L100 Inverter

3–23

Overload Restriction

When the inverter output current exceeds a preset current level you specify, the overload restriction feature arbitrarily reduces the output current. This feature does not generate an alarm or trip event. You can instruct the inverter to apply overload restriction only during constant speed, thus allowing higher currents for acceleration. Or, you may use the same threshold for both acceleration and constant speed.

Motor

restriction area

V

B22

 

Current

 

 

 

0

 

 

Output

 

frequency

 

B23

time

 

When the inverter detects an overload, it must decelerate the motor to reduce the current until it is less than the threshold. You can choose the rate of deceleration that the inverter uses to lower the output current.

 

“B” Function

Run-

Defaults

DOP,DRW,DOP+

 

 

 

 

 

 

 

Func.

Name

Description

time

EU/

Units

Func.

Name

Edit

Code

US

Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B21

Overload restriction

Select the operating mode

✘

01

—

F24

OLOAD

 

operation mode

during overload conditions,

 

 

 

 

MODE

 

 

three options, option codes:

 

 

 

 

 

 

 

00... Disabled

 

 

 

 

 

 

 

01... Enabled for acceleration

 

 

 

 

 

 

 

and constant speed

 

 

 

 

 

 

 

02... Enabled for constant

 

 

 

 

 

 

 

speed only

 

 

 

 

 

 

 

 

 

 

 

 

 

B22

Overload restriction

Sets the level for overload

✘

rated

A

F24

OLOAD

 

setting

restriction, between 50% and

 

Amps

 

 

LVL

 

 

150% of the rated current of

 

*1.25

 

 

 

 

 

the inverter, setting resolution

 

See

 

 

 

 

 

is 1% of rated current

 

*Note

 

 

 

 

 

 

 

 

 

 

 

B23

Deceleration rate at

Sets the deceleration rate when

✘

1.0

—

F24

OLOAD

 

overload restriction

inverter detects overload, range

 

 

 

 

CONST

 

 

is 0.1 to 30.0, resolution is 0.1.

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive Parameters

Configuring

 

 

NOTE: For inverter models 005NFE, 011NFE, and 030HFE, the thermal value is less than the rated amperes (is the same as models 004NFE, 007NFE, and 040HFE respec- tively). Therefore, be sure to set the electronic thermal overload according to the actual motor driven by the particular inverter.

Page 78 Page 80
Page 79
Image 79
Hitachi L100 instruction manual Overload Restriction, Oload, Const
Page 78 Page 80

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.
Top Page Image Contents