NORDAC SK 200E Manual
38
Subject to technical alterations BU
0200
GB
2.7.1
Mains connections (X1 - L1, L2, L3, EARTH)
No special safety measures are required on the mains input side of the frequency inverter. It is advisable to
use normal mains fuses (see technical data) and a main switch or circuit breaker.
115V devices
may only be used with a 110…120V (L/N = L1/L2) single phase supply.
230V devices
may be ordered either for single phase (...-123-, L/N = L1/L2) or three phase (...-323-,
L1/L2/L3) operation. It is essential to note the type designation!
400V devices
are designed for three phase mains voltage 380...480V (L1/L2/L3).
For the exact specification, please refer to the technical data in Section 8.
Connection to the bonding is by means of screw terminals in the cast housing of the connection unit:
Connection cross-section:
0.5 ... 6mm
2
rigid/ flexible cable
AWG 20-10
For looping of the mains voltage, up to a
cable cross-section of 2x 2.5mm
2
double
wire end sleeves must be used.
Tightening torque:
1.2 ... 1.5Nm
Operation on an IT network
The use of this frequency inverter on an
IT network
is possible after modifications by means of jumpers.
Further details in Section 2.7.4, 2.7.5 - 2.7.6 .
The operation of a frequency inverter in an IT network is only permissible if a brake resistor is connected, in
order to prevent impermissible charging of the inverter link circuit in case of a mains fault (short-circuit to
earth). The prerequisite for the control of the brake resistor is the presence of a 24V control voltage.
Therefore, in case of an external (24VDC) frequency inverter control voltage supply, it is essential that this is
always switched on ahead of the mains voltage or is switched off after disconnection from the mains.
ATTENTION
For the operation of the frequency inverter on an IT network, the mains voltage may only be
connected to the frequency inverter if the control voltage (24V supply) is available to the
frequency inverter. Otherwise there is a danger of destruction of the frequency inverter in
case of a mains fault (short-circuit to earth).
PE
Main
Summary of Contents for SK 200E Series
Page 1: ...GB BU 0200 NORDAC SK 200E Frequency inverter manual Quick commissioning page 123...
Page 2: ...NORDAC SK 200E Manual 2 BU 0200 GB...
Page 138: ...NORDAC SK 200E Manual 138 Subject to technical alterations BU 0200 GB 5 4 6 Certificate...
Page 262: ...NORDAC SK 200E Manual 262 BU 0200 GB...
Page 263: ...10 Keyword index BU 0200 GB 263...
Page 264: ...NORDAC SK 200E Manual 264 BU 0200 GB Part No 607 2002 1310...
Page 265: ...The Nordac SK 200E is available to order from www inverterdrive com...