TECHNICAL SPECIFICATIONS FOR 11 kV AND 33kV OVERHEAD LINE

FAULT PASSAGE INDICATORS (FPIs) WITH BI-DIRECTIONAL

COMMUNICATION SYSTEM

SCOPE:

Supply of overhead line fault passage indicators (FPIs) for overhead lines, meant to be

installed on 11 kV and 33kV lines, along with RF-GSM based RTU for bi-directional

communication between FPIs and control center.

PURPOSE:

The purpose is to identify the faulty sections in overhead lines. The FPI shall indicate

transient faults, temporary faults and permanent faults.

FPI OPERATION:

The Fault Passage Indicator shall operate on passing over of the absolute threshold

current (user settable).

TRIP CURRENT:

Trip current for the FPIs shall be settable by the user. FPIs shall constantly monitor,

measure the line current and evaluate the same. In case current exceeds a preset value,

a fault has to be indicated. Alternatively, there shall also be an “Automatic Mode”, in

which the FPIs will get adapted to the service current.

FAULT TYPES:

The FPI shall detect and indicate phase to phase faults. In addition to this, the FPI

shall also detect and differentiate between transient, temporary and permanent faults.

INRUSH RESTRAINT:

The FPI shall be equipped to filter out the inrush current due to transformer

magnetizing currents thus avoiding the possible false indication of faults.

INDICATION:

The FPI shall locally indicate faults by means of bright LEDs (minimum 6 LEDs) so

that the indication is clearly visible during night times and by means of a red luminous

flag, so as to be clearly visible in the bright sunlight during day times. Further, FPIs

shall transmit the fault information to RF-GSM based RTU for onward

communication to SCADA / control center.

RESET:

Once the fault is cleared, the FPI shall reset itself upon the power return (If required it

shall be possible to disable this automatic reset at site.) It shall also have a facility of

resetting with settable time duration, remote reset and manual reset.

TRANSIENT FAULT EVOLUTION:

If FPI is busy in flashing on transient fault and if the permanent fault occurs, the FPI

shall automatically change the priority and shall start flashing differently to show the

permanent fault; thus helping maintenance crew to review the priorities.

POWER / BATTERY:

The FPIs shall be powered by inductive pickup from the 11kV conductor with a

minimum operating current of 20A. During faults, when the system is down, FPIs

shall be powered by lithium battery. The lithium battery provided inside the FPI shall

be replaceable type, in case of battery failures. The battery shall have a life of up to 10

years or indicating time of 1000 hours.

TEST AND RESET:

The FPI shall be equipped with remote Test and Reset features, so that the

functionalities including status of battery and flag can be tested without dismounting

the FPI from the line.

INSTALLATION:

The FPIs shall be suitable for installing on overhead line conductors using hotsticks,

while the line is in charged condition.

SETTINGS:

The settings for the FPI shall be programmable both at site as well as from control

center, without dismounting the FPI from the line. Following parameters shall be user

programmable.

Trip Current

Response Time

Reset Time

Turn On / Off indication for Transient Faults and Temporary Faults

Turn On / Off auto-reclosure support function and related parameters

REMOTE CONTROL UNIT:

The FPI shall be supplied along with suitable Remote Control Unit, having a LCD

display, capable of performing the following operations at site.

Perform Test / Reset operations by standing below the FPIs.

View settings of various parameters of the FPI like trip current, response time,

reset time, temporary fault indication status, transient fault indication status,

auto-reclosure support status etc.

Set various parameters of the FPI like trip current, response time, reset time,

temporary fault indication status, transient fault indication status,

autoreclosure support status etc.

Perform battery check and flag check.

View real-time value of the current flowing though the 11kV line on which a

particular FPI is installed. This current shall be indicated in terms of Amps

(A).

Operating range for the Remote Control Unit shall be minimum 30m radius.

RF-GSM RTU:

The RTU or the data transmission unit shall be pole-mountable and solar powered.

The RF module of the RTU shall communicate with the FPIs while the GSM module

shall communicate with the control center / SCADA. On getting the fault information

from the FPI, the RTU shall process and suitably communicate the information to the

control center / SCADA through GPRS. The RTU shall also enable programming of

the FPIs by obtaining configuration file from the control center / SCADA over GPRS

and updating the same in the FPIs over RF. Programming of the FPIs shall include

configuring parameters like trip current, response delay, reset time, reset type, etc.,

remotely from control center / SCADA over GPRS. The system shall facilitate remote

reset command to be executed from the control center / SCADA. If it is required that

the FPI-RTU system be integrated to existing SCADA, the same shall be compatible

with generic concentrators / routers on IEC-104 protocol.

SOFTWARE:

If implemented as a stand-alone solution, suitable software shall be provided for

monitoring the field devices, i.e. FPIs and RTUs from the control center over Internet.

This software shall be user-friendly and Windows based. This software shall enable

easy navigation of field RTUs and FPIs on a map. The software shall be web-based

and accessible though standard Internet browser. The software shall indicate the status

of FPIs, settings and alarms if any. The software shall have the capability to modify

the settings of the FPIs installed in the field over GPRS. Adequate security levels shall

be provided.

Distribution Voltage 6 to 33 kVPower Frequency 50 HzConductor Diameter 10 to 28 mmCurrent setting trigger value 40A to 1500A and Automatic ModeResponse Delay 40 ms to 300 msFlash duration 30 Mins to 720 MinsInrush transient restraint 2 sec.Automatic Reset Recovering Service Current >4 ATimer reset 30 Mins to 720 MinsLocal fault indication Bright Red flash light (LEDs) and Red DiscPower supply Lithium battery with life up to 10 yearsProtection Level IP 67EMI immunity As per IEC 801-4 and VDE 0843Outdoor weathering test As per IEEE 495:2007Temperature cycle test As per DIN EN 60068-2-14:2000-08Salt fog test As per DIN EN 60068-2-11:2000-02

SYSTEM CPU 2 bit ARM ProcessorData Collection Memory EEPROM or SD Card slotReal Time Clock With Lithium BatteryCONNECTIVITY Ethernet 10/100 MBPS Ethernet portSerial 1RS232 PortsGPRS, SMS GSM/GPRS ModemSensor Interface RS485 PortSOFTWARE PROTOCOLS

Application ProtocolsSNMP, SMTP, FTP, MODBUS RTU, XML and IEC-104

DIGITAL INPUTSNo of Inputs 8 Digital InputsType of Input Active low/highANALOG INPUTSNo of Inputs 4 Analog InputsResolution 10 BitsInput Range 0 to 10 Volts / 0 to 20mAMax Voltage 12 VoltsOUTPUTNo of Outputs 4 Open Collector OutputsType of Output 100mAPower Supply 12V DC – Solar PoweredOperating Temperatures 0 to 50 Deg CProtection Level IP65

FLA3 - Overhead Line Fault Passage Indicator

RF-GSM RTU