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操作手册的修订说明

MOVITRAC® LTP-B/LTX, LTP-A, LTE-B

03/2013版本 20133561 / ZH

SEW-EURODRIVE—Driving the world

Revision – Information regarding UL 3

目录

1 提示 ...................................................................................................................................4

2 MOVITRAC® LTP-B/LTX ................................................................................................52.1 Thermal motor protection ......................................................................................5

3 MOVITRAC® LTP-A ........................................................................................................63.1 Thermal motor protection ......................................................................................6

4 MOVITRAC® LTE-B ........................................................................................................74.1 Thermal motor protection ......................................................................................7

1 示

4

1 提示

提示

下列变频器的操作手册在章节 “符合 UL规定的安装 ”中扩展此处列举的信息：

• MOVITRAC® LTP-B/LTX, 部件号 19440650 / ZH

• MOVITRAC® LTP-A, 部件号 16884817 / EN

• MOVITRAC® LTE-B, 部件号 20045565 / ZH

提示

按照 UL认证的规定，本手册所有的语言版本均以英文作为下列章节内容的标准语言。

提

Revision – Information regarding UL

2MOVITRAC® LTP-B/LTXThermal motor protection

2 MOVITRAC® LTP-B/LTX

2.1 Thermal motor protectionThermal motor overload protection shall be provided by one of the following means:

• NEC compliant installation of a motor temperature sensor, see also section "Motortemperature protection (TF/TH)" in the chapter "Electrical Installation" of the operatinginstructions.

• Using internal thermal motor overload protection according to NEC (National ElectricalCode, US). Thermal motor overload protection can be activated via parameter P4-17.

• Implementing external measures to ensure thermal motor overload protection accordingto NEC (National Electrical Code).

2.1.1 ParameterThe following additional parameter was added to MOVITRAC® LTP-B/LTX inverters toimplement internal thermal motor protection according to NEC:

• P4-17 Thermal motor protection according to NEC

• 0 / disabled

• 1 / enabled

2.1.2 Functional principleThe motor current is accumulated in an internal memory over the course of time. The invertergoes to fault state as soon as the thermal limit is exceeded (I.t-trP).

Once the output current of the inverter is less than the set rated motor current, the internalmemory is decremented depending on the output current.

• When P4-17 is disabled, thermal memory retention is reset upon shutdown or power loss.

• When P4-17 is enabled, thermal memory retention is maintained upon shutdown orpower loss.

INFORMATIONOnly the fuses mentioned in chapter "UL compliant installation" of the operatinginstructions shall be used for UL compliant installation.

Revision – Information regarding UL

5

3 OVITRAC® LTP-Ahermal motor protection

6

3 MOVITRAC® LTP-A

3.1 Thermal motor protectionMOVITRAC® LTP-A is not provided with internal thermal motor overload protectionaccording to NEC (National Electrical Code, US).

Thermal motor overload protection shall be provided by the following means:

• NEC compliant installation of a motor temperature sensor, see also chapter "Motortemperature protection (TF/TH)" in the operating instructions.

• Implementing external measures to ensure thermal motor overload protection accordingto NEC (National Electrical Code).

INFORMATIONOnly the fuses mentioned in chapter "UL compliant installation" of the operatinginstructions shall be used for UL compliant installation.

MT

Revision – Information regarding UL

4MOVITRAC® LTE-BThermal motor protection

4 MOVITRAC® LTE-B

4.1 Thermal motor protectionThermal motor overload protection shall be provided by one of the following means:

• NEC compliant installation of a motor temperature sensor, see also section "Motortemperature protection (TF/TH)" in the chapter "Electrical Installation" of the operatinginstructions.

• Using internal thermal motor overload protection according to NEC (National ElectricalCode, US). Thermal motor overload protection can be activated via parameter P41.

Note: This function is available with firmware 1.1 and later.

• Implementing external measures to ensure thermal motor overload protection accordingto NEC (National Electrical Code).

4.1.1 ParameterThe following additional parameter was added to MOVITRAC® LTE-B inverters to implementinternal thermal motor protection according to NEC:

• P41 Thermal motor protection according to NEC

• 0 / disabled

• 1 / enabled

4.1.2 Functional principleThe motor current is accumulated in an internal memory over the course of time. The invertergoes to fault state as soon as the thermal limit is exceeded (I.t-trP).

Once the output current of the inverter is less than the set rated motor current, the internalmemory is decremented depending on the output current.

• When P41 is disabled, thermal memory retention is reset upon shutdown or power loss.

• When P41 is enabled, thermal memory retention is maintained upon shutdown or powerloss.

INFORMATIONOnly the fuses mentioned in chapter "UL compliant installation" of the operatinginstructions shall be used for UL compliant installation.

Revision – Information regarding UL

7

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