Littelfuse Startco FPU-32, Руководство пользователя

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Page 4-4
FPU-32 Feeder Protection Unit
Rev. 2-A-103014
Operation and Setup
TABLE 4.4 A
NALOG
-O
UTPUT
P
ARAMETERS
P
ARAMETER
D
ESCRIPTION
F
ULL
S
CALE
Phase Current Maximum of the three phase currents. Phase-CT-Primary Rating
EF (I
ct
Measured) Measured earth-leakage current from EF-CT. Earth-Fault-CT-Primary Rating
EF (3I
0
Calculated) Calculated earth-leakage current from phase CT’s. Phase-CT-Primary Rating
Used I
2
t Used Thermal Capacity 100% I
2
t
RTD Temp RTD Temperature
(1)
260

C (500

F)
Unbalance Current Unbalance (I
2
/I
1
) 1 Per Unit or 100%
Zero Zero Calibration Not Applicable
Full Scale Full-Scale Calibration Not Applicable
(1)
The output defaults to the calibrated zero output for an open or shorted RTD sensor.
4.2.8 M
ISCELLANEOUS
C
ONFIGURATION
Menu: Setup | System Config
System Name Appears on many of the display
screens and can be set by the user
(18-character alphanumeric field).
Password Used to change the 4-character
alphanumeric password.
Clock Setting Used to set the date and 24-hour
clock.
Password Timeout Used to set the password time-out
delay. Delay is measured from last
key press.
UPI LED Used to assign the internal
parameter to the UPI LED.
Maintenance Used to clear event records, trip
counters, and run hours.
Used to load defaults.
Used to view firmware version,
unit serial number, and
MAC address.
Used for firmware updates.
4.2.9 C
OMMUNICATIONS
Menu: Setup | Hardware | TIA-232 Comms
Menu: Setup | Hardware | Network Comms
The TIA-232 interface uses the Modbus

RTU protocol.
Set the TIA-232 ID and TIA-232 Baud to match the
requirements of the communications device. Default
settings are the same as SE-Comm-RIS PC-interface
software defaults.
If equipped with an optional network-communications
interface, refer to the appropriate communications-
interface manual.
N
OTE:
RS-232, EIA-232 and TIA-232 signal
specifications are compatible with the FPU-32.
4.3 M
ETERING
Menu: Metering
When Metering is selected in the main menu, press the
right-arrow key to access a list of metering displays. Use
the up- and down-arrow keys to scroll through the display
list. Pressing the right-arrow key displays the selected
metering information.
RESET is a “hot key” that is active in all meter
displays. Pressing RESET causes a jump to the
Trip and
Alarm display to allow trips to be viewed and reset.
Pressing ESC or the left-arrow key causes a return to the
Metering display.
Many displays include per unit (pu) values where 1.0
pu is equal to 100%. I
a
, I
b
, I
c
, I
1
, I
2
, and 3I
0
are in per unit
of phase-CT-primary rating. I
ct
is in per unit of earth-
fault-CT-primary rating.
The unbalance display indicates minus (-) if current
inputs are not sequenced A-B-C (negative-sequence
current is greater than positive-sequence current).
TABLE 4.5 M
ETERING
D
ISPLAY
M
ETERING
M
ENU
I
NFORMATION
D
ISPLAY
(1)
Current I
a
, I
b
, I
c
in A and per unit of I
p.
Unbalance I
1
, I
2
, in per unit of I
p
, I
2
/I
1
in per unit.
Earth Leakage I
ct
in A and per unit of I
e
, 3I
0
in A and
per unit of I
p.
Displays 3I
0
> Pickup when current
exceeds setting and 3I
0
protection is
selected.
Thermal Status Used I
2
t in Percent
Trend I
2
t in Percent
Displays “Reset I2t Trip” when reset is
allowed.
Displays reset time when tripped on I
2
t.
Displays time to trip in minutes if in
overload.
Inverse Status Phase and earth currents are less than or
greater than inverse-overcurrent pickup.
Local Sensor Sensor Type: RTD or PTC
Displays temperature in

C when type is
RTD.
Open or Short RTD failure.
Displays sensor status (Normal, Open,
Short) when type is PTC.
I/O Status Digital input On or Off and relay
outputs in binary.
System Status Date and Time
Settings Group
ETR Mode
Network Status Online or Timed Out Modbus State
DeviceNet Errors and Status
(1)
All metering displays show System Name.