Reel FlexiMova mm F0K37 Series, Руководство по проектированию и установке, Страница: 63 / 84

8 Electrical connections
FlexiMova
®
mm - Design and Installation
63 of 80
8.6 Braking resistor
8.6.1 Guidelines for selecting the braking resistor
See Table 34 for the selection of the resistor (value and power). Use DC
insulated cables suitable for the voltage that can reach values up to 840
VDC.
For the braking resistor connection see par. 8.6.2 .
The value of the product’s “3-3-11-4 Brake resistor action time” parameter
determines the maximum brake pulse expressed in m/s: if this time is exceeded
alarm A11 “Brake resistor overload” appears.
sole function of signalling a triggered event (without interrupting the
power supply).
To safely shut down the system use a command from the installed
protection. Do not shut down the system by cutting off the power to the
braking resistor.
Thermal sensors affixed directly to the component.
Thermal devices for monitoring current/power and having the
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If the parameter “3-3-11-4” is set at zero, the braking chopper is disabled.
Always adopt suitable protections for this component as the utilization
factor is linked to the system dynamics and may be unpredictable.
In particular it is necessary to adopt protections against excessive use of the
braking resistor, to prevent the component from overheating and possibly
even breaking.
Suitable devices for this use are:
The Manufacturer informs operators that although all possible technical-
construction protective measures have been taken to make the product
safe possible residual risks Nos. 2 and 3 (see par. 5.12) .
DANGER
It is prohibited to remove the central part of the heatsink.
WARNING
It is mandatory to disconnect the frequency converter from the mains
power network before beginning any maintenance or installation work.
WARNING
It is mandatory to observe the specified discharge time of the capacitors after
stopping (> 10 min).
WARNING