DEIF SCM-1 Synchronous controller

DEIF SCM-1

It is a classic and reliable single-channel synchronous controller whose core value lies in automating the complex and precise generator paralleling process in a cost-effective manner.

1. Core Function & Positioning

• Primary Use: To automatically synchronize one generator set with another running generator set or with the mains power grid, and to manage load sharing after connection.

• Product Positioning: It is the basic model in DEIF’s synchronizing controller range, designed for simple and reliable synchronization applications. It is an ideal choice for small power plants, standby power systems, or marine electrical systems.

2. Key Features

• Single-Channel Design: Focused on controlling the synchronization process of one generator to a single common busbar (mains or another generator).

• Automatic Synchronization: Automatically detects voltage, frequency, and phase difference, and sends correction signals to the generator’s governor (controls frequency) and AVR (controls voltage) to meet the closing conditions.

• Precise Closing: Calculates and predicts the optimal closing moment, issuing a “close breaker” command just before the phase angle difference reaches zero, ensuring a smooth and shock-free connection.

• Load Sharing (Optional): After parallel operation, it can communicate with other generator controllers via an additional load-sharing module to achieve proportional active power distribution.

• Integrated Protection: Features built-in sync-check protection to prevent breaker closure if conditions are not met, ensuring system safety.

• Compact and Robust: Modular design with a small footprint, typically for panel mounting. Its construction complies with marine and industrial environmental standards, capable of withstanding vibration, shock, and a wide temperature range.

3. How It Works (Briefly)

The SCM-1 continuously compares the signals from two power sources:

1. Voltage: Compares the voltage of the incoming generator and the busbar. If the difference is too large, it sends a signal to the generator’s Automatic Voltage Regulator (AVR) to adjust the voltage.

2. Frequency & Phase: Compares the frequency and phase. It sends signals to the engine governor to fine-tune the engine speed, bringing the incoming generator’s frequency slightly above the busbar frequency (creating a “fast” condition).

3. Calculate Advance: Once the voltage and frequency differences are within permissible limits, it calculates the time required for the breaker to close. It issues the close command at the precise moment before the phase angle is zero, so the breaker’s main contacts close when the phase angle difference is actually zero.

4. Typical Applications

• Power Plants with Multiple Generator Sets: Used for synchronizing a new generator to already running sets.

• Standby Power Systems: When the main power fails, multiple standby generators need to start quickly and synchronize in parallel to pick up the load.

• Marine Power Systems: Onboard ships where multiple main generators or shaft generators need to operate in parallel for efficiency and redundancy.

• Mains Parallel Operation: In some applications, it can be used to synchronize a generator with the utility grid (ensuring compliance with grid codes is necessary).

5. Front Panel Indications (Typical Configuration)

The SCM-1 front panel typically features LED indicators to provide clear status information:

• SYNCHRONISING: Flashes during the synchronization process.

• BREAKER CLOSED: Illuminates when the close command has been issued and the breaker is closed.

• VOLTAGE MATCH: Illuminates when the voltage difference is within the allowed range.

• FREQUENCY MATCH: Illuminates when the frequency difference is within the allowed range.

• SYNC OK: Illuminates when all synchronization conditions are met and the unit is ready to close the breaker.

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Company Profile

Xingchuang Ronghe (Fuzhou) Electric Co., Ltd. is a company specializing in the sales and technical services of spare parts for the world’s top industrial automation systems. With our profound industry experience and stable supply channels, we provide domestic and foreign customers with original, authentic, complete models, and fast-delivered precision spare parts solutions. We are your reliable partner in ensuring production continuity and stability.

We specialize in distributing the following core brands and product lines:

ABB

•  Process Control: ABB DCS process control system full range of components.
• ABB FreeLance AC800F power modules: SA801F/SA811F/SD802F/SD812F, EI811F/ABB EI812F/ABB EI813F, etc.
• ABB S800 analog I/O modules: AI801/AI810/AI825/AO801/AO845/AO895
• ABB S800 digital I/O modules: DI801/DI810/DO801/DO810

Bently Nevada
3500 Module Mainboards: 3500/42, 3500/45, 3500/40, 3500/50, etc.
(CPU Modules): 3200/32, 3500/25
3500 Module Minimum Cards: 128229-01, 128229-01, 133442-01, 125800-01, 167699-02, etc.
Extension Cables: 330850-50-05 (for preamplifier), 330730-040-00-00, 330103-00-06-10-02-00, etc.

EPRO

•  MMS6000 TSI System: MMS6110/MMS6210/MMS6220 series monitoring modules.
  Sensors: Proximitor sensors CON011, CON021, CON031, etc

GE

• PLC Systems: IC693, IC695, and IC697 Series Modules.
• Drives and Protection: GE DRIVE SYSTEMS Series Inverters, SR Integrated Protection Frame Series.

Rexroth

• Drives and Motors: Full range of Rexroth servo drives and controllers; models include: servo motor 2AD160B-B0350R2-BS03-D2V1, MSK040C-0600-NN-M1-UP1-NSNN, etc.
• Rexroth communication boards and amplifier boards: MTS-P01.2-D2-B1-E1-NN-NN-FWEP, VT-VPCD-1-1X/V0/1-0-1, VT5006-17B, etc.

Siemens

· Process Instruments and Controllers: Siemens MOORE series, common models include: QLCDM024DCBAN, 39ACM24BEN, 39AC12T4V1, 16114-171, etc.
· Automation Systems: Full range of SIMATIC S5 PLCs, SIMATIC S7-400 CPU modules and expansion modules, Simatic C7 systems, and various Siemens touch screens.