10
Instruction Booklet
IB019013EN
Effective March 2019
Zone selective interlocking test kit
For Digitrip 520M, 520MC and 1150 trip units
EATON
www.eaton.com
Test screen
The “Test Screen” button will take you to the main testing screen
where all the tests will be performed. The screen gives the user
options to select what system and test to perform, as well as
options to navigate to other useful screens for reference information
such as test sequence. You can find a detailed description and expla-
nation of the elements in the testing screen in Table 5: Test screen
elements.
Table 5. Test screen elements
1: This area of the screen describes whether or not the test is ready to be
performed. If the test indicates not ready to test, simply press the reset test
button. If it will not reset, check the ZSI test plugs and their connections to the
trip units.
2: This area of the screen shows the test zone configurations that are valid based
on your selections made on the screen (See 4 and 5).
3: This area of the screen shows the state of the breakers after a test. 3a shows a
tripped breaker and 3b shows a non-tripped breaker. The method of monitoring
internal trip commands on the trip unit may not match the true state of the
breaker. The test can be done with breakers open or closed. The lightning bolt
shown in 3c indicates what breaker(s) the fault is flowing through.
3a:
3b:
3c:
4: This area of the screen is where the buttons are that allow a user to test
specific fault locations based on the arrangement selected (single or double
ended, see 5).
5: This area of the screen is where buttons are that allow a user to change the
arrangement of the switchgear lineup being tested.
6: After a test is performed, this area displays a timer that is relative and useful
when troubleshooting any issues related to the wiring of the test box. These are
not true trip times, but can be used to determine ZSI functionality.
7: This is the area where the test results will be displayed. 7a indicates a passed
Zone 1 test and 7b indicates a failed test. When a test fails, the reason for
failure as well as guidance towards correcting the issue will be displayed below
the test failed message. 7c is an example of a failed single ended arrangement
test with a fault on the feeder with a missing restraint jumper.
7a:
7b:
7c:
Log screen button
The “Log Screen” button will take you to the log screen where the
test results will be automatically recorded and displayed.
Copying test results to a flash drive
1. Enter test information in the “Lineup Designation” and “Lineup
Tester” fields. The above example shows Lineup 1 and John
Doe.
2. Insert a flash drive into the USB port on the front side of the
tester box, located below the power switch.
3. Press the “Copy Log to USB” button on the display screen.
Clearing the test log
1. Press the “Clear Log” button on the display screen to remove
the tests displayed on the log screen.
Repeating a test
1. To repeat a test that has already been recorded on the log
screen, enter the desired test number in the “Test # Input” field.
2. Press the “Test Screen” button to display the test screen.
3. Perform the desired test. *
* Remember to navigate to the next desired test afterwards, or
overwrite of subsequent tests will occur. The log screen cannot
store more than 40 tests.
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