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SPECIFICATIONS
1–10
Standard Overload Curve, Cutoff
Effect:.................................................................
Standard Overload Curve, Shift
Effect:.................................................................
Motor Rated Voltage:........................................ 1 to 50000 V in steps of 1
Thermal Model Biasing: ................................... Current Unbalance, RTDs
Thermal Model Update Rate: ........................ 1 power cycle
Stopped/Running Cool Time Constants: . 1 to 1000 min. in steps of 1
Stopped/Running Cool Time Constant
Decay:................................................................. Exponential
Hot/Cold Safe Stall Ratio:................................ 0.01 to 1.00 in steps of 0.01
Current Accuracy:............................................... Per phase current inputs
Current Source:.................................................... True RMS
Timer Accuracy: .................................................. ±100 ms or ±2%, whichever is greater
Timer Accuracy for Voltage Dependent
Overload:........................................................... ±100 ms or ±4%, whichever is greater
CURRENT UNBALANCE (46)
Unbalance: ............................................................ Unbal = (I
Trip/Alarm Pickup Level:.................................. 4.0 to 50.0% in steps of 0.1%
Trip Operating Curves: ..................................... Definite Time: T=TDM sec
Trip Pickup Delay: ............................................... 0.00 to 180.00 s in steps of 0.01 s when Trip Curve = Definite
Trip Time Dial Multiplier (TDM):..................... 0.00 to 180.00 in steps of 0.01 when Trip Curve = Inverse
Trip Maximum Time: ......................................... 0.00 to 1000.00 s in steps of 0.01 s
Trip Minimum Time:........................................... 0.00 to 1000.00 s in steps of 0.01 s
Trip Reset Time:................................................... 0.00 to 1000.00 s in steps of 0.01 s
Alarm Time Delay:.............................................. 0.00 to 180.00 s in steps of 0.01 s
Single Phasing Pickup Level: ......................... unbalance level > 40% or when I
Single Phasing Time Delay:............................ 2 seconds
Pickup Accuracy:................................................. ±2%
Operate Time: ...................................................... <2 cycles at 1.10 x pickup (NOTE 1)
Timing Accuracy:................................................ ±3% of delay setting time or ± 20 ms, whichever is greater
Element: .................................................................. Trip and Alarm
Single Phasing Element: .................................. Trip
MECHANICAL JAM
Operating Condition:......................................... Phase Overcurrent
Arming Condition:............................................... Motor not starting
Pickup Level: ......................................................... 1.00 to 10.00 x FLA in steps of 0.01
Dropout Level: ...................................................... 97 to 98% of Pickup
Level Accuracy:.................................................... For 0.1 to 2.0 x CT: ±0.5% of reading; at > 2.0 x CT rating:
Pickup Delay: ........................................................ 0.10 to 180.00 s in steps of 0.01
Dropout Delay:..................................................... 0.00 to 180.00 s in steps of 0.01
Timer Accuracy: .................................................. ±3% of delay setting time or ±20 ms, whichever is greater
/ I
) x A
x 100%
2
1
factor
A
= (I
/ FLA) if l
< FLA
factor
avg
avg
A
= 1 if l
>= FLA
factor
avg
Inverse Time: T= (TDM/[Unbal]
Time
Curve
in any phase is less than the cutoff current
±1.5% of reading
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION
2
) sec
>=25%FLA and current
avg
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