xii

General Warnings and Cautions

CAUTION: EFFECTS OF DISTRIBUTOR LINES ON INVERTERS

Power source

EMI filter

R1 R2

S1 S2

T1 T2

Inverter

L1(L1) U

L2 V L3(N) W

U Motor Power source

V

W

Terminal EMI

for filter grounding

Noise

Remote operator

Inverter

Noise

Motor

Ground the

Piping frame. (to be grounded) or shielded wire

Completely ground the shield made of metal screen, enclosed panel, etc. with as short a wire as possible.

In the cases below involving a general-purpose inverter, a large peak current flows on the power supply side, sometimes destroying the converter module. Where such situations are foreseen, or the paired equipment must be highly reliable, install an AC reactor between the power supply and the inverter.

1.The unbalance factor of the power supply is 3% or higher.

2.The power supply capacity is at least 10 times greater than the inverter capacity (and the power supply capacity, 500 kVA or more).

3.Abrupt power supply changes are expected. Some examples include:

a.Several inverters are interconnected with a short bus.

b.A thyristor converter and an inverter are interconnected with a short bus. c:An installed phase advance capacitor opens and closes.

In cases (1), (2), and (3) we recommend installing an AC reactor of 3% (at a voltage drop at rated current) with respect to the supply voltage on the power supply side.

CAUTION: When the EEPROM error E8 occurs, be sure to confirm the setting value again.

CAUTION: When setting b contact to the forward or reverse command [FW], [RV] terminal, the inverter starts automatically. Do not set to b contact without a purpose.

General Caution

CAUTION: In all the illustrations in this manual, covers and safety devices are occasionally removed to describe the details. While operating the product, make sure that the covers and safety devices are placed as they were specified originally and operate it according to the instruction manual.

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Hitachi L100 instruction manual Xii, General Caution

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.