UNS4881b, V4 3BHE009949R0004 ABB Unitrol 5000 AVR device

Description

UNS4881b V4 3BHE009949R0004 ABB Unitrol 5000 AVR device

DESCRIPTION

UNS4881b V4 3BHE009949R0004 is a high-performance automatic voltage regulator(AVR)from ABB Unitrol 5000 series,designed specifically for power systems to dynamically regulate the excitation current of generators and ensure stable output voltage within the set range.This device automatically adjusts the excitation system by monitoring voltage,current,and load changes in real-time,protecting the generator from voltage fluctuations,overloads,or short circuits,while supporting efficient grid connection and load distribution.

UNS4881b, V4 3BHE009949R0004 ABB

Product parameters

model:UNS4881b V4 3BHE009949R0004

manufacturer:ABB

Input voltage range:Supports 380V~1000V AC.

Adjustment accuracy:within±0.5%(typical value).

Response time:≤100ms(rapid response to voltage changes).

Control mode:digital excitation control,supporting manual/automatic switching.

Communication interface:Modbus RTU/ASCII,Profibus DP or Ethernet.

Protection functions:overvoltage,undervoltage,overload,short circuit,demagnetization protection.

Power supply:24V DC or 110/220V AC.

Product specifications

Core functions:

Real time monitoring and adjustment of generator terminal voltage to maintain system stability.

Support synchronous grid connection control to ensure that the phase and frequency of the generator are consistent with the grid.

Provide excitation current limitation and power factor regulation functions.

Compatibility:Compatible with ABB excitation systems and third-party control systems(such as PLC,DCS).

Installation method:Standard rail installation or rack mounted installation.

series

Belonging to the ABB Unitrol 5000 series,this series is renowned for its high reliability,flexibility,and intelligence,and is widely used in the industrial and power sectors.

UNS4881b, V4 3BHE009949R0004 ABB

characteristic

High precision voltage regulation:dynamically compensates for load changes to ensure voltage stability.

Multiple protection mechanisms:Real time monitoring of overvoltage,overload,etc.to ensure equipment safety.

Modular design:supports quick replacement and expansion,and is easy to maintain.

Intelligent communication:Supports multiple protocols,facilitating remote monitoring and system integration.

Wide environmental adaptability:Operating temperature range of-20℃to+60℃,suitable for harsh industrial environments.

role

Stabilize the output voltage of the generator to avoid equipment damage caused by voltage fluctuations.

Optimize the efficiency of the excitation system and reduce energy consumption.

Support smooth synchronization between generators and the power grid to reduce grid impact.

Provide data recording and fault diagnosis to assist in preventive maintenance.

purpose

Generator excitation control(such as synchronous generators,diesel generators).

Grid connection and load balancing of the power system.

Voltage protection for industrial equipment such as motors and frequency converters.

Collaborate with ABB control system to achieve automated power generation management.

UNS4881b, V4 3BHE009949R0004 ABB

application area

Power generation industry:excitation control of generators in thermal,hydro,and gas-fired power plants.

Renewable energy:grid connection stability of distributed energy systems such as photovoltaics and wind power.

Industrial manufacturing:voltage stability of large motor drive systems(such as steel rolling and mining equipment).

Petrochemical industry:Independent power systems in remote areas such as offshore platforms and refineries.

Data center:Fast voltage response and switching of backup power sources(such as UPS).