Rockwell Automation 1391ES AC Servo Controller - Manual (Page 45)

Installation
Chapter 6
6-43
Fusing (Transformer Primary)
Time delay fusing similar to Bussman Fusetron FRS Series or equivalent
must be used if the primary circuit is fused. Circuit breakers must provide
equivalent operation.
Fuse ratings shown in Table 6.C are the highest ratings allowed in a 25
°
C
(77
°
F) ambient temperature. Higher electrical enclosure ambient
temperatures will require fuses with higher current ratings. Consult fuse
manufacturer’s derating data. Fuses larger than those listed below may
result in transformer damage.
Table 6.C
Fuse Current Rating (A)
Primary Volt-
age
208V AC
240V AC
380V AC
415V AC
480V AC
575V AC
1.5
8
7
4.5
4
3.5
3
3.5
17.5
15
9
8
7
6
5.0
20
20
12
12
10
8
10.0
40
35
25
20
17.5
15
12.5
50
45
30
25
25
20
15.0
60
50
35
30
30
25
kVA
External Shunt Regulator Resistor
The external Shunt Regulator Resistor and fuse for the 45A 1391B-ES
must be connected to TB5-8 and TB5-9 as described in Chapter 9.
22.5A controllers must be converted for use with an external shunt resistor
and fuse. Refer to Chapter 9 for detailed instructions.
Interface Connections
Refer to Chapter 5 and Appendix B for connection information.
Motor Option Wiring
Wiring information is provided in Chapter 8 for the Blower Mod and Brake
Power Supply kits.