11 SM01P
7.2 Input Fusing Requirements
A circuit breaker or a disconnect switch with fuses must be provided in accordance with
the National Electric Code (NEC) and all local codes. Refer to the following tables for
proper ratings:
INPUT FUSE & CIRCUIT BREAKER RATINGS (for installation to UL and EN 60204-1)
120 Vac 1 phase 208/240 Vac 1 phase 208/240 Vac 3 phase 400/480 Vac 3 phase
SM004S 10 A S_204S 10 A
SM005S 15 A S_205S 10 A SM205 10 A SM405 10 A
S_208S 10 A
SM010S 25 A S_210S 15 A SM210 10 A SM410 10 A
SM015S 35 A S_215S 20 A SM215 12 / 10 A SM415 10 A
S_220S 25 / 20 A SM220 15 / 12 A SM420 10 A
S_230S 30 / 25 A SM230 20 / 15 A SM430 10 A
SM250 30 / 25 A SM450 15 / 12 A
SM275 45 / 40 A SM475 20 / 20 A
SM2100 50 / 50 A SM4100 30 / 25 A
SM2150 80 / 75 A SM4150 40 / 35 A
NOTE
• Applicable national and local electrical codes take precedence over
recommendations in these tables.
• Use UL Class CC fast-acting, current limiting type fuses. Select fuses with low
I
2
T values, rated at 200,000 AIC. Recommended fuses are Bussman KTK-R,
JJN, and JJS. Similar fuses with equivalent ratings by other manufacturers may
also be acceptable.
WARNING!
This product can cause a DC current in the protective conductor. Where a residual
current device (RCD) is used for protection in case of direct or indirect contact, only
an RCD of Type B is allowed on the supply side of this product. Otherwise, another
protective measure shall be applied, such as separation from the environment
by double or reinforced insulation, or isolation from the supply system by a
transformer.
Observe the following when using RCDs:
1. Only install the RCD between the supply mains and drive controller.
2. The RCD can be activated by:
- capacitive leakage currents between the cable screens during operation
(especially with long, screened motor cables)
- connecting several drives to the mains at the same time
- additional RFI filters
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