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8
Instruction Booklet
IB019013EN
Effective March 2019
Zone selective interlocking test kit
For Digitrip 520M, 520MC and 1150 trip units
EATON
www.eaton.com
**Configuration 5 and 6 only need to be tested when there is a 6 diode arrangement.**
ZSI
Test
Box
Zone 1
Zone 2
Zone 3
Main1 Digitrip
Main2 Feeder Digitrip
Configuration 5
Simultaneous
Main Fault
Main2 Digitrip
Configuration 5
Arrangement
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)
Simultaneous main fault: This simulates
simultaneous faults. One originates on the
load side of the main 2 breaker before the tie
and the other originates on the load side of
the main 1 feeder.