PT20K-SAE: Home Standby Diesel Generator (3-Phase)

Overview:

Compact, sound-attenuated diesel generator set
Designed for standby/home backup or light continuous power applications
Powered by Kubota engine, close-coupled to Leroy Somer alternator
Housed in powder-coated acoustic canopy
Rated for 50 Hz three-phase (3-phase/5-wiring) operation at 1500 rpm

Key Ratings:

Model: PT20K-SAE
Prime Power: 18 kVA / 14 kW
Standby Power: 20 kVA / 15 kW
Frequency / Speed: 50 Hz 1500 rpm
Phase: 3-phase / 5-wiring
Voltage options: 380 V / 400 V / 415 V / 440 V
Current: 27.3 A (380 V), 26.0 A (400 V), 25.0 A (415 V), 23.6 A (440 V)
Sound pressure level: 61.0 dBA 7 m
Dry weight: 740 kg
Dimensions (L × W × H): 1,850 × 792 × 1,223 mm
Fuel tank capacity: 120 L (approx. 30 hours runtime)

Fuel Consumption:

25% load: 0.975 L/h
50% load: 1.95 L/h
75% load: 2.9 L/h
100% load: 3.9 L/h
110% load: 4.3 L/h

Engine – Kubota D1803-M-DI-BG:

Manufacturer: Kubota
Model: D1803-M-DI-BG
Configuration: 3-cylinder, direct injection, natural aspiration
Displacement: 1.65 L
Bore × Stroke: 87 mm × 102 mm
Compression ratio: 16.0 : 1
Dimensions (L × W × H): 611.4 × 490 × 682.5 mm
Dry weight (approx.): 211 kg
Cooling: Water-cooled with pusher fan
Oil capacity: 13.2 L (Class CF lubricating oil)
Fuel type: Diesel Fuel No. 2-D (ASTM D975)
Battery voltage: 12 V
Standby power: 17.2 kW
Prime power: 15.6 kW
Fuel consumption (100% load): 3.9 L/h
Intake resistance: 1.96 kPa
Back pressure: ? 7.07 kPa

Alternator – Leroy Somer LSA40M5:

Manufacturer/Brand: Leroy Somer
Model: LSA40M5
Excitation: Brushless, self-excited (SHUNT)
AVR: SX440
Insulation class: H
Winding pitch: 2/3
Windings: 100% copper
Terminals: 12
Protection: IP23 (drip-proof)
Voltage regulation: ±1.0%
Total harmonic distortion: < 1.5% (no load) / < 5% (on load)
Telephone interference: THF < 2%; TIF < 50
Overspeed capability: 2,250 rpm
Altitude rating: ? 1,000 m
Cooling fan: Cast alloy aluminium

Control System – DSE 4520 MKII:

Deep Sea Electronics DSE 4520 MKII Auto Mains (Utility) Failure control module
Compact, fully configurable Auto Start / AMF controller
Large back-lit icon LCD display

Key features & functions:

Configurable as Auto Start or Auto Mains Failure (AMF) controller
Manual, Auto and Stop/Reset modes
3-phase generator & mains (utility) voltage/frequency sensing
Generator & load power monitoring (kW, kVA, kVAr, pf)
Accumulated energy monitoring (kWh, kVAh, kVArh)
Generator overload (kW) and current protection
Load unbalanced alarm
Engine speed protection, hours counter, pre-heat & idle control
3 engine maintenance alarms
Real-time clock with event logging
J1939 CAN support (with alarm ignore function)
Alternator frequency & CAN speed sensing
USB configuration via DSE Configuration Suite PC software or front-panel editor
Configurable inputs/outputs (digital & analogue)
Fuel & start outputs (configurable when using CAN)
Power-save / sleep / deep-sleep modes for low current draw
Battery voltage monitoring

Typical protections:

Low oil pressure
High engine temperature
Overspeed / underspeed
Under/over voltage & frequency
Charge failure
Fail to start / fail to stop
Overcurrent & overload
Auxiliary / emergency shutdown

Panel features retained:

Schneider main circuit breaker: 32 A
Key switch
Emergency stop button
ATS (automatic transfer switch) receptacle
Remote run connector
Time counter (hours)
Live / Neutral / Ground terminals
Mains input / remote communication connector

General Features & Construction:

Close-coupled engine–alternator assembly
Mechanical speed governor
45 °C radiator
Steel base frame with vibration isolators
Powder-coated sound-proof canopy
Dry-type air filter
Base-mounted fuel tank with drain points
1 × 12 V / 60 Ah sealed maintenance-free battery
Lockable battery isolator switch
Coolant heater required below 5 °C

Environmental limits:

Installation: Outdoors or well-ventilated indoors
Ambient temperature: –25 °C to +50 °C
Humidity: < 90%
Altitude: < 1,000 m above sea level

Overall Dimensions & Key Points:

Length: 1,850 mm
Width: 792 mm
Height: 1,223 mm
Key points: Exhaust gas outlet, coolant inlet, air inlet, cable trench, emergency stop switch, control cabinet, fuel drain, air outlet, access door, coolant drain hose fitting, oil drain hose fitting, wooden tray, lifting lug, base frame

Summary:

Compact, quiet (61 dBA 7 m) Kubota-powered three-phase diesel generator
18 kVA prime / 20 kVA standby
Fitted with industry-standard Deep Sea Electronics DSE 4520 MKII Auto Mains Failure controller
Full AMF capability, power monitoring, event logging and advanced engine/alternator protections
120 L fuel tank for extended runtime (approx. 30 hours)
Schneider 32 A main circuit breaker and full acoustic enclosure
Ideal for residential standby, small commercial or remote power applications
Meets Australian and international standards