Ordering numbers ......................22 Dimensions and instructions for mounting ..............23 Order information ......................23 The complete manual for the three-phase overcurrent relay SPAJ 131 C includes the following partial manuals: Overcurrent relay SPAJ 131 C, general description 1MRS 750660-MUM EN...
Blocking of high-set and/or low-set overcurrent stages by external control signal Serial port Serial communication Blocking Fig. 1. Protection functions of the overcurrent relay SPAJ 131 C. The encircled numbers refer to the ANSI (=American National Standards Institute) number of the concerned protection function.
≅ SGR/1 3 2 4 t >,k 3I> t >> 3I>> SPAJ 131 C Fig. 2. Connection diagram for the three-phase overcurrent relay SPAJ 131 C. Auxiliary voltage A,B,C,D,E Output relays Self-supervision function Blocking signal Start signal Trip signal Switchgroup for configuring trip and alarm signals...
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Fig.3. Rear view of the overcurrent relay SPAJ 131 C Specification of input and output terminals Contacts Function Phase current I = 5 A) Phase current I = 1 A) Phase current I = 5 A) Phase current I = 1 A)
The trip signal of the I> stage is firmly wired to In addition, the following functions can be Configuration of output relay A and the trip signal of the I>> stage selected with the switches of the SGR switch- output relays is firmly wired to output relay B.
= 1A n = 50Hz 60Hz is being displayed. SPAJ 131 C 3. The red IRF indicator of the self-supervision STEP 80...265V ~ – > system indicates, when lit, that a permanent 18...80V –...
Technical data Energizing inputs Terminals 1-3, 4-6, 7-9 1-2, 4-5, 7-8 Rated current I Thermal withstand capability Carry continuously 20 A Make and carry for 10 s 25 A 100 A Make and carry for 1 s 100 A 500 A Dynamic current withstand capability, half-wave value 250 A...
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Three-phase overcurrent relay module SPCJ 3C3 Low-set stage I> Start current I>, setting range 0.5...2.5 x I Selectable modes of operation - definite time characteristic - operate time t> 0.05...100 s - inverse definite minimum time (IDMT) characteristic - curve sets acc. to IEC 255-4 and BS 142 Normal inverse Very inverse Extremely inverse...
3I> 3I>> Exemple 1 Fig. 4. Overcurrent relay SPAJ 131 C applied for the protection of a distribution substation. In example 1 the low-voltage switchgear is pro- The short circuit protection is based on blockings tected by an overcurrent relay SPAJ 131 C. The between successive protection stages.
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>> 3I>> SPAJ 131 C Fig. 5. Overcurrent relay SPAJ 131 C used to protect an outgoing feeder in industrial switchgear. The switch settings are shown in the table on the next page. The low-set stage of the overcurrent module...
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The selector switches of the phase overcurrent rent is several times greater than the rated cur- relay SPAJ 131 C can be set as follows: rent of the feeder. When employing an extreme Switch SG1/SPCJ 3C3...
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SPAJ 131 C 1) Blocking signal to the overcurrent module of the busbar system Fig. 6. Overcurrent relay SPAJ 131 C protecting an outgoing feeder in a distribution substation. The selector switch settings are shown in the table on the next page.
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The selector switches of the overcurrent relay tion characteristic of operation. The difference SPAJ 131 C can be set as follows: Switch SG1/SPCJ 3C3 SGB/SPCJ 3C3 0 not in use 0 no blocking from feeders t>...
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1) Blocking signals from the overcurrent relays of the outgoing feeders 2) Blocking signal to the high-voltage side overcurrent relay of the power transformer Fig. 7. Overcurrent relay SPAJ 131 C used for protecting the infeeder cubicle and the busbar system. The switch settings are shown on the next page In the example in Fig.
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Trip test function of the relay modules and the The selector switches of the phase overcurrent display. The blocking stage of the module to relay SPAJ 131 C can be set as follows: generate the blocking signal is started via the Switch SG1/SPCJ 3C3...
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The information stored in the registers of the quently stored in register 1. In this case the Recorded data protection relay can be used for analysing fault current value recorded at the previous tripping and fault analysis situations and situations during normal opera- is also stored in auxiliary register 1 and available tion.
Testing, both primary and secondary, should DANGER! Secondary always be performed in accordance with na- Do not open the secondary circuit of a cur- injection testing tional regulations and instructions. rent transformer during testing, if the pri- mary circuit is live. The high voltage pro- duced by an open CT secondary circuit could The protection relay incorporates an IRF func- tion that continuously monitors the internal...
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Fig. 8. Secondary injection test connection for the overcurrent relay SPAJ 131 C. When the test connection has been finished and The correctness of the test connection can be the selector switches properly set, the auxiliary verified by using a multimeter.
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Checking of The matching transformers of the protection measurements can be made at the rated current matching relay are tested separately for each phase. A pure of the relay. It should be noticed that the relay transformers sinusoidal current is fed to the relay. The current shows the measured current as a multiple of the value indicated in the display of the relay should rated current I...
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Testing of The switches of switchgroup SGR should be set The high-set stage is tested in the same way as high-set stage as follows: the low-set stage. The clock measuring the operate time is stopped by contact 68-69 when output relay B operates. Switch Position N.B.
SPTE 3E4 Bus connection module SPA-ZC 17_ or SPA-ZC 21_ Overcurrent relay without test adapter Ordering SPAJ 131 C RS 421 013 -AA, CA, DA, FA numbers Overcurrent relay with test adapter RTXP 18 SPAJ 131 C RS 421 213 -AA, CA, DA, FA...
Raising frame SPA-ZX 111 SPA-ZX 112 SPA-ZX 113 Fig. 9. Dimensions of the overcurrent relay SPAJ 131 C The relay case is made of profile aluminium and along the edge of the cover provides an IP54 finished in beige. degree of protection between the case and the cover.
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The overcurrent relay module SPCJ 3C3 can be with switch SG1/3. At definite time character- Description of used in single-phase, two-phase or three-phase istic the operation time t> can be selected within operation protection relays and it contains two overcur- one of the three available setting ranges of the rent stages, i.e.
Block diagram Fig. 1. Block diagram for the overcurrent relay module SPCJ 3C3. Measured phase currents BS1, BS2, BS3 External blocking signals BTS1 Blocking signal for the tripping of stage I> BTS2 Blocking signal for the tripping of stage I>> Selector switchgroup on the front panel Function selector switchgroup for the operation indicators Blocking signal selector switchgroup on the PC board and...
Front panel > Simplified device symbol >> Self-supervision system Current measurement indicators alarm indicator for phases L1, L2, L3 Display for set and measured values STEP Indicator and start value setting > STEP knop of overcurrent stage I> Display step push-button Indicator and operation time or >...
The setting values are shown by the three indicator below a setting knob shows that the Settings rightmost digits of the display. When lit, the concerned setting value is being displayed. I>/I Set start current of stage I> as a multiple of the rated current I of the energizing input used.
Additional functions required by individual ap- front panel. The numbering of the switches Selector switches plications are selected by means of the selector 1...8, as well as the switch positions 0 and 1 are switches of switchgroup SG1 located on the marked on the front panel.
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Switch Function SG1/7 Selection of the setting range of the operation time t>> of the high-set overcurrent SG1/8 stage I>>. SG1/7 SG1/8 Operation time t>> 0.04...1.00 s 0.4...10.0 s 0.4...10.0 s 4...100 s Switchgroup SG2 is a so called software switch- checksum which is calculated from the table group, which is located in the third submenu of below.
Switchgroup SG3 is a so called software switch- buttons STEP and RESET can be programmed group, which is located in the fourth submenu with switches SG3/1…3. Switches SG3/4…8 of switchgroup SG1. The front panel push- are not in use. The default value for SG3 is 0. SG3/1 SG3/2 SG3/3 Push-button Clear...
The leftmost digit of the display shows the digits the recorded information. The address Recorded address of the register and the three rightmost digit is recognized by its red colour. information Register/ Recorded information STEP Maximum phase current measured as a multiple of the rated current of the protection relay.
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Register/ Recorded information STEP The address code of the protection relay module, required by the serial communication system. If the address code is set at zero the serial communication is out of use. 1) Selection of data transfer rate for the serial communication. Selectable values: 300, 1200, 2400, 4800 or 9600 Bd.
The diagram below shows the available main Main menus and menus and submenus of the overcurrent relay submenus of module SPCJ 3C3. settings and registers MAIN MENU SUBMENU STEP 0.5 s RESET 1 s Normal state, display switched off Current on phase L1 = value that can be set in the setting mode Current on phase L2 Current on phase L3...
The operation of the low-set current stage I> of The slope of the time/current curves is deter- Time/current mined by the values of the constants α and β: the overcurrent module is based on either defi- characteristics nite time or inverse time characteristic. The α...
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Inverse-time characteristics of overcurrent relay module SPCJ 3C3. 0.09 0.08 0.07 0.06 0.05 0.04 0.05 0.03 0.02 6 7 8 9 10 20 I/I> Fig. 3. Extremely inverse characteristic. I = measured current I> = set start current t = operation time k = time multiplier...
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0.09 0.08 0.07 0.06 0.05 0.05 0.04 0.03 0.02 6 7 8 9 10 20 I/I> Fig. 4. Very inverse characteristic. I = measured current I> = set start current t = operation time k = time multiplier...
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0.05 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 7 8 9 10 20 I/I> Fig. 5. Normal inverse characteristic. I = measured current I> = set current t = operation time k = time multiplier...
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0.05 I/I> 7 8 9 Fig. 6. Long-time inverse characteristic. I = measured current I> = set start current t = operation time k = time multiplier...
Technical data Low-set overcurrent stage I> Start current I> 0.5...2.5 x I Start time, typically 70 ms Operate time t> at definite time characteristic 0.05...1.00 s, 0.5...10.0 s or 5...100 s Time/current curves at inverse time characteristic (IDMT) Extremely inverse Very inverse Normal inverse Long-time inverse...
The substation level control data communica- E1...E8 are represented by the numbers 1, 2, Event codes tor is able to read, over the SPA serial bus, the 4...128. The event mask is formed by multiply- event data of the protection module of the relay, ing, one by one, the above numbers either with e.g.
Apart from the event codes the control data and some other data. Further, part of the data Remote transfer communicator is able to read, over the SPA bus, can be altered by commands given over the SPA data all input data (I data) of the relay module, set bus.
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Data Code Data Values direct. Remotely set start value of stage I> 0.5...2.5 x I Remotely set operation time value 0.05...100 s or time multiplier of stage I> 0.05...1.00 Remotely set start value of stage I>> 0.5...20 x I 999 = ∞, infinite Remotely set operation time value 0.04...100 s of stage I>>...
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Data Code Data Values direct. Data communication address of V200 R, W 1...254 the relay module Program version number V205 e.g. 052 B Relay module type designation SPCJ 3C3 Reading of event register Time, channel number and event code Re-reading of event register Time, channel number and event code Reading of relay module state data...
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After an operation the relay module indicates by binary numbers coded to decimal numbers, so means of variable V6 the phases (phase indica- that, for the low-set overcurrent stage as well as tion) which have exceeded the setting value of for the high-set overcurrent stage, each phase is the low-set stage or the high-set stage at the represented by a specific number.
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1MRS 750328-MUM EN General characteristics Issued 96-02-19 of C-type relay modules Version A (replaces 34 SPC 2 EN1) Checked L-W U Approved TK Data subject to change without notice Push-buttons ........................2 Contents Programming switches SG1 .................... 2 Setting knobs ........................3 Display ...........................
Most of the operating values and operating In addition to the settings made with the setting Setting knobs times are set by means of the setting knobs on knobs, most modules allow so called remote the front panel of the relay module. Each setting setting.
Display submenu Less important values and values not very often display moves forward when pressing the STEP set are displayed in the submenus. The number button for one second and backward when of submenus varies with different relay module pressing it for 0.5 seconds. The return to the types.
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Example 1: Function in the setting mode. Manual setting of the address code of a relay module and the data Set the digit by means of the STEP button. transfer rate for the serial communication. The initial value for the address code is 146. Press push-button STEP until register address A appears on the display.
Stored information The parameter values measured at the moment Register A contains the address code of the relay when a fault occurs are recorded in the registers, module as required by the serial communication in some modules also the setting values. The system.
Trip-test mode Register 0 also allows access to the so called The selected starting or tripping is activated by Trip-test function, which allows the output simultaneous pressing of the push-buttons STEP signals of the relay module to be activated one by and RESET.
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Example 2: Trip-test function. Forced activation of the out- puts is made as follows: Press the RESET button for about 1 second until the indicator of the second setting knob starts flashing. Step forward on the display to register 0. Press the push-buttons RESET and STEP si- multaneously to activate tripping of stage 1 (e.g.
A measuring relay module is provided with two The operation indicator starts glowing yellow Operation separate operating stages, each of which with its when the operating stage starts and red when a indicators own yellow/red operation indicator on the lower delayed tripping operates.