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ASEA BROWN BOVERI
ABB Relays
Features
Three-phase biased differential relay
for the protection of power transformers
and generator-transformer units.
Matching of the power transformer
vector group with DlL switches and the
electronics. No intermediate current
transformers are needed.
The transforming ratio errors of the
C.T.s separately correctable on the HV
and LV side of the power transformer.
Separately adjustable differential
current high-set instantaneous stage.
Differential relay
SPAD 330 C
Stabilized operating principle prevents
spurious function on faults occurring
outside the area of protection.
Blocking function, for prevention of
spurious operations caused by con-
nection inrush currents, based on the
occurrence of the second harmonic.
Local display of measured and set
values on relay front panel.
Continuous self-supervision of the
electronic circuitry and the operation
of the microprocessor.
34 SPAD 4 EN1 C
1992 - 10 - 27
Written
Checked
Approved
1
C
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Summary of Contents for ABB SPAD 330 C
- Page 1 34 SPAD 4 EN1 C Differential relay 1992 - 10 - 27 Written SPAD 330 C ASEA BROWN BOVERI Checked Approved ABB Relays Features Three-phase biased differential relay Stabilized operating principle prevents for the protection of power transformers spurious function on faults occurring and generator-transformer units.
- Page 2 Applications ....................10 Technical data ....................15 Spare parts ....................16 Information required with order ..............17 The complete User’s Manual for the differential relay SPAD 330 C is composed of the following partial documents: General differential relay description 34 SPAD 4 EN 1...
- Page 3 Fig.1. Theoretical characteristic curve of a biased differential relay. The effect of the bias function on the operation Partial range 2 of the relay is graphically illustrated by the characteristic curve presented in Fig. 2. The range between 0.5 x I <...
- Page 4 Curve p/% Fig. 2. Setting range of the characteristic curve of the biased differential relay SPAD 330 C. In power transformer protection the stabilization such a way that the measurement of the of the operation with regard to the restraint...
- Page 5 Connection diagram Fig. 3. Block schematic diagram of the biased differential relay SPAD 330 C. Auxiliary voltage A, E Output relays I RF Self-supervision Differential relay module of L1 phase SPCD 3C21 Differential relay module of L2 phase SPCD 3C22...
- Page 6 34 SPA 12 EN1 “Characteristics of fibre-optic interface module. The terminals of the fibre- cables and instructions for mounting”. Fig. 4. Rear view of the biased differential relay SPAD 330 C.
- Page 7 Intermodular control signals Id> BS IN BS OUT I2f> SPCD3C21 Id> BS IN BS OUT I2f> SPTR5B4 SPCD3C22 Id> BS IN BS OUT I2f> SPCD3C23 Fig. 5. The control signals routed between the functional modules of the differential relay. The second harmonic blocking signal BS OUT generated by any relay phase module also blocks the other phase modules.
- Page 8 The output relay module SPTR 5B4 of the The incoming and outgoing signals of the module biased differential relay SPAD 330 C is located output relay module are firmly related to the together with the power supply module, behind module locations of the relay case. The output...
- Page 9 Power supply To be able to operate the relay needs a constant converter. The primary side of the power supply module supply of auxiliary energy. The power supply module is protected with a fuse, F1, located on module forms the voltages required by the the PC-board of the module.
- Page 10 Applications The biased differential relay SPAD 330 C used former, when the current transformers have for the winding short-circuit and interturn fault “in-side” earthings, i.e. the current transformers Example 1. protection of a YNd11 connected power trans- have the basic connection type I.
- Page 11 Example 2. Biased differential relay SPAD 330 C used for have”inside and outside” earthings, i.e. the the winding short-circuit and interturn fault current transformers have the basic connection protection of a YNd11 connected power type II. transformer, when the current transformers...
- Page 12 Example 3. Biased differential relay SPAD 330 C used for transformer, when the current transformers the winding short-circuit and interturn fault have “outside” earthings, i.e. the current protection of a YNyn0 connected power transformers have the basic connection type I.
- Page 13 Example 4. Biased differential relay SPAD 330 C used for transformer, when the current transformers the winding short-circuit and interturn fault have “inside” earthings, i.e. the current protection of a Dyn11 connected power transformers have the basic connection type I.
- Page 14 Example 5. Biased differential relay SPAD 330 C used for have “inside and outside” earthings, i.e . the the winding short-circuit and interturn fault current transformers have the basic connection protection of a Dyn11 connected power type II. transformer, when the current transformers...
- Page 15 Energizing inputs Technical data Rated current I 1 A/5 A Thermal current withstand - continuously 4 A/20 A - for 1 s 100 A/500 A Dynamic current withstand, half-wave value 250 A/1250 A Input impedance < 100 mΩ/< 20 mΩ Rated frequency f , acc.
- Page 16 Data communication Transmission mode Fibre-optic data bus Data code ASCII Selectable data transfer rates 4800 Bd or 9600 Bd Fibre-optic interfacing module See data sheet 34 SPA 12 EN1 “Technical data and mounting instructions for fibre-optic cables” Test voltages Insulation test voltage, inputs and outputs between themselves and to the relay frame as per IEC 255-5 2 kV, 50 Hz, 1 min.
- Page 17 =60 Hz and U = 18…80 V dc Information Example: required 1. Type designation and title of SPAD 330 C, biased differential relay with order 2. Rated frequency = 50 Hz 3. Ordering number RS 621 001-AA 4. Auxiliary voltage = 110 V dc 5.
- Page 18 ABB Automation...
- Page 19 Stage 1 > Setting knob 2 with indicator 0.05 Programming switches SG1 >> Setting knob 3 with indicator Switchgroup indicator RESET Stage 2 Reset push-button (RESET) Setting knob 4 >> with indicator 0.04 > >> Start/operation indicators SPCJ 3C3 ABB Automation...
- Page 20 The function of the programming switches of example is equal to the checksum indicated on the individual measuring relay modules is speci- the display of the relay module, the switches are fied in the description of the module concerned. properly set. ABB Automation...
- Page 21 STEP STEP button for about one second, the display button and then goes out. moves forward in the display sequence. When pressing it for about 0.5 seconds, the display moves backwards in the display sequence. ABB Automation...
- Page 22 A set value is stored in the memory by pressing and the data transfer rate for the serial commu- the push-buttons STEP and RESET simultane- nication. Further the percentage values for the ously. In practice the RESET button must be remote settings can be changed. ABB Automation...
- Page 23 After storing the data transfer rate for the serial communication you may return to the main Press the RESET button to make the left most menu of register A by pressing the STEP button green digit flash. for about 0.5 second. ABB Automation...
- Page 24 The start value for the address code and the status information for the circuit breaker. The password is 001 and that for the data transfer codes are explained in the descriptions of the rate 9.6 kilobaud. relay modules. ABB Automation...
- Page 25 STEP and RESET are being pressed, the signal module is left in the Trip-test mode, it will TS1 (tripping of stage 1) is activated. Return to return automatically after approx. 5 minutes. the main menu is possible at any stage of the ABB Automation...
- Page 26 It is possible to leave the trip test mode at any step of the sequence scheme by pressing the RESET button for about 10 seconds until the three digits to the right stop flashing. ABB Automation...
- Page 27 IRF indicator on the panel starts glowing soon after the fault was discovered. At the same time the module puts forward a signal to the self- supervision contact of the relay assembly. ABB Automation...
- Page 28 ABB Automation...
- Page 29 34 SPCD 1 EN1 D Differential relay module 1993 - 09 - 07 Written SPCD 3C21, SPCD 3C22, SPCD 3C23 Checked Approved ABB Network Control & Protection Features Biased single phase differential relay Separately adjustable corrections of module the transforming ratios of the high-...
- Page 30 Contents Features ......................1 Description of function ..................2 Signal abbreviations ....................3 Front panel ......................4 Operation indicators ....................4 Measured data ....................4 Settings .......................5 Vector group matching ..................6 Recorded information ..................8 Main menus and submenus of settings and registers .........9 Technical data ....................10 Event codes .......................11 Remote transfer data ..................12 Description of...
- Page 31 modules of the protection unit and a yellow When the bias current I falls below 33 % of the indication I > is lit on the front plate. The differential current I , the setting value of the blocking function may be set to be operative high-set stage is automatically halved because only during switching inrush current situations in a situation like this a fault exists inside the...
- Page 32 Front paneI Device symbol Load current and differential Self-supervision alarm indicator current indicators Display window for set and measured values Setting knob and indicator for the basic setting p Display step push-button Setting knob and indicator for the starting ratio s Switchgroup for vector group, Setting knob and indicator for output relay latching and...
- Page 33 Settings The setting values are displayed with the three Example 1. rightmost digits of the display. The setting Protected object: 110 kV/ 10.5 kV power trans- value presented on the display is indicated by former with the rated power S = 40 MVA.
- Page 34 7 and 8 must be added to the latter checksum. 2) I refers to the basic coupling I of the current transformers, i.e. inside OR outside earthings, c.f. application examples 1 and 3 of the description “Biased differential relay SPAD 330 C, 34 SPAD 4 EN 1”...
- Page 35 7 and 8 must be added to the latter checksum. 2) I refers to the basic coupling I of the current transformers, i.e. inside OR outside earthings, c.f. application example 4 of the description “Biased differential relay SPAD 330 C, 34 SPAD 4 EN 1”...
- Page 36 Recorded The leftmost digit of the display shows the information address of the register and the other three digits the recorded data. Register/ Recorded data STEP Differential current at the moment of tripping, as a multiple of the relay rated current.
- Page 37 Main menus and submenus of settings and registers Display switched off. State always reached after 5 min. time-out. H.V. side load current I1 Differential current Id = Value adjustable in the setting mode L.V. side load current I2 Remote setting Remotely set Basic setting P percentage p1...
- Page 38 Technical data Differential relay module type designations - differential relay module for phase L1 SPCD 3C21 - differential relay module for phase L2 SPCD 3C22 - differential relay module for phase L3 SPCD 3C23 Biased differential stage I > Basic starting value p, setting range 20…50 % of I Starting ratio s, setting range 10...50 %...
- Page 39 Event codes Over the SPA bus the substation control data given in the form of a decimal number. The communicator can read event data, such as event codes E1. . . E4 are represented by the blockings and trippings, from the individual values 1, 2, 4 or 8.
- Page 40 Remote In addition to the event codes, the SPA bus modules of the differential relay. Further, part transfer data allows the substation level control data of the information can be altered by commands communicator to read all the input data given over the SPA bus.
- Page 41 Data Code Data Values direction Current setting of the correction 0.5…1.0 setting I of the current trans- formers of the HV side Current setting of the correction 0.5…1.0 setting I of the current trans- formers of the LV side Potentiometer setting of the 20…50 % I basic setting p Potentiometer setting of the...
- Page 42 Data Code Data Values direction Effectuated remote setting of 10…20 % I the blocking threshold Effectuated remote setting of 20…30 x I the tripping level of the I >>- stage Effectuated remotely set check- 0…255 sum of switchgroup SG1 Recorded data Differential current at the 0…50 x I moment of tripping...
- Page 43 Data Code Data Values direction Storing of the filter calibra- V169 W(P) tion constant (for factory use) Filter calibration percentage V170 Self-supervision fault code V199 0= no fault 1…255 = fault code Communication address of unit V200 1…254 Data transfer rate V201 4800 or 9600 Bd V201...
- Page 44 ABB Automation...
- Page 45 1990 - 10 - 19 maintenance of relays of the Written Checked SPA-300 series Approved ABB Network Control & Protection Fig. 1. A SPA-300 series relay unit with the system panel removed. U1, U2, U3 Measuring relay modules Auxiliary output relay module...
- Page 46 Handling of the Because the relay modules of the relay particular, it is important to protect the separate relay modules assembly, i.e. the measuring modules and the modules against static discharge electricity. power supply and auxiliary relay module, An anti-static plastic bag should always be contain integrated circuits which are sensitive used for transporting and storing detached to static electricity, they should be handled...
- Page 47 Maintenance Due to the lack of wearing components The best results with regard to preventive electronic devices need no preventive measures are obtained by controlling the maintenance. The slow ageing of the ambient temperature and the relative humidity components is not perceivable in practice. in order to keep these within given spec- ifications.
- Page 48 ABB Substation Automation Oy P.O.Box 699 FIN-65101 VAASA Finland Tel. +358 (0)10 22 4000 Fax.+358 (0)10 22 41094 www.abb.com/fi...