Lenze ERBMxxxRxxxx - Manual (Page 26)

2 Safety instructions
Residual hazards
EDKRBM470R DE/EN/FR 5.0 26
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Stop!
Possible overheating of the brake resistor during
operation
Inadequate heat dissipation during operation can
cause the brake resistor to overheat.
Possible consequences:
ƒ The brake resistor is destroyed.
ƒ The drive is not braked but coasts to a standstill.
Protective measures:
ƒ Always connect the thermal contact of the brake
resistor.
ƒ Integrate the thermal contact into the overall
equipment monitoring apparatus in such a way
that the supply of power to the standard device is
switched off if the brake resistor overheats (e.g.
switch−off by means of mains contactor control).
O
Warnings!
Conditions of Acceptability:
ƒ The products covered by this report are intended
for use with Power Conversion Equipment
(drives) only.
ƒ The Temperature Switch must be connected to
the drive, so that the drive switches off in case
when the maximum operating temperature is
exceeded.
ƒ Temperature tests and abnormal operation tests
have only been conducted for single resistive
elements (ALW 40 and ALW 80) and for
continuous duty as indicated under RATINGS. For
any grouping of ALW 40 and ALW 80 an
additional temperature test must be conducted,
depending on the evaluation of the mechanical
construction and the expected temperature rise.
ƒ For any duty cycle operation in the end−use
application it must be guaranteed that the
maximum Wattage rating will not be exceeded.
This may be evaluated by calculation. If there will
be any concern regarding to this, additional
temperature tests have to be conducted under
end−use conditions.
ƒ These devices should be used within their
recognized ratings as specified above.