GE Multilin C60 Breaker Protection System 5-201
5 SETTINGS 5.6 GROUPED ELEMENTS
5
• OPEN POLE BROKEN CONDUCTOR: This setting enables or disables detection of broken conductor or remote pole
open conditions.
• OPEN POLE VOLTAGE INPUT: This setting is used to enable/disable the voltage input in making a logical decision. If
the line VT (not bus VT) is available, the voltage input can be set to “Enable”.
• OPEN POLE VOLTAGE SOURCE: This setting is used to select the voltage source for the element.
• OPEN POLE
φA(C) AUX CONTACT: These three settings used to select a FlexLogic operand reflecting the state of
the 52b type phase A circuit breaker auxiliary contact (closed when main breaker contact is open) for single-pole trip-
ping applications. If two breakers per line are used, then both breaker auxiliary contacts feeding into the AND gate
(representing auxiliary contacts connected in series) are to be assigned.
• OPEN POLE PICKUP DELAY: This setting is used to select the pickup delay of the element.
• OPEN POLE RESET DELAY: This setting is used to select the reset delay of the element. The use of this setting
depends on the particular application and whether single-pole or three-pole tripping is used. It should comprise the
reset time of the operating elements it used in conjunction with the breaker opening time and breaker auxiliary contacts
discrepancy with the main contacts.
Figure 5–85: OPEN POLE DETECTOR SCHEME LOGIC
SETTING
SETTING
SETTING
SETTING
SETTING
SETTING
FLEXLOGIC OPERAND
OPEN POLE
FUNCTION:
OPEN POLE A
AUX CONTACT:
OPEN POLE B
AUX CONTACT:
OPEN POLE C
AUX CONTACT:
OPEN POLE BLOCK:
OPEN POLE
CURRENT SOURCE:
OPEN POLE
CURRENT PICKUP:
OPEN POLE
PICKUP DELAY:
OPEN POLE
RESET DELAY:
ANY PHASE
A
B
C
OPEN POLE
VOLTAGE INPUT:
OPEN POLE
VOLTAGE SOURCE:
OPEN POLE OP
OPEN POLE OP C
OPEN POLE OP B
OPEN POLE OP A
WYE DELTA
VA < 75% Nominal
VB < 75% Nominal
VC < 75% Nominal
RUN
RUN
VAG or VAB
VBG or VBC
VCG or VCA
Off=0
Off=0
IA IA > SETTING
IB IB > SETTING
IC IC > SETTING
Enable=1
Enable=1
OR
OR
AND
AND
AND
AND
AND
AND
AND
AND
AND
AND
AND
827047A7.CDR
SETTING
SETTING
SETTING
SETTING
Off=0
Off=0
OR
OR
OR
OPEN POLE BROKEN
CONDUCTOR:
Enable=1
SETTING
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