Electrical Service Guide; Rack Line Fuse Requirements - Miller Cst-8 Pack Rack Manuel Du Propriétaire

3-9. Electrical Service Guide

Input Voltage
Input Amperes At Rated Output
Max Recommended Standard Fuse Rating In Amperes
Time-Delay
Normal Operating 3
Min Input Conductor Size In AWG
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG
Reference: 2005 National Electrical Code (NEC) (including article 630)
1 If a circuit breaker is used in place of a fuse, choose a circuit breaker with time-current curves comparable to the recommended fuse.
2 "Time-Delay" fuses are UL class "RK5" .
3 "Normal Operating" (general purpose - no intentional delay) fuses are UL class "K5" (up to and including 60 amp), and UL class "H" ( 65 amp and
above).
4 Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table
310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.
Y Caution: Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard. These
recommendations are for a dedicated branch circuit that applies to the rated output and duty cycle of the welding power source.

3-10. Rack Line Fuse Requirements

Input Voltage Amperage Input At
(3-Phase) Rated Load Output,
50/60 Hz
220 VAC
230 VAC
400 VAC
440 VAC
460 VAC
575 VAC
* Full 280 amperes output from power source may cause rack line fuses to blow. Reduce output to 235 amperes.
** Full 280 amperes output from power source may cause rack line fuses to blow. Reduce output to 245 amperes.
{ Rack is supplied with 25 ampere fuses. No fuse kit is available.
OM-232 133 Page 16
1
2
Recommended Line
Fuse Size (Amps)
34.2
33.5
19.7
18.1
17.4
14.3
220 230
307 293
350 350
450 450
3/0 3/0
135 147
(41) (45)
2 2
Individual Fuse Part
30* 199 795
30** 199 795
25 220 513
25 220 513
25 220 513
20 212 541
50/60 Hz Three Phase
400 440 460
169 153 147
200 175 175
250 225 225
2 3 3
228 229 251
(69) (70) (76)
4 4 4
Bussman Fuse Part No.
No.
KTK-R-30
KTK-R-30
KTK-R-25
KTK-R-25
KTK-R-25
KTK-R-20
575
117
125
175
4
327
(100)
6