LiftEquip MFC 16 12, Installation Instruction

Page: 7 / 23

Edition: October 1997 - 7 -
1.4 General Instructions
1.4.1 Supply Voltage
When the supply voltage deviates from the authorised Supply Voltage Tolerance
(380V -10% ... 415V + 10%), it is necessary to fit an Autotransformer at the power
supply point.
Because of the fixed voltage motor, suitable adaptation is also necessary where the
supply voltage is too low.
1.4.2 Supply Form
The Inverter and the Power Supply Filter are set up for TN and TT supplies (VDE
0100 part 410).
For other supply types, e.g. IT supply, an Isolating Transformer is necessary at the
power supply point. If this is not done an undefined load can occur at the power
supply filter in the case of an earth fault.
1.4.3 Supply Connection
The Inverter must be connected to the Incoming Power Supply via a permanent
connection.
1.4.4 Earth Leakage Current
To suppress radio interference, Y condensers ar fitted in the Inverter and in the
external circuit between the Phase and the Earth wire. These counteract leakage
corrents each of > 3.5 mA.
Therefore, in accordance with VDE 0160 (6.5.2.1a), the earth wire cross-section of
the power supply must be at least 10mm² Cu.
1.4.5 Fault Current
A D.C. fault current can occur in the inverter by body contact. This fact, with the
existing leakage of the Y condensors, does not allow the use of an fault current (FI)
protection device. to conform with VDE 0160 (5.5.3.4.2), a suitable notice must be
given in the operating instruction manual forbidding the use of a fault current (F1)
protection relay.
1.4.6 Insulation Resistance
Resistors are wired in parallel for the discharge of Y condensors.
It is therefore not possible to measure the insulation resistance on an Inverter and ist
accessories, when installed and operationally ready.
The testing of the insulation resistance is carried out as part of the quality control in
accordance with the Standards of the German Society of Electrical Engineers (VDE
0160 - 7.6.2)
1.4.7 Discharge Time of the Radio Interference Filter
A residual voltage of 60V after 5 seconds, as recommended in the VDE 0113 (part 1)
Standards, is not conformed with.
An appropriate warning notice must be displayed in the control cabinet.