In order to protect the generator safely and comprehensively, Sices has introduced a multi-function protective relay accessory the Sices D-Pro. Multifunction protective relays are used to provide additional generator protection in more demanding applications, such as medium or high voltage power plants, or oil and gas installations. D-Pro was researched to extend the functions and protections already in the alternator controller enhancing its performance.

Cổng D-PRO

Below are protection functions of the protection relay TTTT Sices D-pro

  • Voltage protection relay 
  • Current protection relay
  • Ground fault protection relay
  • Power protection relay 
  • Frequency protection relay 
  • Differential protection relay 
  • Phase protection relay

Voltage protection relay (Overvoltage relay) of Sices D-Pro

  • Low voltage relay (27): The relay that is primarily responsible for protecting when the generator’s voltage drops below the allowable limit, it will take action to protect the system, thereby helping to stabilize the system and safer in use.
  • Time depends on voltage (27T): There is a function to adjust the time to take action when a low voltage problem occurs on the system.
  • Overvoltage relay (59): The relay that is primarily responsible for protection when the generator’s voltage rises too high, will take action to protect the system, thereby helping to stabilize the system and safer in use.
  • Neutral overvoltage relay (59N): Sices D-Pro protective relay that is primarily responsible for protection when the generator voltage rises to an excessively high level in the neutral wire, it will take action to protect the system, so that make the system more stable and safe during use.

Current protection relay (Over current protection relay)

  • Over current protection relay that cuts quickly (short circuit) (50): A relay that is primarily responsible for protection when the generator current increases suddenly (short circuit) more than the allowable level, causing protective action. system protection.
  • Overcurrent protection relay that cuts quickly (short circuit) to ground (50N): The relay is mainly responsible for protection when the generator current increases suddenly (short circuit) in the neutral wire more than the allowable level. will take action to protect the system.
  • Instantaneous limited current protection relay (50V): The relay that is primarily responsible for protecting the generator system when the current rises instantaneously.
  • Overcurrent protection relay with time to earth (overload) (51N): A relay mainly responsible for protection when the generator current increases over time (overload) in the neutral wire more than the level allow will take action to protect the system.
  • Time-limited current protection relay (51V): A relay mainly responsible for protecting the generator system when the current increases over time.
  • Overcurrent protection relay with time (overload) to earth (51N): The relay is mainly responsible for protection when the generator current increases over time (overcurrent) in the neutral wire more than the level allow will take action to protect the system.

References: Generator protection relay

References: Generator auto transfer switch


Ground fault protection relay

  • Ground fault protection relay (64): A relay that is primarily responsible for protection when the power line is grounded, which will act to protect the safety and stability of the system.

Power protection relay

  • Active power protection relay (32P): The relay that is mainly responsible for protecting the generator’s active power when it rises above the maximum level will give system protection action.
  • Power reverse protection relay (32R): The relay is mainly responsible for power reverse protection to help the system operate at its best.
  • Reactive power protection relay (32Q): The relay that is primarily responsible for protecting the generator’s reactive power when it rises above the maximum level will give system protection action.
  • Excitation loss protection relay (40): The Sices relay is mainly responsible for protecting the generator from losing magnetic fields to avoid affecting the system.

Frequency protection relay

  • Over-frequency protection relay (81O): The relay that is mainly responsible for protecting the generator frequency when it rises to an excess, will take action to protect the system.
  • Over-frequency protection relay (81U): The relay that is mainly responsible for protecting the generator frequency when it drops to the allowable level will take action to protect the system.

Differential protection relay

  • Misalignment protection relay (87G): The relay is mainly responsible for differential protection for the motor to avoid affecting the system.

Phase protection relay

  • Reverse phase protection relay and phase current unbalance protection relay (46): The relay that is mainly responsible for the reverse phase protection of the system and the phase current unbalance protection will take action to protect the system.
  • Reverse phase and phase voltage unbalance protection relay (47): The relay that is mainly responsible for the reverse phase protection of the system and the phase voltage unbalance protection will take action to protect the system.

Company name:

TTTT GLOBAL co Ltd,.

Address: Landmark 4 Building, Vinhomes Central Park, 720A Dien Bien Phu Str, Ward 22, Binh Thanh District, Ho Chi Minh City, Vietnam.

Website: https://ttttglobal.com/en/

Hotline: +84286 2728 334

Email: Info@ttttglobal.com

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