Since 1984, Altech Corporation has grown to become a leading supplier of automation and
industrial control components. Headquartered in Flemington, NJ, Altech has an experienced
staff of engineering, manufacturing and sales personnel to provide the highest quality products
with superior service. This is the Altech Commitment!
With experienced Product Engineers and Customer Service personnel, Altech provides solu-
tions to your most pressing application challenges. All with one thought in mind - to ensure that
we solve your problem the first time!
Quality Commitment
Altech’s control components meet diverse national
and international standards such as UL, NEC, CSA,
IEC, VDE and more. Altech provides superior cus-
tomer service and delivery through Total Quality
Management and Continuous Process Improve-
ment. Altech is ISO 9001 approved. We perform
these services with honesty and integrity and are
committed to achieve these goals.
PV Protection
Table of Contents
Introduction.......................................................................................................4-5
Cylinder Fuses
CH 10x38 gPV...............................................................................................6-7
CH 10x85 gPV...............................................................................................8-9
CH 10x38 PV.............................................................................................10-11
CH 14x51 gPV................................................................................................ 12
Fuse Holders
EFH 10 DC and EFH 14 DC ......................................................................14-15
NH Type Blade Fuses
DC 1000V..................................................................................................16-17
DC 1000V gPV...........................................................................................18-19
DC 1100V..................................................................................................20-21
DC 1100V gPV...........................................................................................22-23
DC 1500V..................................................................................................24-25
Fuse Bases
PK XL.........................................................................................................26-27
U1...3/GZ/1500/H........................................................................................... 28
PK0, 1, 2, 3 DC............................................................................................... 29
U1-1/GZ/PV.................................................................................................... 30
Fuse Disconnector
TL1-1/9/1000V/PV.......................................................................................... 31
TL1,3-1/9/120V .............................................................................................. 32
NH Handle ...................................................................................................... 33
Relays for Photovoltaic Systems
RS35 and RS50.............................................................................................. 33
Index.................................................................................................................... 34
Terms and Conditions ......................................................................................... 35
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • 908.806.9400 • 908.806.9490 (fax) • www.altechcorp.com
3
PV Protection
INTRODUCTION
Altech Corp.®
provides high-quality solutions for the complete overcurrent
and overvoltage protection of applications in the field of photovoltaic and
other renewable energy sources. Our products are designed for complete
protection of:
•
DC circuits (overvoltage protection and reverse current protection)
•
Circuits inside DC/AC inverters (semiconductor protection)
•
AC circuits between the inverter and the power grid
(overvoltage, overcurrent and anti-islanding protection).
The products are internationally certified and carry several quality marks.
DC - DISTRIBUTION AND PROTECTION COMPONENTS
Photovoltaic systems are composed by photovoltaic panels, cables, fuses, switches, 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 cable and panel against "reverse" overcurrent.
Overcurrent Protection
PV module protection from DC REVERSE current on DC side Array with three or more strings of panels. PV systems
that have three or more strings connected in parallel need to have the positive string protected by fuses. Systems
that have less than three strings will not generate enought fault current to damage the conductors/solar panels.
Normaly in North America there is a gPV fuse connected on the positive string, 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.
PV module protection from AC REVERSE current caused by defective inverter If an inverter becomes defective
(transformerless…), AC reverse current can feed into DC strings and destroy PV modules.
4
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • 908.806.9400 • 908.806.9490 (fax) • www.altechcorp.com
PV Protection
INTRODUCTION
CH 10 gPV Fuse Selection
Define panel data:
• I
SC
(string)
• U
OC
(STC) -
NO
Does string number
exceed 2?
open circuit voltage
at standard conditions
No gPV string
fusing required
• Number of panels
• Number of strings
YES
gPV string fuse
≥ 1.4 xl
SC
(panel)
gPV string fuse Un ≥ 1.2 x U
OC
(STC)
(panel) x number of panels
Derating factor 1.4 is defined for ambient temperature
maximum 45°C . Cable cross-section derating factor
is not included!
Apply gPV string
fuse to + string
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • 908.806.9400 • 908.806.9490 (fax) • www.altechcorp.com
5
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