Protection Relays & Controls
© 2014 Littelfuse Protection Relays & Controls
FPU-32 SERIES (PGR-7200)
Feeder Protection Unit
Description
The FPU-32 Feeder Protection Unit provides integrated
protection, metering, and data-logging functions. It is an excellent
choice for retrofitting and upgrading older relays because of its
compact size and ability to use existing CTs. The FPU-32 is
used to protect distribution feeders in processing, manufacturing,
petroleum, chemical, and wastewater treatment facilities.
MPU-CIM
(Current Input Module)
(Feeder Protection Unit)
FPU-32
PHASE CT
PHASE CT
CT
PHASE CT
GF
L2
L1
NOTE: The FPU-32 consists of the Feeder Protection Unit (pictured above) and
the MPU-CIM Current Input Module (not pictured).
ORDERING NUMBER COMMUNICATIONS
FPU-32-00-00 TIA-232
FPU-32-01-00 TIA-232 & RS-485
FPU-32-02-00 TIA-232 & DeviceNet™
FPU-32-04-00 TIA-232 & Ethernet
NOTE: One of the following is required: MPU-CIM-00-00 Current Input Module, or
MPU-CTI-RT-00 Current Input Module with ring-tonque terminals.
Ordering Information
Simplified Circuit Diagram
FEATURES BENEFITS
IEC & IEEE overcurrent
protection curves
Definite and inverse time settings for system
coordination; prevents catastrophic failures
Two setpoint groups
Create distinctive settings for maintenance or for
two different loads
Reduced overcurrent
mode
Maintenance mode setting to reduce the risk of
arc-flash hazards
Data logging
On-board 100-event recorder and remote data
logging helps with system diagnostics
Overload Thermal protection for connected load
Phase loss/Phase reverse
(current)
Detects unhealthy supply conditions
Unbalance (current) Prevents overheating due to unbalanced phases
Communications
Remotely view measured values, event records
& reset trips
Features & Benefits
A B
ACCESSORIES REQUIREMENT
Phase CTs Recommended
Ground-Fault CT Optional
MPU-16A-Y92A-96N Optional
Specifications
Protective Functions
(IEEE Device Numbers)
Input Voltage 65-265 Vac, 30 VA; 80-275 Vdc, 25 W
Power-Up Time 800 ms at 120 vac
Ride-Through Time 100 ms minimum
24-Vdc Source 400 mA maximum
AC Measurements True RMS and DFT, Peak 32 samples/cycle and
positive and negative sequence of fundamental
Frequency 50, 60 Hz
Output Contacts Three Form C
Approvals CSA certified, CE, C-Tick (Australian), UL Recognized
Communications TIA-232 (standard); TIA-485, DeviceNet™, Ethernet (optional)
Analog Output 4-20 mA, programmable
Conformally Coated Standard feature
Warranty 10 years
Mounting
(Control Unit) Panel (standard)
Surface (with MPU-32-SMK converter kit)
(Current Input Module) DIN, Surface
Overload (49, 51)
Phase sequence (46)
Unbalance (46)
Phase loss (46)
Phase Current Transformers
Phase CTs are required to detect phase
currents.
Ground-Fault Transformer
Zero-sequence current transformer detects
ground-fault current. Available with 5-A and 30-A
primary ratings for low-level pickup.
B
Accessories
A
Definite-time overcurrent (50, 51)
Inverse-time overcurrent (50, 51)
Ground fault (50G/N, 51G/N)
RTD/PTC temperature (49)
Feeder Protection–Standard
Littelfuse.com/fpu-32
Rev: 4-B-121214
Based on Manual Rev: 2-A-103014
