WHAT ISRECLOSER CONTROL
FTU-R200 PROTECTIve RELAY
- Fault clearance functionality and RTU functionality
- Status monitoring – local and remote
- Configuration and Control – local and remote (complete)
- Power quality monitoring – local and remote
- Wave form recording - to a COMTRADE file
- Event recorder for fault analysis
- Metering – local and remote
- Communication – IP or serial
- Multi signalling protocol - DNP3, IEC 870-5-101, IEC 870-5-104, MODBUS

FUNCTIONALBLOCK DIAGRAM

MAINTENANCESOFTWARE

OVERVIEWMEETERING
- Currents, Voltages:
- RMS, Phases, Sequence components
- Harmonics to 31st
- Power :
- Apparent, Active, Reactive, Power factor
- Energy : 4-quadrant
- Frequency
- Demand Profile

4 QUADRANTSMETERING

PROTECTION
- Fault passage indicator
- When over-current element starts
- 3-stage over current protection (directional or non-directional)
- Fast and delayed TC trip elements for phase and earth fault
- 54 types of built-in TC Curves and 4 Customized TC Curves
- Definite time over-current element
- Definite time HCT (High Current Trip)
- SEF(Sensitive earth fault) detection
- Auto reclosing (up to 4 shots)
- Direct trip at high over current
- Cold load protection(pickup adjustment)
- Magnetizing inrush restraints
- Sequence coordination
- Open line detection
- Phase sync. fail detection
- Over voltage, under voltage, under frequency
- 4 setting groups, automatic setting group change depending on power flow

PROTECTIONCLASSICAL DIRECTIONAL ELEMENT
- Lagging fault current by line impedance.
- Cross polarized voltage with memory voltage
- Miss-operation for SLG in line with Delta transformer. (Phase angles of three phase currents are same.)
- Angular relationship of symmetrical sequence component currents and voltages can be used to determine direction to fault.

PROTECTIONIMPLEMENTED DIRECTIONAL ELEMENT IN FTU
- Positive sequence voltage and current are used to detect the direction of phase fault.
- Zero sequence voltage and current are used to detect the direction of ground fault.
- The final result is from the combination of two elements.
- Threshold of quantities can avoid wrong direction.

PROTECTIONRECLOSER TC CURVE
- Curve type : IEC, ANSI, Recloser, Customized
- Time multiplier
- Time adder
- Min. response time

PROTECTIONRECLOSER TC CURVE PARAMETERS

PROTECTION3 STAGES OC
- IDMT
- DMT
- High current (Instantaneous)
- The same reclosing sequence is applied to IDMT, DMT.
- High current has separate reclosing count

PROTECTIONSEF (SENSITIVE EARTH FAULT)
- Core balance CT for extreme low earth fault detection. (0.1A > 63KΩ)
- Core balance CT is needed for ungrounded system
- Residual zero-sequence voltage is calculated internally
- Adjustable protection zone -+30 – 90 degrees
- Cos/sin θ algorithm

PROTECTIONEARTH FAULT CURRENTS IN UNGROUNDED SYSTEM

PROTECTIONINRUSH RESTRAINT
- Magnetizing inrush current detection based on 2nd harmonic components in the current
- Cold-load pickup : Pickup is multiplied during cold-load time
- Inrush pickup : Pickup is multiplied during inrush time
PROTECTIONRECLOSING
- Fast reclosing offers a relative high probability of rapid restoration of service for overhead distribution line.
- 4 reclosing attempts to restore service before locking out.
- If fast reclosing is unsuccessful, the interrupter will go to lock out.
- Direct lockout at high current faults.
- Reclosing is generally not used for undergrounded feeders, as cable faults are more inclined to be permanent.
- Trip to lockout is settable for phase, ground fault, and SEF respectively
- Fast(instantaneous) element operation count can be set for phase and ground fault respectively
- Dead times are settable for each shot(reclosing)
- Separate dead times and reset time for SEF
- Single shot operation : If the fault occurs in the set time after closing, recloser goes to lockout
- Sequence coordination function is available
MONITORINGPOWER QUALITY
- Sag, Swell, Interruption Detection
- Status
- Events : Time-stamp, Magnitude, Duration
- Counters : Statistics for each phase, duration classified by IEEE 1159.
- Accumulated interruption time
- Waveform recording on events
- Logs to a COMTRADE file
- Harmonics
- THD (Total harmonic distortion)
- Each components up to 31th harmonics
- Events by threshold setting, Counter
- Unbalance
- Voltage & current unbalance
- Definite time characteristics

New Auto recloser Application
Hughes Protection Relay App is an unique tool for a modern Electrical Utility Linesman. Operation of the breaker, change of relay parameters etc.