6
Electrical installation
Line connection energy supply
Operating Instructions – MOVIPRO
®
PHC11A-..M1-..2A-A1/..
47
6.1.5 Fuses and residual current devices
WARNING
Risk of injury due to use of the wrong earth-leakage circuit breaker (ELCB).
Severe or fatal injuries.
• The unit can cause direct current in the protective earth. If you are using a resid-
ual current device (RCD) for protection against direct or indirect contact, only an
RCD of type B on the current supply side of the unit is permitted.
SEW‑EURODRIVE recommends that you do not use residual current devices (RCD).
However, if a residual current device (RCD) is stipulated for direct or indirect protec-
tion against contact, observe the above warning note.
Install the fuses at the beginning of the power supply cables behind the supply bus
junction.
Line fuse types
Line protection types in operation classes gL, gG:
• Rated fusing voltage ≥ rated line voltage
• Depending on the frequency inverter utilization, the rated fusing current must be
designed for 100% of the frequency rated inverter current.
Line protection switches with characteristics B, C:
• Power circuit breaker rated voltage ≥ rated mains voltage
• The rated voltage of the line protection switch must be 10% above the frequency
inverter current.
6.2 Line connection energy supply
6.2.1 General information
Observe the following notes on electrical installation:
• Observe the general safety notes.
• Strictly observe all instructions referring to the technical data and the permissible
conditions regarding the place of installation.
• The integrated line filter reduces the bleeder resistance to less than 500 kΩ. There-
fore do not include the unit in the system test.
6.2.2 Low-voltage supply systems
The unit is only suitable and approved for operation on the following systems:
• TN and TT systems with directly grounded star point
• IT systems with non-grounded star point
In such a case, SEW‑EURODRIVE recommends that you use insulation monitors
employing pulse-code measurement. Use of such devices prevents the insulation
monitor mis-tripping due to the earth capacitance of the unit.
The EMC limit values are not specified for interference emission in IT systems.
20278543/EN – 09/2014
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