Table 3-2. fault detector operation, 3 overtemp status flags, 4 fanfail status flags – KEPCO HSM Series User Manual
Page 34: Overtemp status flags -10, Fanfail status flags -10, Fault detector operation -10
3-10
HSMSERIES OPR 052912
Table 3-2 provides an operating matrix of the output status function; see Figure 3-6 for timing
relationships. The output voltage fault limits are ±5% of programmed output voltage, while the
undercurrent fault limit is <70% of required module current; signal reset requires output voltage
recovery to within the specified ±1% regulation range and/or module current recovery to >85%
of required module current, respectively.
3.14.3
OVERTEMP STATUS FLAGS
This fault is generated in the event that either the input or output module heatsink temperature
rises above a safe operating level; output regulator shutdown occurs simultaneously. Recovery
occurs automatically upon reduction of internal temperatures to normal levels.
3.14.4
FANFAIL STATUS FLAGS
This fault is g
enerated in the event of a failure of the internal cooling fan; a delay of approximately 5 sec-
onds is incorporated to prevent nuisance indications at turn-on. Reset occurs when fan operation
resumes.
TABLE 3-2. FAULT DETECTOR OPERATION
UNDERVOLTAGE
UNDERCURRENT
OVERVOLTAGE
DCFAIL STATUS
N
N
N
OFF
Y
X
*
ON
N
Y
N
ON
*
N
Y
ON
*
Y
Y
OFF
Y = YES; N = NO; X = DON'T CARE; * = EXCLUDED BY ANOTHER ASSUMED CONDITION