APD-NG425 product details and specifications:

General Characteristics 

• Model Name: APD-NG425 

• Engine Make: PSI (Doosan) 

• Engine Model: 21.9L 

• Alternator Make: Stamford 

• Control Panel Make & Model: DSE 7320 

• Frequency & Speed: 60Hz, 1800rpm 

• Enclosure Make & Model: AKSA AUL 71A/72A 

Genset Rating 

• 480/277V, 0.8 PF: 425kW NG standby (639A) / 300kW LP standby (451A) 

• 240/120V, 0.8 PF: 420kW NG standby (1264A) / 300kW LP standby (902A) 

• 208/120V, 0.8 PF: 420kW NG standby (1458A) / 300kW LP standby (1040A) 

• 600/347V, 0.8 PF: 425kW NG standby (511A) / 300kW LP standby (361A) 

• EPA – Certified for Emergency Stationary Applications 

Engine Data 

• Manufacturer: PSI 

• Model: 21.9L 

• Displacement & Cylinders: 21.9 L / 12 Cylinders 

• Engine Type: V-type, 4 Cycle 

• Engine Speed: 1800rpm 

• Engine Standby Power NG: 510 kWm 

• Engine Standby Power LP: 352 kWm 

• Aspiration: Turbo Charge Air Cooled 

• Compression Ratio: 10.5 : 1 

• Bore / Stroke: 128 mm / 142 mm 

• Governor Type: Electronic 

Electric System 

• System Voltage (dc): 24V 

• Battery Qty, Rating: 2 x 120Ah 

Cooling System 

• Radiator Cooling System Type: Closed Circuit 

• Coolant Capacity: 51 gal 

• Cranking Temperature: 160˚F 

• Full Open Temperature: 185˚F 

Exhaust System 

• Type: Water cooled manifold 

• Max. Allowable Back Pressure: 10.2 kPa 

• Max Turbine Outlet Temperature: 1136˚F 

• Exhaust Gas Flow at Turbine Outlet Temperature: 2821 cfm 

Air Intake System 

• Combustion Air Required: 829 cfm 

• Max Intake Air Restriction (Clean Element): 1.2 kPa / 5 inH2O 

• Air Filter Type: Dry Paper Element 

Fuel System 

• Fuel Type: NG, LP Gas/Dual Fuel 

• NG Supply Pipe Size: 2x2.0” NPTF 

• Maximum EPR Rated Pressure: 6.9 kPa / 1.0 psi 

• Recommended Max Pressure: 2.7 kPa / 11.0 inH2O 

• Recommended Min Pressure: 1.7 kPa / 7.0 inH2O 

• Max LPG Vapor Pressure to EPR: 2.7 kPa / 11.0 inH2O 

Fuel Consumption (Standby Power, 100%) 

• Natural Gas: 5375 ft³/h (152 m³/h) 

• LP Gas: 44 gal/h (166 L/h) 

Lubrication System 

• Oil Specifications: SAE 15W-40 Low Ash Gas Engine oil, API CD/CF or higher 

• Oil Capacity, Min-Max: 35 – 42.4 Qts 

• Oil Filter: 2, Cartridge 

• Min – Max Oil Pressure @1000rpm (Idle): 13 psi – 44 psi (0.9 bar – 3 bar) 

Alternator Data 

• Manufacturer: Stamford 

• Standards: BS EN 60034 

• Control System: PMG 

• A.V.R.: MX341 

• Voltage Regulation: ± 1 % 

• Insulation System: Class H 

• Protection: IP23 

• Rated Power Factor: 0.8 

• Stator Winding: Double Layer Concentric 

• Winding Pitch: Two Thirds 

• Winding Leads: 12 

• Telephone Interference: THF < 2 % 

• Waveform Distortion: No Load < 1.5 % 

• Maximum Over Speed: 2250 rev/min 

Controller Data 

• Manufacturer: DSE 

• Model: 7320 MK II 

• Microprocessor controlled, UL & NFPA110 Compatible 

• License free PC Software (Non-proprietary Software) 

• IP65 rating offers increased resistance to water ingress 

• Modules can be integrated to building management systems 

• Real time clock provides accurate event log 

• Four line back-lit LCD text display 

• Five key menu navigation, two wire start/stop at Auto mode 

• Front panel editing with PIN protection 

• Support up to three remote display modules 

• Configurable timers and alarms 

• Multiple date and timer scheduler 

• Integral PLC editor 

• ‘Protections disabled’ feature 

• Load switching (load shedding and dummy load outputs) 

• Fully configurable via DSE Configuration Suite PC Software 

• SCADA monitoring via DSE Configuration Suite PC Software 

Controller Protection 

• Gen. Voltage – under / over 

• Gen. Frequency – under / over 

• Engine Speed – under / over 

• Engine Oil Pressure – low 

• Engine Temp – low / high 

• Battery Voltage – low / high 

• Weak Battery 

• Fail to Start / Stop 

• Charge Alternator Fail 

• Over Current & Load (kW/kVAr) 

• Unbalanced Load 

• Independent Earth Fault 

• Reverse Power 

• Loss of Speed Signal 

Controller Instruments 

• Gen. Voltage (L-L/L-N) 

• Gen. Frequency 

• Engine Speed 

• Oil Pressure 

• Water Temperature 

• Battery Voltage 

• Run Time 

• Phase Sequence 

• Power Monitoring (kWh/kVAh/kVArh) 

• Power (kWh/kVAh/kVArh) 

• Power Factor 

• Generator Current 

• Generator Load (%) 

• Earth Current 

Battery Charger & Electrical System Data 

• Manufacturer: ComAp 

• Model: InteliCharger 

• Input Voltage: 85V ~ 264V AC 

• Output Voltage / Current: 13.8V Float / 4A pk 

Jacket Water Heater Data 

• Manufacturer: Hotstart 

• Model: CKM1030260-000 

• Input Voltage: 240V 

• Power: 3000W 

Open Skid Gen-Set Dimensions 

• Length: 158 in 

• Width w/o lift hooks: 83 in 

• Height: 87 in 

• Dry Weight: 11,500 lb 

Enclosed Gen-Set Dimensions – Level 1 

• Length: 206 in 

• Width w/o lift hooks: 86 in 

• Height: 101 in 

• Dry Weight: 15,000 lb 

• Sound Pressure @ 7 meters: 80 dBA 

Enclosed Gen-Set Dimensions – Level 2 

• Length: 224.6 in 

• Width w/o lift hooks: 86 in 

• Height: 101 in 

• Dry Weight: 15,500 lb 

• Sound Pressure @ 7 meters: 77 dBA 

Enclosure Features 

• Heavy Duty Steel / Aluminum Structure 

• E-Stop on Enclosure 

• Control Panel Eliminated from Engine Vibrations 

• Standard Sound Attenuation Foam 

• Plastic Covered Corrosion Resistant Locks & Hinges 

• Internally Mounted Exhaust System with Rain Cap 

• Coolant Fill Cap 

• Removable Base Frame Lifting Hooks 

• Oil & Coolant Drain Ports 

• Easy Access for Maintenance 

Codes & Standards 

• Designed and manufactured in a facility certified to ISO9001 standards 

• Designed and manufactured in a facility certified to ISO14001:2015 standards 

• AKSA Power Generation provides single source responsibility for the generator set & accessories 

• Prototype tested and production tested according to the UL test program 

• Meets NFPA70, 99, 110, 37 Level 1 when equipped with the necessary accessories and installed per NFPA standards 

• Engine must be equipped with a fast start kit for NFPA110 Level 1 applications 

Standard Features & Accessories 

• UL2200 Certification 

• Heavy Duty Steel Base Frame 

• PMG 

• Engine Jacket Water Heater 

• Battery and Battery Rack 

• Battery Charger 

• Anti Vibration Pads between Engine/Alternator & Base Frame 

• Critical Grade Silencer Inside Enclosure 

• Residential Grade Silencer Set for Open Skid Sets 

• Exhaust outlet rain cap and radiator fill cap 

• Sound Absorb Foam Material for Enclosure 

• Emergency Stop Button 

• Oil Drain Valve 

• Coolant Drain Valve 

• Jacket Water Heater Isolation Valves 

• Flex Fuel Lines 

• Secondary Lock-off Valve on Baseframe 

• Engine Manifold Cover 

• Turbocharger Cover 

• Protection Covers for Rotating Parts 

• Exhaust Insulation Cover 

• Enclosure DC Light 

• Operations Manual 

• 24 Months / 2000 hours Limited Standby Warranty 

Optional Accessories 

• Main Line CB (3 / 4 Poles – 80% / 100% rated) 

• Upsize Alternator 

• Anti-condensation Heater 

• Voltage Regulation ±0.5% w/MX321 AVR 

• Gas Regulator 

• NG / LP Auto Changeover Control System 

• Low Gas Pressure Alarm 

• Low Coolant Level Alarm 

• Oil Pan Heater 

• Oil Temperature Display on Controller 

• Manual Speed Adjust Rheostat 

• Manual Voltage Adjust Rheostat 

• Remote Annunciator Panel 

• Remote Control & Monitoring Panel 

• Advanced SMS Messaging 

• Control Panel Heater 

• Battery Disconnect Switch 

• Battery Heater 

• Battery Charger 10/20 Amp 

• Shunt Trip / Aux Contacts 

• Spring Anti-vibration Isolators 

• Automatic Transfer Panel (ATS) 

• 5 Years / 2000 hours Limited Comprehensive Warranty 

product specifications:

product related documents:

APD-NG425.pdf