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Instruction Booklet 

IB019013EN

Effective March 2019

Zone selective interlocking test kit 

For Digitrip 520M, 520MC and 1150 trip units 

  

EATON

 www.eaton.com

Read before operating

The ZSI tester was designed to work with prescribed Digitrip 

settings and requires specific connections from the test box to 

the breakers under test.  If these are not followed, the test will be 

invalid and you will get unexpected results.

The ZSI tester will not work with 520 trip units.  It will only 

work with 520M, 520MC and 1150 trip units in Magnum DS 

breakers.

Setting the Digitrip time and multiplier set-

tings

The ZSI test box can only accurately test the ZSI wiring scheme if 

each one of the Digitrips being tested are configured with the appro-

priate time and multiplier settings. These settings are shown in the 

tables below, Tables 1 and 2: Digitrip settings, as well as through the 

“DIGITRIP SETTINGS” button on the startup screen. For instruction 

on how to navigate to these settings on your Digitrip unit consult 

Table 3: Setting locations, and the Digitrip manuals: IL70C1037H05, 

and IL70C1036H06.

Table 1.  Digitrip 1150+ settings

Parameter

Setting

LSIG

On

Long slope

I2T

Long PU

0.4 sec

Long time @ 6 X I

r

2.0 sec

Long memory

Off

Short slope

Flat

Short PU 

3 X Ir

Short time

*Depends on zone:  

  Z1 = 0.5 sec;  

  Z2 = 0.3 sec;   

  Z3 = 0.10 sec

Inst PU

4 x In

Gnd PU

0.3

Ground slope

Flat

Ground time

0.3 sec

Amp unbalance

Off

Amp unbalance time

10 sec

Phase loss

OFF

Main PU

10 x In

Maintenance mode

Disabled

Frequency

60 HZ

BC relay reset

Auto

Sliding demand

Off

Wave form capture

Off

Rev power sensing

Disabled

Table 2.  Digitrip 520M, 520MC settings

Parameter

Setting Parameter

Setting

Long delay setting

0.4

Long delay time @ 6xl

r

2

Short delay setting

3

Short delay time 

*Depends on zone:  

  Z1 = 0.5 sec;  

  Z2 = 0.3 sec;   

  Z3 = 0.10 sec

Instantaneous setting OFF

Ground setting

0.4

Ground time

0.3

Arc flash reduction 

setting

R5

Arc flash reduction

OFF

*Assuming Z1 is connected to main, Z2 is directly downstream of Z1, and Z3 is directly 

downstream of Z2.

Table 3.  Settings locations

Digitrip 

unit

Location

Settings 

520M   

520MC

Rotary switches on 

front of Digitrip unit

Long delay setting, long delay time, short delay 

setting, short delay time, instantaneous setting, 

ground setting, ground time, arc flash reduction 

setting, arc flash reduction

1150+

PGM set 

current

Curve type, long slope, long pu, long time, long 

memory, short slope, short pu, short time (all zones), 

inst PU, GND PU, ground slope, ground time, amp 

unbalance, amp unbalance time, phase loss

1150+

PGM set 

system

Main PU, maintenance mode, frequency, BC relay 

reset, sliding demand, wave form capture, rev power 

sensing

Setup procedure 

1.  Ensure all Digitrip units have the settings required for ZSI testing. 

Fill out ZSI tester worksheets when a change must be made.  

See the end of this instruction manual for ZSI tester worksheets.

2.  Open the ZSI test kit by releasing the two latches around the 

perimeter of the case.

Summary of Contents for ZSI

Page 1: ...TRICAL PERSONNEL SHOULD BE PERMITTED TO WORK ON THE EQUIPMENT m CAUTION SPECIFIC OPERATING PROCEDURES MUST BE DEVELOPED BY THE RESPONSIBLE PARTY DUE THE UNIQUE APPLICATION AND VAST VARIETY OF SYSTEM AND USER REQUIREMENTS FAILURE TO DEVELOP SPECIFIC PROCEDURES COULD LEAD TO IMPROPER USE OR OTHER MORE SERIOUS CONSEQUENCES m CAUTION PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE ATTEMPTING TO O...

Page 2: ...ound time 0 3 sec Amp unbalance Off Amp unbalance time 10 sec Phase loss OFF Main PU 10 x In Maintenance mode Disabled Frequency 60 HZ BC relay reset Auto Sliding demand Off Wave form capture Off Rev power sensing Disabled Table 2 Digitrip 520M 520MC settings Parameter Setting Parameter Setting Long delay setting 0 4 Long delay time 6xlr 2 Short delay setting 3 Short delay time Depends on zone Z1 ...

Page 3: ... the power cable into the ZSI test box 5 Plug the power cable into a standard 120V outlet 6 Refer to the Test Sequence screen in the Navigating the HMI Screens section to determine which series of tests need to be performed 7 Refer to the Zone Configurations section to determine the correct cable connections for the desired test 8 Plug a ZSI zone cable into one of the zone plugs on the ZSI test bo...

Page 4: ... the correct zone 13 Move the selector switch on the ZSI test box to the ON posi tion 14 Navigate to the Test Screen on the display panel 15 Select Single or Double based on the switchgear configura tion being tested 16 Select Main Fault Tie Fault or Feeder Fault 17 Press the Initiate Test button to start the test 18 After the test is completed press the Reset Test button to prepare the tester for...

Page 5: ...n the selections made on the HMI Circuit diagrams of these setups can be found in the Zone Config screen subsection of the Navigating the HMI Screens section in this manual Note N For M T T M repeat test for each tie breaker ZSI Test Box Zone 1 Zone 2 Zone 3 Main1 Digitrip Tie Digitrip Main2 Feeder Digitrip Configuration 1 Main Tie Main Configuration 1 Arrangement double Main fault This simulates ...

Page 6: ...iguration 2 Main Tie Main Configuration 2 Arrangement double Main fault This simulates a fault originating between the M2 main 2 breaker and the tie breaker Tie fault This simulates a fault originating downstream of the M2 main 2 breaker and tie breaker Feeder fault This simulates a fault originating on the load side of a feeder on the main 1 bus main 1 feeder This fault would flow through main 2 ...

Page 7: ...Main fault This simulates a fault originating on the load side of the main 1 breaker Feeder fault This simulates a fault originating on the load side of the main 1 feeder breaker ZSI Test Box Zone 1 Zone 2 Zone 3 Main2 Digitrip Main2 Feeder Digitrip Configuration 4 Main2 Main2 Feeder Configuration 4 Arrangement single Main fault This simulates a fault originating on the load side of the main 2 bre...

Page 8: ...double main opposite feeder Simultaneous main fault This simulates simultaneous faults One originates on the load side of the main 1 breaker before the tie and the other originates on the load side of the main 2 feeder ZSI Test Box Zone 1 Zone 2 Zone 3 Main2 Digitrip Main1 Feeder Digitrip Configuration 6 Simultaneous Main Fault Main1 Digitrip Configuration 6 Arrangement double main opposite feeder...

Page 9: ...ections Once the check box has been selected the Test Screen button becomes visible Digitrip settings screen The Digitrip Settings button will take you to the Digitrip settings screen shown below Here you can select which Digitrip model you are testing and find all of the settings required to be enabled on the trip units in order to successfully test them using the ZSI test box Zone configuration ...

Page 10: ...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 r...

Page 11: ...p plugs are installed in correct breakers Single double feeder tie Z1 tripped during Z2 test Check trip unit settings and ZSI configuration map to ensure trip plugs are installed in correct breakers Double tie Z3 tripped during Z2 test Check trip unit settings and ZSI configuration map to ensure trip plugs are installed in correct breakers Z3 error messages Double feeder fault Z3 trippped too slow...

Page 12: ...______________________________ Ground time 0 4 ________________________________________ Arc flash reduction off __________________________________ Arc flash reduction setting R5 ___________________________ Long delay time 6xlr 2 ________________________________ Breaker Name _______ Breaker Position ________ Setting required for testing Original setting Setting required for testing Original setting...

Page 13: ...__________________ Inst PU 4 x ln ___________________________________________ Wave form capture off __________________________________ Gnd PU 0 3 ____________________________________________ Rev power sensing disabled _____________________________ Breaker name __________ Breaker position ___________ Setting required for testing Original setting Setting required for testing Original setting Curve t...

Page 14: ...ractual agreement between Eaton and the purchaser THERE ARE NO UNDERSTANDINGS AGREEMENTS WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF EATON THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY...

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