Thermal shutdown in critical conditions
This protective scheme allows for any overload that the input could be
confronted with during normal operation. For any other failure that could result
in excessive heat dissipation, the GEN series mainframe has a last protective
stage built in. When local temperatures reach critical limits, the system
automatically turns off the mains power to prevent damage to the system or
other systems near the GEN series system. Maximum and critical temperatures
are defined as such that it is very unlikely the system would ever reach these
critical temperatures when operating within its specified conditions.
Measure local
Temperature
> 100°C ?
> 90°C ?
> 85°C AND
Signal overload ?
< 80°C AND
Protection active ?
no
no
no
Report Amplifier
OverTemperature
Activate GND
relay
yes
Increase input
range by factor 10
Currently at
2kV range?
yes
yes
no
Restore GND
relay and input
range
yes
no
Wait 2 seconds
Shutdown the
complete system
Activate GND
relay
Add TimeMark to
recording file
Add TimeMark to
recording file
Add TimeMark to
recording file
Add TimeMark to
recording file
yes
Figure 12.23:
Automatic thermal overload response
GEN3i
I3763-3.1 en HBM: public
237
