Littelfuse MPS - 9 Technical Specifications; Control Unit (MPS-CTU)

Page 9-1
MPS Motor Protection System Rev. 6-F-022117
Technical Specifications
9. TECHNICAL SPECIFICATIONS
9.1 CONTROL UNIT (MPS-CTU)
Supply ....................................... 25 VA, 120 to 240 Vac
(+10, -45%),
40 to 400 Hz, power
factor corrected;
25 W, 110 to 250 Vdc
(+10, -25%)
Power-Up Time ......................... 800 ms at 120 Vac
Ride-Through Time .................. 100 ms minimum
24-Vdc Source
(1)
....................... 100 mA maximum
AC Measurements:
Methods ............................... True RMS and DFT,
Positive- and negative-
sequence components of
the fundamental
Sample Rate ........................ 16 samples/cycle
Frequency:
Fixed .................................... 50, 60 Hz
Variable ............................... 10 to 70 Hz, sync via
4-20 mA signal from
ASD
Phase-Current Inputs:
(2)
Range ................................... 18 x CT-Primary Rating
(I
p
)
Accuracy:
(3)
I < I
p
.................................. 1% I
p
I > I
p
.................................. 1% Reading
Burden ................................. < 0.01 W
Unbalance Accuracy ........... 0.01 pu
Common-Mode Voltage ...... 120 Vac maximum
Thermal Withstand:
Continuous ........................ 5 x I
P
1-Second ........................... 80 x I
P
Earth-Leakage Input:
Range ................................... 1.5 x Earth-Fault-CT-
Primary Rating (I
e
)
Accuracy
(3)
.......................... 1% I
e
Burden ................................. < 0.01 W (1- and 5-A
inputs), 10 W for EFCT
Common-Mode Voltage ...... 120 Vac maximum
Thermal Withstand:
Continuous ........................ 5 x I
e
1-Second ........................... 80 x I
e
Phase-Voltage Inputs:
(4, 5)
Nominal Input ..................... 30 to 600 Vac line-to-line
Input Resistance .................. 3.4 MW
Range ................................... 1.4 x PT-Primary Rating
(V
p
)
Voltage-Input Fuse .............. 0.3 A, Class CC
Littelfuse KLKR.300
Voltage-Input Wire
(9)
........... 18 AWG to 14 AWG
(0.82 to 2.08 mm
2
), 600 V
Accuracy:
(3)
V < V
p
............................... 1% V
p
V > V
p
............................... 1% Reading
Unbalance Accuracy ........... 0.01 pu
Frequency Metering:
Range ................................... 5 to 100 Hz,
Uses VA input,
Sine wave assumed
Accuracy ............................. 0.05 Hz
PTC-Thermistor Input:
(1)
Cold Resistance ................... 1500 W maximum at 20°C
(68°F)
Trip Level ............................ 2,800 W ± 100 W
Sensor Current ..................... 2 mA maximum
4-20 mA Analog Input:
Input Burden ........................ 100 W
Common-Mode
Voltage
(6)
............................ ± 5 Vdc
4-20 mA Analog Output:
(1)
Load ..................................... 500 W maximum
Range ................................... 0 to 25 mA
Update Time ....................... 500 ms
Tachometer Input:
(7)
Type ..................................... Active pickup, 24-V logic
output, sourcing, PNP
output
TURCK Bi1.5-EG08-
AP6X-V1131 or
equivalent
Pulses Per Revolution ......... 1 to 120
Pulse Frequency .................. 10 Hz to 10 kHz
Accuracy ............................. 1%
Timing Accuracies:
(8)
Set Points ............................. -10%, + 0%
(minimum 25 to 45 ms)
Overload .............................. Greater of 2% or
+ 200 ms (minimum 25 to
45 ms)