42
Operating Instructions – Electronic Motor DRC.-..-DAC
5
Installation instructions
Electrical Installation
5.2.7
Line protection and residual current device (RCD or RCM)
• Install the fuses at the beginning of the power supply cables behind the supply bus
junction.
• A conventional residual current device is not permitted. Residual current devices
sensitive to universal current (trip current 300 mA) are permitted. During normal
operation of DRC, earth-leakage currents of > 3.5 mA can occur.
• SEW-EURODRIVE recommends to not use residual current devices. However, if a
residual current device is stipulated for direct or indirect protection against contact,
observe the above note in accordance with EN 61800-5-1.
5.2.8
Line contactor
• Use only a contactor of utilization category AC3 (EN 60947-4-1) as a line contactor.
WARNING
Electric shock due to incorrect earth-leakage circuit breaker type.
Severe or fatal injuries.
• The connected DRC drive units can cause direct current in the protective earth
conductor. In cases where an earth-leakage circuit breaker is used for protection
against direct or indirect contact, only a type B earth-leakage circuit breaker is
permitted on the power supply side of DRC drive units.
NOTICE
Damage to the DRC inverter due to jogging of the line contactor.
Damage to the DRC inverter.
• Do not use the line contactor (see wiring diagram) for jog mode but only for
switching the inverter on and off. For jog mode, use the control commands.
• Observe a minimum switch-off time of 2 s for the line contactor.
