5.5.3
Line protection fuse
The connection must be fused depending on the used cable, the type of routing, the operating
conditions and according to the standards applicable on site. The speci
fi
cation for the maximum
admissible line fuse of the device must be observed (see technical data).
Possible components for the line protection (recommendation):
•
Safety fuses of operating class
“
gG
”
(whole range fuse cartridges for general applications according
to EN 60269-1).
•
Line protection switch with characteristic
“
C
”
(according to EN 60898-1).
5.5.4
Operating in IT-System
Danger due to electric current
•
In the IT-System the neutral point of voltage supply is not grounded; in the case of a short-circuit
between a phase (e.g.
“
L1
”
) and protective earth
“
PE
”
becomes the protective earth potential =
phase.
•
Between the connection of the voltage supply of the device and the protective earth
“
PE
”
is in no
case a higher voltage permissible than the indicated line voltage of the device!
1 ~ types can be used in IT-System in standard version. These may only be used in 3 ~ IT-Systems if
no higher voltage to the
“
PE
”
can occur than the speci
fi
ed mains voltage of the device even in case of
a fault to earth of a mains phase which is not used by the device (of none of the two power supplies).
In order to ensure a trouble free operation in IT-System the
“
GND
”
potential of the control ports have
to be connected with the protective earth potential.
As a consequence of these connection must be considered for the control ports (exception
fl
oating
relay contacts):
1. Connection only with wires, suitable for mains voltage and surrounding area.
2. Connection with suitable isolated ampli
fi
ers only.
5.6
Residual-current-operated protective device
Danger due to electric current
To ensure as high a degree of reliability as possible we recommend a release current of 300 mA,
where a residual current circuit breaker (type A) is used.
Residual current circuit breaker (type A)
Exception: All-current-sensitive fault current circuit breaker on the 3 ~ 230 V line
When connecting the device between two outer conductors,
“
all-current-sensitive
”
fault current circuit
breakers must be used (see EN 50 178, Art. 5.2).
5.7
Motor protection
Integrated overload protection, preceding motor protection device unnecessary (max. line fuse see
Technical data).
5.8
Voltage supply
“
10 V DC
”
Voltage supply (PELV current source pursuant to DIN EN 60204-1) for external components, e.g. for
ECblue connection box.
Connection:
“
10 V
”
-
“
GND
”
(max. load see Technical data und connection diagram).
During an overload or short-circuit (10 V - GND), the control voltage (and thus the device) is
disconnected . Automatic start after elimination of the cause of error.
It is not permissible to connect outputs of several devices to each other!
Assembly instructions
ECblue
Electrical installation
L-BAL-F056-GB 1939 Index 003
Part.-No. 00700562-GB
17/35
