Page 1-1
FPU-32 Feeder Protection Unit
Rev.
2-A-103014
Introduction
1. I
NTRODUCTION
1.1 G
ENERAL
The FPU-32 is a feeder protection relay that provides
integrated protection, metering, and data-logging
functions. The FPU-32 can be programmed using the
front-panel operator interface, the TIA-232 port, or an
optional communications network.
1.2 FPU-32 F
EATURES
1.2.1 P
ROTECTION
Overload (49, 51)
Definite-time overcurrent (50, 51)
Inverse-time overcurrent (50, 51, IEC and IEEE)
Definite-time earth fault (50G/N, 51G/N)
Inverse-time earth fault
(50G/N, 51G/N, IEC and IEEE)
Unbalance (46)
Phase loss (46)
Phase reverse (46)
PTC overtemperature (26, 49)
RTD temperature (26, 49)
Two set-point groups
1.2.2 M
ETERING
Line currents
Current unbalance
Positive-sequence current (I
1
)
Negative-sequence current (I
2
)
Zero-sequence current (3I
0
, calculated)
Earth-leakage current (CT input)
Used thermal capacity
Thermal trend
RTD temperature
1.2.3 D
ATA
L
OGGING
One-hundred records
Date and time of event
Event type
Cause of trip
Line currents
Current unbalance
Earth-leakage current
Used thermal capacity
RTD temperature
Trip counters
Running hours
1.2.4 I
NPUTS
AND
O
UTPUTS
Phase current inputs
Earth-leakage-current input
Programmable digital input (24 Vdc)
24-Vdc source for digital input
4-20-mA analog output, programmable
Temperature-sensor input, Pt100 RTD or PTC
I/O module interface
Three output relays, programmable
TIA-232 communications
Network communications
1.2.5 O
PERATOR
I
NTERFACE
4 x 20 backlit LCD display
Display-control and programming keys
LED status indication
1.2.6 C
OMMUNICATIONS
The
standard
communications interface is a TIA-232
port using the Modbus
RTU protocol. In addition to the
standard interface, network communications options
include TIA-485 with both Modbus
RTU and A-B
DF1
protocols, DeviceNet
TM
, and an IEEE 802.3 port with
Modbus
TCP Ethernet protocol.
