ABB SGR-51 Manual Download | Manualshive

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Courtesy of NationalSwitchgear.com

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Summary of Contents for SGR-51

Page 1: ...internal schematic in Figure 3 o Lockout Indicator Circuit The lockout indicator circuit is controlled by the state of the flip flop control circuit Consisting of amplifier transistors Q10 and Qll the amber light is lit when the flip flop is in the set state and the relay is locked out if the breaker is open at this time Timing Circuit The timing circuit is a uni junction relaxation oscil lator co...

Page 2: ...I L 41 668 IE Fig 1 Type SGR 51 Reclosing Relay Front View Fig 2 Type SGR 51 Reclosing Relay Rear View 2 Courtesy of NationalSwitchgear com ...

Page 3: ...ly reclose the breaker 55 milliamperes at rated voltage SETTINGS Reset Time Setting The reclosing of the breaker reopens the 52b contact switching transistors Q1 and Q6 on Cap acitor C5 then discharges through Q6 to give a re sultant voltage drop across R19 which causes the voltage on the emitter of Q5 to rise above its base voltage This causes flip flop transistor Q5 to turn off setting the flip ...

Page 4: ...econds Apply rated voltage to the relay to test the circuit board Reclose relay B by pushing PB 1 After 3 or more seconds push and hold PB 2 Relay B should trip open reclose trip open and remain locked out Apply voltage before each testpoint otfeck and interrupt it after each check Take testpoint read ings before and after the reset time shown on the time dial Calibration Check The following proce...

Page 5: ...e Rise to Approx 15 Volts Approx 1 V Approx 1 4 V Junction of RIO and C2 Timing Circuit C4 Q4 Q5 Approx 15 V Junction of R14 and R18 Junction of R16 and R21 Junction of R26 and D6 Junction of Q9 and D7 Flip Flop Control Circuit Approx Approx 15 V 1 V Approx Close Relay Circuit Approx Q7 8 V 0 V Q8 Q9 D7 Approx 20 V Approx 0 V All measurements made between indicated points and d c negative 5 Courte...

Page 6: ...81 184A763H51 184A763H58 184A763H34 11D951JH10 2 C22 R07 5 C23 R08 5 C24 1 2W R09 5 1 2W RIO 1 TRANSISTOR 1 2W Rll 5 1 2W R12 5 Q01 2N3417 Q02 2N3417 Q03 SIM to 2N2647 Q04 2N3417 Q05 2N3417 Q06 2N3645 Q07 2N3417 Q08 2N3417 Q09 2N3645 Q10 2N3417 2N3417 848A851H02 848A851H02 629A43 H05 848A851H02 848A851H02 849A441H01 848A851H02 848A851H02 849A441H01 848A851H02 848A851H02 1 2W R13 5 1 2W R14 5 1 2W ...

Page 7: ...A Q 5 i rO IM r Q L TO L 13 l o TO r CM CM O U NJ cr o J O T i 4 J CVI O T CM 1 TO V D5 CSJ r T T c CE cc 4 CE Jf07 J D C R AI K02 rQ E cr E HR m 1 4 i CM CM A1 C22 o T i CM IS CE 1 CE V T TT i i 9 NEC L l RESET 2QIC4I9G01 rQ5 l DENOTES NORMALLY CONDUCTING TRANSISTOR C 0 o r c _ c c PRINTED CKT CONNECTION NOTE SCHEMATIC SHOWN ENERGIZED AND IN RESET CONDITION FRCNT VIEW FT CASE CONNECTIONS O Fig 3 ...

Page 8: ...Courtesy of NationalSwitchgear com ...

Page 9: ...SYNCHRONIZING SWITCH LOGIC STATE AND CONTACTS SHOWN WITH BREAKER CLOSED 52b OPEN AND SGR 5I RESET 876A231 Fig 4 Externa Schematic of Type SGR 51 Relay TEST CIRCUIT FOR TYPE SGR 51 RELAY ED B w MG 6 RELAY OR EQUIVALENT 0 A OPERATE COIL RESET COIL RI 500nr25W 025 VDC 50A 25 W 48VDC a s TIMER STOP l CAL C 2OMF0 150 V 0 1 NOTE TIMER TO START AND STOP ON MAKE OF CONTACTS OPER Bb B Rl 0 B COIL INTERRUPT...

Page 10: ...ro P0 o g no oi ID CJi ro 04 o 04 ro TTT T N r J t Hj reai r TTT 9 Y YT Sub 5 691B442 OFig 6 Component Layout of SGR 51 Reset Board i ro ro in ro M ro GC C ro ro r cc EC 4 I 862A741 Fig 7 Component Layout SGR 51 Indicator Board 10 Courtesy of NationalSwitchgear com ...

Page 11: ...HED WASHERS 190 32 SCREW SPACER OR SPACERS FOR THIN PANELS t 1 875 4763 2 688 68 28 u 563 j 14 30 DIA 2 HOLES 5 375 136 53 1 _ 250 6 35 M 03I I 03I 26 19 26 19 0I6 397 250 n 6 35 0 1 031 t 1 031 H 26 19 26 19 1 a 375 9 53 V PANEL 5 16 18 SCREW FOR THICK PANELS I50Q USE 5 16 18 STUDS r t 4 1 0 1 25 4 r t 9 5 7 3 INTERNAL EXTERNAL TOOTHED WASHERS SI3 46 05 I 1 1 2 0 50 8 190 32 SCREW FOR THICK PANEL...

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