Parker 650V series - Page 39

3-22 Installing the Drive
650V AC Drive
North American Standard Dynamic Braking Resistor Kits
The Dynamic Braking Resistor kits were designed for stopping a motor at full load current from
base speed with two times motor inertia, three times in rapid succession in accordance with
NEMA ICS 3-302.62 Dynamic Braking Stop option.
460 VAC Dynamic Braking Resistor
Kit with Cover
HEAVY DUTY
460 VAC Dynamic Braking Resistor
Kit with Cover
NORMAL DUTY
Hp
Ohms
kW
Catalog No.
Ohms
kW
Catalog No.
7.5
100
0.2
CZ353179
100
0.2
CZ353179
10
54
0.7
CZ353181
100
0.7
CZ353179
15
54
0.84
CZ353181
54
0.84
CZ353181
20
30
1.26
CZ353182
54
1.26
CZ353181
25
30
1.17
CZ353182
30
1.17
CZ353182
30
30
1.56
CZ353182
30
1.56
CZ353182
40
26
2.03
CZ353183
30
2.03
CZ353182
50
18.4
2.36
CZ353185
26
2.36
CZ353183
60
12
2.0
CZ353186
18.4
2.92
CZ353185
75
9
3.39
CZ353188
12
3.39
CZ353186
100
7
3.39
CZ353189
9
3.39
CZ353188
125
5.5
3.39
CZ353190
7
3.39
CZ353189
150
5.5
3.39
CZ353190
5.5
3.39
CZ353190
Brake Resistor Selection
Note: Parker SSD Drives can supply suitable brake resistors.
Brake resistor assemblies must be rated to absorb both peak braking power during deceleration
and the average power over the complete cycle.
Peak
braking
power P
0
0055
n
n
t
W
1
2
2
2
b
=
×
−
.
(
)
(
)
pk
×
J
J - total inertia (kgm
2
)
n
1
- initial speed (rpm)
Average braking power P
P
t
av
pk
c
=
x t
b
n
2
- final speed (rpm)
t
b
- braking time (s)
t
c
- cycle time (s)
Obtain information on the peak power rating and the average power rating of the resistors from
the resistor manufacturer. If this information is not available, a large safety margin must be
incorporated to ensure that the resistors are not overloaded.
By connecting these resistors in series and in parallel the braking capacity can be selected for
the application.
IMPORTANT: The minimum resistance of the combination and maximum dc link voltage must be as
specified in Chapter 10: “Technical Specifications” - Internal Dynamic Brake Switch.
0
20
40
60
80
100
120
0 25 50 75 100 125 150 175 200
Ambient Temp (C)
% of Rated Power
chassis mounted
free air
Figure Chapter 3 -15 Brake Resistor Derating Graph