Siemens 7SG14 Duobias-M-200, Technical Manual

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7SG14 Duobias-M-200 Commissioning
Contents
1 INTRODUCTION
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2 SAFETY
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3 SEQUENCE OF TESTS 4
4 TEST EQUIPMENT REQUIRED 4
5 INSULATION RESISTANCE TEST
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6 REF PROTECTION - CT AND SECONDARY WIRING RESISTANCE
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7 RELAY POWER SUPPLY 6
8 PROGRAMMING THE RELAY 6
8.1 Setting by Laptop PC
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8.2 Setting via Relay Fascia Pushbutton
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9 SECONDARY INJECTION TESTS 7
9.1 Proving Inputs and Outputs
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9.2 Accuracy of Measurement
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9.3 Checking the Bias Characteristic (87BD)
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9.4 Inrush Inhibit
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9.5 Checking the Differential Highset (87HS)
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9.6 Restricted Earth Fault (87REF)
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9.7 Over Fluxing or Volts per Hertz Protection (24)
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9.8 Thermal Overload (49)
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9.9 Over Current and Earth Fault (51, 51N, 50, 50N, 50G, 51G)
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9.10 Negative Phase Sequence Over Current (46DTL,46ITL)
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10 PRIMARY INJECTION TESTS
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10.1 Biased Differential Protection
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10.2 Restricted Earth Fault
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11 TESTS USING LOAD CURRENTS 12
12 PUTTING INTO SERVICE
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13 SITE TEST SHEET 13
1 SITE TESTS 15
1.1 Insulation Resistance
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1.2 Hardware Tests
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1.2.1 Status Inputs
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1.2.2 Output Relays
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1.3 Secondary Injection
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1.3.1 Accuracy of Measurement
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1.3.2 Biased Differential Characteristics
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1.3.3 Inrush Inhibit Pickup
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1.3.4 Differential Highset Pickup
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1.3.5 Restricted Earth Fault
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1.3.6 Overfluxing
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1.3.7 Thermal Overload
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1.3.8 Backup Over current and Earth Fault
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1.3.9 Negative Phase Sequence Over current
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1.4 Primary Injection / On Load Tests
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1.4.1 Differential Protection
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©2010 Siemens Protection Devices Limited Chapter 7 Page 2 of 20