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XRW1-4

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Mains decoupling relay for wind power systems

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Summary of Contents for XRW1-4

Page 1: ...XRW1 4 Mains decoupling relay for wind power systems...

Page 2: ...Number of measuring repetitions T for frequency functions 6 2 4 Threshold of frequency supervision 6 2 5 Tripping delays for the frequency elements 6 2 6 Parameter setting of frequency gradient 6 2 7...

Page 3: ...al filtering of the measured values by using dis crete Fourier analysis to suppress higher harmonics and d c components induced by faults or system op erations Integrated functions for voltage and fre...

Page 4: ...ting threshold of the blocking and reset inputs how ever has to be defined by taking the supply voltage into account The following two different operating thresholds can be adjusted Low range treshold...

Page 5: ...and measuring values can be achieved by HTL PL Soft4 The XRW1 4 can be connected to other units of the PROFESSIONAL LINE or the HIGH TECH LINE via interface If there are more than one relay in the sy...

Page 6: ...lements The front plate of the XRW1 4 protection relay com prises the following operation and indication elements Alphanumerical display 4 Digits Push buttons for setting and other operations LEDs for...

Page 7: ...ES NO SELECT RESET one time for each value U4 tU4 tU4 rated frequency setting value in Hz SELECT RESET fN frequency measuring repitition setting value in periods SELECT RESET T frequency element f1 tr...

Page 8: ...left on of the front are lit green during setting and inquiry procedure of the setting values which are printed on the left side next to the LEDs The LEDs will light up red after activation of the se...

Page 9: ...r the 2nd overvoltage step V 4 800 tU2 Tripping time for the 2nd overvoltage step s 0 2 1500 tU2 back Reverse run of the 2nd tripping time is active YES NO U3 Pick up value for the 3rd overvoltage ste...

Page 10: ...ts caused by fault induced transients or other system dis turbances The microprocessor continuously compares the measured values with the preset thresholds stored in the parameter memory EEPROM If a f...

Page 11: ...based in general on the time measurement of complete cycles whereby a new measurement is started at each voltage zero passage The influence of harmonics on the measuring result is thus minimized J K J...

Page 12: ...econds because regulator effects be come here not marked out yet Typical frequency gra dients during application of mains decoupling are in the range of 0 5 Hz s up to over 2 Hz s The XRW1 4 detects t...

Page 13: ...instantaneously released instantaneously released after 1 s released after 5 s 3 supply voltage is switched on blocked for 200 ms blocked for 200 ms blocked for 1 s blocked for 1 s 4 3 phase measuring...

Page 14: ...s push button is also used for re setting the display by pressing approx 3s Push buttons are used for in decrementing of the parameter indicated on the display They can be pressed step by step or cont...

Page 15: ...front plate optically Here not only the faults are in dicated but also the faulty phase s and the protection function in operation During pick up LEDs are flashing after tripping this changes to conti...

Page 16: ...ay pickup at the same time after the time delay elapsed Dip switch 3 OFF All output relays will be reset automatically after the fault has been rectified e g when the fault current is interrupted Dip...

Page 17: ...ting value is really wanted to be stored After pressing the ENTER push button again the password will be inquired by means of the message PSW on the display After the password is given correctly which...

Page 18: ...unctions The blocking function of the XRW1 4 relays can be set according to requirement When pressing push buttons ENTER and TRIP at the same time the blocking menue is entered 5 6 Display of software...

Page 19: ...ess of the serial interface df threshold for rate of frequency df dt in Hz s dt measuring repetition for df dt in periods 6 2 Setting procedure In this paragraph the settings for all relay parameters...

Page 20: ...ion or for mains decoupling T should be set in the range from 2 5 At precision measurements e g exact measurement of the system frequency a setting of T in the range from 5 10 is recommended 6 2 4 Thr...

Page 21: ...torage FLSH NOFL If after an activation the existing voltage drops again below the pickup value e g U1 without a trip has been initiated LED U1 signals that an activation has occured by flashing fast...

Page 22: ...test en tered min max values replace the previously stored values Dependent on the adjustment of dt and tripping delay it is possible that the stored min max values are higher than the tripping thresh...

Page 23: ...red trip information i e those LEDs which showed a continuous light when the fault occured are now blinking blinking to indicate that it is not a current fault LEDs which were blinking blinking dur in...

Page 24: ...10 and press the SELECT RESET for app 3 s to reset the LEDs and TRIP message 7 2 Testing the output relays NOTE Prior to commencing this test interrupt the trip circuit to the circuit breaker if tripp...

Page 25: ...ure the operating time Accuracy class 10 ms Switching device Test leads and tools 7 4 2 Example of test circuit For testing of the XRW1 4 relay a three phase voltage source with adjustable voltage and...

Page 26: ...ages until the relay starts i e at the moment when the LED U or U lights up or the voltage alarm output relay contact ter minals 31 34 and 41 44 is activated Read the op erating voltage indicated by t...

Page 27: ...functions The external blocking input is free programmable by the user To test the blocking function apply auxiliary supply voltage to the external blocking input of the relay ter minals C1 C1L or C1...

Page 28: ...can be substantially longer This is because the XRW1 4 relays are equipped with very wide self supervision functions so that many faults in the relay can be detected and signalised during service Im p...

Page 29: ...0 02 Dropout time 60 ms Time lag error class index E 10 ms Minimum operating time U 40 ms f 60 ms df dt 60 ms Influences on voltage measuring Aux voltage in the range 0 8 UH UHN 1 2 no additional infl...

Page 30: ...s Rated frequency fN f 50 Hz f 60 Hz Frequency measuring repeti tion T 2 99 Cycles 1 Frequency element 1 3 f1 f3 tf1 tf3 30 49 99 EXIT 50 01 70 Hz 1 40 59 99 EXIT 60 01 80 Hz 2 tf min 3 50 s EXIT 0 1...

Page 31: ...86 Making current max 20 A 16 ms mechanical life span 30 x 10 6 operating cycles electrical life span 2 x 10 5 operating cycles at 220 V AC 6 A Contact material silver cadmium oxide AgCdO 8 5 Power s...

Page 32: ...EC 255 5 5 kV 1 2 50 s 0 5 J High frequency interference test voltage inputs and outputs between themselves and to the relay frame as per EN 60255 6 IEC 255 6 2 5 kV 1 MHz Electrical discharge ESD tes...

Page 33: ...ange without notice 8 8 Relay case Relay XRW1 4 is designed to be fastened onto a DIN rail acc to DIN EN 50022 the same as all units of the PROFESSIONAL LINE The front plate of the relay is protected...

Page 34: ...0 V yes no Interface adapter RSC2 485 232 1 Interface adapter RS232 and RS485 with galvanical decoupling Important For supplying the interface adapter needed yes no Plug in power supply for interface...

Page 35: ...0 20 tU1 back Reverse run of the 1 st tripping time is active YES U2 Pick up value for the 2 nd overvoltage step V 760 tU2 Tripping time for the 2 nd overvoltage step s 0 20 tU2 back Reverse run of t...

Page 36: ...t 1 Set 2 U1 X X U2 X X U3 X X U4 X X U1 X X U2 X X U3 X X U4 X X f1 X X f2 X X f3 X X df dt X X Setting of dip switches Dip switch 1 PSW 2 3 4 Default setting Actual setting Default setting Actual se...

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