LEGRAND 4146 81 Instruction manual

Technical data sheet: F01248EN/01 Updated on: Created on: 13/01/2012
1/5
Catalogue number(s): 4146 81/82
87045 LIMOGES Cedex
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Modular fuse carriers for
photovoltaic applications
CONTENTS PAGES
4. Materials
3. Technical features
6. Conformity
2. Overall dimensions
7. Setup
1. General features
2
1
2
1
1
414 681 414 682
1. GENERAL FEATURES
1-1 Brief description
- Single pole (1P) and 2-pole (2P) photovoltaic (PV) fuse carrier
for isolating and protecting DC circuits from PV panels for
applications up to 1000 V.
- For 10 x 38 mm cylindrical fuses
- Supplied with dividers (4146 82) and safety labels:
“Do not operate under load”
1-2 Use
- Use recommended according to recommendations in guide
UTE C 15-712-1
- Use with fuses specifically designed for the DC side of
PV applications
Recommended use:
- 1P fuse carrier: For installations with polarised PV panels
(with earthing of one of the polarities), protection of the poles
not connected to earth for each PV string
- 2P fuse carrier: For protection of both poles of each string
of non-polarised PV panels
2. OVERALL DIMENSIONS
2. OVERALL DIMENSIONS (continued)
8. Maintenance
9. Accessories
2-3
3-4
4-5
3. TECHNICAL FEATURES
Operating voltage (Ue)*
Degree of pollution 2
Usage temperature
Storage temperature
-5°C +40°C
Mechanical performance
1000 V
Operating current (le)
Number of protected poles
20 A
1
Max. short-circuit current
(Isc)
Rated impulse withstand
voltage Uimp
50 kA
6 kV
Protection
4146 81 4146 82
1000 V
20 A
2
50 kA
6 kV
2
-5°C +40°C
-25°C +70°C -25°C +70°C
IK04 IK04
IP2X IP2X
2 poles
35.5
1 pole
17.7B
Utilisation category DC 20B DC 20B
5. Installation 2
Do not open
under load Do not operate under load
2013-07-02

Catalogue number(s): 414 681/82
Modular fuse carriers for
photovoltaic applications
2/5
4. MATERIALS
Housing Reinforced
polybutylene
terephthalate
Density
Max. tensile stress
Bending modulus
Glow-wire
Oxygen index
Colour
Copper with silver track
Zinc-plated bichromate steel
Contacts
Screws
1.62 to 1.70
Grey
RAL 7035
960°C/5 s
> 9.50 GPa
> 100 MPa
> 30
Mounting: - On EN 50.022 or EN 60.715 symmetrical rail
- With Ø 3 screws on plate at each end with clips
disengaged
Power supply: Via the top or the bottom
Operating position: Vertical or horizontal or side
Subject to use fuses Legrand brand
Connection: “Solar” cables
Mounting:
Permitted conductors
- Flexible with cable ends
- Flexible
1P/2P
Tools required
-
- Phillips screwdriver
Flat screwdriver
Tightening torque
- Min.
- Max.
- Recommended
-
1.5 to 10 mm²
4 to 10 mm²
-
Ø 4 to 5.5 mm
PZ2
-
1.8 Nm
3 Nm
2.2 Nm
Cage terminals, with pozidriv mixed disengageable
and captive screws
6. CONFORMITY
Products conform to standards:
- EN/IEC 60269-1
- EN/IEC 60947-3: classification DC20B
(Do not operate under load)
Comply with the installation obligations and recommendations
of standard NF C 15-100 and guide UTE C 15-712-1
7. SETUP
7-1 General principle
7-1-1 Installations with non-polarised PV panels
For PV installations based on the use of non-polarised panels,
neither of the polarities of the panels is connected to earth.
Both the polarities of the panels must be protected.
5. INSTALLATION
Created on: 13/01/2012Technical data sheet: F01248EN/01 Updated on: 2013-07-02
5. INSTALLATION (continued)
3-1 APPARATUS DOWNGRADING
It can be justified to downgrade the apparatus when the conditions
of use become more hard :
- Room temperature higher than 35° C : To downgrade the fuse
of a grade by 10° C (UTE guide C 20-051, NF IEC 60 943,
guide to over heating)
- Juxtaposed apparatus and simultaneous operations
To apply to the base rated current the corresponding coefficient :
Number of juxtaposed poles Coefficient
1 - 2 or 3 pôles 1
4 - 5 or 6 pôles 0,8
7 - 8 or 9 pôles 0,7
10 pôles and more
(NF C 63-421 / NF EN 60439-1, table 1)
0,6
Permanent mode (more than 8 hours per day) : It can be
to downgrade the base of a size.

Catalogue number(s): 414 681/82
Modular fuse carriers for
photovoltaic applications
3/5
Created on: 13/01/2012
Cat. No. 4 063 07 or 10 mm min.
- 2-pole fuse carrier
7-3 Connections
7-4 Labelling and safety markings
In accordance with guide UTE C 15-712, a “do not open under
load” label must be affixed to the fuse carriers
1P fuse carrier
String number
..
Do not open
under load
Technical data sheet: F01248EN/01 Updated on: 2013-07-02
7-1-2 Installations with polarised PV panels
For PV installations based on the use of polarised panels,
one of the polarities of the panels is connected to the earth
of the installation (in accordance with the recommendations
of the manufacturers of the PV panels)
For each string of polarised panels, the conductors must be
protected as follows:
- Conductors not connected to earth: protection by single pole
fuse carrier
- Panels with direct connection to earth (direct earthing with no
intermediate resistor): protection of all these conductors with a
single fuse and a single pole fuse carrier
Cables connected to earth:
Polarised panels must be earthed at a single point for all the
conductors of the PV generator (PV strings associated with the
same inverter or the same MPPT). This point must be located
upstream of the inverter's breaking and isolating device
(isolating switch) in order to maintain the earthing of the panels
even during maintenance of the inverter and the panels.
The cross-section of the earthing conductor must be
appropriate for the protection device breaking the fault current
(min. 4 mm² copper or equivalent). The rating of the protection
device must be chosen according to the technology of the
PV modules and the area of the PV array.
7-2 Usage limits
Single pole fuse carrier
Cat. No. 4 063 07 or 10 mm min.

Catalogue number(s): 414 681/82
Modular fuse carriers for
photovoltaic applications
4/5
Maintenance on panels
9. ACCESSORIES
9-1 Padlocking accessory Cat. No. 057 99
Ø5 mm padlock Cat. No. 4 063 13
Ø6 mm padlock Cat. No. 227 97
Ø 4
Ø 4 to 6
➊
➋
➌
➊
➋
9-2 Separation module (0.5 module)
Cat. No. 4 063 07
Created on: 13/01/2012Technical data sheet: F01248EN/01 Updated on: 2013-07-02
- 2P fuse carrier
8. MAINTENANCE
Replacement of fuses
String number
Do not operate under load

Catalogue number(s): 414 681/82
Modular fuse carriers for
photovoltaic applications
5/5
9-7 Universal prong-type busbars 4 049 26/37
Can be used up to 1000 V to group together strings of
photovoltaic panels with same polarity on the DC side with
single pole fuse carriers Cat. No. 4146 81.
Note: The ends of the busbars must be equipped with the
protection accessory Cat. No. 4 049 89.
Insert a spacing module Cat. No. 4 063 07 between
2 consecutive units with different polarities.
CLICK
12
9-6 Pole separation divider
Cat. No. 4 063 05
Cat. No. 4 063 07 or 10 mm min.
4 049 05
Created on: 13/01/2012Technical data sheet: F01248EN/01 Updated on: 2013-07-02
9-5 Joining assembly
2-pole Cat. No. 057 92
3-pole Cat. No. 057 93
4-pole Cat. No. 057 94
9-4 Auxiliary
➊
➋
➌
➍
➊
➋
➌
➍
➎
9-3 Sealable screw cover (4 separable poles) Cat. No. 4 063 04
N/C + N/O early break and signalling auxiliary
5 A – 250 V (0.5 module)
Cat. No. 057 96
Cat. No. 4 063 04