SDTAM Thermal Fault Module
Introduction
Use the SDTAM thermal fault module to manage tripping due to overload.
The SDTAM thermal fault module receives data from the trip unit through an optical link and makes available two outputs assigned to:
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Overload indication
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Motor contactor control
Description
 |
A Output terminals B SDTAM thermal fault module C Operating mode adjustment dial |
Characteristics
The characteristics of the SDTAM thermal fault module outputs are:
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Voltage: 24–415 Vac/Vdc
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Current:
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Active outputs: 80 mA maximum
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Idle outputs: 0.25 mA
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Installation
The slots used to install the SDTAM thermal fault module depend on the device.
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TeSys GV5 |
TeSys GV6 |
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|
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The SDTAM thermal fault module uses the same slot as:
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MN/UVR undervoltage trip release, MX/SHT shunt trip, or OF1 auxiliary contact in a TeSys GV5 device.
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MN/UVR undervoltage trip release or MX/SHT shunt trip in a TeSys GV6 device.
Wiring diagram
Connect the SDTAM thermal fault module and the two outputs in strict accordance with the wiring diagram.
The diagram is shown with circuits de-energized, all devices open, connected and charged and relays in normal position.
|
Item |
Description |
|---|---|
|
SD1, SD3 |
Thermal fault module input power supply |
|
SD2 |
Overload fault signal output. This output maintains its state until reset. |
|
SD4 |
Contactor control output |
|
KM1 |
LC1D or LC1F contactor |
|
KA1 |
CA2 or CAD-type control relays |
Output Assignment
Output 1 (SD2/OUT1): normally open, indicates thermal faults.
Output 2 (SD4/OUT2): normally closed, opens the contactor KM1.
Outputs are activated 400 ms before the device trips in the case of:
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Overload or thermal protection
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Phase-unbalance protection
Contactor Control
Contactor control by the output 2 signal (SD4/OUT2) optimizes continuity of service and provides the following additional benefits:
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Lower risk of motor deterioration.
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Activation of the output indicates that the application is not working normally. Abnormal operation is not the result of an anomaly or internal fault in the motor-feeder.
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The cause of this abnormal operation can be temporary (for example, a voltage drop causing an overly long starting time).
When the cause of the overload or unbalance has disappeared, the equipment can be powered up again.
Operating Modes
The SDTAM thermal fault module incorporates an auto-reset delay setting dial.
To return the outputs to their initial state following activation:
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Manual (SDTAM dial in the OFF position) after canceling the module power supply.
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Automatic (SDTAM dial on one of the time delay adjustment settings) following a time delay (set from 1 to 15 minutes to allow for the motor cooling time).
|
Item |
Description |
|---|---|
|
I |
Motor current |
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Output 1 |
SDTAM overload fault signal output |
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Output 2 |
SDTAM contactor control output |
|
KM1 |
Motor contactor |
|
Q |
TeSys GV5 / GV6 device |