Lenze ECSCExxx Power supply module - Manual (Page 17)

Safety instructions
Residual hazards
2
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17 EDBCSXE040 EN 7.0
2.2 Residual hazards
Protection of persons
ƒ Before working on the power supply module, check that no voltage is applied to the
power terminals, because
– the power terminals +UG, −UG, BR0 and BR1 remain live for at least 3 minutes after
mains disconnection.
– because the power terminals +UG, −UG, BR0 and BR1 remain live when the motor
is stopped.
ƒ The operating temperature of the heatsink is > 70 °C:
– Direct skin contact with the heatsink results in burns.
ƒ The leakage current to PE is > 3.5 mA AC or > 10 mA DC.
– According to EN 61800−5−1, a fixed installation is required.
– The PE connection has to conform to EN 61800−5−1.
– Comply with further requirements of EN 61800−5−1 for high leakage currents!
ƒ Operation of the power supply module with an earth−leakage circuit breaker:
– The power supply modules are provided with an internal mains rectifier. In the
event of a short−circuit to frame, a non−pulsating DC fault current can prevent the
tripping of AC−sensitive or pulse−current−sensitive earth−leakage circuit breakers
and thus block the protective function for all electrical equipment operated on
these earth−leakage circuit breakers.
– If a residual current device (RCD) is used as a protective means in the case of direct
or indirect contact, only a residual current device (RCD) of type B may be used.
Otherwise, another protective measure, such as separation from the environment
through double or reinforced insulation or disconnection from the mains by means
of a transformer must be used.
Device protection
ƒ The power supply module may only be driven from balanced mains supplies. Mains
supplies with earthed phase are not permitted.
ƒ The power supply module contains electrostatic sensitive devices. The personnel
must be free of electrostatic charge prior to assembly and service operations.
ƒ All pluggable connection terminals must only be connected or disconnected when
no voltage is applied!
ƒ The power terminals +UG, −UG and PE are not protected against polarity reversal.
– When wiring, observe the polarity of the power terminals!
ƒ Observe the max. permissible mains voltage. Higher voltages will damage the power
supply module.
ƒ Operation is not permitted
– without the use of a brake resistor.
– if an internal brake resistor and an external brake resistor are used simultaneously.
– if several power supply modules are connected in parallel.