TAVRIDA ELECTRIC Rec15, Техническое руководство

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The algorithm provides the set-up simplicity of a traditional sectionalizer and at the same time reducing the
fault clearing time and network reconfiguration time application in far more complex networks and provide an
unlimited number of sections to limit the number of customers affected.
Rezip is applicable in meshed grid automation schemes together with ABR functionality. Rezip enables the
building of self-healing networks where it is not possible with conventional reclosers and sectionalizers.
Zone Sequence Coordination
The AR OC provides Zone Sequence Coordination (ZSC). ZSC forces the AR OC element to step to the next
count in the reclose sequence on reset of all protection elements if it detects a downstream protection device
has operated. This functionality is required for applications where a fuse-saving philosophy is used.
Hot Line (HL)
This element consists of two sub-elements which provide protection against short circuit faults during Hot Line
maintenance. It generally has more sensitive settings than corresponding OCR settings and it has no reclosing
functions. HL consists of two Overcurrent elements, one for Phase Overcurrent (HLOC) and one for Earth
Fault (HLEF). Operation of either element results in the trip to lockout.
HL settings are described in Tables 43-46.
Table 38
– Radial line recloser HLOC element settings
Settings Designation Range Step size Default
Pickup current, A Ip 10-1280 1 10
Tripping time, s Tt 0.00
–2.00
0.01 0.00
Table 39
– Ring line recloser HLOC element settings
Settings Designation Range Step size Default
Pickup , A Ip+ 10-1280 1 10
Tripping time+, s Tt+ 0.00
–2.00
0.01 0.00
Pickup current-, A Ip- 10-1280 1 10
Tripping time-, s Tt- 0.00
–2.00
0.01 0.00
Table 40
– Radial line recloser HLEF element settings
Settings Designation Range Step size Default
Pickup current, A Ip 4-1280 1 4
Tripping time, s Tt 0.00
–2.00
0.01 0.00
Table 41
– Ring line recloser HLEF element settings
Settings Designation Range Step size Default
Pickup , A Ip+ 4-1280 1 4
Tripping time+, s Tt+ 0.00
–2.00
0.01 0.00
Pickup current-, A Ip- 4-1280 1 4
Tripping time-, s Tt- 0.00
–2.00
0.01 0.00
Sensitive Earth Fault (SEF)
This element provides protection against high impedance earth faults.
SEF settings are described in Table 42 and Table 43.
SEF TD and custom time current curves settings are described in Table 44 and Table 45.
Table 42
– Radial line recloser SEF element settings
Settings Designation Range Step size Default
Operating mode Mode Disable/Alarm/Trip Trip