GE T60 Instruction Manual page 482

GROUPED ELEMENTS
5
— Specifies the relay characteristic angle (RCA) for the sensitive directional power function. Application of
DIR POWER 1 RCA
this setting is threefold:
• It allows the element to respond to active or reactive power in any direction (active overpower/underpower, and so on)
• Together with a precise calibration angle, it allows compensation for any CT and VT angular errors to permit more
sensitive settings
• It allows for required direction in situations when the voltage signal is taken from behind a delta-wye connected
power transformer and the phase angle compensation is required
For example, the active overpower characteristic is achieved by setting
setting
DIR POWER 1 RCA
setting
DIR POWER 1 RCA
5-300
Figure 5-175: Directional power element sample applications
to "90°," active underpower by setting
to "270°."
to "0°," reactive overpower by
DIR POWER 1 RCA
to "180°," and reactive underpower by
DIR POWER 1 RCA
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS