APC VS 50 User Manual

Magnum VS –48 Vdc User’s Manual 

                                     

  Page 10 

 
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. 
 

20

°

 C 

50

°

 C 

60

°

 C 

7.5 A 

5 A 

4.5 A 

4 A 

10 A 

7 A 

6 A 

5 A 

 

15 A 

10 A 

9 A 

8 A 

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