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PV photovoltaic systems

Overcurrent and overvoltage protection

gPV fuses

Green protect

ETI Elektroelement d.d.

Obrezija 5, SI - 1411 Izlake

Slovenia

Phone: + 386 03 56 57 570

Faks: + 386 03 56 74 077

eti@eti.si

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PV photovoltaic systems

Overcurrent and overvoltage protection

Introduction

Photovoltaic systems are composed by photovoltaic

panels, cables, fuses, overvoltage arresters and power

inverter. Photovoltaic panels utilise the power of sun light

to converters photons to DC current.

Electricity generated by solar panels is then fed into a

power inverter that converts DC current to AC current. gPV

fuse has been developed to protect against overcurrent.

ETITEC B, C-PV series of over voltage surge protective

devices has been developed to protect against direct and

indirect lightning discharges and is intended to protect

photovoltaic systems.

The circuit topology consists of two varistors stages each

protected by a thermal disconnection device.

Overcurrent protection

Array with three or more strings of panels:

PV systems that have three or more strings connected in

parallel need to have each string protected by fuses.

Systems that have less than three strings will not generate

enought fault current to damage the conductors/solar

panels.

Normaly there are two gPV fuses connected on each string

( + and - pole ), that protect conductors/solar panels

from damage and eliminate any safety hazards.

Fuses isolate the faulted string. The rest of PV system can

continue to generate electricity.

2

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CH 10 gPV fuse selection

Deine panel data:

Does module

number in

protected string

exceed TWO?

NO

-I sc (string)

-U n (panel)

-number of panels

-number of strings

No gPV string fusing

required

YES

gPV string fuse In ≥ 1,4 xI sc

(panel)

gPV string fuse Un ≥ 1,2

x U n (panel) x number of

panels

Apply gPV string fuse

to + and - pole of string

NH gPV fuse selection

Deine panel data:

NH PV fuse I n ≥ 1,5 x I sc

(panel) x number of strings

NH PV fuse U n ≥ 1,2 x U n

(panel) x number of panels

-I sc (panel)

-U n (panel)

-number of panels

-number of strings

Apply NH PV fuse

to + and - pole of string

3

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CH 10 gPV - Fuse-links

General characteristics

Rated voltage

1000V d.c. L/R=2ms

Breaking capacity

30kA d.c.

Standards

Draft of IEC 60269-6 (32B/543/CD)

Application

For protection of photovoltaic modules.

CH 10 gPV

Pre-arcing

Joule

integral

[A 2 s]

L/R=2ms

Operating

Joule

integral

[A 2 s]

L/R=2ms

Power

dissipation

[0,7 x I n ]

P d [W]

Power

dissipation

[I n ]

P d [W]

I n

[A]

Weight

[g]

Packaging

[pcs]

Size

Code No.

2

002625101

1,3

3,5

0,47

1,00

4

002625102

3,3

28

0,52

1,25

6

002625103

5,5

45

0,73

1,65

8

002625104

8

62

0,93

1,9

10

002625105

11

88

1,06

2,3

10

10/500

12

002625106

23

180

0,82

1,89

16

002625107

35

270

1,00

2,5

20

002625108

50

430

1,18

3,25

25* 002625109

75

620

1,25

3,45

* 900V d.c.

Ø 10,3 + / - 0,1

CH 10 gPV I/t characteristics

ETI as one of the most important European producer of overcurrent protection equipment

and devices participating in many working groups for standards developement at

International Electrotechnical Commission (IEC). ETI is member of maintenance team

MT9 belonging to the 32B group, working on the part 6 of the IEC 60269 dealing with

supplementary requirements for fuse-links for the overcurrent protection of solar

photovoltaic energy systems.

4

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PCF 10 DC - Fuse disconnector

General characteristics

Rated voltage 900V d.c. 1000V d.c.

Rated current max. 25A max. 20A

Max. fuse link power dissipation 3 W

Cross section of connecting wire 0,5 mm 2 - 10 mm 2 (AWG 8-20 solid)

Pole build-in width

18 mm

Mouting on the rail

EN 60715

Utilization category

DC-20B

Standards Fuse-links

IEC 60269-2:2006 UL 284-4

Standards - Fuse disconnector

IEC 60947-1 Ed. 4.0 EN 60947-1:1999+A1+A2

IEC 60947-3 Ed. 2.1 EN 60947-3:1999+A1:2001

PCF 10 DC

Number of

poles

U e /U i

[V]

I max.

[A]

Weight

[g]

Packaging

[pcs]

Code No.

Indicator

1P

900

25

002550301

-

58

12/336

2P

900

25

002550303

-

120

6/168

1P

900

25

002550311

LED

58

12/336

2P

900

25

002550313

LED

120

6/168

1P

1000

20

002550201

-

58

12/336

2P

1000

20

002550203

-

120

6/168

1P

1000

20

002550211

LED

58

12/336

2P

1000

20

002550213

LED

120

6/168

Fuseholder for 10,3 x 38mm fuse links

Fuseholder for 10,3 x 38mm fuse links

Packaging

[pcs]

Code

Type

Weight(g)

006710335

HK10383

1

250

Dimensions [mm]

Type

A

B

C

D

E

F

G

H

HK10383

12,3

9,8

19,0

2,0

2,0

0,75

11,0

4,0

Fixing to be soldered

5

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