GE P642 User Manual

E00642
Current pickup setting
K x Current pickup setting
Voltage threshold setting
Current
setting
Measured voltage
Figure 98: Modification of current pickup level for voltage controlled overcurrent protection
In the P643 and P6455, V
CO requires an optional three-phase VT to be fitted, and in the P642 it requires that two
single-phase VTs are fitted. In P643/5, the phase-to-phase voltages are derived from the measured phase-to-
neutral voltages. In the P642, two phase-to-phase voltages are measured and the third one is calculated. In the
P642 Vab and Vbc are measured, then Vca is calculated.
P64x Chapter 9 - Current Protection Functions
P64x-TM-EN-1.3 211

GE P642 Specifications

General

Brand	GE
Model	P642
Category	Relays
Language	English