ABB 3BHB017877R0001 PROTECTION RELAY

ABB 3BHB017877R0001 protection relay detailed analysis

I. Model and basic information

Product type: digital protection relay, used for fault detection and protection control of power systems.

Model meaning:

3BHB017877R0001: ABB standard part number, where "3BHB" is the prefix, "017877" is the product code, and "R0001" indicates the version number (Rev.0001).

Series: May belong to ABB's Relion series or other medium and high voltage protection relay product lines (need to be confirmed in conjunction with the manual).

II. Core functions and protection features

Protection function module (typical configuration):

Overcurrent protection: supports time overcurrent (OTF) and inverse time overcurrent (IDMT), which are used to detect line short circuit, overload and other faults.

Zero sequence current protection: monitor ground faults (ground overcurrent, small current ground selection) to prevent the expansion of system ground faults.

Voltage protection: overvoltage, undervoltage, and loss of voltage protection to prevent equipment from being damaged by abnormal voltage.

Distance protection: Determine the fault location by measuring impedance, often used for transmission line protection to distinguish internal and external faults.

Differential protection: Compare the current difference on both sides of the equipment to quickly remove internal faults (such as transformer and generator differential protection).

Frequency protection: Overfrequency and underfrequency protection, suitable for generator grid connection or grid frequency stability control.

Control and monitoring functions:

Switching input/output: Supports multiple DI/DO channels for receiving external signals (such as circuit breaker position) or outputting trip/alarm commands.

Analog acquisition: Real-time monitoring of electrical parameters such as voltage, current, and power, with an accuracy of more than 0.5 levels.

Event recording and fault recording: Store protection action events and fault waveforms (sampling rate ≥1kHz) for subsequent analysis.

3. Technical characteristics and interfaces

Electrical parameters:

Rated voltage: AC input (such as 100V/220V/380V) or DC input (such as 24V/110V/220V), please refer to the manual for details.

Rated current: The rated current of the measurement circuit is 5A or 1A, and the protection circuit can withstand short-term large current (such as 100In, 1s).

Communication interface: Supports IEC 61850, Modbus RTU/TCP, CANopen and other protocols, and can be connected to the substation automation system (SAS).

Hardware design:

Modular structure: main board + function expansion board (such as communication board, input and output board), supporting flexible configuration.

Anti-interference ability: Complies with IEC 61000-6-2/4 electromagnetic compatibility standards, and adapts to strong electromagnetic environments in industrial sites.

Display and operation: Equipped with LCD display or LED indicator, supports local parameter setting and fault query.