ISO/FDIS 23285

Agricultural machinery, tractors, and earth-moving machinery — Safety of electrical and electronic components and systems operating at 32 V to 75 V DC and 21 V to 50 V AC

This document primarily specifies both general design requirements and guidelines for protection of operators and bystanders against electric shock and electrically induced fire, for voltage classes A2 (32 to 60 V DC and 21 to 30 V AC) and B1 (60 to 75 V DC and 30 to 50 V AC), including waveform synthesized by power electronic converters. This standard is limited to addressing hazards that are not as commonly found in 12 and 24 V DC systems, including those related to higher power converters and drive motors. This document is applicable to electric systems used on: • tractors, self-propelled ride-on machines, interchangeable towed implements, semi-mounted implements, and mounted implements used in or with agriculture and forestry. • earth-moving machinery (EMM) as defined in ISO 6165 and attachments.

Matériel agricole, tracteurs et engins de terrassement — Sécurité des composants et systèmes électriques et électroniques fonctionnant sous 32 V à 75 V DC et 21 V à 50 V AC

General Information

• Status: Not Published
• ICS: 53.100 - Earth-moving machinery
• ICS: 65.060.01 - Agricultural machines and equipment in general
• Technical Committee: ISO/TC 23/SC 19 - Agricultural electronics
• Drafting Committee: ISO/TC 23/SC 19 - Agricultural electronics
• Current Stage: 4099 - Full report circulated: DIS approved for registration as FDIS
• Due Date: 15-Apr-2024
• Completion Date: 15-Apr-2024

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/TC 23/SC 19
Agricultural machinery, tractors,
Secretariat: DIN
and earth-moving machinery —
Voting begins on:
Safety of electrical and electronic
2024-12-03
components and systems operating
Voting terminates on:
at 32 V to 75 V DC and 21 V to 50 V
2025-01-28
AC
Matériel agricole, tracteurs et engins de terrassement —
Sécurité des composants et systèmes électriques et électroniques
fonctionnant sous 32 V à 75 V DC et 21 V à 50 V AC
Member bodies are requested to consult relevant national interests in ISO/TC
127/SC 3 before casting their ballot to the e-Balloting application.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 23/SC 19
Agricultural machinery, tractors, and
Secretariat: DIN
earth-moving machinery — Safety of
Voting begins on:
electrical and electronic components
and systems operating at 32 V to 75
Voting terminates on:
V DC and 21 V to 50 V AC
Matériel agricole, tracteurs et engins de terrassement —
Sécurité des composants et systèmes électriques et électroniques
fonctionnant sous 32 V à 75 V DC et 21 V à 50 V AC
Member bodies are requested to consult relevant national interests in ISO/TC
127/SC 3 before casting their ballot to the e-Balloting application.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions .2
3.2 Abbreviated terms .8
4 General requirements . 9
4.1 V-model . .9
4.2 Voltages .9
4.3 Environmental and operational requirements.9
4.4 Components and devices .10
5 Protection against electric shock hazards . 10
5.1 Overview .10
5.2 General .10
5.2.1 Fundamental requirements .10
5.2.2 Determination of shock protection requirements .10
5.3 Protective measures . .11
5.4 Basic protection . 12
5.4.1 General . 12
5.4.2 Basic insulation . 12
5.4.3 Enclosures or barriers . 12
5.4.4 Limitation of touch current or capacitive discharge energy . 13
5.4.5 Limitation of voltage . 13
5.5 Fault protection .14
5.5.1 General .14
5.5.2 PEPB . . 15
5.5.3 Automatic disconnection of power supply . 20
5.5.4 Supplementary insulation . 20
5.5.5 Basic protection between circuits . 20
5.6 Enhanced protection . 20
5.6.1 General . 20
5.6.2 Reinforced insulation and protective separation between circuit .21
5.6.3 Protection by means of protective impedance and limited capacitive discharge
energy .21
5.7 Equipment protective combinations . 22
5.8 Separation of VC-A2- and VC-B1-systems from VC-B2 (and higher) systems . 22
5.9 Protection against residual voltages . 23
5.9.1 Basic protection . 23
5.9.2 Protection by power supply disruption . 23
5.10 Connector human contact .24
5.10.1 General .24
5.10.2 Mated non-enclosed connectors .24
5.10.3 Non-mated, non-enclosed connectors .24
5.10.4 Enclosed connectors . 25
5.10.5 Tractor implement plug/socket combinations (or similar mobile machinery
implement and attachment combinations) . 25
5.11 Water depth . 25
6 Wiring practices .26
6.1 Conductor and cable runs . 26
6.2 Colour . 26
6.3 Cable protection inside an enclosure . 26
6.4 Power supply voltage differences . 26

iii
7 Overcurrent protection (OCP) .27
7.1 Overview .27
7.2 General .27
7.2.1 Transformers .27
7.2.2 Power converters .27
7.2.3 OCP implementation .27
7.2.4 Rating and setting of OCP . 28
7.2.5 Placement of OCP.
...

Date: 2024-09-08
ISO/TC 23/SC 19/JWG 10
(with ISO/TC127/SC3/WG 9)
Secretariat: DIN
Date: 2024-11-18
Agricultural machinery, tractors, and earth-moving machinery —
Safety of electrical and electronic components and systems
operating at 32 V DC to 75 V DC and 21 V AC to 50 V AC
Matériel agricole, tracteurs et engins de terrassement — Sécurité des composants et systèmes électriques
et électroniques fonctionnant sous 32 V à 75 V DC et 21 V à 50 V AC
Élément introductif — Élément central — Élément complémentaire

FDIS stage
ISO/DISFDIS 23285:2023(E2024(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel.Phone: + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail: [e-mail]
www.iso.org
iii
ISO/DISFDIS 23285:2023(E2024(en)
Contents
Foreword . ix
Introduction . x
1 Scope . 1
2 Normative references . 2
3 Terms, definitions and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Abbreviated terms . 9
4 General requirements . 10
4.1 V-model . 10
4.2 Voltages . 10
4.3 Environmental and operational requirements . 11
4.4 Components and devices . 11
5 Protection against electric shock hazards . 11
5.1 Overview . 11
5.2 General. 11
5.2.1 Fundamental requirements . 11
5.2.2 Determination of shock protection requirements . 12
5.3 Protective measures . 13
5.4 Basic protection . 13
5.4.1 General. 13
5.4.2 Basic insulation . 13
5.4.3 Enclosures or barriers . 13
5.4.4 Limitation of touch current or capacitive discharge energy . 14
5.4.5 Limitation of voltage . 14
5.5 Fault protection . 15
5.5.1 General. 15
5.5.2 PEPB . 16
5.5.3 Automatic disconnection of power supply . 21
5.5.4 Supplementary insulation . 21
5.5.5 Basic protection between circuits . 21
5.6 Enhanced protection. 22
5.6.1 General. 22
5.6.2 Reinforced insulation and protective separation between circuit . 22
5.6.3 Protection by means of protective impedance and limited capacitive discharge energy . 23
5.7 Equipment protective combinations . 23
5.8 Separation of VC-A2- and VC-B1-systems from VC-B2 (and higher) systems . 24
5.9 Protection against residual voltages . 24
5.9.1 Basic protection . 24
5.9.2 Protection by power supply disruption . 25
5.10 Connector human contact . 25
5.10.1 General. 25
5.10.2 Mated non-enclosed connectors . 25
5.10.3 Non-mated, non-enclosed connectors . 26
5.10.4 Enclosed connectors . 26
5.10.5 Tractor implement plug/socket combinations (or similar mobile machinery implement
and attachment combinations) . 26
5.11 Water depth . 27
iv © ISO 2023 – All rights reserved
iv
ISO/DISFDIS 23285:2023(E2024(en)
6 Wiring practices . 27
6.1 Conductor and cable runs . 27
6.2 Colour . 28
6.3 Cable protection inside an enclosure . 28
6.4 Power supply voltage differences . 28
7 Overcurrent protection (OCP) . 29
7.1 Overview . 29
7.2 General. 29
7.2.1 Transformers . 29
7.2.2 Power converters . 29
7.2.3 OCP implementation . 29
7.2.4 Rating and setting of OCP . 30
7.2.5 Placement of OCP . 30
7.2.6 Protection via engine shutoff. 30
7.3 Chassis faults/residual currents . 30
8 Disconnection and connection . 30
8.1 General disconnecting devices . 30
8.2 Specifics of disconnecting . 30
8.2.1 VC-B1 . 30
8.2.2 Power converter disconnects . 31
8.2.3 Manually actuated disconnecting devices . 31
8.2.4 Disconnecting multiple power supplies . 32
8.3 Prevention of unintended start-up . 32
8.4 Charging power supplies and recuperation . 33
Electrical power supplies . 33
8.4.1 33
8.4.2 Powered interchangeable towed machinery and towed machines . 33
8.4.3 PTO . 33
8.5 Pre-charge protective measures . 33
9 Connectors . 34
9.1 General. 34
9.2 Negative connectors and terminals . 34
9.3 Connector mating . 34
9.3.1 Incompletely mated connectors . 34
9.3.2 Connecting and disconnecting under load . 34
9.4 Power cable connections . 35
9.5 Terminals for the PEPB cables . 35
9.6 Plug/socket combination . 36
10 Electric motors and generators . 36
10.1 General.
...