Siemens 7SG14 Duobias-M-200 Manuals

Manuals and User Guides for Siemens 7SG14 Duobias-M-200. We have 1 Siemens 7SG14 Duobias-M-200 manual available for free PDF download: Technical Manual

Siemens 7SG14 Duobias-M-200 Technical Manual

Siemens 7SG14 Duobias-M-200 Technical Manual (20 pages)

Transformer Protection

Brand: Siemens | Category: Power distribution unit | Size: 0.59 MB

Table of Contents

Table of Contents
2
Introduction
4
Safety
4
Sequence of Tests
4
Test Equipment Required
4
Insulation Resistance Test
5
Ref Protection - Ct and Secondary Wiring Resistance
6
Relay Power Supply
6
Programming the Relay
6
Setting by Laptop PC
6
Setting Via Relay Fascia Pushbutton
7
Secondary Injection Tests
7
Proving Inputs and Outputs
7
Accuracy of Measurement
7
Checking the Bias Characteristic (87BD)
8
Inrush Inhibit
8
Checking the Differential Highset (87HS)
9
Restricted Earth Fault (87REF)
10
Over Fluxing or Volts Per Hertz Protection
10
Thermal Overload
10
Over Current and Earth Fault (51, 51N, 50, 50N, 50G, 51G)
11
Negative Phase Sequence over Current (46DTL,46ITL)
11
Primary Injection Tests
11
Biased Differential Protection
12
Restricted Earth Fault
12
Tests Using Load Currents
12
Putting into Service
13
Site Test Sheet
13
Site Tests
15
Insulation Resistance
15
Hardware Tests
15
Status Inputs
15
Output Relays
16
Secondary Injection
16
Accuracy of Measurement
16
Biased Differential Characteristics
17
Inrush Inhibit Pickup
17
Differential Highset Pickup
17
Restricted Earth Fault
17
Overfluxing
18
Thermal Overload
18
Backup over Current and Earth Fault
18
Negative Phase Sequence over Current
18
Primary Injection / on Load Tests
19
Differential Protection
19

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