5 6
S V E R K E R 7 5 0 / 7 6 0
P r o g r a m m a E l e c t r i c A B
Z P - C D 0 1 E R 0 5 A
Operating function: 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
I > ON + TIME DELAY
value from
the Sverker display window.
7.
For the remaining phases, repeat the steps
1-6 as set forth above.
Pick-up and drop-out fu
nctions for
the high-current stage: I >> ON and
I >> OFF
1.
Move the connections to the desired
current output.
2.
Select the desired test point for the amme-
ter. This can be done step by step with the
A button located to the right of the display
window.
3.
If the protective relay equipment has a
separate trip output for I >>, connect it to
the timer stop input (STOP) after having
disconnected the trip output of I >.
4.
Turn on the Sverker current source using
the start switch, whereupon the ON indica-
tor lamp will light.
5.
Increase the current rapidly until the equip-
ment operates (I >> ON), whereupon the
Sverker TRIP indicator will start to glow
steadily.
6.
Read the
I >> ON
value from the display
window.
current circuit in series. Moreover, resis-
tors can be connected into the Sverker Rx/
Cx terminal.
2.
Turn on power to Sverker using the mains
switch.
3.
Move the ammeter test point to the de-
sired current output. When measuring low
currents, less than 6 A, use the separate
ammeter input for better accuracy. This
can be done step by step with the A button
located to the right of the display window.
When a test point is selected, its indicator
lamp lights.
4.
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.
5.
If the display window is to freeze the
current reading at the instant of operation,
check to see that the HOLD function is
active (it can be activated by means of the
HOLD button).
Pick-up and drop-out functions: I >
ON and I > OFF
1.
Turn on the Sverker current source by
activating ON with the start switch (press
the
t
key once), whereupon the ON indica-
tor lamp will light.
2.
Increase the current carefully by turning the
main knob until the protective relay equip-
ment operates (I > ON), whereupon the
Sverker TRIP indicator will start to glow
steadily.
3.
Read the
I > ON
value from the Sverker
display window.
4.
If the freeze function has been activated,
press the HOLD button twice to unfreeze
the value shown.
5.
Decrease the current until drop-out occurs
(I > OFF), whereupon the TRIP indicator will
be extinguished.
6.
Read the
I > OFF
value from the Sverker
display window.
7.
Decrease the voltage to 0.
8.
Turn off the Sverker current source by
setting the start switch to the OFF position.
Summary of Contents for Programma Sverker 750
Page 1: ...SVERKER 750 760 User s manual Relay Test Unit ...
Page 28: ...2 9 S V E R K E R 7 5 0 7 6 0 P r o g r a m m a E l e c t r i c A B Z P C D 0 1 E R 0 5 A ...
Page 75: ...7 6 S V E R K E R 7 5 0 7 6 0 P r o g r a m m a E l e c t r i c A B Z P C D 0 1 E R 0 5 A ...
Page 76: ...Subject to change without notice Printed matter ZP CD01E R05B 2007 ...