
Rockwell Automation Publication 20P-TD001K-EN-P - January 2021
17
PowerFlex DC Drive and Field Controller Technical Data
Install an SCR Overvoltage Protection Device
When the PowerFlex DC field controller is used as a motor/generator field supply, an overvoltage protection device (voltage clamp) must be
installed on the field controller load. The purpose of the voltage clamp is to provide a means to let the DC output current to the load decay if
the power is interrupted to the field controller. If the AC power to the connected field controller is interrupted, the current in the DC output to
the field starts to the decay rapidly. This rapid decay generates voltages that are in direct proportion to the rate of decay of the ‘field
collapse.’ These voltages can damage the field controller and/or the motor wire insulation. The voltage clamp is connected directly across
the DC output power connections to the load and during normal operation it appears as an open circuit. See
PowerFlex Field Controller with
, for an illustration of the voltage clamp installation location.
Dynamic Brake Resistor Kits and DC Output Contactors
Alternate Dynamic Brake Resistor Kits and DC Output Contactors on page 19
for recommended alternate DC Output Contactors for 575V
and 690V AC input drives, respectively.
230V AC Input Drives
Fr
am
e Drive Current
Rating Code
DC
Amps
AC Line
Amps
Hp
Dynamic Brake
Resistor Kit Cat. No.
Armature
Voltage
(V)
Total dB
Resistance
(ohms)
DC Loop Contactor Cat. No.
(1)
(1) Coil voltage = 115V AC, 50/60Hz.
DC Contactor
Crimp Lugs
Cat. No.
(2)
(2) For more information, see
DC Contactor Crimp Lug Kit Specifications on page 19
Drive without
Dynamic Brake
Drive with
Dynamic Brake
A
7P0
7
5.7
1.5
1370-DBL62
240
20
1370-NC56
1370-DC56
1370-LG40
9P0
9
7.4
2
1370-DBL63
012
12
9.8
3
1370-DBL64
15
020
20
16
5
1370-DBL65
8.6
029
29
24
7.5
1370-DBL66
6
038
38
31
10
1370-DBL67
5
055
55
45
15
1370-DBL68
3.5
1370-LG56
073
73
60
20
1370-DBL69
2.6
1370-NC110
1370-DC110
1370-LG92
093
93
76
25
1370-DBL70
2
110
110
90
30
1370-DBL71
1370-LG110
B
146
146
119
40
1370-DBL72
1.4
1370-NC180
1370-DC180
1370-LG160
180
180
147
50
1370-DBL73
1
1370-LG180
218
218
178
60
1370-DBL74
1370-NC280
1370-DC280
1370-LG228
265
265
217
75
1370-DBL75
0.67
1370-LG268
360
360
294
100
1370-DBL76
0.47
ABB_EHDB360C2P-1L2S
ABB_EHDB360C-1L22SS
(3)
(3) Wire and lug size dependent on enclosure dimensions and local codes.
434
434
355
125
CUTLER-
HAMMER_G3AP50
(Qty 4 - two in series,
two in parallel)
0.4
ABB_EHDB520C2P-1L2S
ABB_EHDB520C-1L22SS
C
521
521
426
150
HUBBELL_Y139W322GB
0.322
700
700
572
200
(4)
(4) No dynamic brake resistor kit available for this drive rating—must be sourced locally.
0.25
ABB_EHDB800C2P-1L2S
ABB_EHDB800C-1L22SS
D
875
875
715
250
0.2
ABB_EHDB960C2P-1L2S
ABB_EHDB960C-1L22SS
1K0
1050
858
300
SIEMENS-MFG_14-193-101-
58-2 (Qty 2)
SIEMENS-MFG_14-193-101-
58-2 (Qty 1)