System Fuses (MMS System Cabinet)
The System cabinet contains external source sync and the fuses for the transformer.
The left panel of the cabinet holds two fuse blocks. One block is for the external source sync option if the option is present. The other block is for the transformers in the cabinet.
The right panel of the cabinet holds the fuses for the static switch if that option is present. Also, the right panel holds a fuse for the neutral ground reference if the system is 4-wire.
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| Illustration 1 | g01271421 |
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Location of the fuses on the left panel (1) Fuses F4-F6 (2) Fuse F7-F12 | |
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| Illustration 2 | g01271422 |
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Location of the fuses on the right panel (3) Fuses F1-F3 (4) Fuses F18 | |
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| Fuse | Component |
| F1 | Static Switch Assembly Phase A(1) |
| F2 | Static Switch Assembly Phase B(1) |
| F3 | Static Switch Assembly Phase C(1) |
| F4 | External Source Sync Phase A (1) |
| F5 | External Source Sync Phase B(1) |
| F6 | External Source Sync Phase C(1) |
| F7 | T1 Transformer Primary Input |
| F8 | T1 Transformer Primary Return |
| F9 | T2 Transformer Primary Input |
| F10 | T2 Transformer Primary Return |
| F11 | T3 Transformer Primary Input |
| F12 | T3 Transformer Primary Return |
| F18 | 4-Wire Zig Zag Neutral Reference (2) |
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| (1) | Option |
| (2) | 4-Wire Only |
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| Illustration 3 | g01271494 |
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Left panel fuse wire connections | |
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| Illustration 4 | g01271495 |
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Right panel fuse wire connections | |
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