BENSHAW RediStart MX3 Series, User Manual

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2.2.2 Measurements and Accuracies
2.2.3 List of Motor Protection Features
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ANSI 14 – Speed Switch and Tachometer Trip
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ANSI 19 – Reduced Voltage Start
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ANSI 27 / 59 – Adjustable over/under voltage protection (Off or 1 to 40%, time 0.1 to 90.0 sec. in 0.1 sec.
intervals, independent over and under voltage levels)
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ANSI 37 – Undercurrent detection (Off or 5 to 100% and time 0.1 to 90.0 sec. in 0.1 sec. intervals)
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ANSI 38 – Bearing RTD
Other RTD
Open RTD Alarm
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ANSI 46 – Current imbalance detection (Off or 5 to 40%)
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ANSI 47 – Phase rotation (selectable ABC, CBA, Insensitive, or Single Phase)
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ANSI 48 – Adjustable up-to-speed / stall timer (1 to 900 sec. in 1 sec. intervals)
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ANSI 49 – Stator RTD
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ANSI 50 – Instantaneous electronic overcurrent trip
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ANSI 51 – Electronic motor overload (Off, class 1 to 40, separate starting and running curves available)
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ANSI 51 – Overcurrent detection (Off or 50 to 800% and time 0.1 to 90.0 sec. in 0.1 sec. intervals)
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ANSI 51G – Residual Ground fault detection (Off or 5 to 100% of motor FLA)
Zero Sequence Ground Fault Detection (Off, 0.1 - 25Amps)
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ANSI 66 – Starts/Hour & Time Between Starts
Restart Block (Backspin Timer)
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ANSI 74 – Alarm relay output available
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ANSI 81 – Over / Under Frequency
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ANSI 86 – Overload lockout
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Single Phase Protection
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Shorted SCR detection
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Mechanical Jam
10
2 - TECHNICAL SPECIFICATIONS
Internal Measurements
CT Inputs
Conversion: True RMS, Sampling @ 1.562kHz
Range: 1-6400A
Line Voltage Inputs
Conversion: True RMS, Sampling @ 1.562kHz
Range: 100VAC to 1000VAC, 23 to 72 Hz
Metering
Current
Voltage
Watts
Volts-Amps
Watt-Hours
PF
Line Frequency
Ground Fault
Zero Seq GF
Run Time
Analog Input
Analog Output
0 – 40,000 Amps ± 3%
0 – 1250 Volts ± 3%
0 – 9,999 MW ± 5%
0 – 9,999 MVA ± 5%
0 – 10,000 MWh ± 5%
-0.01 to +0.01 (Lag & Lead) ± 5%
23 – 72 Hz ± 0.1 Hz
5 – 100% FLA ± 5% (Machine Protection)
0.1 – 25.0 Amps ± 3%
± 3 seconds per 24 hour period
Accuracy ± 3% of full scale (10 bit)
Accuracy ±2% of full scale (12 bit)
z
NOTE:
Percent accuracy is percent of full scale of the given ranges, Current = Motor
FLA, Voltage = 1000V, Watts/Volts-Amps/Watt-Hours = Motor & Voltage range
Table 2: Measurements and Accuracies