ABB 7625013-S control unit

In stock

Eight-channel analog voltage input, supports -5V to +5V or -10V to +10V dual mode, with a resolution of 0.2mV (5V mode) or 0.4mV (10V mode), and an accuracy of 0.05%. It supports IDC current step compensation and power factor correction, improves copper/zinc electrolysis efficiency, and drives motor control, such as railway traction systems, to ensure stable operation.

Basic parameters

Model positioning: static excitation control module in ABB UNITROL series, modular digital exciter.

Input voltage: 100-240 V AC, input current 10-20 A.

Output voltage: 0-200 V AC, output current 0-20 A.

Insulation level: IP65, operating temperature range -25℃ to 60℃. ABB PCD231 - 3BHE025541R0101: Industrial Communication Module

2. Core functions

Excitation control:

Maintain generator voltage stability through PID controller and support reactive power compensation.

The digital output module provides control signals, drives the excitation winding and monitors the equipment status.

Monitoring and protection:

Rotor overvoltage protection: BOD board detects overvoltage, triggers the jumper to conduct, and consumes energy in the demagnetization resistor.

Demagnetization function: inverter demagnetization during normal shutdown, and quickly cuts off the excitation current during accident shutdown.

V/Hz limit: prevent excessive voltage at low frequency and protect the core flux density.

Communication capability:

Supports Ethernet, USB, RS232/485 interfaces, compatible with Modbus, Profibus and other protocols.

Can be integrated into ABB AC450/AC800PEC system to achieve cloud remote monitoring. ABB PCD231B101 - 3BHE025541R0101, High-Power Control Module

3. Hardware configuration

Processor and memory: 32-bit CPU, 128MB memory, to ensure fast execution of complex algorithms.

Analog input channel: Eight-channel analog voltage input, supports -5V to +5V or -10V to +10V dual mode, resolution of 0.2mV (5V mode) or 0.4mV (10V mode), accuracy 0.05%.

II. Application scenarios and typical cases

1. Power industry

Yangxi Power Plant: UNITROL 6800 system is applied to 600MW units to achieve efficient excitation control.

Shenzhen Mawan Power Plant: Static excitation improves the response speed of the power grid and supports static excitation.

Fault case: A power plant tripped due to overexcitation due to slow melting of TV primary fuse, which was later solved by replacing spare parts and optimizing the protocol. ABB 3BHE032025R0101 PCD235 A101 Exciter Control Module