2 Mounting and installation
BU 0200 en-US-4920
53
Pos : 102 /Anleit ungen/El ektr onik /FU und St art er/2. M ontage und I nst allation/Z ubehör/ Brem swiderst and/ SK 1x 0E, SK 2x xE/Brem swiderst and ( BW) (Überschrif t +) [ SK 1x 0E, SK 2x xE] @ 1\mod_1342513979710_14638.docx @ 32689 @ 2 @ 1
2.3 Braking resistor (BW)
- (from size
1
)
During dynamic braking (frequency reduction) of a three-phase motor, electrical energy is fed back to
the inverter if necessary.
From size 1
and above, an internal or external braking resistor can be used
to avoid a shutdown of the device due to overvoltage. The integrated brake chopper (electronic switch)
sheds the excess DC link voltage (operating point approx. 420 V/720 V
DC
, depending on line voltage)
to the braking resistor. The braking resistor converts excess energy into heat.
Pos : 103 /Anleit ungen/El ektr onik /FU und St art er/1. Allgemei nes /Sic herheits- und Ins tall ations hinw eis e und W arn- Gefahrenhinw eise/neu/War n- und Gefahrenhinw eise/VORSICHT - H eiße O ber fläc hen ( Bremswi ders tand) @ 28\m od_1551424569795_14638. docx @ 2493080 @ @ 1
CAUTION
Hot surfaces
The braking resistor and all other metal components can heat up to temperatures above 70°C.
• Risk of injury due to local burns on contact.
• Heat damage to adjacent objects
Allow sufficient cooling time before starting work on the product. Check the surface temperatures with
suitable measuring equipment. Maintain an adequate distance to adjacent components.
Pos : 104 /Anleit ungen/El ektr onik /FU und St art er/2. M ontage und I nst allation/Z ubehör/ Brem swiderst and/ SK 1x 0E, SK 2x xE/INFORM ATI ON - D at en Br emswiderst and param etrier en [ SK 200E] @ 21\mod_1528383930708_14638. docx @ 2424921 @ @ 1
Information
Parameterization of braking resistor data
To protect the braking resistor from overload, the electrical characteristics of the braking resistor must be
parameterized in parameters
P555
,
P556
and
P557
. With use of an
internal braking resistor
(SK BRI4-…) this is
done by setting the DIP switch
S1:8
(
Section 2.3.1)
Pos : 105 /Anleit ungen/El ektr onik /FU und St art er/2. M ontage und I nst allation/Z ubehör/ Brem swiderst and/ SK 1x 0E, SK 2x xE/Inter ner Br emswiderst and SK BR I4-. .. [SK 2xx E] @ 21\mod_1528365342363_14638.docx @ 2424697 @ 35 @ 1
2.3.1 Internal braking resistor SK BRI4-…
The internal braking resistor can be used if only slight, short
braking period are to be expected. The item includes a set of
2 braking resistors in the individual rating classes of size 4.
These must be connected in parallel and thereby satisfy the
electrical data from the description of the material. The
mounting location for the 2nd braking resistor is opposite the
mounting location of the 1st braking resistor.
Similar to illustration
