Page 8-1
FPU-32 Feeder Protection Unit
Rev.
2-A-103014
Technical Specifications
8. T
ECHNICAL
S
PECIFICATIONS
8.1 FPU-32
Supply ...................................... 30 VA, 120-240 Vac
(+10, -45%), 50/60 Hz;
25 W, 110-250 Vdc
(+10, -25%)
Power-Up Time ........................ 800 ms at 120 Vac
Ride-Through Time .................. 100 ms minimum
24-Vdc Source
(1)
...................... 400 mA maximum
AC Measurements:
Methods .............................. True RMS, DFT, Peak,
and positive- and
negative-sequence
components of the
fundamental.
Sample
Rate
........................
32 samples/cycle.
Frequency: ................................ 50 or 60 Hz
Phase-Current Measurement:
(2)
Metering
Range
..................
15 x CT-Primary Rating
(I
p
)
Protection
Range
......................
80
x
I
p
Metering
Accuracy:
(3,4)
I < I
p
.............................. 2% I
p
I > I
p
.............................. 2% Reading
Unbalance Accuracy ........... 0.02 pu
Earth-Leakage Measurement:
Range
..................................
1.5
x
Earth-Fault-CT-
Primary Rating (I
e
)
Accuracy
(3, 4)
...................... 2% I
e
PTC-Thermistor Input:
(5)
Cold
Resistance
..................
1,500
maximum at
20
C (68
F)
Trip
Level
...........................
2,800
± 200
Reset
Level
.........................
1,500
200
Sensor Current .................... 1 mA maximum
RTD Input:
(5)
RTD
Type
...........................
3-wire
Pt100
Range
..................................
-40
to
260
C (-40 to
500
F) with open and
short detection
Sensor Current .................... 1 mA
Lead
Compensation
............
25
maximum
Accuracy
.............................
2
C (-40 to 200
C)
5
C (200 to 260
C)
4-20-mA Analog Output:
Type
....................................
Self
powered and loop
powered
Range .................................. 4 to 22 mA
Update Time ....................... 250 ms
Loop Voltage ...................... 8 to 26 Vdc
Load
....................................
500
(maximum with
24 Vdc supply)
Isolation
(1)
.......................... 120 Vac with L/S switch
in L position
Timing Accuracies:
(6)
I
2
t Overload ......................... 2%, 100 ms resolution
IEC/IEEE
Curves
................
5%, 10 ms resolution
Definite
Time
......................
2%, 10 ms resolution
Phase
Unbalance,
Loss, Reverse ...................... 2%, 100 ms resolution
Relay Contacts:
Configuration ...................... N.O. and N.C. (Form C)
CSA/UL Contact Rating ..... 8 A resistive 250 Vac,
8 A resistive 30 Vdc
Supplemental Contact Ratings:
Make/Carry 0.2 s .............. 20 A
Break:
dc ................................... 50 W resistive,
25 W inductive
(L/R = 0.04)
ac ................................... 2,000 VA resistive,
1,500 VA inductive
(PF = 0.4)
Subject to maximums of 8 A and 250 V (ac or
dc).
Digital Input:
Range .................................. 12 to 36 Vdc, 5 mA at
24 Vdc
Guaranteed On .................... 12 Vdc at 2 mA
Guaranteed Off ................... 3 Vdc at 0.5 mA
Isolation
..............................
120
Vac, terminals 25
and 26
I/O Module Interface:
Module
Supply
....................
24
Vdc,
400 mA
maximum
Configuration ...................... TIA-485, 2-wire multi-
drop
Isolation ..................................120 Vac
Bus Length .......................... 1.2 km (4,000’) maximum
Cable ................................... Belden 3124A or
equivalent
TIA-232 Communications:
Baud Rate ............................ 9.6, 19.2, 38.4 kbits
Protocol
...............................
Modbus
RTU
Address
............................... 1 to 255