General Description; Foreword; Instrument Functions - HT PV-ISOTEST User Manual

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.
EN - 5
PV-ISOTEST