Type: ADR233A (ADITYA V2 Series) (Preliminary) ASHIDA Numerical 3 Phase Tx. Differential Protection Relay

Transcription

1 Ashida Numerical 3 Directional Phase Tx. 3O/C Differential + 1E/F Protection PROTH. ERR FAULT 87 L5 L6 REF L7 BF TRIP ADR 233B_V2 233A_V2 Protection Features: 3Phase Tx. Differential Protection + REF Programmable (Non- Volatile) Setting By local keys as well as remote setting by communication port Latching of fault current value. Operation base on fundamental frequency value. Harmonics restrain for Tx charging and CT saturation condition. Breaker Failure detection. Cross harmonics restrain. Programmable starting current. Programmable Internal ICT( interposing CT) ratio to match different transformer having different vector groups Programmable dual bias setting Wide setting range 10-50% for bias in steps of 5% Programmable 2nd HRM restrain 10% - 80% Design Features: Large 20x4 LCD display for Parameter and setting display Disturbance Recorder. Up 1 sec of actual waveform of current along with logical and physical status, are captured & saved in the built-in memory with date time stamping, for analyzing fault condition & fault location. Fully communicable with IEC or IEC61850 protocol Very low burden on CT (less than 0.5VA) Continuous monitoring of module s internal hardware and alarm generation in case of failure of any critical components. Facility to synchronised time from SCADA 5 Digital Output contacts for local alarm as well as tele-signalling 5 Optically isolated digital status input for monitoring of status and avoid used of external relay logic Page 1 / 11

2 100 nos of event memory, event such CB close, Trip, digital status change, relay pkp etc. All events are with date and time stamped up to 1ms. 10 nos of Fault data stored with keypad interface and time stamping. Description: ADR233A is second generation Numerical Transformer differential. It consist all the necessary protection and monitoring functions required for transformer, it consist of 1. High Speed Digital DSP Controller 2. Analog Measuring Module 3. Power supply Module 4. Digital Input output module. The High speed Digital Signal Controller continuously monitors line HV and LV current + REF current. Along with different status input, through CTs, and optical isolated status connections. The high-speed micro-controller samples these current signals through a A/D converter. The Digital Signal performs powerful Numerical Algorithms to find out RMS of fundamental & harmonic contents of the current. All measurement is tuned to fundamental frequency i.e 50Hz, thus relay remain stable during distorted waveform generated electronics loco-motive. All these measure values are then used for different protection function.. These measured values are also displayed on large 20 x 4 LCD display for metering purpose. The DSC also monitor different digital input through optical isolator and control potential free contact for control CB and generate ALARM and Telesignalling. The power supply module is basically DC DC converted designed using modern PWM based Switching mode technique to convert 110Vdc station battery supply to the 12V and 24Vdc low voltage supply for relay electronics and control circuit. It also provides necessary isolation from station battery. There are two type of power supply modules are available 1) having range of 77Vdc 250Vdc. Covering requirement of 110Vdc and 220Vdc station battery system 2) having range of 18Vdc to 52Vdc covering 24Vdc, 30Vdc, 48Vdc station battery requirement. The relay is having total 8 nos of dual LED of high intensity for easy identification of type of fault for easy user interface. LEDs L5, L6 and L7 and R1 to R5, digital status input and controlled output are fully programmable via key pad interface. Main Functions The ADR233A are having following protection functions. 1. Transformer differential protection. 2. REF protection. 3. Breaker Failure Detection. 4. Monitoring Functions. Each of these functions are independently programmable and can be enable or disable by user depending upon requirement Page 2 / 11

3 Differential Protection (87): The ADR233A monitor HV and LV current of power transformer through respective CT. The sample current values are processed by power fully DSP controller. It convert the these current samples in to equivalent vectors and numbers of parameter such as RMS values of IHV and ILV and phases. IHV represent HV current and ILV represent LV current. Normally to match HV and LV CT ratio, phase shift between two winding due to transformer vector group, ICTs (interposing CTs) are needed. In ADR233A ICTs are software selectable. There are two separate ICT ratio and vector groups are provided, one for HV value and another for LV value. After applying this corrective factor, relay calculate operating and restring signal from IHx and ILx (IH1 and IL1 is HV and LV current after applying ICT correction factor. x denote phase, 1 for R, 2 for Y and 3 for B). Base on this and setting relay decide to operate or restrain. Operating Current Iox = IHx ILx Restraining Current Ibx = ( IHx + ILx ) / 2 operate when Io is greater than pick-up current setting and Iox > = S Ibx Where S = set bias. (Slope 1) The relay support dual bias characteristic. The bias (slop 1) is settable from 10% to 50% This is a normal bias characteristic. The relay follows this characteristic up to Ibx become equal to 2nd Bias I setting. During heavy through fault due to CT saturation large difference current might generate, which lead to mal operation of relay. To prevent mal operation during such heavy through fault relay is provided with dual bias characteristic. In which after 2nd Bias I setting the relay change it bias setting from set value to 80% SLOP 1 SLOP 2 automatically. The relay is provided with differential highest protection where IHx-ILx is greater than a preset value relay will provided high-set protection. High-set setting can be bypassed when it is not required. The relay detect transformer charging condition from 2nd harmonics contents. If 2nd harmonics are more than set limit then relay block tripping operation. Similarly relay detect over excitation condition from 5th and restrain it operation. Most of the relays are multifunction and having large numbers of setting. The ADR series relay Page 3 / 11

4 having big 4 line 20 character back lit LCD display and very strong user interface, this make very easy to manage the relay setting. All setting are arranged in menus for easy understanding of parameter Restricted Earth Fault: The relay is equipped special REF protection section for transformer winding. The setting for REF protection is 5% to 80% of rated. The relay give instant trip command as soon as it detected EF in restricted zone. Maximum settings in one display The relay shows all the parameters such current before ICT current after ICT, Primary current, Bias and difference current. Breaker Failure Detection:- Normally after tripping current should become Zero within ms time depend upon type of fault and breaker mechanism. After Fault ADR233A trigger internal timer (settable from 0.1s to 1.0s) If fault is not cleared during this time then relay declare as Breaker fail (LBB function) and change another contacts. This contact is marked as Breaker Fail can be used to trip back up breaker or can be used to generate ALARM signal. Programmable DI/DO and LED:- The ADR233A has got 5 digital outputs, 5 optoisolated input and 6 general purpose LEDs. These can be programmed by local key board. Any logical of physical status can be assigned to any relay contact The logic of digital status input as well as logical status can be formed and assigned to any of the relay output. The disturbance record can be trigger from external logical input. Monitoring Functions (Event, Disturbance Record):- Apart from basic protection functions. is continuously monitors all substations operation through status, it internal functions, internal hardware etc. if any changed is observed it Page 4 / 11

5 marked as event. Such type of events is stored in internal non-volatile memory along with time stamped. Following some of the events. PKP, Reset, CB Trip, CB close, Changed of any digital status input, setting changed etc. Up to 100 such event can be stored and can be download for detailed analysis. Apart from Event record also record actual waveform of current along with all digital and logical status during fault condition. Up to 10 such waveforms can be recorded, the duration of disturbance record is 1 sec. The disturbance record can be trigger from physical status input as well as from pick, trip operation of relay. This waveform can be downloaded through communication port for further analysis. By using this software data such as event log, disturbance records etc can be down loaded and can be further analysis. The disturbance record data can be saved in standard COMTRADE Format which is understandable by numbers of relay testing units for play back. Talk Software: The general communication software is provided to communicate with relay, known as Talk. Following as some of software clips All The data can view at time Page 5 / 11

6 Event list with real time The waveform and logical and physical status latched by relay can be view and analysed Data can be viewed as raw sine wave or RMS value Page 6 / 11

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8 While Ordering Specify the following Information for ADR233AA Definition of Model No of Aditya Series of s AM XXX XX X X XX X Reserved for Future Use PT Secondary 0 = NO PT 1 = 63.5 PT sec CT Secondary 1 = 1 Amp. 2 = 5 Amp. 3 = 1 Amp. / 5 Amp. Selectable Auxiliary Supply 01 = V dc 06 = 110 V dc 02 = V dc 07 = 220 V dc 03 = 24 V dc 04 = 30 V dc 05 = 48 V dc AM XXX XX X Over current Earth Fault For Adity-V2 series start from 201. For V1 series refer respective document with standard Back Connection with IEC Communication with standard Back Connection with IEC61850 Communication CSE H CSE H Ordering information: A D R A - A M - X X X - X X - X - X - X X - X Example ADR233A AM with standard setting IEC com St. Back terminal layout Cabinet Type: CSE -150 H Terminal Removable Auxiliary Supply: Vdc CT sec: 1 Amp. / 5 Amp selectable Page 8 / 11

9 Technical Specifications: General specifications Sr. No. Specification Particulars I. Current Input : Suitable for CT secondary 5 Amp. or 1 Amp site selectable II. Aux. Supply : VDC. Or 18V 52V to be specify III. VA burden on CT : Less than 0.2VA IV. VA burden on Aux. : Less than 10 Watts V. Operating Temp. range : -10 deg. To + 65 deg. VI. Continuous Current carrying capacity : 2 x of rated VII. Pick up : with in 1.1 times of set VIII. Reset Value : 95% to 90% of pick up. IX. Output Contact : 2 for Trip : 1 for REF Trip : 1 for BF : 1 for PROTH. : 1 for RL OK : 5 for General Programmable X. Contact Rating : Continuous: 5A : Make & carry for 0.5 sec : 30A : Make carry for 3 sec : 15A XI. Opto Isolated input general programmable : 2 + common Input : 5 -ve common XII. Operating Time : Diff < 40ms at 2 times :REF < 25ms at 5 times XIII. Thermal With stand for CT : 20 x of rated for 3.0 sec. Differential Protection (87) XIV. Vector group compensation for HV winding Vector group compensation for LV winding REF section (Ie) XV. Ie : 87 OFF/ON : Operating Current (Io) 10% - 100% insteps of 1% : Bias : 10-50%. In steps of 5% : 2 nd Harm. Restrain : 10% to 80 % settable : High Set setting : 100% to 2000% in steps of 100% : 2 nd Bias I 100% -400% insteps of 50% : VH:- Yy0,Yy2,Yy4,Yy6,Yy8,Yy10,Yd1,Yd3,Yd5, Yd7,Yd9,Yd11,Ydy0 and Ydy6 : VL:- Yy0,Yy2,Yy4,Yy6,Yy8,Yy10,Yd1,Yd3,Yd5, Yd7,Yd9,Yd11,Ydy0 and Ydy6 :Ie> : OFF / ON :Ie> 5% - 80% insteps of 5% Page 9 / 11

10 Breaker Fail (BF) XVI. :BF OFF/ON :BF delay : 0.1S 1.0s XVII. Operational Indicators (Flags) PROT.H /ERR : Green LED indicates OK (Protection Healthy) : In case of following condition led become Red 1. Problem in relay Hardware. FAULT - 87 : Red LED indicates FAULT Hand Reset (HR) Type. REF : Red LED indicate REF Fault XVIII. BF L5 / L6 / L7 TRIP Drawing References : Green LED indicate Breaker Fail (HR) Type : Spare LED Programmable : Green LED indicates Output trip relay contact closer (SR) Type : For Cabinet Type - MAC01302 : For Back Connections - ADV01301 : For Typical External connection - ADV01401 : For Draw-out Arrangement - MAC01303 Sr. No. Title Standard no. Electromagnetic Compatibility Type Test : I. High Frequency test : IEC , class III : Frequency : 1MHz Damped Oscillatory : Longitudinal :5 KV (peak) : Duration: sec duration 2 sec. : Between input current Terminal II. Electrostatic discharge Direct application : IEC Class III and IEC class III. : Contact discharge: 6kV, : Air discharge: 8KV : Polarity: both +ve and Ve polarities. III. Indirect application : IEC , Class-III IV. Fast transient disturbance V. Surge immunity test VI. VII. VIII. Power frequency immunity test Power frequency magnetic field test Radiated electromagnetic field disturbance : IEC and IEC , class A : 1.2KV; 5/50ns; 5KHz burst duration = 15ms. : Repetition rate 300ms; Both polarities; Ri = 50Ω; duration 1 min. : IEC / IEC class 4 : Differential Mode = 2kV : Common Mode = 4kV : 1.2/50uS, 5 surges of each polarity : IEC , Class-A : IEC , Class-V : IEC : EN : Frequency 80MHz 1GHz Page 10 / 11

11 IX. Conducted Disturbance induced by Radio Frequency field X. AC Ripple in DC supply Test XI. Radiated emission : IEC : IEC / IEC : : Freq. 150kHz 80MHz, Amplitude 10 V, Modulation 80% 1 KHz : IEC Insulation tests: XII. High Voltage Test : IEC class III : At 2.5kV 50Hz between all terminal connected together and earth for 1 minutes XIII. Impulse Voltage Test : IEC class III : Test voltage: 5KV (peak) 1.2 / 50us, : Energy :0.5 J, : Polarity : + ve and Ve : Nos. of impulses : 3 positive and 3 negative impulse : Duration between Impulses : 5 sec. Environmental tests: XIV. Cold test Storage test : IEC XV. Dry heat test : IEC XVI. Damp heat test, steady state : IEC XVII. Damp heat test, cyclic : IEC CE compliance XVIII. Immunity : IEC XIX. Emissive Test : IEC XX. Low voltage directive : EN Mechanical tests XXI. Vibration : IEC class 1 : Frequency Range = 10Hz 150Hz, acceleration. = 1g n (9.8 m/s 2 ) : Sweep rate 1 octave/min; 20 cycle in 3 orthogonal axis. XXII. Shock and bump : IEC XXIII. Seismic : IEC Revision Date Description Jan 2008 Original specs Page 11 / 11

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