The protection system for large diesel generators (1000-2000KW) shall be equipped with the following protection functions:
Overcurrent Protection (ANSI 50/51): Prevents damage to the generator set caused by overload or short circuit.
Overvoltage Protection (ANSI 59): Protects the windings and insulation of the generator set from damage caused by overvoltage.
Undervoltage Protection (ANSI 27): Ensures the generator set trips in a timely manner when the voltage is too low to avoid equipment damage.
Differential Protection (ANSI 87G): Used to detect short-circuit faults in the internal windings of the generator.
Reverse Power Protection (ANSI 32): Prevents the generator set from operating in a reverse power state, which could cause equipment damage.
Frequency Protection (ANSI 81): Ensures the output frequency of the generator set remains within the normal range to avoid impacts on load equipment.
Oil Temperature Protection (ANSI 76): Monitors the oil temperature of the generator set and triggers an alarm or trip when the oil temperature is too high.
Oil Pressure Protection (ANSI 74): Ensures the oil pressure of the generator set is normal to prevent engine damage due to oil shortage.
Water Temperature Protection (ANSI 75): Detects the water temperature of the engine and triggers a protection action when the water temperature is too high.
Overload Protection (ANSI 49): Prevents the generator set from operating beyond its rated power due to excessive load.
Short-Circuit Protection (ANSI 50): Quickly cuts off short-circuit current to protect the safety of the generator set and power grid.
Ground Fault Protection (ANSI 50N/51N/64): Prevents ground faults in the generator set and ensures personal safety.
Start-Up Protection (ANSI 25): Provides protection for the engine and generator during the start-up process of the generator set.
Shutdown Protection (ANSI 05): Protects the equipment during the shutdown process of the generator set to prevent damage caused by misoperation or faults.
The above are common protection configurations. Actual configurations may vary depending on the specific specifications of the generator set, application scenarios, and relevant standard requirements. When configuring protection, it is also necessary to consider coordination with other systems to ensure the safe and stable operation of the entire power system. Meanwhile, regular inspection and maintenance of protection devices are extremely important. If you have more detailed requirements for specific protection configurations, it is recommended to consult professional electrical engineers or relevant technical personnel for more accurate and suitable advice.
Note: Our company’s VIP-9883C Generator Integrated Protection Relay is equipped with the above-mentioned protection functions, and is suitable for the protection needs of various large diesel generator sets. Enquiries are welcome.
