Installation and Operating Instructions - Crompton Instruments
Installation and Operating Instructions - Crompton Instruments
Installation and Operating Instructions - Crompton Instruments
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Summary of the new relay settings<br />
You should now have set the product as follows:<br />
Relay 1<br />
Trip Over Volts 59<br />
Caption 59<br />
Logged<br />
N<br />
Latched<br />
N<br />
Alarm<br />
Y<br />
Failsafe<br />
Y<br />
TripPoint 120.0<br />
Diff<br />
3.0 V<br />
TimeDelay<br />
1.0 Sec<br />
Testing Relay 1<br />
Now you are ready to test the relay Alarm function.<br />
With no measuring signal input, the relay should not be tripped. Confirm that Relay 1 contact is<br />
energised (Failsafe)<br />
Apply a variable AC voltage source to the input, <strong>and</strong> slowly increase the voltage.<br />
Note that the SPR is checking each phase for a voltage greater than 120 V.<br />
Once the voltage exceeds 120 V, the<br />
relay will trip, <strong>and</strong>, because the alarm<br />
function is enabled on Relay 1, the LCD<br />
backlight will flash on <strong>and</strong> off to attract<br />
attention.<br />
The * symbol indicates that Relay 1<br />
caused the alarm condition.<br />
Now decrease the voltage below 117 V.<br />
The relay contacts will reset, but the<br />
display will continue to flash. You must<br />
acknowledge the alarm to stop the<br />
display flashing, by pressing the<br />
Enter button.<br />
36
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