Operating instructions
K3G450-PA31-03
Translation of the original operating instructions
4.2.3 Reactive currents
Because of the EMC filter integrated for compliance with EMC
limits (interference emission and immunity to interference),
reactive currents can be measured in the supply line even
when the motor is at a standstill and the line voltage is switched
on.
●
The values are typically in the range < 500 mA.
●
At the same time, the effective power in this operating state
(operational readiness) is typically < 6 W.
4.2.4 Residual current circuit breaker (RCCB)
If the use of a residual current device (RCD) is required in your
installation, only AC/DC-sensitive residual current devices
(type B or B+) are permissible. As with variable frequency
drives, residual current devices cannot provide personal safety
while operating the device. When the device power supply is
switched on, pulsed charging currents from the capacitors in the
integrated EMC filter can lead to the instant tripping of residual
current devices. We recommend the use of residual current
circuit breakers (RCCB) with a trip threshold of 300 mA and
delayed tripping (super-resistant, characteristic K).
4.2.5 Leakage current
For asymmetrical power systems or if a phase fails, the
leakage current can increase to a multiple of the nominal value.
4.2.6 Locked-rotor protection
Due to the locked-rotor protection, the starting current (LRA) is
equal to or less than the nominal current (FLA).
4.3 Connection in terminal box
4.3.1 Preparing cables for connection
Only strip the cable as far as necessary, ensuring that the cable gland is
sealed and there is no strain on the connections. For tightening torques,
see Chapter 3.1 Product drawing.
NOTE
Tightness and strain relief are dependent on the cable
used.
→ This must be checked by the user.
Fig. 2: Recommended stripped lengths (inside terminal box)
(1) supply line (2) control and relay line
4.3.2 Terminal connection data
Supply line
min.
max.
Rigid cable cross-
section
0.2 mm²
4 mm²
Flexible cable cross-
section
0.2 mm²
4 mm²
AWG/kcmil cable
cross-section
24
12
Wire-end ferrules with
insulating collar,
in accordance with
DIN 46228-4 for
flexible cable
0.25 mm²
4 mm²
Wire-end ferrules
without insulating
collar,
in accordance with
DIN 46228-1 for
flexible cable
0.25 mm²
4 mm²
NOTE
The cable and cable cross-section must be selected taking into
account the max. starting current of the drive and the type of
cable routing (see Chapter 4.2.2 Supply connection and fuses)
Control and relay cables
min.
max.
Rigid cable cross-
section
0.2 mm²
1.5 mm²
Flexible cable cross-
section
0.2 mm²
1.5 mm²
AWG/kcmil cable
cross-section
24
16
Wire-end ferrules with
insulating collar,
in accordance with
DIN 46228-4 for
flexible cable
0.14 mm²
0.75 mm²
Item no. 55781-5-9970 · ENU · Change 260705 · Approved 2022-09-01 · Page 8 / 16
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