Emco EE301-T Manual Download Page 24

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C O N T E N S

Sr. No.

TITLE

PAGE No.

INTRODUCTION

GENERAL DESCRIPTION

III

SPECIFICATIONS

FAMILIARIZATION WITH INDICATIONS / CONTROLS

OPERATION INSTRUCTIONS

FUNCTIONAL DESCRIPTION OF VARIOUS MODULES

VII

FAULT FINDING PROCEDURE

VIII

OPTION

LIST OF DRAWING & RECOMMENDED SPARES

WARRANTY

FAULT REPORT FORM

Summary of Contents for EE301-T

Page 1: ...Type EE301 T is designed for maximum operational simplicity It regulates the secondary voltage of power transformers with on load tapchangers The bandwidth control allows the dead band to be set in t...

Page 2: ...ing at 132V Restoration at 127V Control Relays One pair of normally open potential free contacts of rating 5A at 240V AC or 24V DC resistive load for each Lower Raise Control Fail Undervoltage Overvol...

Page 3: ...ergised 8 CF Lamp ON when Control Fail Relay is energised i e when the PT voltage remains outside the bandwidth for more than 15 minutes 9 TEST Lamp ON when AVR is in TEST mode B CONTROLS 1 Power ON T...

Page 4: ...age gets connected to the instrument This switch must be kept in Normal mode when the instrument is in use 7 Test Voltage Control Simulates PT I P in Test mode and can be varied from 0V to 150V AC 8 T...

Page 5: ...OLTS OPERATION CHECK Increase the PT Supply above 112V atleast 112 5V but ensure that it is below OV limit 132V L lamp should immediately turn on The LR control pulse will come only after 30 secs from...

Page 6: ...east 132 5V UV OV lamp will turn on immediatelly Under this condition L lamp will also be on but the Lower control is inhibited Note that between Blocking Release Restoration a hysteresis of 5V has be...

Page 7: ...rom 1 to maximum tap and check whether TPI reads correctly Keep the TPI Test Normal switch in Test mode check whether display reads 88 FUSE REPLACEMENT 1 After switching power on the display indicatio...

Page 8: ...appropriate relay The NO contacts are brought out on the Rear Panel Terminal Block In case of UV OV condition the relays are blocked and no control pulses are available The IC8 is used to convert the...

Page 9: ...ntrol to 108V Set selector switch to L set position and vary L set control to read 110 5V to 115 5V on display Set L set control to 112V Ifany of the settings are not obtainable it means Display PCB i...

Page 10: ...n IC4 on Main PCB is faulty In above description it is assumed that display LEDs are OK Step 11 To check relay vary PT I P to get L R conditions in Normal mode confirm that Lower relay and Raise relay...

Page 11: ...TP3 5V 0 25V On Display PCB Bet TP4 on Display PCB TP7 on Main PCB For PT I P 110VA C 3 3VAC 0 2 Bet TP1 on Display PCB TP7 on Main PCB For PT input 110V A C 7 5VDC 0 2 Varies with PT input DC O P Bet...

Page 12: ...Replace after varying P T input beyond dead Display PCB band settings Or L or R indication remains permanently ON LR or RR not coming after varying Digital circuitary on Main PCB faulty PT I P voltag...

Page 13: ...ty is selected by polarity switches The net compensation is then summed with the stepped down PT voltage II SPECIFICATION Resistive Reactive 0 20 of the regulating value continuously adjustable Compen...

Page 14: ...e VX raises the voltage VX Lowers the Voltage The PT I P to the AVR is internally stepped down to 3 3V corresponding to 110V The vector sum of resistive reactive drops i e LDC 0 P is added vectorially...

Page 15: ...se of its small effect on AVR VERY IMPORTANT 1 Switch off CT current or short CT before disconnecting AVR 2 When LDC is not to be used then both X and R dials should be kept at 0 This position will gi...

Page 16: ...proportional to Taps 1 to 17 which can be used for SCADA TESTING PROCEDURE Check TPI for taps 1 to 17 measure O P current varies from 4 to 20mA 1mA tap i e tap1 4mA tap2 5mA so on till tap17 20mA In...

Page 17: ...S 1 Block Diagram 05 ED 09 2 Front Panel View 05 MD 19 3 Rear Panel View with Cutout Dimensions AVR connections 05 MD 20 RECOMMENDED SPARES 1 Main PCB 2 Display PCB 3 TPI PCB 4 Mains Transformer 5 Sen...

Page 18: ......

Page 19: ...06 DRG No 05 MD 19 ISS 2 4 3 2 1 ISS DATE APPR BY DRN BY J J P MATERIAL ASSEMBLY PRODUCT AVR 301 T DATE 9 4 03 SCALE N T S EMCO ELECTRONICS DOC No DC00 405 ISS 1 ON VAC UV OV R RR L LR CF NSET RSET LS...

Page 20: ......

Page 21: ...case exceeds the original purchase price of the equipment For warranty service or repair the equipment must be returned to EMCO ELECTRONICS securely packed on Freight paid basis and accompanied by a...

Page 22: ...s when Display rdg R SET 3 RR LED pulses after TD 4 L LED glows when Display rdg L SET 5 LR LED pulses after TD 6 UV glows for UV condition 7 OV glows for OV condition 8 CF glows for CF condition 9 AL...

Page 23: ...t Thane 401208 Tel 0250 2481783 1804 Fax 0250 2481087 Email mumbai emcoelectronics org Office 302 Vasan Udyog Bhavan Sanapati Bapapat marg OPP Phoenix mill BIG BAZAAR Lower Parel W Mumbai 400 013 Tel...

Page 24: ...ION 1 III SPECIFICATIONS 2 IV FAMILIARIZATIONWITH INDICATIONS CONTROLS 3 V OPERATIONINSTRUCTIONS 5 VI FUNCTIONAL DESCRIPTION OFVARIOUS MODULES 8 VII FAULT FINDING PROCEDURE 9 VIII OPTION 13 I X LIST O...

Page 25: ...ISO 9002 COMPANY Automatic Voltage Regulating Relay EE 301 T INSTRUCTION MANUAL...

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