.c om SIEMENS Instruction Installation Operation Maintenance ua ls SCOR Overcurrent Protective Relay Function Data ar TIJ .ap F D tM an Hardware 3.11 Software 3.40 I AB C A 1-lll-1 Ll. -1 =I H lP B C G .E lec tri ca E 1 I ww w ,, Manual No. SG-9228-01 ' Time ' . ' ,, : ' " ,t'\ lnst.
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.c om 1 General Information Page 1 Selection of the timing characteristics is made at the front panel or via one of the two communications links. After a characteristic is selected , it is adjusted to specific requirements by choosing the TIME DIAL number. (These are the numbers in a vertical row along the right hand margin of Figures A.1 through A.16.) This TIME DIAL number (Oto 99) selects oneofthe 1 OOcharacteristic curves available for each characteristic.
.c om 1 General Information 2 tM an ua ls Page Shown with Front Cover Assembled lP ar Cradle Assembly ca Figure 1 . Relay Construction 1 .5 The Instantaneous Overcurrent 1 .6 The Ground Time Overcurrent and Function(Option 1 -1 ) Instantaneous Functions .E lec tri One or two instantaneous overcurrent outputs are available, Options 1-1 and 1 -2. Normally one is selected. The instanta neous pickup point is adjustable from 0.50 times to 20 times the time overcurrent pickup point.
.c om 1 General Information Page 3 1 .8 Auxiliary Output Relay (Option 1 -2) ca lP INST 2. This provides a second instantaneous trip contact, which can be set independently of INST 1 , and the contact can be used in a different circuit. This is for application in reclosing schemes to block reclosing for high magnitude faults. It can also be used to block tripping of an interrupting device above its interrupting rating. COMMAND ACTUATED CLOSE.
.c om 1 General Information ua ls Page 4 Style Number Identification Chart for Siemens SCOR Relay I D D [§] SCOR - � [i] D - � D D D � Power Supply = Single-Phase Current G = Three-Phase Current H = X = ® ® E = K N.O. Contacts J TARGET 3 4 NOTES: 2.0 - 11 A for all phases 0.5 - 5.0 A for ground CD 0.5 - 5.0 A for all phases 2.0 - 11 A for ground = 0.5 - 5.0 A for all inputs = 2.
.c om 1 General Information Page 5 For example, if it is decided that three-phase-with-ground monitoring is required for an application, then the first character of the style number is H . ua ls 1 . 1 3 Instantaneous Overcurrent CharacteristicCurves The characteristic curves for the instantaneous relay functions are also presented in Appendix A. Figure A.1 7 shows the curve for the Phase Instantaneous function, and Figure A.18 shows the curve for the Ground Instantaneous function .
.c om 2 Controls and Indicators Page 6 Figure 3 shows the front panel of the SCOR relay with all the ua ls 2.1 General in primary kilo amperes. The Time Target and Element B Target options installed except Option 1-2. All of the front panel are shaded darker, indicatingthatthe relay caused an overcurrent letter. Table 2 supplies a description for each. Data is displayed been reset.
Page 7 ua ls Table 2. Controls and Indicators Locator .c om 2 Controls and Indicators Function A PHASE TAP selector A ten-position switch that provides an incremental adjustmen t of the current pickup tap for all of the phases (simultaneously). The switch positions are defined for both HIGH and LOW range in a table printed on the front panel ( locator 0 of Figure 3). (Intermediate settings between the switch positions may be established by the Tap Cal register.
.c om 2 Controls and Indicators Page S Locator Name ua ls Table 2. Controls and Indicators (continued) Function Provides interconnection for any RS-232 device that is to be used for RS232 PORT (Supplied with the communications reading and/or changing data in the relay registers when the option) communication option is supplied. F TMG indicator, ground An LED that illuminates when the preset ground overcurrent pickup point is exceeded , to indicate that timing is underway.
.c om 2 Controls and Indicators Locator Controls and Indicators (continued) ua ls Table 2. Page 9 Function L POWER indicator Red LED that illuminates when relay power supply is functioning. M TARGET RESET switch Raising this switch simultaneously resets all of the targets (locators N an Name and P) if relay is powered up.
.c om 3 Operation by Front Panel Page 10 3.1 General ua ls Upon release of the MODE switch, the STATUS LED will be lit, and "ConF" will be in view on the FUNCTION/DATA display. (Releasing the MODE switch before 5 seconds has expired returns the unit and display to the DATA mode.) 3.2.3 Stepping Through the Read/Write Registers Starting with the display reading "ConF," you may step through the configuration registers by depressing and releasing the NEXT switch.
Page Register Display Abbreviation 5 6 7 8 9 10 11 12 14 15 Phase Jime qial setting 0000 to 0099 Grou.Qd Jime qial setting 0000 to 0099 Phase tAP calibrate 0000 to 0099 Ground tAP calibrate 17 .E lec 18 19 20 20A 208 20C w 21 22 * 50 9 5 I 9 oul: bF [onF 0000 to 0099 Phase instantaneous #1 00.50 to 020.0 Phase instantaneous #2 00.50 to 020.0 - - - - - - Ground instantaneous #1 -- 00.50 to 020.0 Ground instantaneous #2 00.50 to 020.
.c om 3 Operation by Front Panel Table 4. List of Devices Demand Period Length . . . dPrd Registers 1 4 and 1 6, the phase and ground secondaries, are always 5. Registers 1 7 and 1 8, the Tap Ranges, are pre-programmed based on the style number ordered.
.c om 3 Operation by Front Panel Page 1 3 3.2.12 Selecting the CT Ratios ua ls IMPORTANT NOTE Registers 1 3 through 1 6 provide a multiplier that allows the microprocessor to match the relay's response to the turns ratio of the external CTs. The relative turns ratio of the CTs is expressed as a fraction whose denominator is 5. If the installation is equipped with a Power Monitor unit, the remaining registers can be more easily configured using the Power Monitor unit.
.c om 3 Operation by Front Panel Holding the MODE switch up for five seconds or more when the word "dAtA" is displayed puts the relay into the CONFiguration mode. Leaving the display at "dAtA" for 60 seconds will cause it to scroll again. 3.3.4 Instrumentation Disp!ay ua ls If current is below the 1 0% of TAP level, the row of dashes are along the bottom of the display. If current is above 1 50% ofTAP, the row of dashes are along the top of the display.
.c om 3 Operation by Front Panel 3.4.1 Example Defined This hypothetical example has the following requirements: For Phase For Ground Time over-current pickup: 4.7A 1 .6A Pickup Range: High Low Curve shape: Very Inverse Inverse Time delay setting: 0.38 sec. tap .. Pickup value Tap C (LOW) Tap D (LOW) @ 3.1 6.4� 1. . lP The following style number describes an appropriate relay for this hypothetical application. ca Model: SCORStyle: H1 E Z5 J B1 NOS.
.c om 3 Operation by Front Panel Enter 7 0 into the phase Tap Cal register, and 20 into the ground Tap Cal register. 4. Enter 4.7 into the phase instantaneous #1 overcurrent register, and 4 . 27 into the ground Instantaneous #1 Over current register. 5. Enter 07 into the phase TIME DIAL register, and 05 into the ground TIME DIAL register. ua ls 3. an Load b6 into the phase Curve Type register, and b5 into the ground Curve Type register. ww w .E lec tri ca lP ar tM 2.
.c om 4 Installation and Testing Page 1 7 4.3 Dielectric Test When not shipped as part of switchgear, relay panel, circuit breaker or control, the relay is shipped in a sturdy carton to prevent damage during transit. Immediately upon receipt of a relay, check the style number against the requisition and packing list to see that they agree. Visually inspect the relay for damage that may have occurred during shipment.
.c om 4 Installation and Testing ar tM an ua ls Page 18 lol .......____ Mounting Panel lP L_--------�--�--------�1-L FRONT VIEW Figure 4. Outline Dimensions 1... � 5.69 {144.5) 2 - - --- - --- - - -�(72�) - -------- ca r--o SIDE VIEW - - - - - - - - - --- - - - - - - - 0 I I I I I ! ct nl---+- ct !1 .E lec tri I 8.63 {219.1) ' I I ; . I I 4.13 : (104.8) 4.31 :: (109.5) i i ww w 0 <-- 8.25 (209.6) .__,.
.c om 4 Installation and Testing Page 1 9 ua ls } BE1-51 SCOR ®®®®� @19@17@15@13@11 20 18 16 14 12 Overcurrent SOLID-STATE PROTECTIVE RELAY RELAY DISABLED r--RS-485� PORT 1 1 FOR SENSING INPUT TERMINALS, SEE PRECEDING PAGES COM � COM(+)(-) GND SPECIFIED POWER SUPPLY INPUT } {+ riMED TRIP (OPTION H) INST 1 (OPTION 1-2) INST 2 OR COMMAND CLOSE OR GROUND TRIP tM 9 @@ 5 @ 3 @ 1 @ 10 8 6 4 2 ®)®)®)®)®) } } (·) an C��;��s� (+) ar 7 REAR VIEW OF RELAY SHOWING ACTUAL POSITION OF TERMINALS
.c om 4 Installation and Testing Page 20 All LED and target indicators should be checked in the course of carrying out these test procedures. Reminder: The FUNC TION targets require at least 0.2 A in the output circuit to operate. 2. 3. The tolerances of the test equipment; 2. By using spot tests that check (for example) only one or two multiples of applied TAP current at only one or two TAP positions.
.c om 4 Installation and Testing ua ls Page 2 1 NOTE BUS Several proprietary test sets are marketed which combine the current source and timer, and include other features to simplify setup. I an 51 A 8 Figure Number 1 st Digit of Style Number Sensing Input Configuration K Single-phase G Three-phase H Three-phase-with-ground X Two-phase-with -ground tM With the connecting plugs removed , connect the unit as shown in the following figure numbers: ar 8 A B B c 51 7 i 4. 7.
.c om 4 Installation and Testing 4.7.3 Time Overcurrent Pickup Test (Continued) BUS Verify time overcurrent pickup as follows: After performing the above preliminary steps, connect the input current source to terminals 7 and 8 on the relay case (Phase A). 2. Set the PHASE TAP switch to position A. I 3. Adjust the input current source to 1 1 0% ofthe value shown on the front panel table for TAP A {HIGH or LOW range as indicated by the second digit of the style number) .
.c om 4 Installation and Testing Page 23 ua ls 4.7.4 Timing Test BUS The timing characteristics available by programming the relay are illustrated in Figures A.1 through A.16. Output trip should occur as shown for any given TIME DIAL setting, to within 1 0% or 20 milliseconds (whichever is greater) . Verification of timing accuracy can be limited to low current levels for convenience.
.c om 4 Installation and Testing Page 24 ua ls 4.7.5 Instantaneous Overcurrent Pickup Test NOTE The phase current pickup of the relay will be set at the factory to operate on one of the two available ranges: HIGH or LOW. If ground current is monitored , it will also be set for one ofthe two ranges. Determine which range your relay is set for by the indication of the tap range on the front panel. (One for phase and one for ground.) 8.
.c om 5 Maintenance Page 2 5 5.3 Timekeeping Static devices require no preventive maintenance other than a periodic operational test (see Page 20). If the relay fails to function properly, contact Siemens Customer Service. When returning the relay to the factory, ship the entire relay cradle assembly, preferably in its case. The real-time clock within the relay, once set by the Power Monitor unit after power up, maintains time to a resolution of 0.
.c om 6 References Page 26 2. Siemens Power Monitor™ Display and Monitoring Unit (Manual No. SG-401 8-01 ) . 3. Siemens SCOR Protocol. 4. Siemens Isolated Multi-Drop™ RS-232 to RS-485 Converter(Manual No. SG-6048). 5. Siemens Power Monitor™ PC User 's Guide (Manual No. SG-4028). ua ls EIA Standard: EIA 485. (Also known as the RS-485 Stan dard .) Published by Electronic Industries Association (April 1 983). ww w .E lec tri ca lP ar tM an 1.
.c om Appendix A T ime Overcurrent Characteristic Curves ua ls Figure A.1 through Figure A.16 illustrate the characteristic curves that are programmed into the nonvolatile memory of this relay. Note that a drawing number is given under each caption. Use this number to order a full-size (1 0" x 1 2") Characteristic Curve set. ww w .E lec tri ca lP ar tM The Phase and Ground Instantaneous Time Curves are pre sented in Figures A.1 7 and A.1 8 respectively.
.c om Appendix A Time Overcurrent Characteristic Curves lOO 200 200 100 10 10 10 10 10 10 50 � !- _, """' -t- , � !- .4 ca .5 'l\.\ l\��!'"' !'t'--"""""'"' ' ""' 'l ,\.. " "" ."l. \. �' .. ' 'l\ " "' ' � '� ' ""- .2 """ 1"" """ !'. \�� ... �I'... 1'\\��� .."'\ """ �""" .E lec 1 .01 .01 ""' .07 � 88 ::"� 80 ...... """"" r- 60 50 -...... 40 -..... 30 r-- � 20 tri .I �' � ·""��'r-. lP \ �� ' :"'- .. 7 10 I • 7 • ar 0 I A L ,"' -' •'\.1\. \t\\.. ."' ...
.c om 200 100 10 10 70 100 10 10 70 10 10 an 200 � � 40 40 20 0 I A L 0 I a 7 '" • ' ' \.. "' '' "' a 4 99 80 60 50 40 lP ' ''I' .. 1\. 'I'""' r'\. ' ""'..� 2 ' """'!"- ..� \ 1 I • 7 ' "" I'. ...... !\,. ..... " ..... .. "' . . � 20 .] ""' '" .2 r"'-o ""� � "" � .E lec 1\. I...., � 1' � I .oe .01 • 7 • 5 to- �-- (/) 0 z 0 (_) UJ (/) z UJ � F 01 00 .07 .4 . .02 w � "' "" f"''ii !liiiO: 1 .oe .oe .07 .03 ww � "' "- ,, ..... 99 80 ..... -r-...
.c om Appendix A T ime Overcurrent Characteristic Curves - 200 - 100 ID • " ID ID 10 ID ID \ � l" .\1\.\ \� � \ ���� I " " !'- " " l" r-- 99 !" ""' 80 " ""' t'--o.... 60 "' ""' r-... 50 -� � 40 """" �""" t"--- to... 30 " ' " \ 1\\ � ,\' ·' " \�\' �l\ ...... to... I' " I' ,, " \" .I .7 ' 'l'l\ .I -� .. 1\,. I' ,...., - 20 ""' ""' -- tri .3 ca ���!\ \ I .I 1\ � ,.. � ....,... . . l"o .E lec 2 �� 1 .oi 10 I I 7 • � -' � - ""'" rr---� r--.� .. .Ill ·.
.c om \i �\ \ � 100 ., ., 111 100 10 ID 111 " " , \\ 40 � \ 30 20 , \ 50 "' �' ,\,1\" .\ �� � �'\�' .'\ 20 ���� ,,, \ ,, I �n ·' '-' :\ � ' \'� ;'\'\ \' �� �� \.\ '\\\ � 1 .. .7 E �· �� ''\� � '\!"\� �,..... 99 � \�'�" �........ .. ... 80 ,,, [ �� ,, ' 1\- 1\ . . .. 'II: � �� 60 50 40 ...... '- ....... 30 "' 20 "' ....... tri .. I'.. 0 I A L ca ' .I ... � � '\ ' \ \\1\ \ � ' \� \ (f) 0 z 0 (_) w (f) � w � F I .3 " .2 � lec r\ "� 1'1""" .1 01 .
.c om Appendix A T ime Overcurrent Characteristic Curves ua ls JOO - .... ... � - 1: ... 100 10 10 '' ,, 10 50 10 50 .... ' 1'- · ' �' \.1\. � ,, ' N� ' � .... 10 • I 7 .... ' ·'- I .... \ ,, �' \ � \\� M " ' E ,\.� ' ,, ' ,, ' ,. �' .. .7 .. \ ,, \ �� i\.I\ I\ .� .4 I ,, \.\. � A L �"� �� 99 _1 � 80 ' ' ,,, ' ·'� 60 \. \\.' 50 40 ' ' 30 "' ' ll' ' 20 [\_\.'\. ca \ �� � ' tri \. .J ' 1\ 1\ .E lec .2 , .CII .jll .07 .CII .00 , �� :\.
.c om Appendix A T ime Overcurrent Characteristic Curves ua ls - 100 10 10 10 ..... ·� so � an 70 40 '-L' 'r\ �� r\� 1\� - 1""--o 10 I • 1 1'- - .,1, \.� • • � ��� [' T I l' M E l\. '' ' ..... l\.I\.I\ ...... ,1\: ' �� 0 (_) LU U) � LU � i= ....... ��� � .• .1 I �� �'' � � �'" \ �� �� ' � I\. .. . 0 A L gg eo �' "" '"' '"� 80 \. \\: 50 ' 40 ' l'' ' 30 1'\.\.. 20 � \.. 1\ ca 1 .I �' l"- ' lP � z . .. tri 1\. .J I' I' .E lec .2 tM -...... 1\. l� 1 .
.c om - - - - 11 1011 • • 'Ill • 'Ill • • • an • 40 • �� 1\� .. � E ,,�, J 1\. 1\� � I' I D I l' 1n A L lP l\1' L\'"' 1\ 1\ �\'1\ �l\ � "� 1 �� " 80 eo � I\� 50 _, 40 ' ,, 30 ·' ' ' 1'\.'\.' 20 ' � [ ' ' l'' ' " ca .I " .I .7 .. l' " -� 4 1\. tri .3 J 0 u UJ (/) z UJ lec .ai I .01 .07 .01 .01 '� :" � .E 04 �� -�� & � t= w ww 1\ 1� " l 4 � I 7 I 110 I 1n A L L\\\ �� �� .I ·' .I .4 .3 " 10 eo '\. 1\'\.: 50 40 ' ' 30 ·'' � 1\.'\.
.c om Appendix A T ime Overcurrent Characteristic Curves - 100 10 10 7V 100 10 10 7V 10 10 so so an - 40 40 30 1'\ 1\ 20 �� I I 7 T I I {" I\ ' ' "" � \' \ ' �' I A �\\ L ,� �\"' � �� gg 80 ' ' •'' '- '-\.: e0 \. '' 50 ' ' 40 ·','\." � 30 1\.\.' 20 �\.'t\ �'� 1 0 ca 1 ,'\. .\.\. lP l .I .. .? .. � \ -� .4 0 (_) UJ (f) � UJ � F ' 1\ .E lec .2 .1 .. .CII I' �� 07 . 'I"''I.: i"o.. .CII .01 .04 .Ol w • . . 7 1 . .
.c om Appendix A T ime Overcurrent Characteristic Curves ua ls SCOR INSTANTANEOUS TIME CURVE GROUND TIMINGS SCOR INSTANTANEOUS TIME CURVE PHASE TIMINGS 70 50 \ \ � z \ 8 w (/) 3 � \ 1'. H-+++-H""+++-H-+++-H-+-H 30 1-t-+-+-+--t-+-+-+-+--t-+-+--t-1 �_L_L��_L_L��_L-L��_L� 18 20 2 4 6 8 10 12 14 16 1'- l 51 " SCOR D992-oo7 1 -22-92 tM 0 w :::;; >= an \ 60 � 40 sw Page 36 I" .... :1:: 50 sw 0 w :::;; >= ar MULTIPLE OF TAP ww w .E lec tri ca lP Figure A.
.c om Appendix B Functional Description of Operation Page 37 8.2 Current Sensing The solid state power supply is a low burden, flyback switching design which delivers a nominal +5 and +1-1 2 Vdc to the relay's internal circuits; also an isolated +5 Vdc for the communications circuits. The input terminals of the power supply are not polarity sensitive. A red POWER LED illuminates to indicate that the power supply is functioning.
.c om Appendix B Functional Description of Operation Page 38 The current inputs are continuously polled and the calculations updated once for every 60 Hz (line) cycle. As long as the sensed current is above the pickup point, the elapsed time is accumu lated toward trip. However, once the sensed current falls below pickup, the relay is reset and all accumulated time is cancelled. 8.5.
.c om Appendix 8 Functional Description of Operation (assuming that the Communications Option is also present) . The programming information is supplied in the Siemens Power Monitor™ Display and Monitoring Unit (Manual SG-401 8-01 ) . (The second output relay, when controlled by the computer, cannot simultaneously serve as an instantaneous output .) ua ls Registers;one register for the phases, one for ground. All current sensing and pickup data is weighted by the computer accord ingly. 8.5.
.c om Appendix B Functional D escription of Operation Use of this port is restricted to Siemens field service and factory personnel, and connection to this port automatically disables remote RS-485 communications. 8.8.2 Local or Remote with Siemens Power Monitor™ Unit Configuration of the SCOR relay is read and stored by the Power Monitor unit, and the relay can be configured or changed remotely from the Power Monitor unit (except for the tap switches which must be set manually on the front panel).
.c om Appendix C Specifications The SCOR relay is available in single-phase, three-phase, two phase-with-ground, and three-phase-with-ground configura tions, and with the features and c a p a b ilities descri b e d in Table C.1 . Specifications an Table C.1 ua ls Page 4 1 The unit is designed to operate from the secondary of a standard current transformer Current Sensing Inputs rated at 5 A. The maximum continuous current rating for each input is five times tap or 20 A, whichever is less.
.c om Appendix C Specifications ua ls Page 42 Table C.1 Specifications (continued) Overcurrent Timing Characteristics The relay incorporates all of the time overcurrent characteristics shown in Figures A.1 through A.1 6 in Appendix A. Selection of a specific timing characteristic is accomplished by programmed instructions. Separate selections can be made for phase current and for ground current. Time Dial : Refer to Figures A.1 through A.
.c om Appendix C Specifications ua ls Page 43 Table C.1 Specifications (continued) Outputs Output contacts are rated as follows: Resistive: an 1 20/240 Vac - Make 30 A for 0.2 seconds, carry 7 A continuously, break 7 A. 250 Vdc - Make and carry 30 A for 0.2 seconds, carry 7 A continuously, break 0.3 A. tM 500 Vdc - Make and carry 1 5A for 0.2 seconds, carry 7 A continuously, break 0.1 A. Inductive: 1 20/240 Vac, 1 25/250 Vdc - Break 0.3 A (UR = 0.04).
.c om Appendix C Specifications Page 44 Input Voltage Range Burden at Nominal (Maximum) K 48 Vdc 24 to 60 Vdc ?.O W J 1 25 Vdc 1 20 Vac 62 to 1 50 Vdc 90 to 1 32 Vac 8.0 W 1 9.0 VA an Nominal Input Voltage tM Type ua ls Table C.2 Power Supplies Table C.3 Current Sensing Burden, R and L (R in milliohms, L in microhenries) 1 x TAP A LOW 1 2.37 (2.46) 2 x TAP 5 x TAP 1 1 .66 (2.33) 1 1 . 1 7 (2.22) 1 1 .29 (2 .25) 1 0.97 (2. 1 8 1 1 .1 0 (2 .20) 1 0.71 (5.41 ) ar RANGE 1 1 .
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SI E M E N S .c om Siemens E nergy & Automation , Inc. E lectrical Apparatus Division ww w .E lec tri ca lP ar tM an ua ls P . O . Box 29503 Raleigh, NC 27626 (91 9) 365-6660 SG-9228-01 8/92 2M PR INTED IN U.S.A.
