1. Product Overview

2. Main Parameters

3. Product Features

• Dual-mode Regulation: Supports automatic and manual regulation modes, realized by mode switch button.
• Parallel Operation Capability: Up to 3 regulators can operate in parallel, adopting the principle of minimum circulating current control.
• RS-488 Communication: Supports serial bus communication, enabling remote monitoring and data processing.
• Multiple Protection Functions: Equipped with voltage regulation function blocking, automatic/manual mode output protection, etc.
• Self-test Alarm Function: Automatically alarms when the secondary voltage deviates from the rated value by more than 25% or the auxiliary voltage is interrupted.
• Adjustable Delay: T1 and T2 delays can be set to fixed value or inverse time characteristic to adapt to different application scenarios.

4. Structure and Composition

4.1 Front Panel Layout

• Top: ABB brand logo and model name.
• Left Area: Power parameter setting area, including adjustments for frequency, rated current, rated voltage, etc.
• Middle Area: Three registers (U1, U2, U3) for storing configuration parameters.
• Right Area: Operation control area
  • Voltage Regulation Area: Includes buttons such as Ug/Un, ΔU, T1/T2 time setting, etc.
  • Current Regulation Area: Includes functions such as I>, U<, BLOCK, TCO, etc.
  • Mode Switch: Buttons such as RESET STEP, PROGRAM, AUT/MAN, PARALLEL, etc.

4.2 Core Modules

• Power Supply Module: Two specifications available: SPGU 240 A1 or SPGU 48 B2.
• Regulation Module: Responsible for voltage comparison and regulation calculation.
• I/O Module: Input and output interface processing.
• Motherboard: Core control unit.
• Bus Connection Module: SPA-ZC 100 for serial communication.

5. Application Fields

• Distribution Substations: Adjust the voltage of on-load tap changers of power transformers.
• Multi-transformer Parallel Operation Systems: Supports parallel operation of two or three transformers, and three regulation principles can be selected: voltage following, negative reactance or circulating current.
• Industrial Power Systems: Various industrial power distribution scenarios for maintaining voltage stability.
• Control Systems Requiring Remote Communication: Realize centralized management and remote monitoring through RS-488.

6. Installation and Maintenance

6.1 Installation Guidelines

• Installation Environment: Suitable for installation in control cabinets with compact design.
• Wiring Requirements:
  • Measurement phase voltage U12 connection.
  • Rise and fall output contact connection.
  • If line voltage compensation, minimum circulating current or overcurrent blocking function is required, measure one phase current and connect it to the IL1 terminal.
  • Select functions through software switches SGF2/6 and SGF2/7.
  • Auxiliary Power Supply Connection: The ground of the power module is connected to the regulator shell.

Company philosophy:

The company always adheres to the business philosophy of “integrity, efficiency, and win-win”, and serves every new and old customer with the attitude of “integrity service, customer first”.

With strong competitive products, large inventory, excellent quality, fast delivery time, and pre-sales consultation and service, we continue to provide products for our customers.

Professional operation of major automation modules, cards CPU、PLC、DCS， The distributed products are widely used in CNC mechanical metallurgy, petrochemicals, chemical engineering, paper printing, textile printing and dyeing, machinery, electronic manufacturing, automobile manufacturing, plastic machinery, electricity, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution, etc.