GE Power Management
469 Motor Management Relay
4-17
4 SETPOINT PROGRAMMING
4.4 S3 DIGITAL INPUTS
4
4.4.6 STARTER STATUS
This input is
necessary
for all motors. The 469 determines that a motor has stopped when the phase current
falls below the level that the relay can measure (5% of CT primary). Monitoring an auxiliary contact from the
breaker or contactor prevents the relay from detecting additional starts when an unloaded motor is loaded, or
issuing a block start after an unloaded motor is started and running at less than 5% CT rated primary current.
Once
"Starter Auxiliary A"
is chosen, terminals D16 and D23 are monitored to detect the state of the breaker or
contactor, open signifying the breaker or contactor is open and shorted signifying the breaker or contactor is
closed. The 469 will then determine that a motor has made the transition from 'running' to 'stopped' only when
the measured current is less than 5% CT ratio and the 'a' contact is open.
Once
"Starter Auxiliary B"
is chosen, the terminals D16 and D23 will be monitored to detect the state of the
breaker or contactor, open signifying the breaker or contactor is closed and shorted signifying the breaker or
contactor is open. The 469 will then determine that a motor has made the transition from 'running' to 'stopped'
only when the measured current is less than 5% CT ratio and the 'b' contact is closed.
4.4.7 ASSIGNABLE DIGITAL INPUTS
There are four user assignable digital inputs configurable to a number of different functions, or turned Off.
Once a function is chosen, any messages that follow may be used to set pertinent parameters for operation.
Each function may only be chosen once. Assignable Inputs 1 to 4 are activated by shorting D19 to D22
(respectively) with D23.
Two-speed motor protection is enabled in
S2 SYSTEM SETUP\CURRENT SENSING
. If the Two-Speed Motor feature
is enabled,
ASSIGNABLE INPUT 4
is dedicated as the Two-Speed Motor Monitor and terminals D22 and D23 are
monitored for a contact closure. Closure of the contact signifies that the motor is in Speed 2 or High Speed. If
the input is open, it signifies that the motor is in Speed 1. This allows the 469 to determine which setpoints
should be active at any given point in time.
y
STARTER STATUS
y
[ENTER] for more
STARTER STATUS SW:
Starter Auxiliary A
Range: Starter Auxiliary A, Starter Auxiliary B
y
ASSIGNABLE INPUT 1
y
[ENTER] for more
INPUT 1 FUNCTION:
Off
Range:
Off, Remote Alarm, Remote Trip, Speed Switch Trip,
Load Shed Trip, Pressure Sw Alarm, Pressure Switch
Trip, Vibration Sw Alarm, Vibration Sw Trip, Digital
Counter, Tachometer, General Sw A, General Sw B,
General Sw C, General Sw D, Capture Trace, Simulate
Pre-Fault, Simulate Fault, Simulate Pre Fault... Fault
y
ASSIGNABLE INPUT 2
y
[ENTER] for more
INPUT 2 FUNCTION:
Off
As above for INPUT 1 FUNCTION
y
ASSIGNABLE INPUT 3
y
[ENTER] for more
INPUT 3 FUNCTION:
Off
As above for INPUT 1 FUNCTION
y
ASSIGNABLE INPUT 4
y
[ENTER] for more
INPUT 4 FUNCTION:
Off
As above for INPUT 1 FUNCTION
INPUT 4 FUNCTION IS
TWO-SPEED MOTOR
ENTER
ESCAPE
ð
ð
ENTER
ESCAPE
ð
ð
ENTER
ESCAPE
ð
ð
ENTER
ESCAPE
ð
ð
ENTER
ESCAPE
ð
ð
