X5 AC Drive User’s Manual
Chapter 4: Connections
DPD00089A
-
36 -
© 2009 Vacon Incorporated All Rights Reserved
4.5
Dynamic Braking
The X5 AC drive is supplied with an integrated dynamic braking (DB) resistor, and is designed to
have adequate dynamic braking for most applications. In cases where short stopping times or high
inertia loads require additional braking capacity, install an external resistor.
Note:
For
Size 4
(60-100 HP) and
Size 5
(125-200 HP) models, additional external dynamic braking
requires a kit that provides the connections to the braking transistors. The
XDBKITS4
and
XDBKITS5
kits can be purchased through local distributors.
If an external resistor is used for dynamic braking,
the internal resistor must be disconnected
. To
install an external resistor, first disconnect the internal DB resistor (or resistor
s
in 460 and 575 Vac
models) and properly terminate the wires leading to it. Then connect the external resistor fast-on
terminals where the internal resistor had been connected.
410
must be made when using external DB resistors.
Verify with the manufacturer of the selected resistor that the resistor is appropriate for your
application. Contact Vacon’s Electronic Application Engineering group for further assistance with
other possible sizing limitations.
Refer to
for information about dynamic braking capacity for each X5 model.
Table 4-7: X5 Dynamic Braking Capacity
(Page 1 of 2)
(* Note that the asterisked X5 model numbers cannot
have external braking added)
Model
KW
Standard
Resistance
(ohms)
Standard DB
(% of Drive
Power)
Min. Allowed
Res. (ohms)
Max. Peak
Watts
Max. Ext. DB
(% of Drive
Power)
1S010
*
.75
125
164%
--
--
--
20010
*
.75
125
164%
--
--
--
20020
*
1.5
125
82%
--
--
--
20030
*
2.2
125
55%
--
--
--
20050
3.7
60
68%
43
3,555
95%
20075
5.5
60
45%
30
5,096
91%
20100
7.5
60
34%
27
5,662
76%
20150
11
60
23%
20
7,644
68%
20200
15
30
34%
10
15,288
102%
20250
18
30
27%
10
15,288
82%
20300
22
30
23%
10
15,288
68%
40010
*
.75
500
163%
--
--
--
40020*
1.5
500
82%
--
--
--
40030
*
2.2
500
54%
--
--
--
40050
3.7
120
136%
100
6,084
163%
40075
5.5
120
91%
75
8,112
145%