ABB KLF Series Instruction Leaflet Download | Manualshive

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Courtesy of NationalSwitchgear.com

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Summary of Contents for KLF Series

Page 1: ...nits sounds an alarm warning the operator of a low excitation condition and the additional operation of the third sets up the trip circuit The relay can be applied without modification to all types of synchronous ma chines such as turbo generators water wheel generators or synchronous condensers The KLF relay is designed for use with 3 phase 3 wire voltage supply and may use wye or delta connected...

Page 2: ...I L 41 748N Rear View Fig 1 Type KLF Relay 2 Courtesy of NationalSwitchgear com ...

Page 3: ...lement assembly and a molded bridge The frame serves as a mounting structure for the magnetic core The magnetic core which houses the lower pin bearing is secured to the frame by a locking nut The bearing can be replaced if necessary without having to remove the magnetic core from the frame The auto transformer makes it possible to ex pand the basic ranges of the long and the short g reach compens...

Page 4: ...ct action A casual inspection of the assembly might lead one to think that the contact arm bracket does not clamp on the hub as tightly as it should However this adjustment is accurately made at the factory and is locked in place with a lock nut and should not be changed Optimum contact ac tion is obtained when a force of 4 to 10 grams pressure applied to the face of the moving contact will make t...

Page 5: ... is positive holding the upper pin bearing the bridge is used for mounting the adjustable stationary contact housing The stationary contact housing is held in position by a spring type clamp The spring ad juster is located on the underside of the bridge and is attached to the moving contact arm by a spiral spring The spring adjuster is also held in place by a spring type clamp UNDERVOLTAGE UNIT Th...

Page 6: ...ses its contacts for lagging var flow into the machine Its zero torque line has been set at 13 from the R axis Its primary function is to prevent operation of the relay during external faults The impedance unit closes its contacts when as a result of reduction in excitation the impedance of the machine as viewed from its terminals is less than a predetermined value The operation of both the impeda...

Page 7: ...VpQL is reversed by the ZQ compensa tion In this case the Z compensation has no effect on the balance point This explains why the reach point is fixed independently by ZQ The voltage Vjy is equal to VIT V12 0 5 V23 1 5 V1N 1 As shown in Fig 4 one half of V23 voltage is physically derived in the relay at midtap of a re actor connected across voltage V23 Reach of the distance unit is determined by c...

Page 8: ... has been set by the spring tension to be approximately 1 volt and 5 amperes at maximum torque angle 31 26 2 14 4 13 8 39 34 3 13 9 13 0 Phase BC VA Angle of Lag 60 Hz 50 Hz SA SC 60 Hz 50 Hz 12 10 1 2 6 2 6 38 33 2 5 9 5 5 42 37 3 6 6 6 1 UNDERVOLTAGE UNIT The undervoltage unit is designed to close its contacts when the voltage is lower than the set value The undervoltage unit is energized with V...

Page 9: ... partial LOF 3 Provide alarm features for manual operation 1 Same as 1 2 and 3 at left 2 Provides back up protection TABLE II SPECIAL SETTINGS FOR MULTI MACHINES BUSSED AT MACHINE TERMINALS ZONE 1 ALONE ZONE 2 ALONE BOTH ZONE 1 ZONE 2 See Fig 10 IMPEDANCE SETTING See Fig 11 See Figs 10 11 VOLTAGESETTING a Contact shorted or b set at 87 for security 87 Zone l voltage contact shorted with Zone 2 set...

Page 10: ...LCULATIONS DISTANCE UNIT Set the distance unit to operate before the steady state stability limit is exceeded Also to allow maximum output without an alarm set the distance unit to allow the machine to operate at maximum hydrogen pressure and 0 95 per unit voltage lowest voltage for which the capability curve machine cannot be realized without ex ceeding the steady state stability limit set the di...

Page 11: ... upper 06 The relay setting is now TASA 15 8 x 2 _ 31 6 1 M 1 0 15 1 15 27 6 Actual ZA 27 5 TS This is 99 7 of the desired setting To set ZQ 3 29 ohms Step 1 The lowest tap S for 6SQ greater than 3 29 is Sc 1 Set Sc 1 Step 2 Tc nearest to 3 29 3 29 is 3 64 M 1 Z If the sign is negative then the M taps are con nected with the R lead above the L lead to raise the setting SAMPLE CALCULATIONS Assume t...

Page 12: ...as turbine units with high generator impedance the undervoltage unit may not operate For these applications the under voltage contacts should be short circuited C The desired undervoltage unit setting is com puted by Setting Vjy 1 5 Vjjq where Vjjq is phase to neutral voltage Note An electrical check of this particular setting is outlined in this instruction leaflet under the heading Acceptance Ch...

Page 13: ... time of 4 second this gives an overall time of 1 0 second If the voltage is maintained then the alarm circuit should start a last ditch timer This timer may be set anywhere from 10 seconds to one minute depending on machine type and user preference Compensator T requires an additional set ting for including or excluding the origin of R X diagram from the distance unit characteristic If the desire...

Page 14: ... flush mounting or by means of the rear mounting stud or studs for projection mounting Either a mount ing stud or the mounting screws may be utilized for grounding the relay The electrical connections may be made directly to the terminals by means of screws for steel panel mounting or the terminal studs furnished with the relay for thick panel mounting The terminal studs may be easily removed or i...

Page 15: ...each other with in 1 volt V1N 80 1 x 1 5 2 25 4 Adjust phase shifter for 90 current leading the voltage 5 With the terminal voltage at 80 volts in crease current until contacts just close This current should be within 3 of 19 0 amps 19 6 18 4 amps This value corresponds 1 5ZC setting for the same reason as ex plained above ZA 23 7 ohms Il E Telephone Relay Apply rated dc volts across terminal 10 a...

Page 16: ...se Note de grees Continue to turn the phase shifter until contact closes again Note degrees The maximum torque angle should be 3 computed as follows Degrees to Close Contacts at Left Degrees to Close Contacts at Right B Distance Unit Middle Unit Calibration Make following tap plate settings TA 15 8 Tc 5 1 SA SC 1 Make MA Me 15 settings L lead should be connected to the O in sert R lead should be c...

Page 17: ...ake the necessary gap adjust ments With moving contact in the opened position i e against right stop on bridge screw in stationary contact until both contacts just make Then screw the stationary contact away from the moving contact 3 4 of one turn for a contact gap of 022 2 Sensitivity Adjustment With reactor X having its core screwed out by about 1 8 inch apply 1 00 volt to ter minals 6 and 7 Obs...

Page 18: ...n unit is energized with 71 or more volts b Relay is shipped with 80 volts setting This is accomplished by lowering resist ance value until contacts make at 80 volts and open when unit is energized with 81 or more volts The spring should not be used for this setting F Indicating Contactor Switch ICS Close the main relay contacts and pass suffi cient dc current through the trip circuit to close the...

Page 19: ... X D 0 I 1 V rv i x ALARM 1 TD 2 TD A TD A Z TD 2 I I 10 TRIP TRIP 0 75 SEC 1 MIN SEC NEG DC v TD I Sub 1 3491A03 Fig 9 Generalized External Schematic x R XD 2 XD X Sub 1 3491A03 Fig 10 Zone 1 Impedance Characteristic 19 Courtesy of NationalSwitchgear com ...

Page 20: ...Y CURVE MAX H2 PRESSURE MEL X Sub 1 3491A03 Fig 11 Zone 2 impedance Characteristic X NOTE FOR 50 HZ RELAY ALL FREQUENCY VALUES SHOULD BE MULTIPLIED BY A FACTOR OF 0 8555 HERTZ R HERTZ HERTZ HERTZ Sub 2 3491A08 Fig 12 KLF Frequency Response for Impedance Unit 20 Courtesy of NationalSwitchgear com ...

Page 21: ...N 2 FOR Z ANO V UNIT TESTS POS lf POS 2 Tt o o O VARIABLE AUTO TRANSFORMER rr rCl PHASE ANGLE METER PHASE SHIFTER 4 5 AMP LOAD hLOAD RESET SWITCH P P N A 3 PHASE 120 VOLTS e c Sub 5 290B580 Fig 13 Diagram of Test Connections for KLF Relay 21 Courtesy of NationalSwitchgear com ...

Page 22: ...146 05 DIA 2 HOLES _ 5 375 136 53 1 i f OI6 397 250 n 6 35 0 W 03l i l 03l I 03I t I 03I H 26 I9 26 I9 26 I9 26 I9 I 375 190 32 SCREW 5 750 SPACERS FOR 146 05 THIN PANELS 9 53 PANEL CASE I 5 16 18 SCREW q FOR THICK PANELS S 09 USE 5 16 18 STUDS r INTERNAL EXTERNAL TOOTHED WASHERS 190 32 SCREW FOR THICK PANELS USE 190 32 STUDS n A i o A 25 4 9 3 5 W7 I 1 813 i 2 0 I 46 05 i 50 8 2 10V 8 6 4 V L TER...

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