Protective Elements
Commissioning: Inrush
Dependent on the parameterized inrush-blocking-mode (
»
1-ph Blo or 3-ph
Blo«), the test procedure is different.
For mode
»
1-ph-Blo« the test has to be carried out first for each individual
phase and then for all three phases together.
For mode
»
3-ph-Blo« the test is a three-phase one.
Object to be tested
Test of inrush blocking
.
Necessary means
three-phase current source with adjustable frequency
three-phase current source (for the first harmonic)
Procedure (dependent on the parameterized blocking mode)
Feed the current to the secondary side with nominal frequency.
Feed abruptly current to the secondary side with double nominal frequency. The amplitude must exceed the
preset ratio/threshold
»
IH2/IN«.
Ascertain that the signal »I
NRUSH
A
LARM
« is generated now.
Successful test results
The signal »I
NRUSH
A
LARM
« is generated and the event recorder indicates the blocking of the current protection
stage.
452
MRI4
DOK-HB-MRI4-2E
Summary of Contents for highprotec MRI4
Page 1: ...Manual Feeder Protection MRI4 Software Version 3 4 a DOK HB MRI4 2E Revision C English...
Page 43: ...Installation and Connection 43 MRI4 DOK HB MRI4 2E...
Page 46: ...Installation and Connection Ensure the correct tightening torques 46 MRI4 DOK HB MRI4 2E...
Page 69: ...Navigation Operation Navigation Operation 69 MRI4 DOK HB MRI4 2E 1 2 3 5 7 6 8 10 9...
Page 353: ...Device Parameters 353 MRI4 DOK HB MRI4 2E...
Page 373: ...373 MRI4 DOK HB MRI4 2E...