IEC 61243-2:2002 pdf download

IEC 61243-2:2002 pdf download.Live working – Voltage detectors -Part 2: Resistive type to be used for voltagesof 1 kV to 36 kv a.c.
3.4
contact electrode extension
externally insulated conductive section between the resistive element and the contact electrode, intended to achieve the correct position of the indicator relative to the part to be tested
3.5
voltage detector
a portable device used to detect the presence or the absence of the operating voltage of part
to be tested
3.6
capacitive detector
device whose operation is based on the current passing through the stray capacitance to earth (ground)
3.7
resistive detector (detector)
device whose operation is based on the current passing through a resistor located in the resistive element, and a galvanic connection to earth (ground). Resistive detectors are of two types:
— a single unit including or not an insulating element, with or without contact electrode extension, and
— a separate unit completed with an adaptable insulating pole, with or without contact electrode extension
3.8
insulating element
section of insulating material which provides adequate distance and insulation to the user
3.9
resistive element
element which contains the current-limiting resistor and conductive parts
3.10
testing element
built-in or external device, by means of which the functioning of the detector can be checked by the user
earth lead
lead that connects the detector to earth (ground). It includes an earth clip or clamp
3.12
indicator
part of the detector which indicates the presence or absence of the operating voltage at the contact electrode
3.13
clear indication
unambiguous detection and indication of the voltage state at the contact electrode
3.14
insulating pole
pole made of insulating material
3.15
interference field
electric field which may affect the indication, It may result from the part to be tested or other adjacent components and may have any phase relationship.
The extreme cases for the tests are:
— An in-phase interference field exists when a small change of potential in the direction of the detector axis results in an incorrect indication. This occurs as a result of the dimensions and/or configuration of the part of installation to be tested (or of adjacent parts of installation having voltages in the same phase).
— An interference field in phase opposition exists when a strong change of potential in the direction of the detector axis results in an incorrect indication. This occurs as a result of the adjacent parts of the installation having voltages in phase opposition.
3.16
interference voltage
voltage picked up inductively or capacitively by the part to be tested
3.17
hand guard
distinctive physical guard separating the handle from the resistive or insulating element NOTE Its purpose is to prevent the hand from slipping and passing into contact with the resistive or the insulating element.
3.18
limit mark
distinctive location or mark to indicate to the user the physical limit to which the detector may be inserted between live components or may touch them
3.19
clear perceptibility
case when the indication is unmistakably discernible by the user under specific environmental conditions when the detector is in its operating position
3.20
protection against bridging
protection against flashover or breakdown, when the insulation between the parts of installation to be tested, at different potentials, is reduced by the presence of the detector
3.21
stand-by state
state at which the detector is ready to work at the threshold voltage without manual switching
3.22
response time
time delay between sudden change of the voltage state on the contact electrode and the associated clear indication
3.23
indoor type
detector designed for use in dry conditions, normally indoors
3.24
outdoor type
detector designed for use in wet conditions either indoors or outdoors
3.26
rated voltage (Ur)
value of voltage generally agreed upon by manufacturer and customer, to which certain operating specifications are referred
The rated voltage of the detector is the voltage selected from IEC 60071-1, table 2, column 1, which should either be equal to the nominal voltage (or the highest nominal voltage of its nominal voltage range), or the next higher voltage selected from those tables.