Alstom MBCH13 - Page 5

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Figure 12 Three winding transformer showing interposing CTs 40
Figure 13 Block diagram: biased differential protection relay Type MBCH12
with two biased inputs 41
Figure 14 Block diagram: biased differential protection relay Type MBCH13
with three biased inputs 42
Figure 15 Block diagram: biased differential protection relay Type MBCH16
with six biased inputs 43
Figure 16 Connection for six change-over tripping contacts for three phase
tripping of up to six circuit breakers 44
6 COMMISSIONING TEST RECORD 45
REPAIR FORM 47