TECHNICAL SPECIFICATIONS FOR 30kVA DIESEL ENGINE GENERATOR CHATO AIRPOT ft

TECHNICAL REQUIREMENTS

1.0 INTRODUCTION

• This specification covers provision of Diesel Engine Generators set complete with automatic
• Changeover switch (ATS). The diesel engine generator and the generating set as a whole shall
• be rated for 400VAC, 3phase, 50Hz, 30kVA rated prime power capacity.
• The DEG set shall be capable of delivering 30kVA at prime power under worse case conditions.
• 1.1 Scope of work:
• The Specification covers supplying of Diesel Engine Generator 30kVA Prime rated @ 1500
• rpm, 50Hz, 380-415Volts, 3phase 4 wire and 0.8 pf protected with a sound proof canopy, on
• skid with base service fuel tank of at least 500Litres capacity, complete with all standard
• instruments, AMF control, associated accessories and Automatic changeover Switch (ATS)
• 1.2 Composition:
• The Diesel Engine Generator (DEG) unit shall comprise of the following: Diesel Engine
• Generator set, automatic transfer switch/Changeover switch (ATS), fuel tank, Exhaust system,
• starter battery, battery charger and Outdoor whether protection and sound attenuating Enclosure.
• Suitable rated surge arrestors (63 k amp or above) shall be provided to the mains input for
• protection against lightning strikes.
• The DEG hall be supplied as a complete set.

2.0 Protection

• The engine shall be protected against low oil pressure, high engine temperature, engine
• under/over speed, under/over voltage and cooling system failure, battery charge failure, and low
• fuel level. Protection devices shall give visual indication and facilities for external alarm.

3.0 Diesel Engine:

• The diesel engine shall comply with the specified International IEC standards or equivalent
• international standards and shall be of water cooled.
• The engine shall incorporate instrument panel with the following meters and control: -
• a) Oil pressure — switch and gauge
• c)Hours-run meter
• d)Stop button
• e)Temperature switch and gauge
• 3.1 The engine shall be fitted with a residential type of silencer to reduce noise. Anti pollution
• device shall be fitted in the exhaust system as optional requirement
• 3.2 Automatic lubricating oil top up system shall be incorporated in the engine to reduce oil change
• intervals, thus allowing maintenance intervals hours.

4.0 Cooling system

• The cooling system shall be filled with chemically treated coolant. Rotating parts shall be
• guarded against accidental contact in accordance with standard requirements.
• 4.1 Exhaust system
• The Engine shall be efficiently silenced and be complete with primary and terminal silence
• arrangements

5.0 Control equipment for the Engine Generator

• The control panel shall perform automatic control and monitoring of the engine generator set, .
• Such functions shall include but not limited to the following: -
• •Start the engine to supply AC power to the load when mains power falls outside the
• desired value and stop the engine when mains power restored to normal condition.
• •Stop the engine to protect it from damage when any of the protection devices is actuated.
• •Display locally the status of engine generating and mains power condition. Among the
• indicators shall include meters to visually monitor out-put voltage, frequency, load
• current, starter battery charging current and voltage and hour run meter. Meters shall
• have an accuracy of + 2% or better.
• •Engine control shall have AMF control and remote supervision function, shall have the
• capability of storing data.
• 5.1 The control panel shall incorporate the under mentioned switches: -
• a)Phase selector switches for voltmeter/ammeter for mains and generator power
• b)Battery charge control switch
• c)Duty selector switches (AUTOMATIC/MANUAL).
• d)Plant control switch (OFF/TEST/MANUAL/AUTOMATIC)
• e)Load transfer switch, electrically and mechanically interlocked.
• f)A push button fault resets switch.
• 5.2 Indications and Alarms.
• The following indicators and alarms shall be provided: -
• a)i) MAINS on LOAD light
• ii) STANDBY LOAD indicators
• b)Plant failure indicator lamp and alarm terminals.
• c)MINOR alarm signal (without stopping the engine).
• i)LOW FUEL LEVEL
• ii)BATTERY CHARGER FAILURE
• iii)CONTROL CUBICLE ON MANUAL CONTROL
• iv)MAINS FAILURE
• d) MAJOR alarm signal and engine shut down at:-
• i)ENGINE FAILURE, after three start attempts
• ii)LOW OIL PRESSURE
• iii)ENGINE OVERHEAT
• iv)ENGINE OVER SPEED, due to governor failure
• v)FREQUENCY TOO LOW
• vi)UNDER VOLTAGE, due to AVR. failure
• vii)OVER VOLTAGE, due to AVR failure
• viii)OVER CURRENT at 115%
• x) COOLING SYSTEM FAILURE
• The Engine shall be fitted with device which will shut off the fuel supply to the engine
• when any of the specified alarm conditions occur.
• 5.3 Alarm signals shall be transmitted to remote control office either individually or suitably