L2002 Inverter
Constant torque B013 = 01
Reduced
torque
B013 = 00
5 20 60 Output frequency

3–35

Electronic Thermal Overload Alarm Setting

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 characteristic that matches your load. This allows the inverter to utilize the best thermal overload characteristic for your application.

Torque

100%

80%

60%

0

Hz

120

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“B” Function

Run

 

Defaults

 

 

ParametersDrive

 

 

 

 

 

 

Mode

 

 

 

 

Configuring

Func.

Name /

 

 

 

–FE(F)

–FU

 

 

 

 

Description

Edit

Units

 

Code

SRW Display

 

Lo Hi

(EU)

(USA)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B012

Level of electronic

Set a level between 20% and

✘ ✔

Rated current

A

 

 

 

 

thermal setting

 

120% for the rated inverter

 

for each inverter

 

 

 

 

 

 

 

current.

 

model *1

 

 

 

 

 

E-THM LVL001.60A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B212

Level of electronic

Set a level between 20% and

✘ ✔

Rated current

A

 

 

 

 

thermal setting, 2nd

120% for the rated inverter

 

for each inverter

 

 

 

 

 

motor

 

current.

 

model *1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2ETHM LVL 01.60A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B013

Electronic thermal

Select from two curves, option

✘ ✔

01

01

—

 

 

 

 

characteristic

 

codes:

 

 

 

 

 

 

 

 

 

 

00

.. Reduced torque 1

 

 

 

 

 

 

 

 

E-THM CHAR

CRT

 

 

 

 

 

 

 

 

01

.. Constant torque

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

02

.. Reduced torque 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B213

Electronic thermal

Select from two curves, option

✘ ✔

01

01

—

 

 

 

 

characteristic, 2nd

codes:

 

 

 

 

 

 

 

 

motor

 

00

.. Reduced torque 1

 

 

 

 

 

 

 

 

 

 

01

.. Constant torque

 

 

 

 

 

 

 

 

2ETHM CHAR

CRT

 

 

 

 

 

 

 

 

02

.. Reduced torque 2