LEGRAND 4 141 50, 4 141 51 User Manual

1/4

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

2/4

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. short­circuit 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