Indication Contacts
Introduction
One indicator contact model provides OF, SD, SDE, and SDV indication functions. The position of the contact inside the case determines the function.
Indication contacts are either under the front face of the circuit breaker, under the motor mechanism, or in the rotary handle. Installation is in a compartment isolated from the power circuits. There are two types:
-
Standard contact with spring terminals
-
Low-level contact with screw terminals
For more information about installation, consult the instruction sheet on the Schneider Electric website: NNZ4314501 Indication Contacts
Standard and Low-Level Contacts
Standard and low-level contacts are the common point changeover type.
NC Normally Closed contact
NO Normally Open contact
The following table describes the operation of standard and low-level volt-free contacts:
|
Name |
Definition |
|---|---|
|
OF indication contact |
Changeover: The NO contact is normally open when the circuit breaker is in the O (OFF) position. |
|
SD indication contact |
Trip indication: The SD contact indicates that the circuit breaker has tripped due to:
|
|
SDE indication contact |
Electrical fault indication: The SDE contact indicates that the circuit breaker has tripped on an electrical fault due to:
|
|
SDV indication contact |
Earth-leakage fault indication: The SDV contact indicates that the circuit breaker has tripped due to an earth-leakage fault detected by the earth-leakage protection of the VigiPacT Add-on. NOTE: Use the SDx module
to indicate an earth-leakage fault detected by a MicroLogic 4 or 7 or MicroLogic 4 AL or 7 AL trip unit.
|