Lenze L-force ERB Serie Instrucciones Para El Montaje página 20

1 Safety instructions
Residual hazards
M
Warnings!
Conditions of Acceptability − when used in the
end−product equipment, the following are among
the considerations to be made:
The nominal loads of the resistors refer to
ƒ
conditions where the surrounding temperature
does not exceed 40 °C. If the temperature
exceeds 40 °C, contact LENZE for advice regarding
de−rating of nominal power.
The surface temperature must not exceed 355 °C
ƒ
at any point of the metal housing, as the
insulation material inside the resistor is rated
600 °C maximum. The resistor housing reaches
up to 335 °C at nominal load.
These devices are enclosed type devices. Check
ƒ
that the surface, which the resistor is mounted
on, can withstand the high temperature
radiation and convection from the resistor
surface. To protect personnel from contact with
high temperature parts the resistors must be
mounted minimum 6.5 feet (2 m) from the floor.
A clearance of minimum 200 mm below and at
ƒ
each side and 500 mm above the resistors must
be observed.
The equipment must be properly connected to
ƒ
earth ground in the end−use equipment.
The thermal cut−out, if provided, protects the
ƒ
resistor from destruction when over loaded at
normal conditions. The suitability of the thermal
cut−out at motor drive fault must be determined
in the end−use application.
The resistors are intended to be mounted with
ƒ
the longest side vertically or horizontally.
Nominal load refers to the vertical position.
Horizontal position requieres a load reduction of
20 %. If mounted vertically the connection box
must face downwards.
The resistors with protection class 4X / IP65 can
ƒ
be mounted in any allowed position whereas the
1X / IP21 types only meet the IP21 requirements
when mounted vertically.
Nominal load refers to mounting of a single
ƒ
resistor. If two or more resitors are mounted next
to each other de−rating according to the above
mentioned maximum surface temperatures are
necessary.
20
l
EDKRBM390R DE/EN/FR/ES/IT 2.0