24 ANSI MEDIUM VOLTAGE METAL-CLAD DIGITAL SWITCHGEAR
• Step 6/7
Check current metering for the phase and
measured current in other phases on the
protection relay LHMI Measurements view.
Current must be zero in phases which are not
under the primary injection test
Notice: Protection functions trip the signal block
Tripping coil supervision function.
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39
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39 Measurements view
Notice: “Io-A” in Measurements view is a
measured value, not a calculated one.
• Step 7/ 7
After testing of all 3 phases, install the main bus
compartment barrier.
• Step 5/7
Inject current equal to the application nominal
current or equal to the maximal current
supported by the primary testing device if the
application nominal current is out of the device
setting range.
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