Operating instructions
K3G710-PV05-02
Translation of the original operating instructions
4.2.2 Supply connection and fuses
Assignment of supply cable cross-sections and their required fuses (line
protection only, no equipment protection).
Nominal
voltage
Fuse
Automatic
circuit
breaker
Cable
cross-
section
Cable
cross-
section
VDE
UL
VDE
mm²
*AWG
3/PE AC
380-480
VAC
20 A
20 A
C20A
2.5
14
3/PE AC
380-480
VAC
25 A
25 A
C25A
4.0
12
* AWG = American Wire Gauge
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. 3: Recommended stripped lengths in mm (inside terminal box)
Legend: CL = control lines
4.3.2 Connecting wires to terminals
WARNING
Live terminals and connections even with device
switched off
Electric shock
→ Wait five minutes after disconnecting the voltage at all poles
before opening the device.
;
Remove the cap from the cable gland.
Only remove caps where cables are fed in.
;
Route the wire(s) (not included in scope of delivery) into the terminal
box.
;
First connect the "PE" (protective earth).
;
Connect the wires to the corresponding terminals.
Use a screwdriver to do so.
When connecting, ensure that no wire ends fan out.
Item no. 55980-5-9970 · ENU · Change 212420 · Approved 2020-02-17 · Page 8 / 15
ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
