Voltage Inputs - GE 469 Instruction Manual

469
Electrical Installation
Motor Management Relay
FIGURE 3–19: Summation Method without Phase CTs

Voltage Inputs

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 3–9) 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.
Polarity of the VTs is critical for correct power measurement and voltage phase
reversal operation.
A 1 A fuse is typically used to protect the inputs.
GE Multilin
3–15
http://www.GEindustrial.com/multilin