5.2.3.6.2.5.2.3.6.2.1DV.2.8, 5.2.3.6.2.5.2.3.6.2.1DV.2.9, 5.2.3.6.2.5.2.3.6.2.1DV.3, 5.2.3.6.2.5.2.3.6.2.1DV.4, 5.2.3.6.2.5.2.3.6.2.1DV.6, 6.2.6.2DV.1.7 – 6.2.6.2DV.1.9, 6.3.7.6.3.7DV.2.1, 6.3.7.6.3.7DV.2.2, and 6.3.7.6.3.7DV.3.1.

– Withdrawal and replacement of ANSI/ISA MC96.1, Temperature-Measurement Thermocouples; 5.2.3.8.5.2.3.8DV.2.6

The Second edition of UL 61800-5-1 is an adoption of IEC 61800-5-1, Second Edition, issued by the IEC July 2007 and its amendment 1 issued August 2016. Please note that the National Difference document incorporates all of the U.S. national differences for UL 61800-5-1.