GE Power Management
469 Motor Management Relay
4-81
4 SETPOINT PROGRAMMING
4.13 S12 ANALOG I/O
4
4.13.3 ANALOG IN DIFF 1-2
This feature compares two analog inputs and activate alarms or trips based on their difference, which can be
an absolute difference in units or a percentage difference. The second analog input (2 for 1-2) is used as the
reference value for percentage calculations. The comparison logic can also be selected as one input greater
than the other (
"1>2"
) or vice versa (
"2>1"
) or as absolute difference (
"1<>2"
). The compared analog inputs
must be programmed with the same units type prior to programming this feature.
For example, two motors on a dual motor drive are each protected a 469. The motors should be at the same
power level (kW). Connect the analog outputs (programmed for kW) from both relays to the analog inputs of
one relay. Program the analog input differential to monitor the two motors kW and trip at a predetermined level.
y
ANALOG IN DIFF 1-2
y
[ENTER] for more
ANALOG IN DIFF 1-2:
Disabled
Range: Disabled, Enabled
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
NAME: Analog 1-2
Range: 12 alphanumeric characters
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
COMPARISON: % Diff
Range: % Diff, Abs. Diff
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
LOGIC: 1<>2
Range: 1<>2, 1>2, 2>1
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
ACTIVE: Always
Range: Always, Start/Run
Message seen only if Analog Inputs 1 and 2 are enabled.
A/I DIFF 1-2 BLOCK
FROM START: 0 s
Range: 0 to 5000 sec.; Step: 1
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
ALARM: Off
Range: Off, Latched, Unlatched
Message seen only if Analog Inputs 1 and 2 are enabled.
ASSIGN ALARM RELAYS:
Alarm
Range:
Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Alarm & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
ANALOG IN DIFF 1-2
ALARM LEVEL: 10%
Range: 0 to 500%; Step: 1
Seen only if Analog Inputs 1 / 2 are enabled & %Diff is set.
A/I DIFF 1-2 ALARM
LEVEL: 10 Units
Range: 0 to 50000; Step: 1
Seen only if Analog Inputs 1 / 2 enabled & Abs Diff is set.
ANALOG IN DIFF 1-2
ALARM DELAY: 0.1 s
Range: 0.1 to 300.0 sec.; Step: 0.1
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
EVENTS: Off
Range: On, Off
Message seen only if Analog Inputs 1 and 2 are enabled.
ANALOG IN DIFF 1-2
TRIP: Off
Range: Off, Latched, Unlatched
Message seen only if Analog Inputs 1 and 2 are enabled.
ASSIGN TRIP RELAYS:
Trip
Range:
Trip, Trip & Auxiliary2, Trip & Aux2 & Aux3
Trip & Auxiliary3
ANALOG IN DIFF 1-2
TRIP LEVEL: 10%s
Range: 0 to 500%; Step: 1
Seen only if Analog Inputs 1 / 2 are enabled & %Diff is set.
ANALOG IN DIFF 1-2
TRIP LEVEL: 10 Units
Range: 0 to 50000; Step: 1
Seen only if Analog Inputs 1 / 2 enabled & Abs Diff is set.
ANALOG IN DIFF 1-2
TRIP DELAY: 0.1 s
Range: 0.1 to 300.0 sec.; Step: 0.1
Message seen only if Analog Inputs 1 and 2 are enabled.
ENTER
ESCAPE
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Содержание MOTOR MANAGEMENT RELAY 469
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