Fuji Electric Thailand Co.,Ltd.

26/01/2026

What are the three motor controller types: AC drive, soft starter and contactor?(2 of 2)

The three motor controller types—AC drive, soft starter, and contactor—are used to control electric motors but serve different purposes and operate differently. Here’s an overview of each:

- Comparison of Features

Feature AC Drive (VFD) Soft Starter Contactor
Speed Control Yes No No
Soft Start Yes Yes No
Energy Efficiency High (variable load) Moderate Low
Mechanical Stress Low Low (at start/stop) High
Cost High Moderate Low
Complexity High Moderate Low

- Choosing the Right Controller
Ø Use an AC Drive for applications requiring variable speed control and high energy efficiency.
Ø Choose a Soft Starter for applications needing reduced mechanical stress and inrush current but operating at a fixed speed.
Ø Opt for a Contactor in simple, on/off motor control scenarios where cost is a key factor, and there are no specific requirements for speed or stress reduction.

19/01/2026

What are the three motor controller types: AC drive, soft starter and contactor?(1 of 2)

The three motor controller types—AC drive, soft starter, and contactor—are used to control electric motors but serve different purposes and operate differently. Here’s an overview of each:

1. AC Drive (Variable Frequency Drive, or VFD)
- Purpose: Controls the speed and torque of an AC motor by varying the motor’s input voltage and frequency.

- How it Works:
Ø Converts incoming AC power to DC, then back to a variable AC output with adjustable voltage and frequency using Pulse Width Modulation (PWM).
Ø Allows precise control of motor speed and torque.

- Common Applications:
Ø HVAC systems (fans, pumps, chillers).
Ø Conveyors, mixers, and other equipment requiring variable speed operation.

- Advantages:
Ø Energy-efficient, especially in variable-load applications.
Ø Reduces mechanical stress by providing smooth acceleration and deceleration.
Ø Improves process control by enabling speed adjustment.

- Limitations:
Ø Higher initial cost.
Ø Requires more complex installation and maintenance compared to simpler controllers.

2. Soft Starter
- Purpose: Gradually starts and stops an AC motor by reducing the initial voltage applied, minimizing inrush current and mechanical stress.

- How it Works:
Ø Uses thyristors or silicon-controlled rectifiers (SCRs) to control the voltage applied to the motor during startup.
Ø Once the motor reaches full speed, the soft starter is bypassed, and the motor runs directly from the line.

- Common Applications:
Ø Pumps and compressors.
Ø Applications where reducing mechanical stress and voltage sags is critical.

- Advantages:
Ø Reduces wear and tear on motors and mechanical components.
Ø Lower cost than AC drives.
Ø Simple and reliable for fixed-speed applications.

- Limitations:
Ø Does not allow speed control (fixed-speed operation only).
Ø Limited ability to manage torque after startup.

3. Contactor
- Purpose: Acts as an on/off switch for electric motors or other high-power devices.

- How it Works:
Ø An electromagnetic coil is energized to close or open contacts, allowing or interrupting current flow to the motor.

- Common Applications:
Ø On/off motor control in simple systems.
Ø Lighting, heating, or other non-variable equipment control.

- Advantages:
Ø Simple and cost-effective.
Ø Robust and suitable for basic applications.

- Limitations:
Ø Does not provide soft start, speed control, or overload protection.
Ø High inrush currents during startup can cause mechanical and electrical stress.

12/01/2026

UPS vs. Generator: Understanding the Differences in Backup Power

Both UPS (Uninterruptible Power Supply) systems and generators provide backup power—but they serve very different purposes in terms of response time, power quality, and application. Understanding these differences is key to designing a resilient and efficient power protection system.

What is a UPS?
A UPS is an electronic device that provides instantaneous power to critical loads during a power disruption.

Key Features:
- Immediate response (0–10 milliseconds, often seamless)
- Typically uses batteries (or capacitors) to store energy
- Maintains power quality (voltage regulation, frequency stability)
- Operates for short durations—enough to ride through short outages or allow orderly shutdown/start of generators

Ideal For:
- Data centers
- Hospitals (for critical equipment)
- Industrial automation controls
- Telecommunications
- Any sensitive load requiring zero downtime

What is a Generator?
A generator is a mechanical engine-driven system that converts fuel (diesel, natural gas, etc.) into electricity.

Key Features:
- Starts up after a delay (typically 10–60 seconds)
- Provides extended backup power—can run for hours or days with sufficient fuel
- Requires maintenance, ventilation, and fuel management
- Does not condition power—needs ATS (Automatic Transfer Switch) and sometimes a UPS for critical loads

Ideal For:
- Commercial facilities
- Factories and warehouses
- Whole-building backup
- Long-duration outages

Comparison: UPS vs Generator

Feature UPS Generator
Response Time Instantaneous (milliseconds) Delayed (10–60 seconds typical)
Backup Duration Short (minutes to ~1 hour) Long (hours to days)
Power Source Batteries or flywheels Fuel (diesel, gas, etc.)
Power Conditioning Yes (filters, regulates power) No (may need additional equipment)
Maintenance Low (mainly battery checks) High (engine, fuel, oil, etc.)
Noise & Emissions Silent, no emissions Noisy, produces exhaust
Installation Needs Indoor, compact Requires space, exhaust, ventilation
Best Use Case Critical electronics Whole-facility or long outages

How They Work Together
In mission-critical environments, UPS and generator systems are often used together:
1. Power goes out
2. UPS immediately supplies power to critical systems
3. Generator starts within 10–60 seconds
4. Once stable, the load is transferred to the generator
5. UPS recharges and stands by for the next event

Summary
- UPS: Instant power, short-term, power quality = best for sensitive equipment
- Generator: Delayed power, long-term, bulk energy = best for extended outages

05/01/2026

THE MAIN DIFFERENCE BETWEEN a 3-pole and a 4-pole circuit breaker lies in the number of conductors they switch and how they handle the neutral line in addition to the phases.

3-Pole Breaker

What it does:
• Designed to interrupt three-phase power: L1, L2, and L3.
• All three phases are switched simultaneously.

Common Applications:
• Three-phase motors and equipment
• Industrial and commercial systems
• Where neutral doesn’t need switching

Notes:
• Neutral (if present) is not interrupted by the breaker.
• Typically used where the neutral is grounded or managed separately.


4-Pole Breaker

What it does:
• Switches three phases (L1, L2, L3) plus the neutral conductor.
• All four poles trip together.

Common Applications:
• Unbalanced three-phase loads with a neutral (e.g., mixed 3-phase + single-phase)
• Systems where neutral switching is required for safety or isolation
• TN-S, TT, and IT power distribution systems
• Generators, UPS systems, and sensitive equipment

Notes:
• Allows complete isolation of all conductors, including neutral.
• Reduces risk of potential differences or stray currents on neutral during maintenance.

Key Differences at a Glance

Feature 3-Pole Breaker 4-Pole Breaker

Phases Switched 3 (L1, L2, L3) 3 (L1, L2, L3) + Neutral
Neutral Handling Passes through or external Switched with the phases
Application Type Balanced loads, motors Mixed loads, sensitive equipment
Isolation Capability Phase only Full (phases + neutral)
Cost & Size Smaller, less expensive Larger, more expensive

Summary
• Use a 3-pole breaker for standard three-phase systems where neutral switching is not required.
• Use a 4-pole breaker when full isolation—including the neutral—is necessary, especially in systems where the neutral may carry current or needs disconnection for safety and system integrity.

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22/12/2025

Season’s Greetings! 🥳🥳🥳🥳🥳
We wish you a Christmas and a successful New Year 2026.

Thank you for your continued support

15/12/2025

BIG STEP DEVELOPMENT FOR HYDROGEN FUEL CELL BY 2 JAPANESE GIANTS TO ACHIVE BIG STEP TO CLEAN ENERGY!!!!!!

August 1, 2025, Fuji Electric and Mitsubishi Gas Chemical have begun a joint study toward a demonstration of an integrated power system combining hydrogen fuel cells with methanol-based hydrogen generators.

Hydrogen fuel cells are clean—but storage and transport are challenging. This project addresses that by using methanol as a hydrogen carrier for on‑site power generation.

What’s new:

• Methanol is liquid at room temperature and holds ~6× more hydrogen molecules than 20 MPa compressed H2.
• Demo planned for March 2027; commercialization to follow.
• Target use cases: clean backup for data centers and factories, plus peak‑load shaving.
• Using green methanol via MGC’s Carbopath™ to reduce net CO2 emissions and accelerate GX.

Why it matters:

• Simplifies hydrogen logistics challenges while maintaining low‑carbon power.
• A practical bridge to scale hydrogen applications today.

▼ Learn more
•Hydrogen Fuel Cell System: www.fujielectric.com/products/energy/fuelcell/product_series/hydrogen.html?utm_source=Facebook&utm_medium=social&utm_campaign=251202&fbclid=IwY2xjawOo_f9leHRuA2FlbQIxMABicmlkETFldWtMVUwxN1Z2ekgyM09Qc3J0YwZhcHBfaWQQMjIyMDM5MTc4ODIwMDg5MgABHiwCqlfeNX9gehreELwJsMwMhcQkNb-_KvImgi8HqtPAd7O5k76wSTHSfD56_aem_DpSLg2XYjtmqcYgNwK4LwQ

•News release: www.fujielectric.com/about/news/detail/__icsFiles/afieldfile/2025/08/07/20250801E.pdf?utm_source=Facebook&utm_medium=social&utm_campaign=251202&fbclid=IwY2xjawOo_idleHRuA2FlbQIxMABicmlkETFldWtMVUwxN1Z2ekgyM09Qc3J0YwZhcHBfaWQQMjIyMDM5MTc4ODIwMDg5MgABHoL76ma5K-2zDFt6uad5LBtaUV-t0qyYwP1GoKNhXs5JEe3_S3qVvxqOcgyy_aem_f0lWnciQgeJ_fqrtmLlacw

08/12/2025

What are N+1, 2N, and 2(N+1) redundancy?

N+1, 2N, and 2(N+1) redundancy are configurations used to improve the reliability and availability of systems, particularly in critical power and infrastructure applications like data centers, hospitals, and industrial operations. Here’s an explanation of each:

1. N+1 Redundancy
• Definition:
• The system has N units to handle the full load, plus 1 additional (spare) unit for redundancy.
• If one component fails, the spare unit takes over, ensuring uninterrupted operation.

• Example:
• A UPS system with a load requirement of 100 kW has two 100 kW UPS units (1 active + 1 spare).
• If one UPS fails, the remaining UPS can still handle the load.

• Benefits:
• Cost-effective redundancy for small-to-medium reliability needs.
• Handles single points of failure effectively.

• Limitations:
• If multiple failures occur simultaneously, the system may fail.

• Applications:
• Small data centers, critical HVAC systems, or backup power for single facilities.

2. 2N Redundancy
• Definition:
• The system has two completely independent sets of N components, each capable of handling the full load.
• One system operates while the other remains on standby or operates in parallel.

• Example:
• For a 200 kW load, there are two independent systems, each with a 200 kW capacity.
• If one system fails, the other system can handle the entire load without interruption.

• Benefits:
• Provides 100% redundancy, ensuring high reliability.
• Protects against multiple points of failure and maintenance downtime.

• Limitations:
• More expensive due to the duplication of infrastructure.
• Requires more physical space and energy to operate and maintain.

• Applications:
• Large data centers, hospitals, and critical facilities with zero tolerance for downtime.

3. 2(N+1) Redundancy
• Definition:
• Combines the features of 2N and N+1 redundancy by having two independent systems, each with N+1 components.
• This setup offers additional resilience by ensuring each independent system has a spare unit.

• Example:
• For a 200 kW load : Two independent systems are installed.
• Each system has 200 kW capacity plus one spare unit (e.g., 3×100 kW UPS units in each system).

• Benefits:
• The highest level of redundancy, capable of handling multiple simultaneous failures.
• Maintenance or repairs can occur without impacting system availability.

• Limitations:
• Significantly higher cost due to over-provisioning.
• Requires more physical space and infrastructure resources.

• Applications:
• Mission-critical operations like banking systems, telecom networks, or large-scale cloud data centers where downtime is unacceptable.

How to Choose the Right Redundancy?

• N+1: Cost-effective for smaller setups where downtime risk is low.
• 2N: Ideal for facilities requiring very high uptime and can justify the cost.
• 2(N+1): The ultimate choice for mission-critical systems where multiple failures or maintenance should not impact operations.

By balancing cost, risk tolerance, and operational needs, you can select the redundancy configuration that best suits your application.

01/12/2025

Want to visualize your factory's liquid management without cutting pipes?

Fuji Electric's Integral Ultrasonic Flowmeter S-Flow features a clamp-on design for easy retrofitting. Its space-saving integrated detector and transducer design supports RS-485 communication, contributing to energy savings by visualizing flow rates all the way to the end of the pipeline.

Based on 50 years of ultrasonic technology, the time-of-flight method and easy-to-read LED display enable intuitive confirmation of flow rate.
Compatible with small-diameter piping (8A to 50A). Measures a wide range of liquids, including pure water, chemicals, and oil, in both metal and plastic pipes. Ideal for semiconductor manufacturing lines, building air conditioning systems, and cooling water monitoring in data centers.

Don't miss out on transforming your factory's efficiency! Watch this video( https://youtu.be/v73DRouiqbg?si=212YnDp8ZbgaYFtt ) to discover how the S-Flow Integral Ultrasonic Flowmeter can simplify liquid management, save energy, and streamline installation—no pipe cutting required.

►Product Details Here:
https://www.fujielectric.com/products/sensors_measurements/instruments/product_detail/flow_ultra_fsz.html?utm_source=YouTube&utm_medium=social&utm_campaign=251110_2

Want to visualize your factory's liquid management without cutting pipes?Fuji Electric's Integral Ultrasonic Flowmeter S-Flow features a clamp-on design for ...

24/11/2025

The Benefits of LOTO and the Different Types
Lockout/Tagout (LOTO) is a critical safety procedure used to ensure that electrical equipment—such as circuit breakers—is completely de-energized during maintenance or repair. LOTO helps prevent unexpected energization, protecting workers from electrical shock, arc flash, or equipment damage.

Benefits of LOTO for Circuit Breakers
1. Worker Safety: Prevents accidental energization while someone is servicing electrical systems.
2. Regulatory Compliance: Required by OSHA (29 CFR 1910.147) and other safety standards.
3. Reduces Downtime from Accidents: Fewer injuries and incidents lead to improved operational continuity.
4. Prevents Equipment Damage: Ensures that machinery isn’t restarted during disassembly or inspection.
5. Clear Communication: Tagout labels inform all personnel that work is in progress and power must not be restored.

Types of LOTO Devices for Circuit Breakers
LOTO devices vary depending on breaker design (toggle, molded case, miniature, etc.) and installation type (panel-mounted vs. DIN-rail). Here are the main categories:
1. Clamp-On or Clamp-Type Breaker Lockouts
· Used for standard toggle breakers
· Attaches to the breaker switch and clamps it in the OFF position
· Often secured with a padlock
Common for residential and light commercial breakers

2. Snap-On Breaker Lockouts
· Designed to snap directly onto the breaker toggle
· Usually fit specific breaker brands or styles
· No tools required for installation
Fast deployment for commonly used single-pole breakers

3. Universal Breaker Lockouts
· Adjustable designs that work across multiple breaker types and brands
· Often use a thumbscrew or tool to secure onto the switch
Good for facilities with mixed breaker panels

4. Tie-Bar Lockouts
· Used for two- or three-pole breakers connected by a tie bar
· Prevents any switch in the group from being turned on
Ideal for multipole breakers in industrial settings

5. No-Hole Breaker Lockouts
· Attach to breakers that lack a toggle hole
· Uses a clamping mechanism or adhesive to stay in place
Useful for molded-case breakers or special designs

6. Panel Lockouts
· Lockable covers or hasps installed on breaker panel doors
· Prevents access to the breakers entirely
Extra protection when individual breaker lockouts aren’t feasible

LOTO Accessories
· Padlocks: Keyed or keyed-alike, often color-coded per worker
· Tags: Display who locked out the breaker, when, and why
· Hasps: Allow multiple locks to be placed by several workers
· Group Lockout Boxes: Centralize control when multiple breakers or workers are involved

Using the right type of breaker lockout device is essential for safety and compliance. Always match the device to the breaker’s size, brand, and pole configuration.

17/11/2025

Installation environment diagnosis services for electrical facility equipment

The reliability and service life of industrial information processing devices and control equipment in a substation are said to be dependent on the installation environment.

In recent years, the digitization of protection relays has been progressing, and substation equipment is seeing increasing use of electronic components and printed circuit boards. Due to environmental factors, concerns for such equipment include performance losses of electronic components, corrosion of printed circuit boards, and silver sulfide corrosion of control equipment and conductors. We will provide various proposals after performing a diagnosis on the installation environment to access the current state of the substation.

10/11/2025

Did you know that the cookies you enjoy every day are produced with consistent quality thanks to our technology?

Our inverters precisely control motor speeds across various processes – from mixing dough and molding cookies to running conveyors, operating ovens, packaging, and even automated handling. This ensures uniform product quality and supports efficient production on every line.

▼ Learn more about our inverters here
https://www.fujielectric.com/products/drives_inverters/...

03/11/2025

Do you want faster and more powerful acquisition and analysis of plant and equipment data??

Package software f(s)NISDAS, the ideal solution for diverse uses such as startup, operation monitoring, and maintenance of production equipment.

f(s)NISDAS is a software package which runs on a personal computer, and acquires and analyzes the data of a programmable logic controller (PLC), inverter, etc. ( https://youtu.be/60oQeIyj7H8?si=JvniYF19nArqkJTA )

5 KEY FEATURES :

1. Sophisticated system monitoring〜 high-speed, synchronous and voluminous 〜
• “1 ms” sampling data acquisition achieved via PLC (our MICREX-SX)
• Recording of continuous data for three months or longer(The recording period is not guaranteed, and depends on the settings and measurement data, as well as the PC specification.)
• Data acquisition from multiple PLC units, inverter, etc. with a single personal computer

2. Enriched system analysis 〜 efficient utilization 〜
• Data analyzed simultaneously with data acquisition
• Data can also be analyzed after acquisition
• Conversion to a file format compatible with commercially available software

3. Simplified operation 〜 easier to use〜
• Simple operation method

4. Simple installation and high extendibility 〜 more simplification 〜
• Connectable to open network
• Able to construction of client/server system
• Easily installable in an existing system
• Monitoring of MICREX-SX series is readily available

5. Support 〜 timely provided〜
• We provide strong set-up support.

For more information, please visit our website www.fujielectric.com/products/factory_automation/

Fuji Electric’s f(s)NISDAS is a high-precision monitoring and control system that collects and analyzes production equipment data with millisecond resolution...