50
Downstream line X1, Ohm/km
X1
0.0000
–2.0000
0.0001
0.3500
Downstream line X0, Ohm/km
X0
0.0000
–4.0000
0.0001
1.5000
Maximum fault distance, km
Lm
0.0
–1000.0
0.1
1.0
Table 82
– Ring line recloser FL element settings
Settings
Designation
Range
Step size
Default
Operating mode+
Mode+
Enable/Disable
n.a.
Disable
Downstream line X1+, Ohm/km
X1+
0.0000
–2.0000
0.0001
0.3500
Downstream line X0+, Ohm/km
X0+
0.0000
–4.0000
0.0001
1.5000
Maximum fault d, km
Lm+
0.0
–1000.0
0.1
1.0
Operating mode-
Mode-
Enable/Disable
n.a.
Disable
Downstream line X1-, Ohm/km
X1-
0.0000
–2.0000
0.0001
0.3500
Downstream line X0-, Ohm/km
X0-
0.0000
–4.0000
0.0001
1.5000
Maximum fault distance-, km
Lm-
0.0
–1000.0
0.1
1.0
Cold Load Pickup (CLP)
In some cases, when power supply is restored after prolonged outage, this results in greater than normal
power demand. The main cause of this problem is the large number of electric heaters, furnaces, refrigerators,
air conditioners and other thermostat-controlled loads. Higher current is often seen by protection as short circuit
or overload, that result in circuit breakers automatically tripping to protect the system from overload, and the
power goes off again. The CLP element enables temporary increasing current pickup setting to sustain cold
load current and avoid tripping without compromising protection sensitivity. This functionality is applicable for
radial recloser as only in this case can the duration of power interruption for a group of customers be observed.
CLP settings are described in Table 83.
Table 83
– CLP element settings
Parameter
Designation
Range
Resolution
Recognition time, min
Trec
0
–60
1
Reset time, min
Tres
1
–400
1
Cold load multiplier
CLM
1.0
–2.0
0.1
4.2 Measurement
Overview
The Main Processor gets the analog signals from the Outdoor Switching Module current and voltage sensors,
converts them into digital format, and filters it for Harmonic content. The RMS values of the filtered signals are
used for protection and indication as shown in the table below.
Table 84
– Applicability of RMS values of the signals
Settings
Designation
Range
Resolution
Applicability
Protection Indication
Phase currents, A
Ia, Ib, Ic
0 … 12500
1 A
Residual current
16
, A
In
0 … 12500
0.1 A
Positive sequence current, A
I1
0 … 12500
1 A
Negative sequence current, A
I2
0 … 12500
1 A
Neutral voltage shift measured from side, kV
Un+
0 … 30
0.1 kV
Neutral voltage shift measured from Source - side, kV
Ub-
0 … 30
0.1 kV
Positive sequence voltage measured from side, kV
U1+
0 … 30
0.1 kV
Positive sequence voltage measured from Source - side, kV
U1-
0 … 30
0.1 kV
Negative sequence voltage measured from side, kV
U2+
0 … 30
0.1 kV
Negative sequence voltage measured from Source - side, kV
U2-
0 … 30
0.1 kV
Frequency measured from side
17
, Hz
F+
40-60 at 50Hz
40-70 at 60Hz
0.01 Hz
16
Residual current In is equal to three times the zero sequence current Io.
17
Voltage and frequency memory is used if all three phase to earth voltages on any side drop below approximately 0.5 kV.
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: ......