59
SVERKER 750/760
Programma Electric AB
ZP-CD01E R05A
(the resistor you select will depend on the
testing current) to the current input (NI) to
the protective relay equipment.
d. Connect the timer stop input (STOP) to
the relay trip output.
2. Turn on power to Sverker using the mains
switch.
3. Activate the desired stop condition for the
timer by setting the stop input for a make
and/or break function and for a wet or dry
contact.
4. Transfer the ammeter test point to the
panel input, whereupon its indicator lamp
will light. This can be done step by step
with the A button located to the right of the
display window.
5. Select the desired voltage range (0-60 or 0-
120 V) for the separate AC output by
pressing the button at left beneath the
output.
6. Activate the separate AC voltage output by
pressing the button at right beneath the
output
Pick-up and drop-out functions: I >
ON and I > OFF
1. Increase the voltage using the small knob
until U > is exceeded. If the protective relay
equipment has no adjustable voltage
function (U >), set the voltage to the value
same as a fault voltage. Keep this voltage
constant during the remainder of the test.
It is not necessary to test the U-ON and U-
OFF voltage limits. It may, however, be
desirable to test I > ON and I > OFF at
different voltage levels.
2. Turn on the Sverker current source by
activating ON with the start switch (press
the ? key once), whereupon the ON indica-
tor lamp will light.
3. Increase the current until the protective
relay equipment operates (I > ON), where-
upon the Sverker TRIP indicator will start to
glow steadily.
4. Read the I > ON value from the display
window. If the protective relay equipment
fails to operate, reverse the polarity of the
voltage circuit.
5. If the freeze function has been activated,
press the HOLD button twice to unfreeze
the value shown.
6. Decrease the current until drop-out occurs
(I > OFF), whereupon the TRIP indicator will
be extinguished.
7. Read the I > OFF value from the display
window.
8. Decrease the current to 0. 9. Turn off the
Sverker current source by setting the start
switch to the OFF position.
Operating time: I > ON + TIME
DELAY
1. Turn on the Sverker current source by
setting the start switch to the ON position,
whereupon the ON indicator lamp will light.
2. Increase the current to 1.5 x I > ON. (For
an inverse time relay, you should conduct
three tests at 1.5, 2 and 3 x I > ON, thus
providing additional test points on the
inverse time curve.) 3. Turn off the Sverker
current source by setting the start switch to
the OFF position.
4. Activate ON + TIME by means of the start
switch, whereupon the timer will start and
the current source will start to generate
current.
5. When the protective relay equipment
operates, the timer will stop automatically
and the current source will be turned off
automatically, whereupon the TRIP indica-
tor will start to flash.
6. Read the ON + TIME DELAY value from the
Sverker display.
Pick-up and drop-out functions: U >
ON and U > OFF
1. Decrease the voltage using the small knob
until the voltage drops beneath U.
2. Turn on the Sverker current source using the
start switch, whereupon the ON indicator
lamp will light.
3. Increase the current with the main knob until
I > ON is exceeded (more than 1.1-1.2 x I
> ON).
4. Increase the voltage using the small knob
until the <%-2>protective relay equipment
operates (U > ON), whereupon the Sverker
TRIP indicator will start to glow steadily.
5. Read the U > ON value from the display
window.
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