Test Functions
For devices tested in free air, information will be provided to indicate that the device is not evaluated for use in an individual enclosure.
Self Test Without Trip
 WARNING |
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UNINTENDED EQUIPMENT OPERATION
If the motor is connected to the contactor then there
will be possibility of starting the motor for few seconds.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
|
Press Reset button for 3 to 15 s to perform a self test without trip. When the button is released, the LTMT main unit LED will turn ON in pattern 1 for 1 s. After 1 s, the LTMT main unit LED will turn ON in pattern 2 for 1 s. After 2 s from the beginning of the test, LTMT main unit comes out of the test mode.
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LEDs |
Pattern 1 LED status |
Pattern 2 LED status |
|---|---|---|
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Device |
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Communication |
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Motor Status |
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Trip/Alarm |
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The graphical representation of self test mode without trip is shown below:
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A |
Self test mode without trip |
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B |
Reset button |
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C |
LEDs |
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D |
Pattern1 |
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E |
Pattern2 |
Self Test With Trip (If Motor is Stopped)
| WARNING |
|---|
|
UNINTENDED EQUIPMENT OPERATION
If the motor is connected to the contactor then there
will be possibility of starting the motor for few seconds.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
|
When a self test with trip command is received from LTMTCUF control operator unit or communication network or a digital input of the controller:
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The LTMT main unit LED will turn ON in pattern 1 for 1 s. After 1 s, the LTMT main unit LEDs will turn ON in pattern 2 for 1 s.
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The state of the trip digital output changes for 2 s.
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After 2 s from the beginning of the test, the LTMT main unit comes out of the test mode, and the state of the trip digital output will change.
|
LEDs |
Pattern 1 LED status |
Pattern 2 LED status |
|---|---|---|
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Device |
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Communication |
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Motor Status |
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Trip/Alarm |
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The graphical representation of self test mode with trip is shown below:
|
A |
Self test mode with trip |
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B |
Reset button |
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C |
LEDs |
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D |
Pattern1 |
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E |
Pattern2 |
Logic Test Mode
| WARNING |
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UNEXPECTED BEHAVIOUR OF EQUIPMENT
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
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The logic test function of the LTMT main unit can be used during commissioning of the motor. This function helps to check the wiring of the motor with LTMT main unit. Any one of the digital input of the LTMT main unit should be configured as logic test DI. The LTMT main unit enters into or exits from the logic test mode depending on the status of the logic test DI.
In logic test mode, the LTMT main unit allows you to start or stop the motor (contactors) to verify the wiring and bypass the following inhibit conditions:
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Thermal memory inhibit
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Max start inhibit
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Low voltage inhibit
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No voltage inhibit
In logic test mode, the LTMT main unit allows to reset the trip or auto resets the trip.
The LTMT main unit exits from the logic test mode in the following case:
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Voltage detected by LTMTCTV sensor module.
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Current detected by LTMTCT/LTMTCTV sensor module.
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Logic test DI status is OFF.
The logic test mode can be set up using following interfaces:
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A PC running the TeSys Tera DTM embedded in a FDT container such as SoMove software.
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The LTMTCUF control operator unit.
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A PLC or DCS through the communication network.