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PV-ISOTEST
EN - 5
2. GENERAL DESCRIPTION
2.1. FOREWORD
This instrument has been designed to carry out safety tests on photovoltaic (PV)
modules/strings in order to verify the parameters declared by the manufacturer. In addition,
this instrument measures insulation/continuity on PV modules/strings/fields.
2.2. INSTRUMENT
FUNCTIONS
The instrument has the following features:
Continuity test of protective conductors (RPE)
Test with test current > 200mA in compliance with standards IEC/EN62446-1,
IEC/EN61557-4.
Manual calibration of measuring cables.
Measurement of insulation resistance on PV modules/strings (M
)
Test voltages of 250V, 500V, 1000V, 1500VDC in compliance with standards
IEC/EN62446-1,IEC/EN61557-2
2 available measuring modes
DUAL
Measurement in a sequence of the insulation between the string's positive
pole (+) and PE and between the string's negative pole and PE.
TMR
single timed measurement between the string's negative pole and PE.
GFL (Ground Fault Locator) function to search for positions with a low insulation
among the modules of a PV string
(see § 6.3).
The instrument is provided with backlit display, internal contrast adjustment and a
HELP
key able to give a valid help to the operator while connecting the instrument to the
installation. An Auto Power OFF function, which can also be deactivated, is available after
approx. 5 minutes idleness.