25
l
5.2 Setting the current limit
Setting the current limit is only required if the maximum output current must be
reduced.
• Turn trimmer "I
max
" fully counterclockwise and "n
min
" fully clockwise.
• Connect a moving coil ammeter into the armature circuit to measure the
current.
• Disconnect the field or stall the motor
(observe the current capacity of the motor during standstill!).
• For armature voltage control, remove jumper between terminals 2 and 4.
• Connect mains, close switch "RFR". Turn "I
max
" clockwise to set the
armature current.
• To calculate the value to be set, divide the rated armature current (see
nameplate) by the form factor (I
AN
/ F
F
).
The permissible rated controller current must not be exceeded.
• Then disconnect the mains, turn "n
min
" fully counterclockwise, connect the
field and for armature voltage control, reconnect the jumper between
terminals 2 and 4.
5.3 Speed setting
•
For armature voltage control with "I x R compensation" insert jumper
between terminals 2 and 4 as shown in the connecting diagram.
• For speed control with tacho feedback remove jumper between terminals
2 and 4. Connect the tachogenerator (see connecting diagram).
For rated tacho voltages > 40 V the setting range of the "n
max
" trimmer can
be improved by removing jumper "BR3" (see chapter 4.5 "Connecting
diagram" and chapter 2.2 "Dimensions").
Caution!
The jumper "BR3" must only be removed by qualified skilled personnel
when no voltage is applied.
In case of uncontrolled acceleration of the motor during speed setting,
immediately open switch "RFR". In this case, either the tachogenerator
feedback is missing or has incorrect polarity.
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