Chapter 4

Electrical Auxiliary Devices

Summary of Electrical Auxiliary Devices

The following table shows electrical auxiliary devices that can be added to devices. They can be installed on site. For more information, see the TeSys Motor Control and Protection Components Catalog.

Electrical auxiliary device	Use
OF auxiliary contact	View the on/off status of the device remotely.
SD auxiliary contact	View the trip status of the device remotely.
SDE auxiliary contact	Indicate that the device has tripped on a detected electrical fault.
AU undervoltage trip release	Trip the device when the control voltage drops below a tripping threshold.
AS shunt trip	Send an electrical trip command remotely to trip the device.
SDTAM thermal fault module	Provide alarm and detected fault differentiation.

Slots for Electrical Auxiliary Devices on TeSys GV5PB Devices

The following table shows the possible slots for electrical auxiliary devices mounted in the case.

OF1 auxiliary contact	●	—	—	—	—
Electrical auxiliary device	Slot
Electrical auxiliary device	A	B	C	D	E
OF2 auxiliary contact	—	—	—	●	—
SD auxiliary contact	—	●	—	—	—
SDE auxiliary contact (with addition of the optional SDE adapter)	—	—	●	—	—
AU undervoltage trip release	—	—	—	—	●
AS shunt trip	—	—	—	—	●
SDTAM thermal fault module	●	—	—	—	●

NOTE: It is not possible to install all the accessories at the same time in one device. For example, SDTAM thermal fault module uses the same slot as AU undervoltage trip release or AS shunt trip.

Slots for Electrical Auxiliary Devices on TeSys GV6PB Devices

The following table shows the possible slots for electrical auxiliary devices mounted in the case.

Electrical auxiliary device	Slot
Electrical auxiliary device	A	B	C	D	E	F	G	H
OF1 auxiliary contact	—	●	—	—	—	—	—	—
OF2 auxiliary contact	—	—	●	—	—	—	—	—
OF3 auxiliary contact	—	—	—	●	—	—	—	—
OF4 auxiliary contact	—	—	—	—	—	—	●	—
SD auxiliary contact	—	—	—	—	●	—	—	—
SDE auxiliary contact (with embedded SDE adapter)	—	—	—	—	—	●	—	—
AU undervoltage trip release	—	—	—	—	—	—	—	●
AS shunt trip	—	—	—	—	—	—	—	●
SDTAM thermal fault module	●	—	—	—	—	—	—	●

Operation of the Auxiliary Indication Contacts

The following table shows the position of the indication contacts (or outputs) relative to the position of the actuator and main contacts.

Name	Position of the actuator and the main contacts
	ON	Tripped by:						OFF
		AU/AS	PT PT: Push-to-trip*	Trip unit
		AU/AS	PT PT: Push-to-trip*	Ir Ir: Overload or thermal *	Isd Isd: Short-time protection*	li Ii: Instantaneous protection*	lunbal *
	Position of indication contacts
OF	●	—	—	—	—	—	—	—
SD	—	●	●	●	●	●	●	—
SDE	—	—	—	●	●	●	●	—
SDTAM - Output 1 (SDT thermal fault indication)	—	—	—	●●	—	—	●●	—
SDTAM - Output 2 (contactor control)	—	—	—	●●	—	—	●●	—
●: Contact closed, ●●: Early-make output (400–ms)

Indication Contacts

Introduction

Use indication contacts to view the status of the device remotely.

The indication contact provides either OF, SD, or SDE indication functions, depending on its location in the device.

Indication contacts are located under the front face of the device, in a compartment isolated from the power circuits.

Description

Name	Image	Definition
OF open/close indication contact		The OF contact indicates the position of the main contacts of the device (open or closed).
SD trip indication contact		The SD contact indicates that the device has tripped due to: Operation of the push-to-trip button Operation of the AU undervoltage trip release or AS shunt trip Overload or thermal protection Short-time protection Instantaneous protection Phase-unbalance protection
SDE contact		The SDE contact indicates that the device has tripped on a detected electrical fault due to: Overload or thermal protection Short-time protection Instantaneous protection Phase-unbalance protection

Name

Image

Definition

OF open/close indication contact

The OF contact indicates the position of the main contacts of the device (open or closed).

SD trip indication contact

The SD contact indicates that the device has tripped due to:

Operation of the push-to-trip button
Operation of the AU undervoltage trip release or AS shunt trip
Overload or thermal protection
Short-time protection
Instantaneous protection
Phase-unbalance protection

SDE contact

The SDE contact indicates that the device has tripped on a detected electrical fault due to:

Overload or thermal protection
Short-time protection
Instantaneous protection
Phase-unbalance protection

Characteristics

The contacts used for indication contacts are the common point changeover type.

NC Normally Closed contact

NO Normally Open contact

Operation of the Indication Contacts

The following figures show the position of the indication contacts for each position of the handle and main contacts.

Name	Contact number	Position of the handle and contacts
Handle position	—
Device status	—	OFF	ON	Tripped on a detected electrical fault	Tripped (by AU/AS or push-to-trip protection)
Main contact position	—	Open	Closed	Open	Open
OF auxiliary contact position	1–2	Closed	Open	Closed	Closed
OF auxiliary contact position	1–2	Open	Closed	Open	Open
SD auxiliary contact position	1– 2	Closed	Closed	Open	Open
SD auxiliary contact position	1– 4	Open	Open	Closed	Closed
SDE auxiliary contact position	1– 2	Open	Open	Closed	Open
SDE auxiliary contact position	1– 4	Closed	Closed	Open	Closed

Wiring Diagram

The diagram is shown with circuits de-energized, all devices open, connected, and charged, and relays in normal position.

Indication contacts	Description
OF4/OF3/OF2/OF1	Device ON/OFF indication contacts
SDE	Detected electrical fault trip indication contact (short-circuit, overload, phase-unbalance)
SD	Trip indication contact

Voltage Trip Releases

Introduction

The following voltage trip release auxiliaries are operated remotely by an electrical trip command:

AU undervoltage trip release
AS shunt trip

NOTE: It is recommended to test the operation of a voltage trip release at regular intervals, such as every six months.

Voltage trip release auxiliaries are installed in the case under the front face of the device.

Description to Voltage Trip Release

Name

Image

Description

AU undervoltage trip release

AU undervoltage trip release:

Trips the device when the voltage is less than 0.35 times the rated voltage of the release.

If the voltage is between 0.35 and 0.7 times the rated voltage of the release, tripping can occur but is not certain to occur.
If the voltage is above 0.7 times the rated voltage of the release, tripping cannot occur.

Allows the device to be closed again when the voltage reaches 0.85 times the rated voltage of the release.

Use this type of trip release for emergency stops.

AS shunt trip

AS shunt trip:

Trips the device when the voltage exceeds 0.7 times the rated voltage of the release.
Operates by impulse type control signals maintained for ≥ 20 ms.

Characteristics

The characteristics of voltage trip release auxiliaries comply with IEC/EN 60947-2 recommendations.

Wiring Diagram

The diagrams is shown with circuits de-energized, all devices open, connected, and charged, and relays in normal position.

AU	Undervoltage trip release
AS	Shunt trip

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:

Overload indication
Motor contactor control

Description

A	Output terminals
B	SDTAM thermal fault module
C	Operating mode adjustment dial

Installation

The slots used to install the SDTAM thermal fault module depend on the device.

TeSys GV5PB	TeSys GV6PB

The SDTAM thermal fault module uses the same slot as:

AU undervoltage trip release, AS shunt trip, or OF1 auxiliary contact in a TeSys GV5PB device.
AU undervoltage trip release or AS shunt trip in a TeSys GV6PB 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	Detected overload fault signal output. This output maintains its state until reset.
SD4	Contactor control output
KM1	LC1D or LC1F contactor
CA2	CA2, CAD, or Zelio-type control relay

Output Assignment

Output 1 (SD2/OUT1): normally open, indicates thermal faults.

Output 2 (SD4/OUT2): normally closed, opens the contactor KM.

Outputs are activated 400 ms before the device trips in the case of:

Overload or thermal protection
Phase-unbalance protection

Contactor Control

Contactor control by the output 2 signal (SD4/OUT2) optimizes continuity of service and provides the following additional benefits:

Lower risk of motor deterioration.
Activation of the output indicates that the application is not working normally. Abnormal operation is not the result of an anomaly or internal condition in the motor-feeder.
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.

NOTE: To control a contactor with a consumption exceeding 80 mA, it is necessary to provide a control relay.

Operating Modes


The SDTAM thermal fault module incorporates an auto-reset delay setting dial.

To return the outputs to their initial state following activation:

Manual (SDTAM dial in the OFF position) after canceling the module power supply.
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
Output 1	SDTAM detected overload fault signal output
Output 2	SDTAM contactor control output
KM1	Motor contactor
Q	TeSys GV5PB / GV6PB device