Apc VS 50 User Manual download pdf (Page 15)

Magnum VS –48 Vdc User’s Manual Page 10

3.7. Load Protection Installation

Circuit Breaker Installation

Standard circuit breaker output boards are available with two 30-A breakers or one 60-A

breaker. Output boards are installed at the factory and are generally not field replaceable units.

Contact APC if the output configuration is not suitable for your needs. Other breaker sizes are

not readily available.

GMT Fuse Installation

Fuse holders that accommodate GMT fuses are located on the front panel on the left side of the

unit. Insert the fuse in the holder; observing the tripped indicator is correctly oriented. Use the

chart shown in Figure 3.7-1 to help determine what size fuses will carry the desired current.

When using several of the larger GMT fuses in one shelf, better heat dissipation will be

achieved if the fuses are spaced out evenly within the output panel. A list of GMT type fuses

available from APC is provided in Figure 3.7-3.

AMBIENT TEMPERATURE

20° C 50° C 60° C

7.5 A 5 A 4.5 A 4 A

10 A 7 A 6 A 5 A

FUSE

SIZE

15 A 10 A 9 A 8 A

Figure 3.7-1 GMT Fuse Temperature De-rating Chart

GMT Fuses

FUSE RATING PART NUMBER FUSE RATING PART NUMBER

¼ A FFA-0030 3 A FFA-0036

½ A FFA-0031 5 A FFA-0037

3/4 A FFA-0032 7½ A FFA-0029

1 A FFA-0033 10 A FFA-0038

1¼ A FFA-0039 15 A FFA-0040

1½ A FFA-0035

Figure 3.7-3 GMT fuses available from APC

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 64 65

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Apc VS 50 User Manual Page 15