EATON Cutler Hammer FP-4000 Medium Voltage Feedline Protection Relay

Eaton Cutler Hammer FP-4000 is a microprocessor based medium voltage feeder protection relay that integrates protection, monitoring, control, metering, and multi-channel data recording functions. It covers multi-dimensional protection such as three-phase/ground overcurrent, undervoltage/overvoltage, and imbalance, supports INCOM/Modbus RTU dual communication protocols, and has 48-240Vac/dc wide voltage adaptation, ± 0.5% high metering accuracy, 16 fault logs, and 256 cycle waveform storage capabilities. It has passed multiple certifications such as UL and ANSI, and is perfectly adapted to the main/backup protection of medium voltage feeders, transformers, and other scenarios. It is a core equipment that simplifies industrial distribution systems and improves operation and maintenance efficiency.

Product basic positioning and core applications

Product attributes: FP-4000 is a medium voltage industrial grade microprocessor protection relay launched by Eaton Cutler Hammer. It adopts a fixed shell integrated design and can achieve full functional coverage of protection, monitoring, control, metering, and data recording without the need for separate relays/instruments. Its core value lies in simplifying industrial power distribution system design, saving panel space and wiring costs.

Core application scenarios

Main protection: the core protection equipment for medium voltage feeders, main circuits, and contact circuit breakers;

Backup protection: Backup protection units for transformers, high-voltage lines, and differential protection systems;

Adaptation architecture: It can collaborate with Cutler Hammer Digitrip 3000/MV relay system to adapt to medium voltage switchgear and main contact main distribution architecture.

Detailed explanation of core protection functions

FP-4000 covers the comprehensive protection requirements of industrial medium voltage scenarios, with key parameters shown in the following table:

table

Protection type, specific functions, core parameters, and characteristics

Three phase overcurrent protection with two-stage instantaneous overcurrent (50P-1/2)+inverse time overcurrent (51P-1) instantaneous setting range: 0.1-20.0 times the rated current;

Inverse time limit supports 10 standard curves (Mod/Very/Extreme, etc.), with a setting range of 0.1-4.0 times the rated current

Grounding overcurrent protection with two instantaneous (50X/50R-1/2) and inverse time limit (51X/51R) supports two types of grounding current monitoring: measured (Ix) and calculated (IR);

The setting range is consistent with three-phase overcurrent, accurately adapting to ground fault protection

Voltage protection main circuit under/over voltage (27M-1/2, 59M-1/2); Auxiliary circuit undervoltage/overvoltage (27A-1/2, 59A-1/2) setting range: 10-150Vac, delay support 0-9999 cycles, covering main/auxiliary circuit voltage abnormality protection

Frequency protection under frequency (81U-1/2) and over frequency (81O-1/2) setting range: 45-65Hz, 0.01Hz fine step, delay 0-9999 cycles, suitable for power grid frequency fluctuation protection

Unbalance protection current imbalance (46-1/2), voltage imbalance (47-1/2), current imbalance threshold: 4-40% I ₂/I ₁; Voltage imbalance threshold: 4-40% V ₂/V ₁, accurately identifying three-phase imbalance faults

Characteristic protection circuit breaker fault (50BF), regional interlocking (87B) circuit breaker fault setting: 0.1-5.0 times rated current;

Regional interlocking (87B) can replace expensive busbar differential protection and reduce deployment costs

Monitoring and metering functions

Full dimensional measurement capability

Basic electrical parameters: precise measurement of voltage (rms/phasor/sequence component), current (rms/phasor/sequence component), frequency (± 0.02Hz accuracy), power factor (lag/lead/net);

Power and energy consumption: statistics of active/reactive/apparent power (W/VAR/VA), demand/peak demand, and kWh/kVARh energy consumption data;

Power quality parameters: measure total harmonic distortion (% THD) and phase angle (* * ± 1 ° * * accuracy) to support power quality analysis.

Real time status monitoring

Circuit status: monitoring the continuity of the tripping circuit, the readiness status of the closing circuit, and the vacuum loss when the circuit breaker is opened;

Abnormal monitoring: detecting residual current exceeding the limit and cumulative breaking current of the circuit breaker (evaluating wear status);

Self diagnosis: Hardware/firmware automatic self check, triggering relay health alarm in case of malfunction, to avoid equipment failure in advance.

Data recording and fault analysis

Fault log: stores 16 fault events, including voltage/current sampling data and protection function triggering status during the fault;

Event sequence: Record 100 device operation events with precise timestamps, restore the time sequence before and after the fault;

Waveform capture: Supports 256 cycle waveform data storage, can associate 16 key events, and fully restore the electrical characteristics of faults;

Storage characteristics: All data is stored in non-volatile memory, which is not lost during power outages and is easy to trace and analyze after faults.

Control and programming functions

Basic control ability

Operation mode: Support front panel opening and closing buttons (local operation), communication interface remote control (remote operation);

Core logic: Built in main contact main switching scheme, bus transfer logic, suitable for dual power/multi power distribution scenarios.

Flexible programming configuration

Setting group: supports 4 independent protection/metering settings, which can be quickly switched according to the scene;

Logic editing: 6 programmable logic gates (AND/OR/NAND/NAND), 2 latch gates, 6 timers, to implement custom control logic;

Input/output interface: 8-channel 48Vdc wet contact discrete input, 5 sets of A-type output contacts, 2 sets of C-type output contacts, suitable for various industrial signal access/control requirements.

Communication and software support

Communication interface and protocol

Interface location, interface type, communication protocol, core parameters

Front panel RS-232 INCOM (default) baud rate: 38.4k/19.2k/9.6k, 9-pin mini interface, short distance local configuration

RS-485 Modbus RTU baud rate on the back of the device: 19.2k/9.6k, supports long-distance transmission at kilometer level, suitable for industrial bus networking

FSK on the back of the device – reserved interface, supporting auxiliary communication expansion, suitable for complex networking scenarios

Supporting software system

PowerPort: Free Windows software that supports PC connection to devices via RS-232, enabling parameter configuration, data retrieval, and waveform viewing;

PowerNet: a professional power management software that supports remote cluster monitoring, trend analysis, and billing statistics for multiple FP-4000 devices. Please contact an Eaton representative for assistance.

Key electrical and physical specifications

Core electrical specifications

Control voltage: Dual range optional -48-125Vac/dc, 100-240Vac/dc, suitable for different industrial power supply environments;

Current input: nominal 1A/5A (compatible with CT rating), supports 2 × In continuous overload, 1 second 50 × In instantaneous overload, and can withstand strong fault current surge;

Voltage input: nominal 120Vac, working range 69-150Vac, CT burden * *<0.015VA * *, low-power compatible with various voltage transformers;

Output contact: Instantaneous 30A ac/dc (0.25 seconds), continuous 5A 120/240VAC or 30Vdc, meeting the load requirements of industrial control contacts.

Accuracy and environmental specifications

Measurement accuracy: current/voltage * * ± 0.5%, power ± 1.5%, frequency ± 0.02Hz * *, meeting industrial grade measurement requirements;

Environmental adaptability: Operating temperature * * -40 ℃~+60 ℃ (test tolerance+85 ℃), storage temperature -40 ℃~+85 ℃, humidity 5% -95%, no condensation, altitude 0-2500m * *, suitable for harsh industrial outdoor/indoor environments;

Clock accuracy: Free running * * ± 1 minute/month * * (25 ℃), can be automatically calibrated by the PowerNet host to ensure the accuracy of event timestamps.

physical specifications

Dimensions: Height 10.15 inches (257.9mm), Width 7.62 inches (193.5mm), Front panel depth 0.62 inches (15.7mm), Rear panel depth 7.48 inches (190.0mm);

Weight: 9 lbs (approximately 4.08kg), suitable for installation in standard medium voltage switchgear.

Compliance certification and selection information

Core compliance certification: Passed international certifications such as UL 1053 (Ground Fault Protection Standard), ANSI C37.90 (Power System Protection Equipment Standard), EN 55011 (Electromagnetic Compatibility Standard), FCC 47 CFR Part 15 Class A, etc., suitable for global industrial distribution scenarios.

Selection Guide

Core selection criteria: Select 1A/5A models based on the on-site CT rating, choose the corresponding voltage range based on the control power supply, and select the INCOM/Modbus RTU protocol based on the communication system requirements;

Corresponding rules for catalog numbers: Generate according to the combination of “current range communication protocol control voltage”, for example: 5A+Modbus RTU+100-240Vac/dc corresponds to FP4201-11 (catalog number: 66D2120G46), and the specific corresponding relationship is shown in the table below:

Current Range Communication Protocol Control Voltage Model Number Catalog Number

5A INCOM 48-125Vac/dc FP4201-00 66D2120G41

1A INCOM 48-125Vac/dc FP4301-00 66D2120G42

5A INCOM 100-240Vac/dc FP4201-10 66D2120G44

1A INCOM 100-240Vac/dc FP4301-10 66D2120G45

5A Modbus RTU 100-240Vac/dc FP4201-11 66D2120G46

1A Modbus RTU 100-240Vac/dc FP4301-11 66D2120G47

5A Modbus RTU 48-125Vac/dc FP4201-01 66D2120G48

1A Modbus RTU 48-125Vac/dc FP4301-01 66D2120G49