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Hitachi L100 Component Descriptions, AC Reactors, Input Side, AC Reactors, Output Side

Models: L100

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L100 Inverter

5–3

Component Descriptions

AC Reactors, Input Side

This is useful in suppressing harmonics induced on the power supply lines, or when the main power voltage imbalance exceeds 3% (and power source capacity is more than 500 kVA), or to smooth out line fluctuations. It also improves the power factor.

In the following cases for a general-purpose inverter, a large peak current flows on the main power supply side, and is able to destroy the inverter module:

•If the unbalanced factor of the power supply is 3% or higher

•If the power supply capacity is at least 10 times greater than the inverter capacity (the power supply capacity is 500 kVA or more)

•If abrupt power supply changes are expected

Examples of these situations include:

1.Several inverters are interconnected (input side) with a short bus.

2.A thyristor converter and an inverter are interconnected (input side) with a short bus.

3.An installed phase advance capacitor opens and closes.

Where these conditions exist or when the connected equipment must be highly reliable, install an AC reactor between the power supply and the inverter. Also, where the effects of an indirect lightning strike is possible, install a lightning conductor.

Example calculation:

VRS = 205V, VST = 203V, VTR = 197V,

where VRS is R-S line voltage, VST is S-T line voltage, VTR is T-R line voltage

Unbalance factor of voltage =

Max.-----------------------------------------------------------------------------------------------------------line voltage (min.) – Mean line voltage

⋅ 100

 

 

Meanline voltage

 

 

=

VRS – ( VRS + VST + VTR) ⁄ 3

⋅ 100 =

205 – 202

⋅ 100 = 1.5%

------------------------------------------------------------------( VRS

+ VST + VTR) ⁄ 3

-----------------------202

 

 

 

 

Please refer to the documentation that comes with the RF noise filter for installation instructions.

AC Reactors, Output Side

This reactor reduces the vibrations in the motor caused by the inverter’s switching waveforms, by smoothing the waveforms to approximate commercial power quality. It is also useful when wiring from the inverter to the motor is more than 10m in length, to reduce reflected voltage wave phenomenon. Please refer to the documentation that comes with the RF noise filter for installation instructions.

Accessories

Motor Control

 

 

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Hitachi L100 instruction manual Component Descriptions, AC Reactors, Input Side, AC Reactors, Output Side, Meanline voltage
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L100 specifications

The Hitachi L100 series is a versatile range of variable frequency drives (VFDs) designed to enhance performance in various industrial applications. Known for their reliability and efficiency, these drives are widely used in motors for pumps, fans, compressors, and conveyors.

One of the main features of the Hitachi L100 is its impressive control capabilities. The drive supports both scalar and vector control modes, allowing for precise speed and torque management. This flexibility ensures optimal motor performance across different load conditions. Additionally, the L100 series offers an impressive speed range, which can accommodate a wide variety of applications, from low-speed to high-speed requirements.

The L100 is equipped with built-in functionality for energy saving. By utilizing advanced control algorithms and auto-tuning features, the drive optimizes energy consumption, reducing operational costs and contributing to improved overall system efficiency. The energy-saving mode is particularly beneficial in applications where load conditions frequently change.

Another hallmark of the Hitachi L100 is its robust communication capabilities. The drive supports various communication protocols including Modbus and Ethernet, making it easy to integrate into existing control systems. This connectivity allows for real-time monitoring and diagnostics, which aids in predictive maintenance and minimizes downtime.

In terms of user-friendliness, the L100 series includes a clear, intuitive keypad that simplifies programming and operation. The drive also features a wide range of customizable parameters, enabling users to easily tailor the settings to suit specific application requirements. Additionally, the inclusion of a customizable PID controller allows users to refine process control automatically.

Safety is a priority in the design of the Hitachi L100. The drive comes with various built-in safety features such as overvoltage, overload, and short-circuit protection, ensuring reliable operation in challenging environments. Furthermore, it complies with global safety standards, making it suitable for international applications.

Lastly, the L100's compact design ensures easy installation and minimizes the space required in control cabinets. This is especially advantageous in facilities where space is at a premium. Overall, the Hitachi L100 series represents a combination of advanced technology, user-friendly features, and reliable performance, making it a popular choice for industrial automation solutions.