Operating Instructions

SED2 Conventional Bypass Option Operating Instructions
50 Siemens Building Technologies, Inc.
Fuses
Verify that 120 Vac power is available on the secondary side of the Conventional Bypass Option
power transformer. If power is not proper, check the Conventional Bypass Option components,
such as:
• Power transformer
• Power transformer fuses (F1, F2, and F3). Table 8 provides fuse replacement
information.
Table 8. Fuse Replacement Information.
Bypass Option Part Number Primary Fuse (F1 and F2) Secondary Fuse (F3)
VBA10.5… to VBA17.5… Bussmann/Littlefuse LP-CC-1 Bussmann/Littlefuse LP-CC-6/10
VBA110… to VBA110… Bussmann/Littlefuse LP-CC-2 Bussmann/Littlefuse LP-CC-1 1/4
VBA115… to VBA160… Bussmann/Littlefuse LP-CC-3 Bussmann/Littlefuse LP-CC-2
VBA20.5… to VBA27.5… Bussmann/Littlefuse LP-CC-1 Bussmann/Littlefuse LP-CC-6/10
VBA210… to VBA210… Bussmann/Littlefuse LP-CC-2 Bussmann/Littlefuse LP-CC-1 1/4
VBA215… to VBA260… Bussmann/Littlefuse LP-CC-3 Bussmann/Littlefuse LP-CC-2
VBA30… to VBA315… Bussmann/Littlefuse LP-CC-1/2 Bussmann/Littlefuse LP-CC-6/10
VBA320… to VBA320… Bussmann/Littlefuse LP-CC-1 Bussmann/Littlefuse LP-CC-1 1/4
VBA325… to VBA3125… Bussmann/Littlefuse LP-CC-1 1/2 Bussmann/Littlefuse LP-CC-2
VBA40… to VBA420… Bussmann/Littlefuse FNQ-R-4/10 Bussmann/Littlefuse LP-CC-6/10
VBA425… to VBA425… Bussmann/Littlefuse LP-CC-8/10 Bussmann/Littlefuse LP-CC-1 1/4
VBA430… to VBA4125… Bussmann/Littlefuse LP-CC-1 1/4 Bussmann/Littlefuse LP-CC-2