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5.6 GROUPED ELEMENTS
SETTING
MOTOR LINE SOURCE
VOLTAGE CONNECTION
Wye
Vag
Vbg
Vcg
SETTING
SPEED2 MOTOR SOURCE
VOLTAGE CONNECTION
Wye
Vag
Vbg
Vcg
SETTING
SPEED2 MOTOR SWITCH
SETTING
2-SPEED MOTOR
PROTECTION
i) TWO-SPEED MOTOR ACCELERATION TIME
5
PATH: SETTINGS
GROUPED ELEMENTS
SPEED2 ACCELERATION TIME
SPEED2
ACCELERATION TIME
If the speed 2 acceleration time functionality is enabled, the element will read current from the source selected for speed 2
by the
SETTINGS
speed 1 to speed 2.
Acceleration time settings and functionality at speed 2 are identical to those of speed 1 and are described in the
Acceleration time sub-section. This applies to the
and
NOTE
SPEED2 ACCEL MODE
Two additional setting define the transition between speeds. A two-speed motor is usually started at a low speed (speed 1)
and then switched to a higher speed (speed 2) when required. When the motor starts directly at high speed, then the
SPEED2 ACCELERATION TIME
low-to-high speed setting, the
switched from high speed to low speed, the
setting to allow inputs for control logic of contactors and breakers at both speeds. FlexLogic operands
SWITCH 2-1 DELAY
required for contactor and breaker control are provided. The acceleration time at speed 2 becomes functional only if the
acceleration time at speed 1 is enabled. When the acceleration time at any speed is not required, it can be permanently
blocked.
5-168
= Ia
= Ib
= Ic
Delta
Vab
Vbc
Vca
= Ia
= Ib
= Ic
Delta
Vab
Vbc
Vca
Off = 0
AND
Enabled = 1
Figure 5–74: TWO-SPEED MOTOR THERMAL MODEL LOGIC
SETTING GROUP 1(6)
SPEED2 ACCELERATION
CURRENT: 6.00 x FLC
SPEED2 ACCELERATION
MESSAGE
TIME: 10.00 s
SPEED2 ACCEL MODE:
MESSAGE
Definite Time
SPEED2 ACCEL TIME FR
MESSAGE
SPEED 1-2: 10.00 s
SPEED2 ACCEL BLOCK:
MESSAGE
Off
SYSTEM SETUP
MOTOR
settings.
setting specifies the maximum acceleration time at speed 2. When motor is switched from a
SPEED2 TIMER FROM SPEED 1-2
SPEED2 TRANS 2-1 OP
M60 Motor Protection System
Ia
Ib
Ic
Thermal model,
voltage dependent
Va
Vb
Vc
Thermal model
Thermal model
settings, speed 1
settings, speed 2
Off
On
ACTIVE
SETTING
SPEED2 SWITCH 2-1
DELAY
0
T
RST
MOTOR
TWO-SPEED MOTOR
Range: 1.00 to 10.00
Range: 0.05 to 180.00 s in steps of 0.01
Range: Definite Time, Adaptive
Range: 0.05 to 180.00 s in steps of 0.01
Range: FlexLogic operand
setting when the motor is switched from
2-SPEED MOTOR SOURCE
SPEED2 ACCELERATION CURRENT
setting specifies the acceleration time. When motor is
FlexLogic operand is set for time defined by the
5 SETTINGS
FLEXLOGIC OPERAND
MOTOR SPD2 TR 2-1 OP
833020A1.CDR
FLC in steps of 0.01
,
SPEED2 ACCELERATION TIME
SPEED2
GE Multilin
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