Protection Relays & Controls

© 2013 Littelfuse Protection Relays & Controls

Littelfuse.com/fps

Feeder Protection–Advanced

PHASE

VOLTAGES

FPS-CTU

CONTROL UNIT

RELAY

OUTPUTS

I/0 MODULE

DIGITAL

INPUTS

4-20 mA

ANALOG

INPUT

+

ANALOG

OUTPUT

4-20 mA

+

39

40

53

52

43

51

......

5

16

......

1

2

60

56

20

17

......

33

22

CONTROL

POWER

RS-485

35

37

......

30 29

27

26

23

22

PHASE CURRENT

TRANFORMERS

GROUND-FAULT

CURRENT

TRANSFORMER

OPERATOR INTERFACE

FPS-OPI

(recommended)

(required)

(recommended)

RTD MODULE

MPS-RTD

(optional)

Wiring Diagram

A

B

C

1

2

Specifications

Protective Functions

(IEEE Device Numbers)

Input Voltage

65-265 Vac, 25 VA; 80-275 Vdc, 25 W

Power-Up Time

800 ms at 120 Vac

Ride-Through Time

100 ms minimum

24-Vdc Source

100 mA maximum

AC Measurements

True RMS and DFT, Peak, 16 samples/cycle, and

positive and negative sequence of fundamental

Frequency

50 or 60 Hz

Inputs

Phase current, Earth-leakage current, Phase voltage,

7 digital, 1 analog

Output Contacts

5 contacts — See Product Manual

Approvals

CSA certified, C-Tick (Australian)

Communications

Conformal Coating

Standard feature

Warranty

10 years

Mounting:

Control Unit

Surface

Operator Interface

Panel, Control-Unit mounted

Overload (49, 51)

Phase reverse (current) (46)

Overfrequency (81)

Overcurrent (50, 51)

Underfrequency (81)

Ground fault (50G/N, 51G/N)

Unbalance (voltage) (47)

RTD temperature (38, 49)

Unbalance (current) (46)

Phase loss (voltage) (47)

Overvoltage (59)

Phase loss (current) (46)

Undervoltage (27)

Phase reverse (voltage) (47)

Power factor (55)

Features & Benefits

FEAtuRES

IEEE #

bEnEFItS

Overload

49, 51

Long-time overcurrent provides thermal protection for feeder or load

Inverse-time overcurrent

50, 51

Coordination using IEEE and IEC Curves

Definite-time overcurrent

50, 51

Instantaneous overcurrent to detect catastrophic failure

Current unbalance/

Phase loss/Phase reverse

46

Detects an open or high-impedance phase

Ground fault

50G/N, 51G/N

Inverse and definite time. Early insulation-failure detection.

RTD temperature

38, 49

Optional protection (MPS-RTD module) for load-temperature monitoring

Overvoltage

59

Limits stress to insulation

Undervoltage

27

Detects a damaging brown-out condition

Voltage unbalance

47

Detects unhealthy supply voltage

Two setting groups

Minimizes Arc-Flash hazards during maintenance

Breaker control

Allows local and remote operation; reduces component count

Metering

Displays the measured and calculated parameters

Data logging

On-board 64-event recorder helps with system diagnosis

Communications

Remotely view measured values, event records, & reset trips

Conformal coating

Internal circuits are conformally coated to protect against corrosion and moisture

FPS SERIES

Feeder Protection System

Rev: 4-A-050213

Based on Manual Rev 0