R R HT+ 0 00N/ 00V R 0R R K R 0R R9 K GT RSISTORS R - R LT+ 00U MP R 0P R 00N/ R0 R Q R 0K Q VR 0R Q Q R 0R R R Q Q9 R R R K R R R 0R Q Q Q0 R R9 Q R R R R Z V Z V R K 00U/ V 00U V 9 00U/ V R0 / Q R 00N Q R9 VR R 0K Q R9 K R0 Q Q 0 00N 00U Z Z Q Q9 9 Q R0 R Q R 0R R R 0R R 0R R GT RSISTORS R R R - R0 9 0 HOK TURNS R R 00N/ R O/P R 00N/ LT- HT- R R R IGRM SHOWS R000 OUTPUT STG. R000 N R000 OUTPUT STGS IR IN TH NUMR O OUTPUT VIS PR RIL. TH R000 USS VIS PR RIL N TH R000 USS VIS PR RIL. ITIONL OUTPUT VIS R ONIGUR SIMILRLY WITH GT RSISTORS S SHOWN. ON MPLIIRS WITH LT PK (J K0) MOSTS IT 0p >= WORKING ROSS TH GT, RIN O H K0 MOST QUISNT VOLTG JUSTMNT THIS IS MSUR ROSS TH GT RIV T POINTS TO GIV 00mV +/- 0mV HNNL MPLIIR RMIN ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RMIN.S0 rawn y: LM
R HT+ 00N/ 00V R 0R R K R 0R R09 K GT RSISTORS R - R R LT+ 00U/00V MP 00U/00V R 0P 00N/ R0 R00 R Q R0 0K Q VR 0R R 0R Q Q0 R0 R9 Q Q R9 R9 R K R9 R90 R 0R Q Q9 Q R99 R Q R0 R0 R0 R Z V Z0 V R9 K 0 00U/ V 00U V 00U/ V R / Q R9 9 00N Q R VR R9 0K Q R9 K R9 Q Q 0 00N 00U Q0 Z Z9 Q Q9 R0 R Q R9 0R R R0 0R R0 0R R GT RSISTORS R R R - R HOK TURNS R R 00N/ R O/P R 00N/ LT- HT- R R0 R IGRM SHOWS R000 OUTPUT ON MPLIIRS WITH LT PK STG. R000 N R000 (J K0) MOSTS OUTPUT STGS IR IN TH NUMR O OUTPUT VIS PR IT 0p >= WORKING RIL. TH R000 USS VIS ROSS TH GT, RIN O PR RIL N TH R000 USS H K0 MOST VIS PR RIL. ITIONL OUTPUT VIS R ONIGUR SIMILRLY WITH GT RSISTORS S SHOWN. QUISNT VOLTG JUSTMNT THIS IS MSUR ROSS TH GT RIV T POINTS TO GIV 00mV +/- 0mV HNNL MPLIIR RMIN ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RMIN.S0 rawn y: LM
XLR JK R 0P 0K NOT:- OR MPS WITH LT PK MOSTS M09 I IS ITT TO POSITION I R0 HT+ XLR OXSYM LU R SR OXSYM R R 9K R R 9K 0P 0P 0P R 0K I M09 R 00K 00U/V R 00U/V OXSYM R9 00K R 9 R 0P 00K I M09 00U/V R 00K Z V Z V 00U/V 00U/V VOL 0K LIN S NOT:- HT- MP R LU SR 9 0 I M09 OXSYM R 0P XLR XLR OXSYM LU R SR OXSYM R R 0P R R 0 0P 9K 9K 0P R9 0K R 0K I M09 00U/V R0 00K R 00U/V OXSYM OXSYM R LU SR RIG/STRO MO SWITH OXSYM SW OXSYM R R000/ R0, R K/W R000/ R0, R K/W R000/ R0, R K/W SR OXSYM MP JK GRN R GRN R LU SR OXSYM YLL R LT+ SW LR R INPUT P GROUN LINK SWITH VOL 0K LIN INPUT STG IRUITRY RMIN ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RMIN.S0 rawn y: LM
NORMLLY OPN THRML SWITH TRNSORMR SONRY VOLTGS N V R THRM RTHRM 0R/W LK R U/V U/V ( O) - S TRNSORMR WIRING TILS OR ORRT ONNTION TX : GRN QUOT VOLTGS R O LO (RMS) R000 R000 R000 R ORNG YLLOW 0 0 0 GRN LU GRN/YLLOW 0V : R N L I ROWN GRY HSSIS US ORNG RONT PNL MOUNT MINS SWITH S ROWN LK VOLTG US SOTSTRT 00V T R/W 0V T R/W 0V. R/W 0V. R/W US LU SOTSTRT YLLOW UNUS VOLTG TP MINS INPUT VOLTG SLTOR. ONNT RQUIR TRNSORMR VOLTG TP. 0V 0V R TRNSORMR T YLLOW : ORNG : LU RLY RLY () RLY () 9 ON : LT+ US 0N/ 0 R KP0 LT- US 0N/ 9 HT+ - ( O) LT+ 00U/V 9 LT+ US STR 0N/ R000 9, 0,,,,,, 00U/0V R000 9, 0,,,,,, 00U/0V LT- HT- US 0N/ 0 00U/V R KP0 R000 9, 0,, 00U/0V,,, NOT ITT R POWR SUPPLY RMIN ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RMIN.S0 rawn y: LM
R K/W Q R 0K RLY () RLY () RLY 00N/ RLY 00N/ R 0K Q S9 R R0 0R Z V 0 R S NOT MO IN R Q Z 9V R Q R 00K R9 K R0 V 00u 0 R9 k/w RMO 00K Q0 R Q 0 Q Q TO : TO : TO LT+ 9 R9 00K R R 00U/V 9 00U/V R 00K 0N 90 NORMLLY LOS THRML SWITH THRM LT +V H LU LU R K ON LT +V H INTRONNT LXISTRIP TO ISPLY O/P O/P R0 LR K PIN INTRONNT LXISTRIP WY PIN L POWR R L PROTT YLLOW GRN H GRY YLLOW H GRN NOT: R000/ R000/ R000/ R= 0R/W /W /W L RIG GRN R PROTTION STTUS L P RMIN ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RMIN.S0 rawn y: LM
LT +V H H O/P H O/P LT +V H TO ON: 00N R 0K Q R 0K R 0K u Z V L Q SIGNL PRSNT -0d GRN R 0K 00N R 0K R 0K Q u Z V L Q SIGNL PRSNT -0d GRN R Q R9 R 00K R R R K R R Q9 SIG 9 R Q0 I LN Z 9v Z Z v YLLOW L -0d L -d L -d R 00K R R9 K Z V/.W SIG 9 R R I LN Z9 9v Q Z0 v Z v YLLOW L9-0d L0 -d L -d R 00N R9 K Z V/.W Z V L -d L 0d R 00N R0 K Z V L -d L 0d R 00K Z Q Q R 00K Z Q Q R00 R, R K/W R, R K R, R0 00K Z, Z 0V R00 R, R K/W R, R K R, R0 (NOT ITT) Z, Z V R00 R, R K/W R, R K R, R0 (NOT ITT) Z, Z V R ONLY IT ON R00 R 00K 0P 0 U/V R K/W L LIP R R0 ONLY IT ON R00 R 00K 0P 9 U/V R0 K/W L LIP R R00 R, R K/W R, R K R, R0 (NOT ITT Z, Z V R ISPLY R R ISPLY ate: -Jul-999 Sheet of ile: :\PROTL\RNW\NWISP.S0 rawn y: LM
TO ON: 00N R 0K L SIGNL PRSNT -0d GRN 00N R 0K L SIGNL PRSNT -0d GRN LT +V H H O/P H O/P LT +V H R 0K R 0K Q R Q R 0K R 0K Q R Q 0N 0N R 00K R R 00N R K R9 K SIG R I U P0 P P P P L L L L YLLOW -0d -d -d -d R 00K R R 00N R9 K R0 K SIG R I U P0 P P P P L9 L0 L L YLLOW -0d -d -d -d Z 0V/.W L 0d Z 0V/.W L 0d Z Z R 00K Q Q R 00K Q Q 0P 0 U/V R K/W 0P 9 U/V R0 K/W R000 R, R K/W R, R K Z, Z V R 00K L LIP R R 00K L LIP R R000 R, R K/W R, R K Z, Z V R000 R, R K/W R, R K R ISPLY R R ISPLY ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RISP.S0 rawn y: LM
ON R k ON In00 R k R k R k TR 0v n R k IN ON R k n R k R k IN TR 0v R k ON ON ON R-NTRNT PROTT ION P P0/P ate: -Jul-999 Sheet of ile: :\PROTL\RNW\RNTRY.S0 rawn y: L SHM
Protection System The protection system is based around Q0-Q. Under normal conditions Q0 Q will be off. t turn-on 0 will charge through R towards the +LT supply rail. The voltage is fed to the base of Q via. When the voltage across 0 reaches approximately 0V Q will turn on and thus turn on Q. Resistor/diode network R & connected between Q collector and Q base provides positive feedback in order to make the turn-on/turn-off of Q more defined. The collector of Q is connected via R R0 & Q to the coils of relays RLY-. Transistors Q0 and Q are connected in such a way that a voltage of -0mV applied to the emitter of Q0 will turn on Q0 and hence Q. This will rapidly discharge 0 and hence turn off Q and Q thus opening the output relays. Similarly Q is connected such that a base voltage of +0mV will turn it, and hence Q, on with the same resultant opening of the output relays. The output of each channel is fed via resistors R and R into -9 and then via 9 and 0 to Q base and Q0 emitter respectively. The combination of -9 with R and R forms a low-pass filter, and so at signal frequencies -9 will have no voltage across it. In the event of a offset appearing at the output, however, -9 will charge to a voltage, turning on Q & Q or Q0 & Q depending upon the polarity, and hence opening the output relays. The Network consisting of R, R and provide the rapid turn-off feature of the protection system. R is connected through the 90 degree thermal switch to and, which are connected to the secondaries of the mains transformer. The union of and will, therefore, show a full-wave rectified version of the secondary voltage. This is averaged by to a negative voltage, reverse biasing and, therefore, having no effect on the protection system. Should one of the thermal switches open, or the power be turned off, will be rapidly charged towards the +LT rail via R, forward biasing, turning Q on and opening the output relays. If there is no rapid turn off, suspect R (00k) this may be open circuit. It is worth noting that failure of this resistor will render the thermal shutdown useless.