IEC 62841-4-9 ED1

Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 4-9: Particular requirements for battery-powered chain saws for tree service

Scope

IEC 62841-4-9: 2025 applies to rechargeable battery-powered motor-operated chain saws for tree service, hereinafter referred to as chain saws or machines, having a maximum mass of 5,0 kg. The mass includes the heaviest detachable battery pack(s), if any, as described in IEC 62841-1:2014, K.8.14.2 e) 2), but excludes the guide bar, saw chain and saw chain lubricant. Chain saws covered by this document are intended to be used for pruning and dismantling standing tree crowns.
The chain saws covered by this document are designed only to be operated with the right hand on the rear handle and the left hand on the front handle.
This document does not apply to
– chain saws supplied by mains power or power from non-isolated sources that permit the machine to be used while connected to such power supplies; or
– chain saws supplied by integral batteries; or
– chain saws for cutting wood as covered by IEC 62841-4-1; or
– chain saws designed for use in conjunction with a guide-plate and riving knife or in any other way such as with a support or as a stationary or transportable machine; or
– pole-mounted pruners; or
NOTE 1 Pole-mounted pruners are covered by IEC 62841-4-10.
– pruning saws.
NOTE 2 Pruning saws will be covered by a future part of IEC 62841-4.
The maximum rated voltage for machines and battery packs is 75 V d.c.
Battery machines covered by this document are not considered to be class I tools, class II tools or class III tools and therefore are not required to have basic insulation, supplementary insulation or reinforced insulation. Electric shock hazard is considered to exist only between parts of opposite polarity.
This document deals with the hazards presented by machines which are encountered by all persons in the normal use and reasonably foreseeable misuse of the machines.
When evaluating a rechargeable battery pack for protection against electric shock during charging, creepage distances, clearances and distances through insulation, the relevant requirements of this document are applicable with the battery pack fitted to the intended charger.
Since rechargeable battery packs for machines are submitted to different use patterns (such as rough use, high charging and discharging currents), their safety can be evaluated only by this document and not by using other standards for rechargeable battery packs, such as IEC 62133-1:2017 or IEC 62133-2:2017, unless otherwise indicated in this document. All relevant aspects related to the safety of rechargeable batteries are addressed in this document, such that the requirements of IEC 62133-1:2017 or IEC 62133-2:2017 are not required to be separately applied.
When evaluating the risk of fire associated with rechargeable battery packs for machines, consideration has been given to the fact that these battery packs are unattended energy sources and have been evaluated as such in this document. Requirements in other standards regarding the risk of fire due to the charging of these battery packs are therefore considered to be fulfilled.
This document also addresses requirements covering the use of lithium-ion cells employed in battery systems in machines. The following is considered within the context of these requirements:
– These requirements address the risk of fire or explosion of these batteries and not any possible hazards associated with toxicity nor potential hazards associated with transportation or disposal.
NOTE 3 IEC 62281:2019 covers the safety aspects of lithium-ion batteries during transport.
– Battery systems covered by these requirements are not intended to be serviced by the end user.
– These requirements are intended to provide comprehensive evaluation of a battery only if used in products covered by this document.
– These requirements address the safety of lithium-ion battery systems during storage and use including discharge and charge. These requirements are only considered to be supplementary requirements in regard to battery charger fire and electric shock.
– These requirements refer to and require parameters supplied in reference to the cells that establish conditions for safe use of those cells. Those parameters form the basis of acceptance criteria for a number of tests contained herein. This document does not independently evaluate the safety of cells. These parameters, taken as a set, constitute the "specified operating region" for a cell. There can be several sets of specified operating region(s).
This document does not apply to machines using general purpose batteries installed by the user and this document alone will not be sufficient to ensure that all hazards are considered for these products.
This document does not apply to the safety of battery chargers themselves.
NOTE 4 IEC 60335-2-29 covers a variety of chargers.
This document is to be used in conjunction with the first edition of IEC 62841‑1:2014 and IEC 62841 1:2014/AMD1:2025.
This document supplements or modifies the corresponding clauses in IEC 62841-1:2014, so as to convert it into the IEC Standard: Particular requirements for battery-powered chain saws for tree service.
Subclauses, notes, tables and figures which are additional to those in IEC 62841 1:2014 are numbered starting from 101.
Subclauses, notes, tables and figures in Annex K which are additional to those in the main body of this document are numbered starting from 301.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations can need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 36 months from the date of publication.