Residual Hazards; Safety Instructions For The Installation According To Ul/Csa - Lenze Emb9341 Betriebsanleitung

2.2

Residual hazards

Protection of persons
Before working on the regenerative power supply module, check that no voltage is
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applied to the power terminals.
– After mains disconnection, the power terminals +UG, −UG remain live for at least
3 minutes.
The operating temperature of the heatsink at the regenerative power supply
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module is > 70 °C:
– Skin contact with the heatsink results in burns.
All pluggable terminals must only be plugged on or removed when no voltage is
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applied!
Device protection
Cyclic connection and disconnection of the supply voltage can overload and destroy
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the input current limitation of the connected regenerative power supply modules:
– Allow at least 3 minutes between disconnection and reconnection!
The regenerative power supply module has no overload protection:
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– The rated current and maximum current values specified in the technical data
must not be exceeded.
If the DC−bus voltage increases during the feedback operation by more than 75 V
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(EMB9341/EMB9342) or 100 V (EMB9343) above the rectified value of the mains
voltage, the regenerative power supply module will be overloaded. This may destroy
the device.
– For this reason, the feedback operation must be inhibited if the DC−bus voltage
reaches impermissible values.
– For this purpose please follow the circuit proposals (¶ 124).
2.3

Safety instructions for the installation according to UL/CSA

Warnings!
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EDBMB9340 DE/EN/FR 12.0
Device is live up to 180 s after mains voltage disconnection.
Suitable for use on a circuit capable of delivering not more than 5000 rms
symmetrical amperes, 480 V max, when protected by CC, J, T or R class fuses
(400/480 V devices).
Branch circuit protection has to be provided externally in accordance with
corresponding instructions, the National Electrical Code and any additional
codes.
Use 60/75 °C or 75 °C copper wire only.
Observe the specifications for fuses and screw−tightening torques in these
instructions.
Maximum surrounding air temperature 40 °C.
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Safety instructions
Residual hazards
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