Motor - GE M60 UR Series Instruction Manual

5 SETTINGS
• MECH JAM OVERCURRENT PICKUP: This setting defines excessive current condition that identifies a mechanical
jam. As the element is not armed during start conditions, this threshold can be set below the starting current. Since the
element is armed during overload conditions, this setting should be higher than the maximum overload current. The
setting is entered in multiplies of FLA (defined in the
• MECH JAM PICKUP DELAY: This setting specifies the pickup delay of the element. In the case of large motors that
could feed close-in feeder faults, this setting can coordinate with feeder protection to avoid false tripping due to exces-
sive fault currents fed by the motor.
• MECH JAM RESET DELAY: This setting defines the reset delay of the element. Typical application includes time seal-
in of the tripping command.
f) UNDERCURRENT
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PATH: SETTINGS GROUPED ELEMENTS
 UNDERCURRENT
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The undercurrent function uses the source defined by the
Phase currents must be configured on this source; otherwise, the undercurrent function will not be operational. The ele-
ment responds to a per-phase current.
GE Multilin
SYSTEM SETUP
Figure 5–72: MECHANICAL JAM SCHEME LOGIC
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SETTING GROUP 1(6)
UNDERCURRENT
FUNCTION: Disabled
UNDERCURRENT START
BLOCK DLY: 0.50 s
UNDERCURRENT ALARM
PICKUP: 0.70 x FLA
UNDERCURRENT ALARM
PICKUP DLY: 2.00 s
UNDERCURRENT TRIP
PICKUP: 0.70 x FLA
UNDERCURRENT TRIP
PICKUP DLY: 1.00 s
UNDERCURRENT TRIP
RESET DLY: 1.00 s
UNDERCURRENT BLOCK:
Off
UNDERCURRENT TARGET:
Self-reset
UNDERCURRENT EVENTS:
Disabled
SYSTEM SETUP
M60 Motor Protection System
5.6 GROUPED ELEMENTS
 menu).

MOTOR


MOTOR UNDERCURRENT
Range: Enabled, Disabled
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.10 to 0.95 × FLA in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.10 to 0.95 × FLA in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Enabled, Disabled
 
MOTOR MOTOR LINE SOURCE
5
setting.
5-165