5 7
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
7.
If the freeze function has been activated,
press the HOLD button twice to unfreeze
the value shown.
8.
Decrease the current until drop-out occurs
(I>> OFF), whereupon the TRIP indicator will
be extinguished.
9.
Read the
I >> OFF
value from the display
window.
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 1.1-1.2 x I >> ON.
3.
Turn off the Sverker current source by
setting the start switch to the OFF position.
4.
Activate ON + TIME using the start switch,
where-upon the timer will start and the
current source will start to generate cur-
rent.
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.
Finishing the test
• Enter the values read from the display into
the test report.
• Turn off power to Sverker using the mains
switch.
• Disconnect the equipment.
7.3 Testing directional
over-current relay
systems or directional
ground-fault (earth-
fault) relay systems
Sverker 760
The following functions are to be tested:
• Pick-up functions: I > ON and U > ON
• Drop-out functions: I > OFF and U > OFF
• Operating time: I > ON + TIME DELAY
Test hookup and initial settings
1.
Connect for testing as shown in the above
diagram.
a. Connect the Sverker separate 0-130 V
AC voltage output to the protective relay
equipment input (U).
b. Also connect the Sverker separate AC
voltage output to the voltmeter input.
c. Connect the Sverker current source, via
the ammeter input and the set of resistors
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 ...