ASHIDA Numerical 3OC + 1EF Protection Relay

Transcription

1 PROTH. ERR L5 PKP FAULT DT REC LOCK BF L6 L7 CLOSE TRIP ADR 241B Protection Features : 4 Element (3 Phase + EF + Sensitive EF) Over current IDMT/DMT with instant trip. Programmable (Non- Volatile) Setting by local keys as well as remote setting by communication port. Selection of Curve: Five selectable curve (Normal Inverse 1 (C1), Normal Inverse 2 (C2), Very Inverse (C3), Extremely Inverse (C4), Long Time Inverse (C5)) and Define Time (C6). Instantaneous Over-Current Protection with adjustable Timer. Breaker Failure Detection. In-built CB Trip Circuit Supervision function during pre closing and post closing of CB. Negative Sequence Over Current (46). Breaker TRIP/CLOSE operation directly from relay keypad. Relay Design Features : Large 20x4 LCD display for Parameter and setting display. Disturbance Recorder. Up 3 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 standard open protocol. IEC Separate Communication Port for SCADA (RS485) as well as Local Testing (RS232C) Very low burden on CT (less than 0.5VA). 2 Setting Groups. Continuous monitoring of module s internal hardware and alarm generation in case of failure of any critical components. Facility to synchronised Relay time from SCADA. 6 Digital Output contacts for local alarm as well as tele-signalling 8 Optically isolated digital status input for monitoring of status to avoid use of external relay logic. 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. Page 1 / 13

2 10 nos of Fault data stored with keypad interface and time stamping. Description : ADR241B is second generation of Numerical Over current IDMT/DMT Relay. It consist all the necessary protection and monitoring functions required for Normal feeder, 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 phase current and E/F 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 or 60Hz depending upon setting, thus relay remain stable during distorted waveform by various industrial load. All these measure values are then used for different protection function such as IDMT Over current protection, Instantaneous Over current protection, E/F protection etc. These measured values are also displayed on large 20 x 4 LCD display for metering purpose. The DSC also monitors different digital input through optical isolator and perform some monitoring function such trip circuit supervision, and control potential free contact for control CB and generate ALARM and Tele-signalling. 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 types of power supply modules available 1) having range of 77Vdc 250Vdc. Covering requirement of 110Vdc and 220Vdc station battery system 2) Wide range setting 18 Vdc 250 Vdc. 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 Relay R1 to R6, digital status input and controlled output are fully programmable via key pad interface. Main Functions : The ADR241B are having following protection functions stages of Phase Over Current element. (Ip1>, Ip2>, Ip>> and Ip>>>) stages of 3Io (Internally derived EF) (3Io>, 3Io>> and 3Io>>>) stages of Ie (Externally EF or REF) (Ie>, Ie>> and Ie>>>). 4. Trip Circuit Supervision. 5. Breaker Failure Detection. 6. Monitoring Functions. 7. Auto Recloser Relay (ARR). 8. Negative Phase Sequence. 9. Relay / Led configuration. Page 2 / 13

3 Each of these functions are independently programmable and can be enabled or disabled by user depending upon the requirement. Over Current Element : The ADR241B is member of Ashida Numerical Relay family design for protection general feeder. The relay has three independent stages of Over Current (Ip1>, Ip2>, Ip>> & Ip>>>). Stage 1 (>) Stage 2 (>>) can be programmed as IDMT or definite time. All major international IDMT curves are available. Stage 3 (>>>) can be programmed instantaneous or define time. Range of for stage 1 and 2 is 10% to 250% for Phase. The output of stage 1 (Ip1>, Ip2>) is separate and not connected to trip contact. The output of Ip1>, Ip2> can be assigned to any of 6 programmable relay through key board. While output of Ip>> and Ip>>> is connected to trip element. Thus Ip1>, Ip2> can be used as ALARM before TRIP or can be used to TRIP another CB before tripping main CB. Although the curves tend towards infinite when the current approaches Is (general threshold), the minimum guaranteed value of the operating current for all the curves with the inverse time characteristic is 1.1Is (with a tolerance of ± 0.05Is). Earth Fault Element : The Relay has two different type of Earth Fault one is marked as 3Io and another is marked as Ie. The 3Io is derived internally by software through phase current while Ie is measured from external CT. Thus Ie can be used as Core Balance CT (CBCT) or Restricted EF (REF) each EF is having 3 stages (>, >>, & >>>). Stage 1 (>) stage 2 (>>) can be programmed as IDMT or definite time. All major international IDMT curves are available. Stage 3 (>>>) can be programmed instantaneous or define time. Range of stage 1 and stage 2 for 3Io is 10% to 100%, and for stage 3 of 3Io is 50% to 1200%. The Range for EF is from 5% to 80% for stage 1 and stage 2 and 50% to 1200% for stage 3 The output of stage 1 (Ip1>, Ip2>) is separate and not connected to trip contact. The output of stage 1 can be assigned to any of 6 programmable relay through key board. While output of >> and >>> is connected to TRIP element. Thus I> can be used as ALARM before TRIP or can be used to TRIP another CB before Tripping main CB. Inverse Time Curves : The each stage thresholds for phase (earth) over current can be selected with an Inverse Definite Minimum Time (IDMT) characteristic. The Time Delay is calculated with a mathematical formula Curve Type t = K * a I b Iref Description a B C1 Standard Inverse_ C2 Standard Inverse_ C3 Very Inverse C4 Extremely inverse 80 2 C5 Long Time Inverse C6 Define Time - - The separate output contact allows to use each stage for independent function such as stage 1 1 Page 3 / 13

4 can be used for ALARM stage 2 for tripping or both can be use for tripping independent CB. Each stage can enable or disable depend upon application. Trip circuit Supervision : The ADR241B is having 2 separate digital optocoupler status input which can be used to continuously monitor the continuity of trip-circuit. The general scheme is as shown in fig.4 Relay monitor Trip coil continuity through CB NO during close condition and through CB NC during Trip condition. If any discontinuity is observed it generate ALARM signal. The output marked as PROTH (Protection Healthy) is normally is ON and become OFF at following condition When DC supply is not sufficient (DC Fail) When T1 and T2 both active and both inactive. i.e CB NO as will as CB NC are both close or open. Relay detects any internal hard ware Error. B+ B- TC TCCOM CB NO CB NC T1 T To Relay CPU To Relay CPU Fig.4 Trip Circuit Logic Auto Recloser Logic: The ADR241B is provided with 4 Shot Auto Recloser function. There are 5 timer for auto recloser 1) Dead Time for shot 1 (DT1) 2) Dead Time for shot 2 (DT2) 3) Dead Time for shot 3 (DT3) 4) Dead Time for shot 4 (DT4) and 5) Reclaim Time (RT). After clearing of fault ADR241B trigger dead Time 1 i.e DT1. After the time delay Relay provides reclose command and start reclaim timer RT. If Second fault occur during RT relay trigger Dead Time 2 i.e DT2. If Third fault occur during RT relay trigger Dead Time 3 i.e DT3, If Fourth fault occur during RT relay trigger Dead Time 4 i.e DT4 and after Time Delay it again provide reclose command and retrigger RT. If Fifth fault occur during RT, Relay generates Lock-Out alarm and block further reclose. The Lock-Out condition can be reset locally as well remotely by SCADA through communication digital status input. Breaker Failure Detection : Normally after tripping, current should become Zero within ms in steps of 50ms time depending upon type of fault and breaker mechanism. After Fault ADR241B trigger internal timer (settable from 0.1s to 1.0s) if fault is not cleared during this time then Relay declares 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. Negative sequence over current (46) The ADR241B relay will be provided with programmable function to detect Unbalanced Fault conditions. When Earth Fault elements do not operated or not sufficiently sensitive. The ADR241B relay is included with Negative Phase Sequence Over Current element it can be programmed as IDMT or Definite Time. Page 4 / 13

5 Programmable DI/DO and LED:- The ADR241B Relay is provided with 6 digital outputs, 8 opto-isolated 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. Setting Group: The ADR241B Relay is provided with two setting groups i.e. G1 and G2. Any One group is active at a time. The setting group can be changed from digital input, this allow user to change relay setting dynamically as per the outgoing CB load condition. from pick, trip operation of relay. This waveform can be downloaded through communication port for further analysis. Relay Talk Software: The general communication software is provided to communicate with relay, known as Relay Talk. By using this software data such as event log, disturbance records etc can be down loaded for 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. Monitoring Functions (Event, Disturbance Record):- Apart from basic protection functions. Relay continuously monitors all substations operation through status, it internal functions, internal hardware etc. if any change is observed it is marked as event. This events are stored in internal non-volatile memory along with time stamped. Following are some of the events recorded, Relay PKP, Relay Reset, CB Trip, CB Close, Change of any digital status input, Relay setting changed etc. Up to 100 such events can be stored and can be download for detailed analysis. Apart from Event record Relay 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 3 sec. The disturbance record can be trigger from physical status input as well as Page 5 / 13

6 Following as some of software clips All The data can view at time Event list with real time Page 6 / 13

7 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 7 / 13

8 While Ordering Specify the following Information for ADR241B Relay Definition of Model No of Aditya Series of Relays AM XXX XX X X XX X Reserved for Future Use PT Secondary 0 = NO PT 1 = 63.5 PT sec Auxiliary Supply 01 = V dc 04 = 30 V dc 02 = V dc 05 = 48 V dc 03 = 24 V dc 06 = Vdc CT Secondary 1 = 1 Amp. 2 = 5 Amp. 3 = 1 Amp. / 5 Amp. Selectable AM XXX XX X Over current Earth Fault Relay For Adity-V2 series start from 201. For V1 series refer respective document Obsolete Version CSE H Relay with Standard Back Connections CSE H Ordering information: A D R B - A M - X X X - X X - X - X - X X - X Example ADR241B AM with standard output Contacts St. Back terminal layout Cabinet Type: CSE - H Auxiliary Supply: Vdc CT sec: 1 Amp. / 5 Amp. selectable. Page 8 / 13

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 VDC to be specified. 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 : Within 1.1 times of set value VIII. Reset Value : 95% to 90% of pick up. IX. Output Contact : 2 for Trip : 1 for Reclose : 1 for PROTH. : 1 for RLock : 6 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 : 1 for CB NO : 1 for CB NC : 8 as general programmable XII. Thermal With stand for CT : 20 x of rated for 3.0 sec. XIII. Setting Group : Two (G1 and G2) General Settings 1. : Unit ID in step of 1 : Baud Rate : Com Port RS232 / RS485 : Set Parity None / Even / Odd : Group Selection G1 / G2 : BF Enable YES / NO : BF Delay msec in step of 50msec : CT Sec 1A / 5A : CT Primary in step of 1 : Local Control YES / NO : Trip Ckt Test YES / NO : Trip Cont SR / HR : Trip Led SR / HR Page 9 / 13

10 Phase Section (Ip) XIV. Phase (OC G1 ) External Earth Fault Section (Ie) XV. EF G1 : IP1> Enable YES / NO : IP1> Settings 10% 250% in steps of 1%. : IP1> Time Multiplier (TMS) x0.02 x1.00 in steps of 0.01 : IP1> Curve (Operating Time) C1 C6 ( IDMT curve C1 C5 or Define Time C6 ) : IP1> C6 Delay Sec in steps of 0.1Sec. : IP2> Enable YES / NO : IP2> Settings 10% 250% insteps of 1% : IP2> Time Multiplier (TMS) x0.02 x1.00 in step of 0.01 : IP2> Curve (Operating Time) C1 C6 ( IDMT curve C1 C5 or Define Time C6 ) : IP2> C6 Delay Sec in steps of 0.1Sec. : IP>> Enable YES / NO : IP>> Settings 10% 250% insteps of 1% : IP>> Time Multiplier (TMS) x0.02 x1.00 in step of 0.01 : IP>> Curve (Operating Time) C1 C6 ( IDMT curve C1 C5 or Define Time C6 ) : IP>> C6 Delay Sec in steps of 0.1Sec. : IP>>> Enable YES / NO : IP>>> Settings 50% 3000% insteps of 10% : IP>>> C6 Delay Sec in steps of 0.01Sec. : IE> Enable YES / NO : IE> Settings 5% 80% insteps of 1% : IE> Time Multiplier (TMS) x0.02 x1.00 in step of : IE> Curve C1 C6 (Operating Time) ( IDMT curve C1 C5 or Define Time C6 ) : IE> C6 Delay Sec in steps of 0.1Sec. : IE>> Enable YES / NO : IE>> Settings 5% 80% insteps of 1% : IE>> Time Multiplier (TMS) x0.02 x1.00 in step of : IE>> Curve C1 C6 (Operating Time) ( IDMT curve C1 C5 or Define Time C6 ) : IE>> C6 Delay Sec in steps of 0.1Sec. : IE>>> Enable YES / NO : IE>>> Settings 50% 1200% insteps of 10% : IE>>> C6 Delay Sec in steps of 0.01Sec. Page 10 / 13

11 Internally derived Earth Fault Section (3Io) XVI. 3Io G1 Negative Phase sequence Element (46)`Section XVII. NPS G1 Additional data Auto Recloser Section XVIII. : 3Io> Enable YES / NO : 3Io> Settings 10% 100% insteps of 1% : 3Io> Time Multiplier (TMS) x0.02 x1.00 in step of : 3Io> Curve C1 C6 (Operating Time) ( IDMT curve C1 C5 or Define Time C6 ) : 3Io> C6 Delay Sec in steps of 0.1Sec. : 3Io>> Enable YES / NO : 3Io>> Settings 10% 100% insteps of 1% : 3Io>> Time Multiplier (TMS) x0.02 x1.00 in step of : 3Io>> Curve C1 C6 (Operating Time) ( IDMT curve C1 C5 or Define Time C6 ) : 3Io>> C6 Delay Sec in steps of 0.1Sec. : 3Io>>> Enable YES / NO : 3Io>>> Settings 50% 1200% insteps of 10% : 3Io>>> C6 Delay Sec in steps of 0.01Sec. : I2>> Enable YES / NO : I2>> Settings 10% 100% insteps of 1% : I2>> Time Multiplier (TMS) x0.02 x1.00 in step of : I2>> Curve C1 C6 (Operating Time) ( IDMT curve C1 C5 or Define Time C6 ) : I2>> C6 Delay Sec in steps of 0.1Sec. : I2>>> Enable YES / NO : I2>>> Settings 50% 1200% insteps of 10% : I2>>> C6 Delay Sec in steps of 0.01Sec. : C1 Std. Inverse. 1 (3.0S) : C2 Std. Inverse 2 (1.3S) : C3 Very Inverse : C4 Extremely inverse : C5 Long Time Inverse : C6 Define Time (00 99 Sec In steps of 1.0s.) : Numbers of shot : 0 4 / 0 = bypass : Dead Time 1, 2, 3, 4 : 0.1S 180s : Relaim Time : s Operational Indicators (Flags) XIX. PROT.H /ERR : Green LED indicates Relay OK (Protection Healthy) : Red LED indicates Fault in following condition. 1. Problem in relay Hardware. 2. Trip Circuit Fault Page 11 / 13

12 PICK-UP / FAULT DT / REC LOCK / BF L5 / L6 / L7 CLOSE / TRIP Drawing References XX. : Green LED indicate Start of timer Self Reset (SR) Type : Red LED indicates FAULT Hand Reset (HR) Type. : Green LED indicate Dead Time : Red LED indicate Reclaim time : Green LED indicate ARR lock-out (HR) Type : Red LED indicate Breaker Fail (HR) Type : Spare LEDs Programmable : Green LED indicate output close relay contact closer (SR) Type : Red LED indicates Output trip relay contact closer (SR) Type : For Back Connections - ADV02402 : For Typical External connection - ADV02303 : For Typical External connection - ADV02304 : For Cabinet Type - MAC01301 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. IX. Power frequency immunity test Power frequency magnetic field test Radiated electromagnetic field disturbance Conducted Disturbance induced by Radio Frequency field : 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 : IEC / IEC : : Freq. 150kHz 80MHz, Amplitude 10 V, Modulation 80% 1 KHz Page 12 / 13

13 X. AC Ripple in DC supply Test : IEC XI. Radiated emission : 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 Original Specification Page 13 / 13

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