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Factory Recommended Branch Circuit Protection
Yaskawa recommends installing the following branch circuit protection on each of the 6 phases of the secondary circuit of a
6-Phase/12-Pulse transformer to maintain standards compliance. Semiconductor protective type fuses as listed in Table 13 are
preferred. Alternate branch circuit protection devices are listed in Table 14. Refer to local codes for proper Branch Circuit
Protection on the primary circuit of a 6-Phase/12-Pulse transformer.
NOTICE: If a fuse is blown or a Ground Fault Circuit Interrupter (GFCI) is tripped, check the wiring and the selection of peripheral devices
to identify the cause. Contact Yaskawa before restarting the drive or the peripheral devices if the cause cannot be identified.
Table 13 Factory Recommended Drive Branch Circuit Protection
Drive Model
Bussmann Fuse Type
Model Fuse Ampere Rating (A)
4T0058o
FWH-100B 100
4T0072o
FWH-150B 150
4T0088o
FWH-200B 200
4T0103o
FWH-200B 200
4T0139o
FWH-200B 200
4T0165o
FWH-200B 200
4T0208o
FWH-275A 275
4T0250o
FWH-275A 275
4T0296o
FWH-350A 350
4T0362o
FWH-350A 350
4T0414o
FWH-450A 450
4T0515o
FWH-500A 500
4T0675o
FWH-700A 700
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Alternative Branch Circuit Protection
The alternative branch circuit protection is time delay fuses. The maximum time delay fuse is 175% of drive input current
rating listed in Table 14. This covers any Class J or T fuse.
Table 14 Alternative AC Drive Branch Circuit Protection
Drive Model
Nominal Output Power
kW (HP)
Drive Input Amps/Phase
<1>
Time Delay Fuse Class J or T
Rating Amps Max.
4T0058o
30 (40) 27 45
4T0072o
37 (50) 33 50
4T0088o
45 (60) 39.5 60
4T0103o
55 (75) 48.5 80
4T0139o
75 (100) 65.5 110
4T0165o
90 (125) 78 125
4T0208o
110 (150) 95 150
4T0250o
132 (200) 114 175
4T0296o
160 (250) 137.5 225
4T0362o
185 (300) 158.5 275
4T0414o
220 (350) 188 300
4T0515o
250 (400) 213.5 350
4T0675o
355 (550) 301.5 500
<1> This amp rating is 1/2 rated current because the 3-Phase current is split between 6 input phases for the 6-Phase/12-Pulse drive. Use this amp rating
to select input wiring size as recommended in Table 5.
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Main Circuit Terminal Wiring
Yaskawa recommends using closed-loop crimp terminals on all drive models. To maintain UL/cUL approval, UL Listed
closed-loop crimp terminals are specially required when wiring the drive main circuit terminals. Use only the tools
recommended by the terminal manufacturer for crimping. Refer to Table 15 for closed-loop crimp terminal recommendations.
10 Standards Compliance
86
YASKAWA TOEP YAIP1U 04A YASKAWA AC Drive – P1000 6-Phase/12-Pulse Input Installation Manual
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