Elektro Tipp September 2010

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Industrial Electrical Power Distribution Systems

Professional Photovoltaic Distributors

NEW

� PV Generator junction boxes� Solar inverter collectors

NEW:� PV Generator junction boxes with

string overload protection or blocking diodes

Safe product solutionsconforming to standards for

Photovoltaic plants ON-grid systems

Product information as at: 9/2010

THE ELEKTROCustomer information for electro-technical specialists 3/2010

Distribution boardsCombinable enclosure system with door up to 250 A, IP 65

DK Cable junction boxes1.5 to 240 mm

2, IP 54-67

KV Small-type distribution boards3 to 54 modules, IP 54- 65

Mi Distribution boardsup to 630 A, IP 54-65

Cable entry systems

Photovoltaik distributors that meet the standards

Construction board panelsup to 630 A, IP 44-65

R. RajeshManaging Director Hensel Electric India Pvt [email protected]

Delivery in India via Hensel authorized distributor network spanning 130 cities and industrial centers.

Delivery in South East Asia via Hensel authorized distributor network in all ASEAN countries.

New product information with the proven and tested photovoltaic solutions from Hensel!

Dear Reader,

First of all, I would like to thank all our customers and business partners for the fine support and attendance at the open-ing of our new plant on 18 June 2010 in Sriperumbudur near Chennai.

We received very many congratulations and much approval for our new domicile and we are happy that from this location we can now serve both our Indian and also our South-East Asia markets even better than before.

Mr. R. Rajesh and his staff tackled the move and all the tasks associated with the start at the new location with great energy. In the name of my family and the German management, I would like to very cordially thank everybody who contrib-uted to the successful realization of this project.

In future, also in India and the other states of South-East Asia, the utilization of solar energy for the generation of electricity will be an area of great importance. It is here that Hensel is a pioneer in the urgently necessary and safe technology of the PV Generator Junction Box. Both for the use of crystalline and also thin-film panels, there are various selection criteria for the correct overload protection required. For all the specialists, we have developed a simple flowchart how to easily and rapidly approach this subject.

We are confident that your task require-ments can also be safely and reliably solved with our product solutions.

F.G. Hensel.Managing Director Gustav Hensel GmbH & Co. KG

Please ask for the new product information "Safe product solutions conforming to standards for photovoltaic plants ON-grid systems" with the additions to the range at www.hensel.in!

Strong and long-term protection with Hensel PV Generator Junction Boxes: PV generator junction boxes,

ready for connection and wired suitable for outdoor installation, UV resistant with stainless steel external brackets for external

fixing of enclosures

protection class: II degree of protection: IP 65 rated voltage: UOC STC DC 1000 V

newnew

with DC generator disconnect switch with DC type 2 surge arrester

Mi PV 3621 12 x PV string on 1 x inverter input


newnew

PV generator junction boxes with string overload protection

DC Generator disconnect switch



newnew

PV generator junction boxes with blocking diode

DC Generator disconnect switch



newnew

with DC generator disconnect switchwith DC type 2 surge arrester



New in our range of PV generator junction boxes:

Professional protection of investments starts already with the correct choice of components ...

special attention is to be paid to the choice of suitable, efficient Photovoltaic modules and solar inverters as well as to the electri-cal protection concept.

Investors for PV systems expect long-term profits of the financial expenditures connected with the construction and running of a photovoltaic plant. In order to achieve this goal

"Now we only have to connect the panels to

the inverters!"

"Stop, don't we even have to install protection

devices here?"

Protection devices in PV Generator Junction Boxes: Investments effectively protected against harm!

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PV panel technology Blocking diode DC surge arrester

for PV plants (SPD)

Required protection device in PV generator

junction boxesDC generator disconnect switch

String overload protection

How to choose the correct overload protection for PV generator junction boxes:

Which PV panel

technology is used?

Generator junction box with blocking diodes

Generator junction box with blocking diodes and DC surge arrester for PV plants

Generator junction box with DC generator disconnect switch

Generator junction box with DC generator disconnect switch and DC surge arrester for PV plants

YES

Generator junction box with overload protection and DC generator disconnect switch

Generator junction box with overload protection, DC generator disconnect switch and DC surge arrester for PV plants

Generator junction box with blocking diodes, DC generator disconnect switch and DC surge arrester for PV plants

Generator junction box with blocking diodes and DC generator disconnect switch

Generator junction box with overload protection

Generator junction box with overload protection and DC surge arrester for PV plants

Is string

overload protection required?

Is DC generator

disconnect switch re-quired?

Generator junction box with terminals

Generator junction box with DC surge arrester for PV plants

NO Is DC surge arrester

required?

NO

YESNO

Crystalline panels

Thin-film panels

Manufacturer's instruc-tions must be checked: If thin-film panels are not re-verse current proof, blocking diodes must be used. The manufacturer indicates the number of parallel strings, for which no blocking diodes are needed.

IEC 60364 -7-712 Part 712.433.1Overload protection may be omitted to PV string and PV array cables when the continu-ous current-carrying capacity of the cable is equal to or greater than 1,25 times ISC STC at any location.(ISC STC = Short Circuit Standard Test Condition)

IEC 60364 -7-712 Part 712.536.2.2.5 A switch disconnector shall be provided on the DC side of the PV inverter.

NO

YES

Is DC surge arrester

required?

NO

Is DC generator

disconnect switch re-quired?

NO

YES

NO

YES


required?

YES

NO

YES


required?

Are blocking diodes

required?

YES

Is DC generator

disconnect switch re-

quired?

NO NO

YES


required?

YES NO

YES


required?

��Manufacturer's instruc-tions must be checked!

�Please check, if overload protection is needed, see the requirements of IEC 60364 -7-712 Part 712.433.1

��Please check, if additionally a DC generator disconnect switch must be used. This can be inte- grated already in the solar inverter!

See the requirements of IEC 60364-7-712 Part 712.536.2.2.5!

- If DC lines are wired from one lightning protection zone into another, a type 2 surge protection device (SPD) must be installed in the proximity of the feed-through for cables.

- Is an outside lightning protection installed, then also an internal overvoltage protection is necessary.

��Please check, if a surge protection device (SPD) is necessary.

Elektro Tipp September 2010

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