MESSR

DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD

SHIP NO. H4102-6

440V & EMERGENCY SWITCHBOARD & STARTERS

CONTENTS

PART 1 : INTRODUCTION OF SWITCHBOARD

PART 2 : AIR CIRCUIT BREAKER

PART 3 : MOLDED CASE CIRCUIT BREAKER

PART 4 : INSULATION RESISTANCE MONITOR (SBAG-202)

PART 5 : GROUP ANNUNCIATOR SYSTEM (SBGA TYPE)

PART 6 : INTRODUCTION OF STARTERS

PART 7 : MOTOR AUTOMATIC CONTROL SYSTEM (HEEM-2)

PART 8 : REPLACEMENT OF FDC CONNECTION MCCB WITH SPARE

PART 9 : MAGNETIC CONTACTOR, THERMAL OCRY, CONTROL RELAYS

PART 1

CHAPTER 1. GENERAL

1. INTRODUCTION

2. GENERATORS

3. RULES AND REGULATIONS

4. CONSTRUCTION

5. AIR CIRCUIT BREAKERS

6. MOLDED CASE CIRCUIT BREAKERS

CHAPTER 2. STARTING AND STOPPING OF ENGINE GENERATOR SETS

1. SUMMARY

2. MANUAL START-STOP CONTROL OF DIESEL ENGINES

2-1. CONTROL FROM MAIN SWITCHBOARD

3. MANUAL GENERATOR CONTROL PROCEDURE FOR MAIN SWITCHBOARD

3-1. INITIAL CHECK-OUT

3-2. PLACING A GENERATOR ONTO A DEAD BUS

3-3. PLACING A GENERATOR ONTO A LIVE BUS (GENERATOR PARALLELING)

3-4. STOPPING A GENERATOR

4. EMERGENCY GENERATOR OPERATION IN MANUAL

4-1. INITIAL CHECK-OUT

4-2. ENGINE START

4-3. VOLTAGE ESTABLISHMENT

4-4. VOLTAGE CHECK AND ADJUSTMENT

4-5. FREQUENCY CHECK

4-6. FEEDING TO LOADS

4-7. ENGINE STOP

5. AUTOMATIC START-STOP CONTROL OF EMERGENCY GENERATOR

5-1. SUMMARY

5-2. NECESSARY PREPARATION FOR AUTOMATIC STARTING

5-3. AUTOMATIC STARTING

5-4. AUTOMATIC DISCONNECTION

CHAPTER 3. SHORE CONNECTION AND INTERLOCKING

1. SHORE CONNECTION FOR 440V CIRCUIT (WHERE SUPPLY OF POWER IS MADE FROM A SOURCE ON SHORE)

1-1. PROCEDURE

1-2. 440V SHORE INTERLOCKING

CHAPTER 4. MISCELLANEOUS

1. EARTH LAMPS

2. PREFERENCE TRIPPING SYSTEM

3. TROUBLE ALARM SIGNALS

Chapter 1 general

1. Introduction

A. MAIN SWITCHBOARD IS AN INTEGRATED ASSEMBLY OF SWITCHING CONTROLS, REGULATOR EQUIPMENT, MEASURING INSTRUMENTS, INDICATORS AND PROTECTIVE DEVICES AND IS A NECESSARY APPARATUS FOR EFFICIENT CENTRALIZED CONTROL OF THE ELECTRICAL SYSTEMS AND POWER-OPERATED EQUIPMENTS,

THIS MAIN SWITCHBOARD DISTRIBUTES ELECTRICAL POWER TO THE ELECTRICAL LOADS IN VARIOUS LOCATIONS IN THE SHIP. IF A FAULT OCCURS AT A PLACE, AN APPROPRIATE PROTECTIVE DEVICE IN THE SWITCHBOARD WILL OPERATE TO DISCONNECT THE FAULTED CIRCUIT. ONE OR MORE OF THE FOLLOWING

GENERATORS ARE OPERATED AND CONTROLLED, DEPENDING ON THE SIZE OF LOAD, FROM THIS MAIN SWITCHBOARD, AND SUPPLY THE POWER TO THE FEEDER CIRCUITS THROUGH THE RESPECTIVE FEEDER PANELS.

B. THE EMERGENCY SWITCHBOARD IS PROVIDED FOR AUTOMATIC/MANUAL CONTROL AND TESTING OF AN EMERGENCY ENGINE-GENERATOR SET, FOR MONITORING THE EMERGENCY GENERATOR IN OPERATION, AND FOR CONTROL OF FEEDING TO ESSENTIAL SERVICES, UNDER NORMAL CONDITION, THE ESSENTIAL LOAD CIRCUITS ARE SUPPLIED FROM THE MAIN SWITCHBOARD VIA THIS EMERGENCY SWITCHBOARD, SHOULD THE MAIN SWITCHBOARD DEVELOP A LOW VOLTAGE OR DEAD BUS TROUBLE UNDER THE ABOVE CONDITION, THEN THE BUS-TIE MAGNETIC CONTACTOR ON THIS EMERGENCY SWITCHBOARD WILL BE OPENED AND THE EMERGENCY GENERATOR WILL BE AUTOMATICALLY STARTED,

WHEN THE EMERGENCY GENERATOR REACHES SYNCHRONOUS SPEED AND BUILDS UP SUFFICIENT VOLTAGE, ITS CIRCUIT BREAKER WILL BE AUTOMATICALLY CLOSED TO RESTORE THE ESSENTIAL SERVICES.

2. Generators

THERE IS ONE EM'CY GENERATOR FOR EM'CYSWITCHBOARD RATED AC 450V 3PH 60HZ 687.5KVA.

3. Rules and regulations

THE SWITCHBOARDS ARE MANUFACTURED TO THE REQUIREMENTS OF THE Germanise her Lloyd.

4. Construction

A. TYPE : THE SWITCHBOARDS ARE OF DEAD-FRONT TYPE HAVING NO LIVE

PARTS ON THE FRONT OF THE PANELS.

B. FRAMEWORKS : EACH FRAMEWORK IS RIGIDLY CONSTRUCTED OF STEEL

ANGLES FOR VIBRATION RESISTANCE AND TO WITCH A DOOR-TYPE PANEL OR PANELS OF 2.3mm THICK SHEET-STEEL ARE HINGED AT ONE SIDE WITH THE OTHER SIDE LATCHED FOR SECURING IT OR THEM IN PLACE,

WHEN INSPECTION OR SERVICING OF THE INTERNAL PARTS IS REQUIRED, TURN EACH KNOB LATCH 90 DEGREES ANTICLOCKWISE TO UNFASTEN, THEN THE PANEL IS OPENED AND HELD OPEN BY MEANS OF A METAL BAR,

INTERNAL DEVICES ( INSTRUMENT TRANSFORMERS, RELAYS, ECT, ) ARE SO MOUNTED THAT THEY ARE RESISTANT TO VIBRATION OR IMPACT, AND EASILY REPLACEABLE FROM THE FRONT OR BACK OF THE SWITCHBOARD.

C. INSULATING MATERIAL : MATERIAL USED FOR THE INSULATION OF MOST

DEVICES IS LAMINATED-PHENOLIC AND SPECIAL ATTENTION IS PAID TO THE CONFIGURATION FOR TEMPERATURE AND MOISTURE STABILITIES, TROUBLE FREE OPERATION AND SAFETY.

5. Air circuit breaker

ALL AIR CIRCUIT BREAKERS CAN BE OPERATED EITHER ELECTRICALLY OR MANUALLY.

FOR CONSTRUCTIONAL AND OPERATIONAL DETAILS, REFER TO THE TYPE " " AIR CIRCUIT BREAKER MANUAL.

** OPERATION METHODS

ELECTRICAL OPERATION

«AH» TYPE

THE ELECTRICAL OPERATION OF AN AIR CIRCUIT BREAKER IS INITIATED BY AN AUTOMATIC CONTROL SIGNAL PRODUCED IN THE MAIN SWITCHBOARD OR BY MANUAL OPERATION OF THE CORRESPONDING ONE OF BREAKER CONTROL SWITCHES ; THESE CONTROL SWITCHES ARE LOCATED ON THE SYNCHRO PANEL OF THE SWITCHBOARD AND MARKED " ACB CONTROL ", PUSH THE CLOSE OR OPEN PUSH BUTTON SWITCH IN ORDER TO CLOSE OR OPEN THE CIRCUIT BREAKER.

MANUAL OPERATION

" " TYPE

DIRECT MANUAL OPERATION OF THE AIR CIRCUIT BREAKER IS RECOMMENDED ONLY FOR INSPECTION AND MAINTENANCE. PULL THE MANUAL CONTROL LEVER OF THE BREAKER FORWARD TO CLOSE AND PRESS THE TRIP BUTTON IN THE BREAKER FRONT TO OPEN.