GE 845 Instruction Manual page 402

CONTROL
4–298
Figure 4-125: Two winding transformer without voltage
2. 845 relay for a two winding transformer with voltage (2-P1/P5 order code option)
Figure 4-126: Two winding transformer with voltage
3. 845 relay for a three winding transformer (3-R1/R5 order code option).
– Standard three-winding transformer with one breaker per winding
Figure 4-127: Three winding transformer with one breaker per winding
– Three-winding transformer with HV winding connected to two breakers (a), and LV
winding connected to two-breakers (b)
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS