Dewetron PUREC, Technical Reference Manual

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53
450182 • PU[REC] • Technical Reference Manual • Printing version 1.0.0 • November 2
nd
, 2020
Input ranges
Like all measurement devices DEWETRON measurement equipment provides one or more 'Input ranges' .
An 'input range' indicates the highest possible value which can be displayed, similar to the limit position of a dial
instrument.
Note: The value of the 'input range' does not give any information concerning the allowable scope
of application (please refer to rated input according to IEC/EN 61010-2-30).
Rated input according to IEC/EN 61010-2-30
' Rated input ' indicates the allowable scope of application of a measurement input according to the IEC/EN 61010-
2-30 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use - Part 2-030:
Particular Requirements for Equipment Having Testing or Measuring Circuits). DEWETRON equipment (respectively
measurement inputs) are always specified according to this stated standard, the compliance tests are done by a 3
rd
party laboratory.
The value '
rated input ' specifies the highest possible voltage which can be applied to the measurement input. The IEC/
EN 61010-2-30 additionally describes certain measurement categories within a public power grid (see also overvoltage
categories IEC/EN 60664-1). Thus, measurement circuits are allowed to be applied according to their specification to
the power grid categories as stated below.
123 123
DISTRIBUTION
BOARD
CAT X CAT II CAT III CAT IV
123
The isolation is tested according to the IEC/EN 61010-2-30. The level of the isolation voltage depends on the rated
input voltage and on the measurement category. Since potential overvoltage phenomena are higher within higher
power grid categories, the isolation voltage needs to be higher too.
DESCRIPTION OF VOLTAGE SPECIFICATIONS