GE 869 Instruction Manual page 207

CHAPTER 4: SETPOINTS
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPEED2 SWITCH 2-1 DELAY
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 5.00 s
This setting specifies the time delay to transfer from high to low speed. This allows the
motor to slow down before energizing at low speed. When the motor is switched from
high speed to low speed, the Speed2 Trans 2-1 Op FlexLogic operand is set for time
defined by the Speed2 Switch 2-1 Delay setting to allow inputs for control logic of
contactors and breakers at both speeds. FlexLogic operands required for contactor and
breaker control are provided.
SPEED2 MAX. ACCEL TIME
Range: 1.00 to 180.00 s in steps of 0.01 s
Default: 10.00 s
This setting is used by the Speed2 Acceleration Time element (see Protection > 2-speed
Motor) and Speed2 Motor Start (see Records).
When the setpoint 2-Speed Motor Protection is programmed as enabled, regardless of
the Acceleration Time element being Enabled or Disabled, this setting is also required to
calculate the motor start statistics (under Records > Motor Start Statistics) when the
motor does not go into the Running state from the Start state, i.e. unsuccessful motor
start. Otherwise, in the successful motor start case, motor Starting and Running states
are used to calculate the motor start statistics.
SPEED2 CT PRIMARY
Range: 1 to 12000 A in steps of 1 A
Default: 500 A
This setting specifies the primary rating of the three-phase CTs installed at the speed 2
stator winding terminals.
SPEED2 MOTOR FLA
Range: 1 to 5000 A in steps of 1 A
Default: 100 A
This setting specifies the motor full load current for speed 2.
SPEED2 RATED SPEED
Range: 100 to 7200 RPM in steps of 1 RPM
Default: 3600 RPM
This setting specifies the motor rated speed for speed 2. In addition, this setting is also
used by the Speed element as the rated value.
Figure 4-17: Two-Speed Motor Protection
SYSTEM
4–75