Eaton POWERWARE Plus 18, Руководство пользователя

Страница: 149 / 311

18 and
7.1.6 Thermistor
The temperature. is sensed in two places in the unit. The main sensing is located on
heat sink assembly in
FRU. The second sensing is located on the power
supply directly in front of fan. A thermistor is used for fast warning of conditions
such as fan failure. The detection for a power supply failure a quicker response
for an heat failure. The
can also detect fan failure if the
is under no load. The following voltages should be measured for the temperatures of
the
Surface temperature
of thermistor
c
c
Power Supply
Voltage Level
9.5%
10.4%
VDC 11.4%
1.55 VDC 12.7%
- - - - - - - -
I I I
i i
I
I I
I I
I
I I I
i
i
I I I
I
I
I
I
I
Figure 7-1
SCR) Gate
Signal
ELECTRONICS
7-3