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The lowest acceptable wire section and the
corresponding maximum cable or conductor length
for multiple core cable or H07 RN-F, at rated current
(20 A), for a voltage drop e lower than 5% and at a
power factor of 0.80, are respectively 2.5 mm² and
144 m. In case electric motors must be started,
oversizing the cable is advisable.
The voltage drop across a cable can be determined as
follows:
e = Voltage drop (V)
I = Rated current (A)
L = Length of conductors (m)
R = Resistance (
Ω
/km to VDE 0102)
X = Reactance (
Ω
/km to VDE 0102)
3.3.3
Connecting the load
3.3.3.1
Site distribution panel
If outlet sockets are provided, they must be mounted
on a site distribution panel supplied from the terminal
board of the generator set and in compliance with
local regulations for power installations on building
sites.
3.3.3.2
Protection
– Check whether frequency, voltage and current
comply with the ratings of the generator set.
– Provide a load cable, without excessive length,
and lay it out in a safe way without forming coils.
– Open the door of the control and indicator panel
and the transparent door in front of the terminal
board X10.
– Provide the wire ends with cable lugs suited for
the cable terminals.
– Loosen the cable clamp and push the wire ends of
the load cable through the orifice and clamp.
– Connect the wires to the proper terminals (L1, L2,
L3, N and PE) of X10 and tighten the bolts
securely.
– Tighten the cable clamp.
– Close the transparent door in front of X10.
e
3 I L
R
ϕ
cos
⋅
X
ϕ
sin
⋅
+
(
)
⋅ ⋅ ⋅
1000
------------------------------------------------------------------------------
=
For safety reasons, it is necessary to
provide an isolating switch or
circuit breaker in each load circuit.
Local legislation may impose the use
of isolating devices which can be
locked.
!
