GE G60 Instruction Manual page 235

5 SETTINGS
• FREQ RATE 1 MIN FREQUENCY: This setting defines minimum frequency level required for operation of the element.
The setting may be used to effectively block the feature based on frequency. For example, if the intent is to monitor an
increasing trend but only if the frequency is already above certain level, this setting should be set to the required fre-
quency level.
• FREQ RATE 1 MAX FREQUENCY: This setting defines maximum frequency level required for operation of the ele-
ment. The setting may be used to effectively block the feature based on frequency. For example, if the intent is to mon-
itor a decreasing trend but only if the frequency is already below certain level (such as for load shedding), this setting
should be set to the required frequency level.
SETTINGS
FREQ RATE 1 FUNCTION:
Enabled = 1
FREQ RATE 1 BLOCK:
Off
SETTING
FREQ RATE 1 SOURCE:
Pos seq voltage (V_1)
Pos seq current (I_1)
Frequency (F)
Figure 5–99: FREQUENCY RATE OF CHANGE SCHEME LOGIC
GE Multilin
SETTING
FREQ RATE 1 OV SUPV
PICKUP:
RUN
| V_1 | > PICKUP
SETTING
FREQ RATE 1 OC SUPV
FREQ RATE 1 TREND:
PICKUP:
FREQ RATE 1 PICKUP:
RUN
RUN
| I_1 | >PICKUP
df/dt > PICKUP
SETTINGS
FREQ RATE 1 MIN
FREQUENCY:
FREQ RATE 1 MAX
FREQUENCY:
RUN
F > MIN & F < MAX
RUN
Calculate df/dt
G60 Generator Management Relay
5.6 CONTROL ELEMENTS
SETTINGS
FREQ RATE 1 PICKUP
SETTINGS
DELAY:
FREQ RATE 1 RESET
DELAY:
t
PKP
t
RST
FLEXLOGIC OPERANDS
FREQ RATE 1 OP
FREQ RATE 1 DPO
FREQ RATE 1 PKP
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