Part 4 Flashcards
Is the following proposition right or wrong?
Replacement of a fuse (a knife-fuse) in loaded conditions is always allowed for a skilled person if a fuse handle with a protective sleeve is being used.
Wrong
SFS 6002 7.4.1 c)
* the skilled person performing the work has been specifically instructed to this work;
* when replacing a knife-fuse, a fuse handle having a protective sleeve as well as clothing having
protection against fire and heat and face shield meeting the requirements of Clause 4.6, shall be
used;
* the worker has to have a permission as permanent order for the work from the nominated person
in charge of the electrical work and a specific order for each work item from the nominated person
in control of the work activity.
Is the following proposition right or wrong?
If any special risks exist in conjunction with fuse replacement, replacement of fuse is allowed to be done by a skilled person, only.
Right
SFS 6002 7.4.1 c)
Is the following proposition right or wrong?
Replacing a knife-fuse, when the fuse is fitted to a dead fuse switch or by opening the disconnecting switch located in supply side of the knife-fuse.
Right
SFS 6002 7.4.1 b)
Is the following proposition right or wrong?
Replacement of a high voltage fuse is allowed to a person specifically instructed to replace fuses at certain consumer location
Wrong
SFS 6002 7.4.1 c)
Replacement of a high voltage fuse is for a skilled person only
T/F?
High qualification level live working activities are Work activities in Extra Low Voltage-installations having high short-circuit level.
False
This is an example of a basic qualification level live working procedure.
T/F?
High qualification level live working activities are repair- and modification work activities in switchgears without contact protection
True
T/F?
High qualification level live working activities are work activities on overhead lines
True
Write down four examples of the basic live working procedures.
(SFS 6002 Appendix Y.9)
work activities in station- and other batteries and in other ELV-installations having high short-circuit level
modifications of control circuits and other supply circuits having a protection device of 25 A, at maximum, e.g. connecting a conductor to block connector or moving a conductor from a block connector to another block connector
making connections with connectors intended for live connecting, e.g. connectors piercing the insulation
assembling or dis-assembling of a component, which can be done easily, e.g. installing a fuseswitch, if it is designed for live working
What are the dimensions for the outer boarder of live working zone DL and the vicinity zone Dv for 10 kV indoor switchyard in Finland?
live working zone DL, 10kV=0,35m (SFS 6002 Appendix Y, Table Y.1) and The outer limit distance of the vicinity zone Dv=1,4m (SFS 6002 Appendix Z, Table Z.1)
Is the following proposition right or wrong?
The nominated person in control of a work activity shall stay at the work location except short absence, e.g. annual holiday.
Wrong
SFS6002 Appendix X, X.6 “If a person in charge of the electrical work is not required, the worker shall
himself control the electrical safety during work.“ “The nominated person in control of a work activity shall
stay at the work location.”
Is the following proposition right or wrong?
If a person in charge of the electrical work is not required, the worker shall himself control the electrical safety during work.
Right
SFS6002 Appendix X, X.6 “If a person in charge of the electrical work is not required, the worker shall
himself control the electrical safety during work.“
Is the following proposition right or wrong?
The nominated person in control of electrical work has to have not only sufficient authorization but also e.g. one has to take health and safety issues into consideration.
Right
SFS 6002, Liite X.6. (And also VnA 1434/2016 Liite 2§)
“The person in charge of the electrical work has to ensure that the nominated person in control of electrical
work has sufficient authorization to carry out duties specified in this standard and that the person is
suitable for this task.”
Which topics needs to be covered in training and instructing on electrical safety and to whom it is for?
SFS 6002, Appendix X.9 Training and instructing of electrical safety:
“All persons being involved in electrical work, including foremen and supervisors as well as persons working
in operational expert jobs, shall be given training and instructing on electrical safety, which shall consist of
the following topics, at least:
* electrical dangers and protection against them;
* the principles of the most important regulations concerning electrical safety, the tasks of the
nominated persons required by legislation and the status of standard SFS 6002;
* applicable parts of the standard SFS 6002.
The content of training shall cover those tasks, in which the participants of the training are working.”
When is it required to make earthing and short-circuiting for low-voltage installations?
SFS 6002 6.2.5.2 Requirements for extra low and low voltage installations
If there is a risk of the installation being made live, e.g.
on overhead lines crossed by other lines or electrically influenced;
* by a stand-by-generator.
In low-voltage installations earthing and short-circuiting shall be made:
* on overhead lines,
* in distribution networks, where emergency generators or micro-generating devices have been
connected to the network and when the owner of the network is not able to disconnect them
reliably (see SFS 6000-8-801:2012, Clause 801.551),
* in switchgears with rated currents higher than 1000 A
What is the correct way to carry out earthing and short-circuiting with portable earthing devices?
SFS 6002 6.2.5.1
Earthing and short-circuiting equipment or devices shall be first connected to the earthing point and then
to the components to be earthed and in reverse order when removing.
In all cases, it shall be ensured that the earthing and short-circuiting equipment or devices and cables and
connectors for bonding used for this purpose are suitable and adequately matched to the fault rating of the
electrical installation where they are installed.
