Operations training
High Voltage Standard / V0 - DRAFT 2025-03-21
Human factors are an established science that uses many disciplines (like anatomy, physiology, physics, and biomechanics) to understand how people perform under different circumstances. For the purposes of the GWO HV standard, the term low voltage is used to refer to voltages less than those defined as high voltage. The exact voltage designation varies globally depending on where you work.
Human factors
Low voltage
Note:
IEC defines LV as voltages normally exceeding 50 V AC or 120 V DC but not exceeding 1000 V AC or 1500 V DC between conductors, or 600 V AC or 900 V DC between conductors and earth. According to the ANSI C84.1-2020: low voltage is between 240 to 600 V and medium voltage is 2.4 to 69kV.
From a global perspective, these classifications and ranges change depending on where you work.
Must
For clarity where the word ‘must’ is used in this standard it shall have the same meaning as ‘shall’. A person who is not a Qualified Person and does not have any responsibilities, given that this person generally needs control, instruction, and supervision to carry out assigned working activities.
Ordinary Person
Additionally, a person who can be instructed to apply his personal lockout equipment in accordance with a company specific Lockout-Tagout program, procedures, and rules. Safe System of Work A Safe System of Work (SSOW) is a set of procedures according to which work must be carried out. SSOW are required where hazards cannot be eliminated, and some risk still exists.
The SSOW can include a wide range of elements such risk assessments, permit to work, energy isolations, confined space entry permits, and others. To reduce or eliminate exposure to hazards, they must be strictly followed. A combination of one or more switching devices together with associated control, measuring, signal, protective and regulating equipment etc completely assembled under the responsibility of the manufacturer with all the internal electrical and mechanical interconnections and structural parts. Verbal form used to indicate requirements strictly to be followed in order to conform to this training standard and from which no deviation is permitted. Verbal form used to indicate that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others, or that a certain course of action is preferred but not necessarily required.
Switchgear
Shall
Should
Global Wind Organisation / www.globalwindsafety.org
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