Hitachi L2002 Manual Do Utilizador

L200

2

 Inverter

Conf

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Dr
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The thermal overload detection protects the 
inverter and motor from overheating due to 
an excessive load. It uses a current/inverse 
time curve to determine the trip point.

First, use B013 to select the torque charac-
teristic that matches your load. This allows 
the inverter to utilize the best thermal 
overload characteristic for your application.

The torque developed in a motor is directly 
proportional to the current in the windings, 
which is also proportional to the heat generated (and temperature, over time). Therefore, 
you must set the thermal overload threshold in terms of current (amperes) for parameter 
B012. The range is 20% to 120% of the rated current for each inverter model. If the 
current exceeds the level you specify, the inverter will trip and log an event (error E05) in 
the history table. The inverter turns the motor output OFF when tripped. Separate 
settings are available for the second motor (if applicable) as shown in the following 
table.

Output frequency

Constant torque

Reduced

torque

B013 = 01

B013 = 00

Torque

5

20

60

120

Hz

100%

80%

60%

0

B012 Level of electronic 

thermal setting

Set a level between 20% and 
120% for the rated inverter 
current.

✘ ✔

Rated current 

for each inverter 

model *1

A

E-THM LVL001.60A

B212 Level of electronic 

thermal setting, 2nd 
motor

Set a level between 20% and 
120% for the rated inverter 
current.

✘ ✔

Rated current 

for each inverter 

model *1

A

2ETHM LVL 01.60A

B013 Electronic thermal 

characteristic

Select from two curves, option 
codes:
00 .. Reduced torque 1
01 .. Constant torque
02 .. Reduced torque 2

✘ ✔

01

01

—

E-THM CHAR  CRT

B213 Electronic thermal 

characteristic, 2nd 
motor

Select from two curves, option 
codes:
00 .. Reduced torque 1
01 .. Constant torque
02 .. Reduced torque 2

✘ ✔

01

01

—

2ETHM CHAR  CRT