Application Description

Eaton’s Cutler-Hammer FP-4000 Feeder Protection Relay provides

complete 3-phase and ground overcurrent and voltage protection

plus metering. It may be used as primary protection on feeders, mains

and tie circuit breaker applications, and as backup protection for trans

formers, high voltage lines and differential protection. The relay is most

commonly used on medium voltage switchgear applications.

The FP-4000 takes full advantage of its microprocessor technology,

providing the user new freedoms and a wealth of data-gathering

features. The relay performs self-checking of all major hardware and

firmware protection elements to ensure their operation in the event of

a system or component electrical failure or fault. Protection functions

are well suited for main and distribution feeder circuit applications.

Programmable logic control functions make the FP-4000 relay ideally

suited for main-tie-main and main 1/main 2 transfer schemes.

The zone interlocking feature can be utilized for bus protection instead

of an expensive and complicated bus differential (87B) scheme.

The FP-4000 works directly with the Cutler-Hammer Digitrip 3000

and Digitrip MV relays. New breaker failure logic provides faster

remote backup clearing times for stuck breaker operation.

The FP-4000 provides trip and close circuit monitoring and alarming

features. It continually monitors the complete trip and close circuits

for continuity and readiness to trip. Open and close pushbuttons are

conveniently located on the front of the relay for local breaker operation.

Loss-of-vacuum monitoring is activated when the breaker is open.

Residual current is monitored and alarmed if detected.

When an electrical fault or disturbance occurs, the FP-4000 begins

to store the following in non-volatile memory:

• Voltage and current sampled data.

• Calculated values.

• Status of internal protection functions, logic, contact inputs and

outputs.

Retrieval and viewing of the data is easy, aiding in the quick analysis

and restoration of your electric power system.