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CONTENTS
Photovoltaic (PV) modular SPDs
Technical data sheet: F01271EN_01
Updated:
Created: 31/10/2017
Cat. No(s): 4 141 55/56/85/86
4. POSITIONING, CONNECTION (continued)
4.4 Maintenance
Checking the installation insulation resistance
Disconnect the SPDs (remove the cassettes) before checking the
installation insulation resistance.
Module maintenance
A modular SPD can be replaced without disconnecting the other
products.
Put the latch clip in
the unlocking position.
Tilt the device forward
and release the upper
hook from the rail
Associated protection device
No external associated protection is necessary for currents below 125 A
(4 141 56) and 50 A (4 141 55).
Installing cascaded SPDs
When panels are more than 10 m away from the inverter (from the DC
enclosure incorporating the DC SPD protecting the inverter), a DC SPD
is also recommended close to the panels (see section 4.5 and 4.6).
Connection
. IP20 protected terminals, with wired device
. Cage terminals with quick release captive screws
. Terminals fitted with flaps preventing a cable being placed under
the terminal, with the terminal partly open or closed
. Terminal depth: 14 mm
Connection cross-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 6.5 mm
PZ2
Tightening torque
- min.
- max.
- recommended
2.5 Nm
3.0 Nm
2.7 Nm
4. POSITIONING, CONNECTION (continued)
4.5 Connecting the PV SPD
4.6 Earth connections and equipotentiality 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 exposed conductive parts in
the installation are connected complies with standard NF C 15-100
(IEC 60364).
0.5 m
0.5 m
0.5 m
0.5 m
0.5 m
0.5 m
0.5 m