Siemens 7SG12 DAD-N Manual page 68

Reyrolle protection devices
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Figure 15 – High Impedance Protection of Auto-transformer
©2010 Siemens Protection Devices Limited
NLR
7SG12 DAD N Applications Guide
All CTs should be the same Ratio
and ideally have the same
kneepoint voltage
Stabilising
Resistors
Relay
Elements
Chapter 5 Page 14 of 16

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