Siemens Reyrolle 7SR5 - Page 321

W2 ICT Multiplier = 1250/1500 = 0.83
[fo_function87TExample6, 1, en_US]
W3 ICT Multiplier = 2000/4499 = 0.44
[dw_7SR5_function87Tsettingsexample5, 1, en_US]
Figure 5-58
ICT Settings – Example 1
CT/VT Config >
W1 Phase Input 1 A
W1 Phase CT Ratio 400:1
W2 Phase Input 1 A
W2 Phase CT Ratio 1250:1
W3 Phase Input 5 A
W3 Phase CT Ratio 2000:1
Function Config >
Gn 87T-BD Enabled
87T > 87T Common >
Gn W1 ICT Multiplier 1.02 (1 A input)
Gn W1 ICT Connection Yd11
Gn W2 ICT Multiplier 0.83 (1 A input)
Gn W2 ICT Connection Ydy0
Gn W3 ICT Multiplier 0.45 (1 A input)
Gn W3 ICT Connection Yd11
Protection and Automation Functions
5.22 87T Transformer Differential Protection
Reyrolle 7SR5, Transformer Protection Device, Device Manual 321
C53000-G7040-C015-1, Edition 11.2019