V Oltage I Nputs - GE Multilin 469 Instruction Manual

CHAPTER 3: INSTALLATION
3.2.5 Voltage Inputs
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
FIGURE 3–18: Summation Method with Phase CTs
FIGURE 3–19: Summation Method without Phase CTs
The 469 has three channels for AC voltage inputs, each with an isolating transformer.
There are no internal fuses or ground connections on the voltage inputs. The maximum VT
ratio is 300.00:1. The two VT connections are open delta (see FIGURE 3–12: Typical Wiring
Diagram on page 3–11) or wye (see below). The voltage channels are connected in wye
internally, which means that the jumper shown on the delta-source connection of the
typical wiring diagram, between the phase B input and the 469 neutral terminal, must be
installed for open delta VTs.
3–17