| Pimary | Secondary |
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Fan Board | Fan Board |
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to Cable A | to Cable A |
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| Surge Arrestor | |
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| Board for top Shelf | |
Door |
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Ground |
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Braid |
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| Door Gasket | |
Gas Tube |
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Extractor |
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Pliers |
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| Rear Door | A, B, and Spare | Surge Arrestor Board | ||
| Switch | ||||
Rear Door | for bottom Shelf | ||||
Cable Penetrations | |||||
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Retainer |
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| Ground | Connecting lug on | |||
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| Buss | ( cabinet bottom ) | ||
Figure 2. Cabinet Assembly, Rear View
OPEN
23" |
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Front door |
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20 7/16" |
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C/C |
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View is looking down with top cut away. |
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Mounting bolt hole center lines are 1 5/8" in from each edge. |
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Ground stud is 1 5/8" from rear edge. |
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Measurements shown are center to center (C/C). |
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Door width includes locking flange. |
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Cable penetrations are 1 7/8" in diameter. |
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Cabinet is 27" high not including cable stubs. | 13 3/4" 20" | |
17" Pad mount brackets are 18" high. | ||
Dimensions are tape rule derived and measured from | C/C | overall |
outside the cabinet. |
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5 3/4" 3 1/4" cable dimensions +/- 1/8"
2 1/2" C/L
Ground
Lug
A | B | spare |
Rear door
23 5/8"
overall
OPEN 
Figure 3. Top View Cutaway With Installation
Measurements
Fan Operation and Indication
Two thermostatically controlled line powered cooling fans limit heat buildup. The primary fan energizes at about 110° F. The secondary fan energizes at about 150° F.
Primary and secondary fan board operation is monitored by the FPU. The following conditions cause an alarm at the FPU:
•Any fan or fan board not receiving power.
•Secondary fan turning On.
•Open cabinet door.
The single FPU at the CO has a separate power supply for each fan board. The FPU fits into one slot of the E220
The FPU is purchased separately. Information on fan board operation and testing is in Section 3. For additional details on the FPU refer to I&M Practice:
Section | 3 |