Operating Instructions – Electronic Motor DRC.-..-SNI
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Installation instructions
Electrical Installation
5.2.6 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.
5.2.7 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 con-
ductor. 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 per-
mitted 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.
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