Supervision
Phase Sequence Supervision
The device calculates the phase sequence at each CT and VT (based on positive-sequence and negative-
sequence components). The calculated phase sequence (i. e. „ACB“ or „ABC“) is permanently compared with the
setting that has been made at [Field Para/General Settings]
»Phase Sequence«.
The menu [Operation/Status Display/Supervision/Phase Sequence] contains a specific (warning) signal for each CT
and VT. If the check of a CT / VT finds that the actual phase sequence is different from the setting under [Field
Para] then the respective signal becomes true (active).
The phase sequence supervision is especially useful during commissioning of the device because it helps making
sure that the
»Phase Sequence« setting under [Field Para] is correct
The supervision requires minimum values for the current (in case of a CT), or
for the voltage (in case of a VT, respectively), otherwise the phase sequence
cannot be reliably determined.
•
For a VT: The minimum voltage is 0.1⋅V
n
.
•
For a CT: The minimum current is 0.1⋅I
n
.
1092
MCDLV4
DOK-HB-MCDLV4-2E
Summary of Contents for HighPROtec MCDLV4
Page 3: ...Order Code Order Code 3 MCDLV4 DOK HB MCDLV4 2E...
Page 47: ...Installation and Connection 47 MCDLV4 DOK HB MCDLV4 2E...
Page 164: ...Input Output and LED Settings 164 MCDLV4 DOK HB MCDLV4 2E...
Page 433: ...Parameters 433 MCDLV4 DOK HB MCDLV4 2E...
Page 457: ...Device Parameters 457 MCDLV4 DOK HB MCDLV4 2E...
Page 473: ...Blockings 473 MCDLV4 DOK HB MCDLV4 2E...
Page 988: ...Protective Elements 988 MCDLV4 DOK HB MCDLV4 2E P P Q P Q P Q Q Q P S S...
Page 989: ...Protective Elements 989 MCDLV4 DOK HB MCDLV4 2E Pr Q P Q P Qr...
Page 1023: ...Protective Elements 1023 MCDLV4 DOK HB MCDLV4 2E...
