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1.4
Displayed Values and Messages
1.4.1
Displayed Values
The PCU1 display simultaneously shows the injected test current, the loading unit metering
range full scale, the timer result, the selected auxiliary input value and quantity (SP models
only), and the state of the output on a liquid crystal display. It also displays warning and error
messages, detailed in the following section.
PCU1-SP
Output current
FS of loading unit range
Timer
3000.A 5kA 0.000s
3000.:5A 5.000A
Auxiliary metering
PCU1-LT
Output current
FS of loading unit range
Timer
3000.A 5kA 0.000s
Figure 1.4 Normal values displayed on screen
1.4.2
Warning Messages
In addition to the normal display screens, the PCU1 systems can display a range of warning
messages if the unit trips on over-current or duty cycle or is too hot internally. If an over
current or duty cycle trip occurs, the green ‘off’ pushbutton must be pressed to clear the trip
condition. If the unit trips on over temperature, the unit will automatically reset when the
temperature falls to an acceptable level. If the unit is over temperature, switching the unit off
and back on will not clear the message – the unit must be allowed to cool.
Output Tripped
Press Green to Reset
Figure 1.5 Over-current trip warning message
Duty Cycle Trip
Press Green to Reset
Figure 1.6 Duty cycle trip warning message
Over Temperature
Output Disabled
Figure 1.7 Unit over temperature warning message
