Digital Elements - GE c60 Instruction Manual

CONTROL ELEMENTS
In this example, the phase voltage VT input is programmed as "Delta" with a secondary setting of 120 volts and a ratio of
13800 V / 120 V = 115. The auxiliary VT connection is selected to be VAB since this vector is in phase with VA on the
5
transformer primary. The secondary setting is 69 volts and the auxiliary VT ratio is calculated as 13800 V / 69 V = 200. Note
that the metered values for the auxiliary VT now reflect the AB voltage of the secondary side of the transformer.

5.8.6 Digital elements

SETTINGS  CONTROL ELEMENTS  DIGITAL ELEMENTS  DIGITAL ELEMENT 1(48)
 DIGITAL ELEMENT 1

5-228
Figure 5-118: Synchrocheck applied across a transformer
DIGITAL ELEMENT 1

FUNCTION: Disabled
DIG ELEM 1 NAME:

Dig Element 1
DIG ELEM 1 INPUT:

Off
DIG ELEM 1 PICKUP

DELAY: 0.000 s
DIG ELEM 1 RESET

DELAY: 0.000 s
DIG ELEMENT 1

PICKUP LED: Enabled
DIG ELEM 1 BLOCK:

Off
DIGITAL ELEMENT 1

TARGET: Self-reset
DIGITAL ELEMENT 1

EVENTS: Disabled
Range: Disabled, Enabled
Range: 16 alphanumeric characters
Range: FlexLogic operand
Range: 0.000 to 999999.999 s in steps of 0.001
Range: 0.000 to 999999.999 s in steps of 0.001
Range: Disabled, Enabled
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS