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Safety instructions

Residual hazards

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EDBMB9340 DE/EN/FR 12.0

2.2 Residual hazards

Protection of persons

ƒ Before working on the regenerative power supply module, check that no voltage is

applied to the power terminals.

– After mains disconnection, the power terminals +UG, −UG remain live for at least

3 minutes.

ƒ The operating temperature of the heatsink at the regenerative power supply

module is > 70 °C:

– Skin contact with the heatsink results in burns.

ƒ All pluggable terminals must only be plugged on or removed when no voltage is

applied!

Device protection

ƒ Cyclic connection and disconnection of the supply voltage can overload and destroy

the input current limitation of the connected regenerative power supply modules:

– Allow at least 3 minutes between disconnection and reconnection!

ƒ The regenerative power supply module has no overload protection:

– The rated current and maximum current values specified in the technical data

must not be exceeded.

ƒ If the DC−bus voltage increases during the feedback operation by more than 75 V

(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!

ƒ Device is live up to 180 s after mains voltage disconnection.

ƒ 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).

ƒ Branch circuit protection has to be provided externally in accordance with

corresponding instructions, the National Electrical Code and any additional

codes.

ƒ Use 60/75 °C or 75 °C copper wire only.

ƒ Observe the specifications for fuses and screw−tightening torques in these

instructions.

ƒ Maximum surrounding air temperature 40 °C.

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