For 1 ~ fan types
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.
For 3 ~ fan types
3 ~ types in the version described here are suitable for use in the IT-System!
Capacitors are installed between the housing potential and the intermediate circuit to reduce radio
interference voltages. This must be considered for the choice of insulation monitoring device!
5.6.6
Operation in Grounded Delta System
A device must be selected which allows operation on the existing network type.
Source of energy
delta_grounded_networks.eps
15.06.2012
In Delta System with earthed line phase the maximum voltage between a phase
and the protective earth is as high as the voltage between two phases.
In the versions described here, the speci
fi
ed voltage supply (see Technical Data)
is permitted at the maximum between the mains connection and the "PE"
conductor and they are therefore suitable for use in a Grounded Delta System!
5.7
Systems with residual current protective devices
Whether the use of a residual current protective device (RCD) is necessary or allowed depends on the
design of the low-voltage system on which the device is to be operated.
The assessment whether or which residual current protective device should be used is the responsi-
bility of the system operator or electrician commissioned by it.
Danger due to electric current
When selecting the tripping characteristics of the residual current protective device, the possible
residual current form of the power electronics (system with semiconductors) must be observed in
conjunction with the standards and regulations applicable at the place of use.
Design of the power electronics
•
The design of the power electronics of a 1 ~ ECblue motor corresponds to a frequency inverter with
two-pulse bridge circuit and PFC (Power Factor Correction).
•
The design of the power electronics of a 3 ~ ECblue motor corresponds to a frequency inverter with
six-pulse bridge circuit.
Information
To prevent false tripping due to pulse-like charging currents of the integrated EMC
fi
lter, we
recommend a rated differential current of 300 mA for reasons of operational reliability in the case of
fi
xed connection and use of a residual current protective device.
5.8
Motor protection
Integrated overload protection, preceding motor protection device unnecessary (max. line fuse see
Technical data).
Assembly instructions
ECblue BASIC-MODBUS, ECblue BASIC
Electrical installation
L-BAL-F079D-GB 2044 Index 002
Part.-No.
29/80
