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Online Partial Discharge Measurement and
Control CIRED Round Table RT1B
Kristian Winter KTH/Swedish Neutral
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• The RCC Ground Fault Neutralizer balances out
  the residual ground fault current in
  resonance grounded networks.
• First commissioning in 1992, 70 systems
  installed to date.
• Quickest disarming of fault current commerically
  available today, with the added benefit that the
  faulty feeder is not disconnected during
  operation and full customer supply is maintained.

Dry-type Cable Arc Suppression Coil, Vattenfall
Sigtuna Substation 10kV, Sweden
Industrial Compact System Eko Stahl Steel Mill
30kV, Germany
RCC Ground Fault Neutralizer Deutsche Bahn
Raílway Network 110kV, Germany
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TEST SITE SIGTUNA 70/20/10 kV SUBSTATION, SWEDEN
Test Dates 26th 27th March 2007
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PD Level (mV)
Volts
Peak PD in Time
3,000
9,000
2,500
8,000
2,000
7,000
1,500
6,000
1,000
5,000
500
4,000
0
16
14
12
10
8
6
4
2
0
Time (Minutes)
HV Capacitor
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PD Level (mV)
Volts
Peak PD in Time
400
9,000
350
8,000
300
250
7,000
200
6,000
150
5,000
100
4,000
50
0
16
14
12
10
8
6
4
2
0
Time (Minutes)
HFCT
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PD Level (mV)
Volts
Peak PD in Time
350
7,000
300
6,000
250
5,000
200
4,000
150
3,000
2,000
50
1,000
0
16
14
12
10
8
6
4
2
0
Time (Minutes)
Off line lab test
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Questions?