Protection relay functions: over voltage, current, phase

In order to protect the generator safely and comprehensively, Sices has introduced a multi-function protection 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 protective relay
Power protection relay
Frequency protection relay
Differential protecting relay
Phase protective relay

Contents

1 Voltage protection relay (Overvoltage relay) of Sices D-Pro
2 Current protection relay (Over current relay)
3 Ground fault protective relay
4 Power protection relay
5 Protection relay functions: Frequency protective relay
6 Protection relay functions: Differential protection relay
7 Protection relay functions: Phase protective relay
- 7.1 CATEGORY: SICES DOCUMENTS

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 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 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 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 relay (51V): A relay mainly responsible for protecting the generator system when the current increases over time.
Overcurrent 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: Automatic Transfer Switch

Ground fault protective 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 protecting relay (32R): The relay is mainly responsible for power reverse protection to help the system operate at its best.
Reactive power 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 protective relay (40): The Sices relay is mainly responsible for protecting the generator from losing magnetic fields to avoid affecting the system.

Protection relay functions: Frequency protective 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 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.

Protection relay functions: Differential protection relay

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

Protection relay functions: Phase protective 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 protecting 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.

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TTTT GLOBAL co Ltd,.

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