1. Unit Overview
The 800KW Diesel Generator Set is a robust and efficient power generation system designed to deliver reliable electricity for diverse applications. It integrates a diesel engine, a three-phase AC synchronous alternator, a control panel, and a common base frame into a single, user-friendly unit suitable for both prime and standby power needs.
800KW Yuchai Diesel Generator
- 800KW Yuchai Diesel Generator
- Model: Open frame
- Unit Model: XN800YC
- Standby Power: 800KW
- Prime Power: 720KW
- Dimensions: 4100 x 1760 x 2400 mm
- Weight: 7200 kg
- Speed: 1500 r/min
- Fuel Consumption :209 g/kW.h
- Frequency: 50 HZ
- Model: XN-800CDG
- Standby Power: 800KW
- Rated (Continuous) Power: 720KW
- Operating Frequency: 50Hz
- Dimensions (LxWxH): 4100 x 1760 x 2400 mm
- Weight: 7200 kg
- Engine Speed: 1500 r/min
- Fuel Consumption: Approximately 209 g/kW.h
2. Output Power Description
2.1 Prime Power (PRP):
The prime power rating denotes the maximum power the generator set can supply continuously under variable load conditions, with no annual operating hour limits, provided maintenance follows the manufacturer’s guidelines. The unit’s rated power is based on this specification.Operational Requirement: Capable of delivering prime rated power for 12 continuous hours, including 1 hour at 110% overload within each 12-hour cycle.
2.2 Standby Power (LTP):
The standby power rating represents the maximum power available for limited-time operation, up to 500 hours annually, under agreed conditions and with proper maintenance. It is ideal for emergency or backup power scenarios.
3. Normative References
The generator set’s design and manufacture adhere to the following international and industry standards:
ISO 8528: Reciprocating internal combustion engine driven AC generating sets
IEC 60034: Rotating electrical machines
ISO 3046: Reciprocating internal combustion engines – Performance
GB/T 2820-2008: Chinese equivalent to ISO 8528 series
JB/T 10303-2001: Technical conditions for industrial frequency diesel generator sets
Note: In case of discrepancies between standards, the more stringent requirement prevails.
4. Environmental Conditions
4.1 Standard Rating Conditions:
Atmospheric Pressure: 100 kPa (sea level)
Ambient Temperature: 25°C (298 K)
Relative Humidity: 50%
4.2 Rated Power Operation Conditions:
The unit delivers rated power under:Altitude: ≤ 1000 m
Ambient Temperature: ≤ 45°C
Relative Humidity: ≤ 90%
4.3 Specified Power Operation Conditions (with Correction):
The unit operates reliably with adjusted power output under:Altitude: ≤ 3000 m
Ambient Temperature: -25°C to 50°C
Relative Humidity: Up to 95% (at 25°C for the wettest month)
5. Main Technical Specifications of the Generator Set
Parameter | Specification |
|---|---|
Power / Capacity | 800 kW / 1000 kVA (±5%) |
Rated Voltage | 230/400 V AC |
Rated Frequency | 50 Hz |
Rated Current | 1442 A |
Power Factor (cosφ) | ≥ 0.8 (lagging) |
Rated Speed | 1500 r/min |
Phase Configuration | 3-phase, 4-wire, Y-connection |
Cooling Method | Closed-loop forced water cooling |
Starting Method | 24 V DC electric start |
Speed Regulation | ECU electronic control |
Voltage Regulation | Automatic (AVR) |
Excitation Method | Brushless |
Insulation Class | H |
Protection Class | IP21 |
Control Mode | Manual / Automatic |
Radiator Design Temperature | ≤ 45°C |
6. Main Technical Specifications of the Engine
Parameter | Specification |
|---|---|
Engine Power | 800 kW (±5%) |
Rated Speed | 1500 r/min |
Configuration | In-line, direct injection |
Intake Method | Turbocharged with intercooler |
Number of Strokes | 4 |
Number of Cylinders | 12 |
Starting Method | 24 V DC electric start |
Cooling Method | Closed-loop forced water cooling |
Compression Ratio | 15:1 |
Crankshaft Rotation | Counterclockwise (viewed from flywheel) |
7. Main Technical Specifications of the Alternator
Parameter | Specification |
|---|---|
Alternator Power | 800 kW (±5%) |
Rated Speed | 1500 r/min |
Rated Frequency | 50 Hz |
Rated Voltage | 400/230 V AC |
Rated Current | 1442 A |
Power Factor (cosφ) | ≥ 0.8 (lagging) |
Efficiency | 95% (±3%) |
Waveform | Sine wave |
Phase Configuration | 3-phase, 4-wire, Y-connection |
Excitation Method | Brushless |
Voltage Regulation | AVR (Automatic Voltage Regulator) |
Insulation Class | H |
Protection Class | IP21 |
8. Main Performance Indicators of the Unit
8.1 Electrical Performance
Parameter | Unit | Limit Value |
|---|---|---|
Voltage | ||
Steady-state Voltage Deviation (δUst) | % | ≤ ±0.5 |
Transient Voltage Deviation (Sudden Load Reduction, δU+dyn) | % | ≤ +10 |
Transient Voltage Deviation (Sudden Load Increase, δU－dyn) | % | ≤ -10 |
Voltage Recovery Time (δS) | s | ≤ 2 |
Voltage Unbalance (δU) | % | ±1 |
No-load Voltage Adjustment Range (δU) | % | 95–105 |
Frequency | ||
Frequency Drop (δfst) | % | ≤ 5 |
Steady-state Frequency Band (βf) | % | ≤ 1.5 |
Transient Frequency Deviation (Sudden Load Reduction, δf+dyn) | % | ≤ +10 |
Transient Frequency Deviation (Sudden Load Increase, δf--dyn) | % | ≤ -10 |
Frequency Recovery Time (δS) | s | ≤ 2 |
8.2 Economic, Safety, Environmental, and Reliability Indicators
Indicator | Specification |
|---|---|
Economic Indicators | |
Fuel Consumption Rate | ≤ 195 g/kW.h |
Oil Consumption Rate | ≤ 0.8 g/kW.h |
Safety Indicators | |
Grounding | Reliable connection to common base with grounding bolt |
Insulation Resistance (Cold State) | > 2 MΩ (15–35°C, 45–75% RH); > 0.5 MΩ (25°C, 95% RH) |
Insulation Resistance (Hot State) | > 0.5 MΩ |
Dielectric Strength (Primary Circuit to Ground) | Withstands 1440 A, 50 Hz for 1 min |
Dielectric Strength (Secondary Circuit to Ground) | Withstands 750 V, 50 Hz for 1 min |
Environmental Pollution Limits | |
Vibration Amplitude | ≤ 0.5 mm (no-load to full-load) |
Noise Level (1 m from unit at full load) | ≤ 75 dB(A) |
Leakage Requirements | No electrical, water, or oil leaks |
Reliability | |
Overhaul Interval | ≥ 32,000 hours |
Mean Time Between Failures | ≥ 3,000 hours |
Fuel Tank Capacity | Supports 8 hours of continuous operation |
9. Main Control Functions of the Unit
The control system features a dedicated controller and high-quality components (e.g., Changshu Electric Switch or equivalent) for real-time monitoring, protection, and operation in manual or automatic modes.
9.1 Operation Functions:
Start/Stop, Power Switch, Emergency Stop
9.2 Display Functions:
Voltage, Current, Frequency
Apparent Power (kVA), Active Power (kW), Reactive Power (kVAR)
Energy (kWh, kVAh, kVARh), Power Factor (PF)
Engine Speed, Oil Pressure, Coolant Temperature, Running Time, Battery Voltage
9.3 Protection Functions:
Short-circuit protection (single-phase, two-phase, three-phase)
Overspeed: Alarm at 110% rated speed, shutdown at 115%
Underspeed: Shutdown at 80% rated speed
Low Oil Pressure: Alarm at 0.25 MPa, shutdown at 0.20 MPa
High Water Temperature: Alarm at 90+2°C, shutdown at 93+2°C
Overvoltage: Shutdown at 120% rated voltage
Undervoltage: Shutdown at 80% rated voltage
Overcurrent: Shutdown at 115% rated current
Overload: Shutdown at 115% rated power
Overfrequency: Shutdown at 110% rated frequency
Underfrequency: Shutdown at 94% rated frequency
Low Battery Voltage: Alarm at 19 V
9.4 Battery Charging:
Float charging via mains power in standby mode
Switches to alternator charging during operation
9.5 Automatic Start/Stop Function:
Starts upon receiving a start signal; stops with a stop signal
Three start attempts at 10-second intervals; alarms if unsuccessful
Self-start success rate: ≥ 99%
9.6 Language Interface:
English interface for all controls
10. Structure and Working Principle
The generator set comprises a diesel engine, a three-phase AC synchronous alternator, a control panel, and a common base frame. The engine and alternator are coupled via a flexible disc and mounted on the base with vibration isolators. The control panel is positioned on the base frame for accessibility.
Engine: A turbocharged, intercooled, four-stroke, water-cooled, in-line diesel engine with electronic speed control and 24 V DC start.
Alternator: A brushless, self-excited, synchronous AC alternator with AVR for stable power output.
Control Panel: Monitors operations, displays parameters, and provides protection and automation functions.
This integrated design ensures ease of installation, operation, and maintenance, making the unit versatile for various power generation needs.
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