L100 Inverter

vii

CAUTION: Fasten the screws with the specified fastening torque

......... 2–15

(see the following table). Check for any loosening of screws. Other-

 

wise, there is the danger of fire.

 

CAUTION: Remarks for using earth leakage circuit breakers in the

......... 2–15

mains supply: Frequency inverters with CE-filters (RFI-filter) and

 

shielded (screened) motor cables have a higher leakage current

 

toward Earth GND. Especially at the moment of switching on this

 

can cause inadvertent tripping of earth leakage circuit breakers.

 

Because of the rectifier on the input side of the inverter there is the

 

possibility to stall the switch-off function through small amounts of

 

DC current. Please observe the following: • Use only short time-

 

invariant and pulse current-sensitive earth leakage circuit breakers

 

with higher trigger current. • Other components should be secured

 

with separate earth leakage circuit breakers. • Earth leakage circuit

 

breakers in the power input wiring of an inverter are not an absolute

 

protection against electric shock by direct touching.

 

CAUTION: Be sure to install a fuse in the wire for each phase of

......... 2–15

the main power supply to the inverter. Otherwise, there is the

 

danger of fire.

 

CAUTION: For motor leads, earth leakage breakers and electro-

......... 2–15

magnetic contactors, be sure to size these components properly

 

(each must have the capacity for rated current and voltage). Other-

 

wise, there is the danger of fire.

 

Powerup Test Caution Messages

CAUTION: The heat sink fins will have a high temperature. Be

......... 2–17

careful not to touch them. Otherwise, there is the danger of getting

 

burned.

 

CAUTION: The operation of the inverter can be easily changed

......... 2–17

from low speed to high speed. Be sure check the capability and

 

limitations of the motor and machine before operating the inverter.

 

Otherwise, there is the danger of injury.

 

CAUTION: If you operate a motor at a frequency higher than the

......... 2–18

inverter standard default setting (50Hz/60Hz), be sure to check the

 

motor and machine specifications with the respective manufacturer.

 

Only operate the motor at elevated frequencies after getting their

 

approval. Otherwise, there is the danger of equipment damage.

 

CAUTION: Check the following before and during the powerup

......... 2–18

test. Otherwise, there is the danger of equipment damage. • Is the

 

shorting bar between the +1 and + terminals installed? DO NOT

 

power or operate the inverter if the jumper is removed. • Is the

 

direction of the motor correct? • Did the inverter trip during acceler- ation or deceleration? • Were the rpm and frequency meter readings as expected? • Were there any abnormal motor vibrations or noise?

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Hitachi L100 instruction manual Vii, Powerup Test Caution Messages
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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.
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