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.

Functions

Guidelines

The post HT Instruments PV-ISOTEST Multifunction Tester for Photovoltaic system appeared first on Obiat Electronics.

• The only I-V curve tracer suitable for new PV plants with 1500VDC string voltage.
• Compact, lightweight and On-board screen: I-V500w needs only one person thanks to the on-board screen and returns immediate test results with OK or NOT OK outcome.
• Multi-String Autosequence™: Just few seconds to measure, save data and move to next string.
• Wi-Fi Connection: Connect your smartphone or tablet to download and analyze in details your measures with exclusive features like Troubleshooting Assistant, Jump function and others available only on the APP HTANALYSIS™. W

The HT ITALIA I-V500w 1500V I-V Curve Tracer allows field detection of I-V Curve and of the main characteristic parameters both of a single module and of strings of modules for PV installations up to a maximum of 1500V and 10A or 1000V and 15A.

For measuring I-V Curve, I-V500w manages an internal database of the modules, which can be updated at any time by the user and comparison between the measured data with the rated values allows immediately evaluating whether the string or the module fulfills the efficiency parameters declared by the manufacturer. I-V Curve can be measured also by decentralizing measurement of irradiation and temperature by using the optional remote unit SOLAR02, using the radio frequency connection (RF) with the master unit.

Also for HT ITALIA I-V500w , the display at the end of the test of I-V Curve is a clear indication about the compliance with the specifications declared by the panel manufacturer.

HT ITALIA I-V500w Functions:

The post HT ITALIA I-V500w 1500V I-V Solar Panel Curve Tracer appeared first on Obiat Electronics.

The innovative accessory HT Italia MPP300is used together with SOLAR300N or SOLAR I-V to measure and record the main parameters which characterise single-phase and three-phase, single-string and multi-string (up to three strings) photovoltaic systems.

It is perfect for use in systems with three-MPPT three-phase inverter and in three-phase systems provided with three single-phase inverters.

It is provided with a practical anti-shock “field” case, lightweight and small in size.

The front panel carries the LEDs for operating information and the DC and AC inputs for upstream and downstream connection of the inverter(s).

The HT Italia MPP300 interfaces with SOLAR300N via USB connection and SOLAR I-V via wireless connection. The SOLAR300N and SOLAR I-V are used to control the settings for the MPP300 (ie. to start/stop the recordings of electrical and environmental parameters and to enable the download of the recorded values).

The common problems

The distance between the photovoltaic modules and the inverter is often considerable, and this forces the operator to carry out measurements in different places at the same time. Therefore, it would be necessary to lay long connection cables between the environmental probes and the instrument. These cables could hamper the operator’s movements and be a hindrance. This kind of connection is therefore not acceptable.

In terms of photovoltaic installations located on top of buildings, the so-called photovoltaic roof presents another problem – reinforced concrete or metal structures, etc. must be taken into consideration. These structures would make an impossible for radio (wireless) connection between the environmental probes and the instrument, because of signal attenuation.

The solution

The master instrument: SOLAR300N or SOLAR I-V is only used in the initial and final phase of recording and it does not play any active role whilst recording the electrical and environmental parameters. Therefore, while the MPP300 and the SOLAR-02 respectively record the electrical and environmental parameters of the system being tested, it is possible to use the master instrument (SOLAR300N or SOLAR I-V) to carrying out other measurements. For example, with the SOLAR I-V it is possible to measure the I-V characteristics of strings and modules.

HT Italia MPP300 Specifications:

The post HT Italia MPP300 Adapter for PV Testing on Multistring Installation appeared first on Obiat Electronics.

HT Italia PVCHECK checks the Safety, Parameters and Performance and allows prompt and safe electrical checks that are required for a Photvoltaic (PV) systems DC section as well as controls on working of modules / strings in accordance with IEC/EN62446 guidelines.

HT Italia PVCHECK Functions:

• Safety test of PV installation
• Continuity test on protective conductors with 200mA
• Insulation test with test voltage of 250, 500, 1000VDC
• DC voltage
• DC current
• DC Power
• Solar irradiation [W/m2] with reference cell
• Environmental  and module temperature by means of PT1000 probe
• SOLAR-02: remote unit for irradiance and temperature measurements (RF connection).
• Recording of PV plant parameters (DC side) with programmable IP (5s – 60min)
• Use of PDC compensation ratios according to environmental and module temperature
• Use of relationship to maximize the DC efficiency
• Outcome OK/NO
• Check of PV string’s working
• Measurement of open circuit voltage up to 1000V DC
• Measurement of short circuit current up to 15A DC
• Measurement of temperature, automatic or by means of  PT1000 probe
• Measurement of solar radiation [W/m2] with reference cell
• Mechanical inclinometer for the detection of solar radiation incidence angle
• Comparison with standard conditions (STC 1000 W/m2, 25°C)
• Outcome of testing: OK / NO
• Database to manage up to 30 types of photovoltaic modules
• Internal memory for data saving
• Optical/USB port for PC connection
• Help on line on display

Standard Accessories:
KITGSC4 : Set 4 cables + 4 alligator clips
KITPCMC3 : Set of 2 multi-contact one wire for MC3 connectors
KITPCMC4 : Set 2 multi-contact one wire for MC4 connectors
HT4004 : Standard clamp for  DC current up to 100A
TOPVIEW2006 : Windows software + optical/USB cable C2006
BORSA2051 : Soft carrying bag
User manual on CD-ROM
Quick reference guide
ISO9000 calibration certificate

Optional Accessories:
SOLAR-02 : Remote unit for irradiance/temperature
HT304N : Reference cell for radiation measurements
PT300N : PT1000 probe for cell temperature measurement
M304 : Mechanical inclinometer
SP-0400 : Set of straps for use of meter on neck

HT Italia PVCHECK Specifications

The post HT Italia PVCHECK PV INSTALLATION TESTER appeared first on Obiat Electronics.

Typically, modules and inverters can be positioned several tens of meters away from the PV system, forcing the operator to carry out measurements in different places far from each other at the same time.

To carry out these operations, connections can be made by means of long cables or via radio connections, but both these solutions are not ideal.  Cables could hamper the operator’s movements or be a hindrance, while radio waves would be weakened by floors, reinforced concrete or metal structures, making communication impossible!

In order to avoid the above-mentioned problems HT Italia SOLAR300N is provided with a remote unit which is synchronised with the main unit. The remote unit is positioned next to the PV modules and it is connected there; it measures the environmental parameters needed (irradiation and temperature) making measurements comfortable and safe.

Useful Accessories and Software

MPP 300 increases the impressive features of SOLAR I-V by enabling recordings on the following PV systems:

Single/three-phase, single/multi-string (up to three strings), single-inverter and multi-inverter.

The management software TopView allows you to create professional reports, which can be customised by adding the company’s logo, the customer’s data, comments, etc.

HT Italia SOLAR300N Functions:

• DC/AC TRMS (single-phase and three-phase) current measurement
• DC/AC (single-phase and three-phase) power measurement
• AC (single-phase and three-phase) energy measurement
• DC Measurement of power factor (cosphi) single-phase and three-phase
• Measurement of solar irradiation [W/m2]
• Measurement of temperature by means of probe PT1000
• Recording of voltage and current harmonics up to the 49° order
• Recording of voltage anomalies (dips, peaks)
• Flicker analysis in compliance with standard EN50160
• Recording of starting currents with a resolution of 10ms
• Recording of voltage fast transients (spikes) with a resolution of 5us
• Complete analysis of mains quality in compliance with standard EN50160
• Numerical and graphical display of each quantity
• Recalling results on the display
• TFT colour display with touch screen
• Power supply with rechargeable Li-ION battery
• Memory extension by means of compact flash (CF card)
• Data transfer to external USB memory (memory stick)
• USB port for PC connection
• Help on line at display

HT Italia SOLAR300N Specifications:

The post HT Italia SOLAR300N Solar Installation Efficiency & Power Quality Analyzer appeared first on Obiat Electronics.

HT Italia I-V400W IV Curve tracer of Solar PV strings and modules is the ideal solution for the ordinary and scheduled maintenance of photovoltaic systems. Measures, together with the IV characteristic of the device being tested, also the values of its temperature and incident irradiation.

The HT Italia I-V400w I-V curve tracer is the ideal solution for the ordinary and scheduled maintenance of photovoltaic systems. With the HT Italia I-V400w I-V curve tracer, searching for possible failures and problems in systems is extremely rapid, efficient and intuitive. The HT Italia I-V400w I-V curve tracer carries out the field measurement of the IV characteristic and of the main characteristic parameters both of a single module and of module strings. The instrument measures, together with the IV characteristic of the device being tested, also the values of its temperature and incident irradiation.
The acquired data are then processed to extrapolate the IV characteristic at standard test conditions (STC) in order to proceed with the comparison with the nominal data declared by the modules’ manufacturer, thus immediately determining whether or not the string or the module being tested respects the characteristics declared by the manufacturer. Output current or voltage from the module or string is measured with the 4-terminal method, which allows extending the measurement cables without requiring any compensation for their resistance, thus always providing accurate and precise measures.
In its internal memory, HT Italia I-V400w I-V curve tracer manages a database of photovoltaic modules, which can be updated at any time both via the management software and directly on the instrument. Together with the measurement of the IV characteristic and the extrapolation of the characteristic at standard test conditions, IV 400 compares the obtained values with the values declared by the manufacturer, immediately providing the OK / NO result of the test. The operator must not do any calculation, nor any difficult operation. The instrument carries out the comparison rapidly and automatically

HT Italia I-V400w High Lights:

Measurement of output voltage from module/string up to 1000V DC
Measurement of output current from module/string up to 15A DC
128 I-V curve points in Std or Capacitive mode
Measurement Voc-Isc-Pmax-Vmpp-Impp-Fill Factor
Measurement of solar irradiation [W/m2] with reference cell
Measurement of temperature, automatic or by means of probe PT1000
Measurement of output DC and nominal power from module/string
Numerical and graphical display of I-V characteristic
Measurement of the resistance of photovoltaic module series
Mechanical inclinometer for incidence angle of solar irradiation
4-terminal measuring method
Comparison with standard conditions (STC 1000 W/m2, 25C)
Evaluation of testing result: OK / NO
Management of up to 30 types of modules in the internal database (up to 30.000 upgradeable by software)
Internal memory for data saving
Recalling results on the display
Optical/USB port for PC connection
Help on line on the display

KITGSC4 : Set 4 cables + 4 alligator clips
KITPVMC3 : Set of 2 adapters MC3 compliance
KITPVMC4 : Set of 2 adapters MC4 compliance
HT304N : Reference cell for radiation measurements
M304 : Mechanical inclinometer
TOPVIEW2006 : Windows software + optical/USB cable C2006
BORSA2051 : Soft carrying bag
ISO9000 calibration certificate
User manual

The post HT Italia I-V400w I-V Curve tracer for PV installations appeared first on Obiat Electronics.

Current and voltage measurement at modules/strings output is measured with the 4-terminal method, which allows extending possible measuring cables without considering any compensation of their resistance, thus obtaining always precise measurements. At the end of the test, the display of I-V curve on the screen is a clear indication about the compliance with the specifications declared by the panel manufacturer.

• Measurement of efficiency of a single-phase photovoltaic system
• Measurement of I-V Curve of a module or of a string up to 1000V/15A
• Measurement of open-circuit voltage of a module or of a string (VOC)
• Measurement of short-circuit current of a module or of a string (ISC)

HT Italia SOLAR I-Vw Functions:

The post HT Italia SOLAR I-Vw Multifunction I-V curve tracer appeared first on Obiat Electronics.