LEGRAND 4 141 50 User manual

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87045 LIMOGES Cedex
Telephone: [phone] – Fax: [phone]
Photovoltaic (PV) modular voltage
Photovoltaic (PV) modular voltage Photovoltaic (PV) modular voltage
Photovoltaic (PV) modular voltage
surge protectors
surge protectorssurge protectors
surge protectors
Catalogue number(s): 4 141 50/51
Catalogue number(s): 4 141 50/51Catalogue number(s): 4 141 50/51
Catalogue number(s): 4 141 50/51
4 141 50/51
CONTENTS
CONTENTS CONTENTS
CONTENTS PAGES
1. General features .................................. 1-2
2. Overall dimensions ............................. 2
3. Technical features ............................... 2
4. Conformity ........................................... 3
5. Setup ................................................... 3
6. Accessories ......................................... 3
7. Maintenance ........................................ 4
1. GENERAL FEATURES
1. GENERAL FEATURES1. GENERAL FEATURES
1. GENERAL FEATURES
1.1 Brief description
1.1 Brief description1.1 Brief description
1.1 Brief description
Type 2 voltage surge protectors for photovoltaic (PV) installations
with voltages which may reach a maximum (Uocmax) of 1200 VDC
(irrespective of the local environmental, temperature, sunlight, etc.
conditions).
Specifically designed to protect the DC part of PV installations
(PV panels and inverters)
- Based on the use of non-polarised panels (panels which do
not require their active conductors to be earthed)*
- Without energy storage system (e.g. batteries, etc.)
Equipped with draw-out replacement cassettes with LED indicators (red
LED: cassettes need to be replaced).
* Please contact us for installations with polarised panels
1.2 Use
1.2 Use 1.2 Use
1.2 Use
1.2.1 Legrand recommendations
1.2.1.1 Protection of the DC part of the PV installation
To provide correct voltage surge protection of the DC part of the
PV installation, a PV voltage surge protector is recommended:
- On each inverter input
(1)
(in the DC enclosures in accordance with
guide UTE C 15-712-1, voltage surge protector compulsory according
to the type and location of the installation to be protected, see
UTE C 15-712-1)
- Close to the panels (in the group junction boxes according to guide
UTE C 15-712-1) when they are more than 10 m away from the
inverter or the DC enclosure
(2)
(1)
For multi-input inverters or multi-MPPT, it is advisable to use a
voltage surge protector on each input
(2)
PV generators with a Uocmax voltage of less than 600 V:
According to guide UTE C 15-712-1, this protection is only necessary
if Legrand 600 V voltage surge protectors are installed close to the
inverters. However this protection is recommended for widespread
PV installations with very long lines.
1.2.1.2 Protection of the AC part of the PV installation
Likewise, for correct protection of the AC part of the
PV installation, it is advisable to group the inverters together in
the same equipment room as the main panel (main LV distribution
board) connecting the PV installation to the LV distribution
system. Thus a single AC voltage surge protector
(1)
is all that is
necessary to protect the main LV distribution board (voltage surge
protector compulsory according to the type and location of the
installation to be protected, see UTE C 15-712-1).
If the inverters are not installed in the equipment room in which the
main LV distribution board is located (or are installed out of doors) an
AC voltage surge protector is also necessary close to each inverter.
Recommended types of AC voltage surge protector:
Power of the
PV installation
Main LV board prot.
Installations with
lightning conductors (3)
Main LV board prot.
Installations w/out
lightning conductors
Protection
close to
inverters (2)
P < 36 kWc Type 1
(Iimp 12.5 kA) protected
v. surge protector protected v. surge protector
P < 100 kWc Type 1
(Iimp 25 kA) Type 2
(Imax 70 kA) Type 2
(Imax 15 kA)
P > 100 kWc Type 1
(Iimp 25 kA) Type 1
(Iimp 25 kA) Type 2
(Imax 40 kA)
(1)
An additional AC voltage surge protector is also necessary close
to each inverter that is more than 10 m away from the main LV
distribution board. This voltage surge protector must be the same
type as those used close to the inverters (see above table).
(2)
AC voltage surge protectors necessary close to each inverter that is
- More than 10 m away from the main LV distribution board
- Installed out of doors or outside the equipment room in which
the main LV distribution board is installed
(3)
When a PV installation is protected by lightning conductors, it is
advisable to create an isolated lightning protection system (isolated
LPS) as described in standard NF EN 62305, maintaining adequate
separation distances between the metal structures of the panels and
the LPS (lightning conductors and downcomers).
1.2.1.3 Protection of the AC part of the existing installation
(consumption part)
To ensure correct voltage surge protection of the whole installation
(PV installation and installation on the consumption side), it is
advisable to protect the AC installation on the consumption side so
as to avoid any possible risk resulting from overvoltage on the
PV installation or overvoltage from the distribution system.
Technical data sheet: F01271EN/00 Updated on: Created on: 13/01/2012

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Photovoltaic (PV) modular voltage
Photovoltaic (PV) modular voltage Photovoltaic (PV) modular voltage
Photovoltaic (PV) modular voltage
surge protectors
surge protectorssurge protectors
surge protectors
Catalogue number(s): 4
Catalogue number(s): 4Catalogue number(s): 4
Catalogue number(s): 4
141 50/51
141 50/51141 50/51
141 50/51
Since the two electrical installations generally have a common
earthing system, voltage surge protectors are recommended on both
installations to avoid any possible problem of equipotentiality or
feedback from earth.
The voltage surge protectors must be the same type as the AC
voltage surge protectors recommended for AC protection of the
PV installation (see § 1.2.1.2). The voltage surge protectors for the
secondary enclosures must be the same type as those
recommended for protection close to the inverters
(table above in § 1.2.1.2).
See also the technical data sheets for T1 and T2 voltage surge
protectors for 230/400 V~ systems
1.2.2 Guide UTE C 15-712-1
According to this guide, the use of PV voltage surge protectors for
protection on the DC side is compulsory:
- If lightning conductors are present
- According to the analysis of the risk of lightning* (according to the
distance between panels and inverter and the local lightning strike
density)
The use of AC voltage surge protectors is compulsory on the AC
side:
- If lightning conductors are present
- If the local lightning strike density is greater than 2.5
Note: The use of voltage surge protectors is generally also
compulsory if an analysis of the risk of lightning has been carried out
according to standard NF EN 62305 (IEC 62305). In this case, refer
to §1.2.1.2 and the previous table taking into consideration the
installation equipped with lightning conductors and incorporating all
the necessary protection close to the equipment.
*Given the expense of panels and inverters, it is highly
recommended that voltage surge protectors are systematically
installed.
2. OVERALL DIMENS
2. OVERALL DIMENS2. OVERALL DIMENS
2. OVERALL DIMENSIONS
IONSIONS
IONS
3. TECHNICAL FEATURES
3. TECHNICAL FEATURES3. TECHNICAL FEATURES
3. TECHNICAL FEATURES
Positioning for operation:
Positioning for operation:Positioning for operation:
Positioning for operation:
Vertical operating position
Fixed on 35 mm DIN rail
Supply via the top
Catalogue numbers 4141 50 4141 51
Reference voltage (Uocstc) 600 V(DC) 1000 V(DC)
Max. voltage (Ucpv) 720 V(DC) 1200 V(DC)
Voltage surge protector type Type 2
Number of protected poles 2
Protection method Y (1)
Nominal current (In: 8/20 wave) 20 kA
Max. discharge capacity (Imax: 8/20 wave) 40 kA
Level of protection (Up) at In (20 kA) 2.4 kV 4 kV
Max. operating current (Iscpv) 125 A (2)
Max. line current (IL) 40 A
Residual current at Ucpv (Ipe) < 1 mA
Response time 25 ns
Max. terminal capacity
(flexible conductor with cable ends/rigid
conductor) 25/35 mm²
Number of ports 1
Location category Internal
Installation method Permanent
Number of modules 3
Degree of protection IP 20/IK 04
Degree of pollution 2
Usage temperature -25°C to +60°C
Storage temperature -25°C to +60°C
(1)
Protection method Y: +/- protection, +/earth and -/earth
(2)
Maximum current that the PV voltage surge protector can withstand in
the event of end-of-life short-circuit without adding any external
protection, irrespective of the local environmental, temperature, sunlight,
etc. conditions. This value must always be greater than the max. short-
circuit current of the PV generator (1.25 Iscstc)
Enclosure materials (base and cassettes):
Enclosure materials (base and cassettes):Enclosure materials (base and cassettes):
Enclosure materials (base and cassettes):
Moulded plastic housing
conforming to fire test UL94 V0
Self-extinguishing.
Heat and fire resistance according to standard EN 60898-1, glow-wire
test at 750°C for 30 s.
Technical data sheet: F01271EN/00 Updated on: Created on: 13/01/2012

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Photovoltaic (PV) modular voltage
Photovoltaic (PV) modular voltage Photovoltaic (PV) modular voltage
Photovoltaic (PV) modular voltage
surge protectors
surge protectorssurge protectors
surge protectors
Catalogue number(s): 4 141 50/51
Catalogue number(s): 4 141 50/51Catalogue number(s): 4 141 50/51
Catalogue number(s): 4 141 50/51
4. CONFORMITY
4. CONFORMITY4. CONFORMITY
4. CONFORMITY
Conforming to guide UTE C 61-740-51.
Complies with the installation obligations and recommendations of
guides UTE C 15-712-1 and UTE C 61-740-52 and standard
IEC 60364-7-712.
Conforms to Directive 2006/95/EC of 12.12.06
5. SETUP
5. SETUP 5. SETUP
5. SETUP
5
55
5-
--
-1 General principle
1 General principle 1 General principle
1 General principle
Voltage surge protectors must not be installed in locations where
there is a risk of fire or explosion without special provisions. They
must be disconnected before checking the insulation resistance of
the installation.
Connections according to § 5.2: voltage surge protector connected
to the mains supply and to the protective conductor (PE) using as
short a connection as possible (< 50 cm).
Electromagnetic compatibility rules: avoid loops, fix the cables
firmly against the exposed metal conductive parts.
Compulsory connection of the earth terminal on the voltage surge
protector to the protective conductor (PE) on the distribution panel.
Equipotentiality rules: interconnection of the exposed conductive
parts of the equipment and the protective conductor (PE) on the
distribution panel, which is itself linked to the earth terminal of the
voltage surge protector (see § 5.2.2).
5
55
5-
--
-2 Connections
2 Connections2 Connections
2 Connections
5.2.1 Connections on the PV voltage surge protector
Connection cross
Connection crossConnection cross
Connection cross-
--
-sections and lengths to be stripped
sections and lengths to be strippedsections and lengths to be stripped
sections and lengths to be stripped
Permitted conductors
- Flexible
- Rigid
4 to 25 mm²
6 to 35 mm²
Tools required
- Flat screwdriver
- PZ Phillips screwdriver
Ø4 to 5.5 mm
PZ2
Tightening torque
- Min.
- Max.
- Recommended
1.7 Nm
3.5 Nm
2.5 Nm
5.2.2 Connection and equipotentiality of the earths in the
PV installation
Equipotentiality of all the earths is essential to ensure correct voltage
surge protection of the whole PV electrical installation and the
consumption part.
Check that the earth connection to which the exposed conductive parts
of the installation are connected complies with standard NF C 15-100
(IEC 60364).
5
55
5-
--
-3 Associated protection
3 Associated protection3 Associated protection
3 Associated protection
No external associated protection is necessary for currents below 125 A.
5
55
5-
--
-4 Cascade installation of voltage surge protectors
4 Cascade installation of voltage surge protectors 4 Cascade installation of voltage surge protectors
4 Cascade installation of voltage surge protectors
When the panels are more than 10 m away from the inverter (from the
DC enclosure incorporating the DC voltage surge protector protecting
the inverter), DC voltage surge protection is also recommended close to
the panels (see 5.2)
6. ACCESSORIES
6. ACCESSORIES 6. ACCESSORIES
6. ACCESSORIES
6.1 Draw
6.1 Draw6.1 Draw
6.1 Draw-
--
-out replacement cassettes
out replacement cassettesout replacement cassettes
out replacement cassettes
With LED indicators:
- Green: voltage surge protector operational
- Red: cassette needs to be replaced
Cat. No. For voltage surge protector
4141 50 4141 80
4141 51 4141 81
Replacement of cassettes: see § 7-2
Technical data sheet: F01271EN/00 Updated on: Created on: 13/01/2012
See
Wiring of the earths
:

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Photov
PhotovPhotov
Photov
oltaic (PV) modular voltage
oltaic (PV) modular voltage oltaic (PV) modular voltage
oltaic (PV) modular voltage
surge protectors
surge protectorssurge protectors
surge protectors
Catalogue number(s): 4141 50/51
Catalogue number(s): 4141 50/51Catalogue number(s): 4141 50/51
Catalogue number(s): 4141 50/51
7. MAINTENANCE
7. MAINTENANCE7. MAINTENANCE
7. MAINTENANCE
7.1
7.1 7.1
7.1 Checking the insulation resistance of the installations
Checking the insulation resistance of the installationsChecking the insulation resistance of the installations
Checking the insulation resistance of the installations
Disconnect the voltage surge protectors (remove the cassettes)
before checking the insulation resistance of the installation.
7.2
7.2 7.2
7.2 Replacement of the cassettes
Replacement of the cassettes Replacement of the cassettes
Replacement of the cassettes
Recommendation:
The installation must not be switched back on (DC/AC) without the
cassettes fitted.
Technical data sheet: F01271EN/00 Updated on: Created on: 13/01/2012
Replace all 3 cassettes
Cat. No.