LEESON SM Series Sub-Micro Inverters User Manual
Page 13
9
7.2
INPUT FUSING AND DISCONNECT 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 fuse/circuit breaker
ratings and wire sizes.
FUSE, CIRCUIT BREAKER, AND WIRE SIZES (for installation to UL and EN 60204-1)
NOTE 1: Use UL Class CC fast-acting, current limiting type fuses. Select fuses with low 1
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.
NOTE 2: When using a pulse-current or universal-current sensitive ELCB (earth leakage circuit
breaker), the detection level must be rated 30mA or greater. Observe the following when using
ELCBs:
1. Only install the ELCB between the supply mains and drive controller.
2. The ELCB 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
INPUT FUSE & CIRCUIT BREAKER RATINGS
120 Vac 1 phase
208/240 Vac 1 phase
208/240 Vac 3 phase
400/480 Vac 3 phase
174263
10A
174267
10A
174264
15A
174268
10A
174274
10A
174281
10A
174265
25A
174270
15A
174276
10A
174282
10A
174266
35A
174271
20A
174277
12/10A
174283
10A
174272
25/20A
174278
15/12A
174284
10A
174273
30/25A
174279
20/15A
174286
10A
174288
30/25A
174287
15/12A
174280
45/40A
174285
20/20A
174290
50/50A
174291
30/25A
174292
80/75A
174293
40/35A
INPUT WIRE SIZE REQUIREMENTS
120 Vac 1 phase
208/240 Vac 1 phase
208/240 Vac 3 phase
400/480 Vac 3 phase
MODEL AWG mm
2
MODEL AWG mm
2
MODEL AWG mm
2
MODEL AWG mm
2
174263
14
1.5
174267
14
1.5
174264
14
2.5
174268
14
1.5
174274
14
1.5
174281
14
1.5
174265
12
4.0
174270
14
2.5
174276
14
1.5
174282
14
1.5
174266
10
4.0
174271
14
2.5
174277
14
1.5
174283
14
1.5
174272
12
4.0
174278
14
2.5
174284
14
1.5
174273
10
4.0
174279
14
2.5
174286
14
1.5
174288
12
4.0
174287
14
2.5
174280
8
6.0
174285
12
2.5
174290
8
10
174291
10
4.0
174292
8
16
174293
8
6.0