PV-ISOTEST : 1500V เครื่องวัดฉนวนและความต้านทานต่อเนื่องของระบบโซล่าเซล พร้อมฟังก์ชั่นค้นหาความบกพร่องระบบกราวด์ (Ground Fault Locator), IEC/EN 62446-

Photovoltaic technology is changing.
The design and production of installations increasingly takes into consideration the increase in rated voltage, which
allows for the realization of strings up to 30% longer, for a higher generated power and, at the same time, uses a
smaller number of components, which allows for the reduction of energy loss (BoS) up to 30%, while improving profitability.
In this way, an increasing number of photovoltaic installations are realized with a rated voltage close to 1500VDC,
with a view to obtaining the maximization of all the relevant benefits, while falling, at the regulatory
level, in the classification of Low Voltage systems.
Consequently, the probability of a stress on each part of the photovoltaic system generates the need of having
suitable and highly performing tools for an accurate and appropriate verification of these new parameters.
This is why HT Italia has created and developed PV ISOTEST, the first and only instrument suitable to carry out,
on a photovoltaic system up to 1500VDC, the most important safety checks required by standard IEC/EN62446-1,
and to guarantee the quality performance a professional nowadays considers as highly indispensable.
PV-ISOTEST, the future is coming, and HT brings it.

INSULATION IN DUAL MODE
VERIFIES
Verification with an immediate result (OK | NO) of
the insulation resistance of the active conductors
of a module, string or entire photovoltaic field,
according to the requirements of standard
IEC/EN62446, with no need for an external switch
to short-circuit the positive and negative terminals

IDENTIFIES
Automatic identification, with one single test, of
the conformity of the total insulation of a whole
photovoltaic field, with respect to expectations.
PV-ISOTEST is the only verification instrument
capable of simultaneously indicating the insulation
resistance values of both the positive and negative
poles, thus giving the operator the possibility to
direct his search to the real location of the fault.

INSULATION IN TIMER MODE
VERIFIES
Verification with immediate result (OK | NO) of the insulation resistance of a cable
with calculation of the Dielectric Absorption Ratio (DAR = R1min / R30s) and of the
Polarization Index (PI = R10min/R1min), which indicate the state of deterioration of the
insulation.

IDENTIFIES
Evaluation of the values of parameters DAR and PI, specifically useful in case the
insulation of particularly long or old cables is to be tested

GFL (Ground Fault Locator) function
LOCALIZES
PV-ISOTEST provides the precise position of a
possible single fault of low insulation found on a
string of the PV system due, for example, to water or
humidity infiltrations.

RPE FUNCTION
VERIFIES
Verification with an immediate result (OK | NO) of the continuity of the protective
conductors and of the relevant connections with test current >200mA

DMM FUNCTION
DISPLAYS
Immediate display of the DC and RMS voltages (also including possible AC
components) between the poles and the earth.

The GFL function provides correct results with the following
conditions:
? Test carried out with Vtest ?Vnom on a single string disconnected
from the inverter, from possible overvoltage protections and earth connections
? Test carried out upstream of possible blocking diodes
? Single fault of low insulation located at any position in the string
? Insulation resistance of the single fault <0.1M?
Environmental conditions similar to those in which the fault occurred

POWER SUPPLY
Battery type : 6x1.5V alkaline batteries type AA LR06 or
                   : 6x1.2V rechargeable batteries type AA LR06                                  
Battery duration : approx. 500 tests (for each function)
Auto Power OFF : after 5 minutes' idling
OUTPUT INTERFACE
PC interface : optical/USB