GE C70 Instruction Manual page 383

CHAPTER 5: SETTINGS
Use the negative-sequence overvoltage element to detect loss of one or two phases of the source, a reversed phase
sequence of voltage, or a non-symmetrical system voltage condition.
5.7.8.6 Auxiliary overvoltage (ANSI 59X, IEC PTOV)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  AUXILIARY OV1(3)
 AUXILIARY OV1

The C70 contains one auxiliary overvoltage element for each VT bank. This element is intended for monitoring overvoltage
conditions of the auxiliary voltage. The nominal secondary voltage of the auxiliary voltage channel entered under
SETUP  AC INPUTS  VOLTAGE BANK X5  AUXILIARY VT X5 SECONDARY
pickup level.
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
Figure 5-114: Negative-sequence overvoltage logic
AUX OV1

FUNCTION: Disabled
AUX OV1 SIGNAL

SOURCE: SRC 1
AUX OV1 PICKUP:

0.300 pu
AUX OV1 PICKUP

DELAY: 1.00 s
AUX OV1 RESET

DELAY: 1.00 s
AUX OV1 BLOCK:

Off
AUX OV1 TARGET:

Self-reset
AUX OV1 EVENTS:

Disabled
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.004 to 3.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
is the per-unit (pu) base used when setting the
GROUPED ELEMENTS
5
SYSTEM
5-217