30
Rezip sectionalizer
The Rezip sectionalizer provides detection and subsequent trip during dead time of upstream recloser as the
Standard sectionalizer.
In addition Rezip sectionalizer automatically finds and segregates the faulty segment of radial, ring or meshed
feeder by opening all devices which have sensed fault current and then close them one by one till the faulty
segment is found. When faulty segment is found, only the nearest device to the fault will open to lockout.
Rezip sectionalizer can be used with other automation features to provide sophisticated network healing
algorithms.
The Rezip sectionalizer allows to:
•
Overcome the limit of the number of sectionalizers in series;
•
Minimize protection settings design resources (same protection settings for all Rezip sectionalizers for the
most applications can be programmed);
•
Minimize the number of upstream recloser operations and power interruptions for healthy network sections.
Protection Elements
OCR mode
OCR mode defines whether device operates as Recloser with OCR element or as a Sectionalizer with SECR
element.
OCR mode can be independently selected for each protection group.
OCR mode settings are described in Table 15.
Table 15
– OCR mode
settings
Settings
Range
Default
OCR mode
Recloser/Sectionalizer
Recloser
Source Detector (SD)
The source detector element has two main functions:
•
Provides power flow direction to directional protection elements (ring operation mode);
•
Provides source side information for loss of supply protection element.
Protection elements: AR OC, HL, AR SEF, VU, CU, AR UV, AR UF, AR OV, AR OF, CCV and ABR operation
depends on the source side being identified. If power
flows from „Source +“ side, then „Set +“ protection
settings are active, if power flows from „Source -“ side, then „Set -“ protection settings are active.
Source detector has a changeable voltage detection level. In case power source voltage is less than specified,
it will not consider as a source.
Table 16
– Source Detector element settings
Settings
Designation
Range
Resolution
Default
Operating mode
Mode
Enable/Disable
n.a.
Disable
Source threshold voltage, kV
Ust
8
0.5
–27.0
0.1
0.5
Bolted Fault (BF)
This element provides instantaneous tripping when bolted fault conditions are detected. As it deals both with
positive sequence voltage and current it provides better sensitivity for bolted faults than conventional highset
overcurrent elements.
Phase Overcurrent (OC)
This element is available for OCR mode “Recloser” only.
This element provides protection against overloads, phase-to-phase and three-phase short circuits.
8
The value of Ust setting cannot exceed the value of Rated voltage configuration setting.
Summary of Contents for Rec15
Page 1: ......
Page 5: ...1 Introduction...
Page 9: ...2 Technical Parameters...
Page 14: ...3 Product Description...
Page 26: ...26 Figure 25 Anti vandal housing...
Page 27: ...4 Functionality...
Page 56: ...5 Product Handling...
Page 69: ...6 Installation...
Page 81: ...7 Commissioning...
Page 84: ...8 Operation...
Page 99: ...99 Figure 76 Settings uploading wizard...
Page 100: ...9 Maintenance and Troubleshooting...
Page 114: ...114 Figure 90 Securing the trip hook shaft against rotation...
Page 115: ...10 Product Coding...
Page 122: ...11 Appendices...
Page 128: ...128 Appendix 4 Recloser Control Drawings Figure 99 Dimensions of RC5_4...
Page 133: ...133 Figure 106 Dimensions of standard OSM mounting kit arrangement for lateral installation...
Page 134: ...134 Figure 107 Dimensions of interface bracket...
Page 135: ...135 Figure 108 Dimensions of OSM mounting kit with M16 pole interface front installation...
Page 136: ...136 Figure 109 Dimensions of OSM mounting kit with M16 pole interface lateral installation...
Page 137: ...137 Figure 110 Dimensions of OSM mounting kit with M20 pole interface front installation...
Page 138: ...138 Figure 111 Dimensions of OSM mounting kit with M20 pole interface lateral installation...
Page 149: ...149 Figure 122 Dimensions of OSM substation mounting kit...
Page 152: ...152 Figure 125 Dimensions of RC mounting kit for through the pole installation...
Page 153: ...153 Figure 126 Dimensions of RC substation mounting kit...
Page 154: ...154 Figure 127 Dimensions of VT mounting kit One VT holder...
Page 163: ...163 Appendix 8 Connectors Drawings Figure 141 Dimensions of aerial connector...
Page 164: ...164 Figure 142 Dimensions of bird guards for aerial connector...
Page 165: ...165 Figure 143 Dimensions of two hole NEMA connector...
Page 166: ...166 Figure 144 Dimensions of bird guards for two hole NEMA connector...
Page 167: ...167 Figure 145 Dimensions of four hole NEMA connector...
Page 168: ...168 Figure 146 Dimensions of bird guards for four hole NEMA connector...
Page 169: ...169 Figure 147 Dimensions of Burndy NEMA connector...
Page 170: ...170 Appendix 9 Recloser Control Wiring Diagram Figure 148 RC5_4 wiring diagram...
Page 172: ......