KEPCO TBC 12-50M, Руководство оператора

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TBC OPR 071019
2-5
FIGURE 2-4. AC INPUT POWER TERMINAL BLOCK, TB3
2.4 COOLING
The power transistors and rectifiers in the TBC Battery Charger Power Supply are maintained
within their operating temperature range by means of special heat sink assemblies, cooled by
internal fans.
CAUTION: SIDE PANEL OPENINGS AND THE TOP OF THE CASE MUST BE KEPT
CLEAR FROM OBSTRUCTIONS TO ENSURE PROPER AIR CIRCULATION.
Periodic cleaning of the interior of the Power Supply is recommended. If the TBC unit is rack
mounted, or installed in confined spaces, care must be taken that the ambient temperature (the
temperature immediately surrounding the Power Supply) does not rise above the limit specified
(refer to Table 1-3).
2.5 GROUNDING
WARNING: For safety reasons it is imperative that the chassis of the power supply be
returned to AC ground with a separate lead. A grounding terminal is pro-
vided (on Terminal Block TB3) for this purpose.
a. Terminal Block TB3 on the Chassis Assembly has three terminals: Ground, Neutral and
High. The Ground terminal is a chassis ground, and is not the logic ground, nor the
Common found on PC Board 1 and pin 10 of Terminal Blocks 1 and 2 (see Figure 2-3).
b. Isolation From Ground. The DC output is isolated from the AC source and from any
direct connection to chassis or ground. The maximum output voltage that can be sup-
ported between either output terminals and ground or chassis is 500V d-c. Either side of
the output may be connected to chassis or Earth ground
2.6 CIRCUIT BREAKER LOCKING PLATE
A locking Plate for the Circuit Breaker is provided to prevent accidental turn OFF of the TBC
unit. It does not affect the circuit breaker tripping action in the event of overload.
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