Auxiliary and Alarm Indication Contacts
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Auxiliary Switch (OF) / Alarm Switch (SD). |
Indication contacts provide remote information
of the circuit breaker status and can thus be used for indications,
electrical interlocking, relays, etc.
They are 1A1B common point changeover type contacts, with a normally open (NO) contact and a normally closed (NC) contact.
Open/Closed - Auxiliary Switch (OF)
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Indicates the position of the circuit breaker contacts.
Trip Indication - Trip Alarm Switch (SD)
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Indicates that the circuit breaker has tripped due to:
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an electrical fault (overload, short circuit)
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the operation of a shunt trip or an undervoltage trip
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the “push-to-trip” button.
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The activation of the “push-to-trip” button resets when the circuit breaker is reset.
Electrical Characteristics of Indication Contacts
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Characteristics |
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|---|---|---|---|---|---|---|---|
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Rated thermal current (A) |
5 |
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Minimum load |
5 mA at 17 Vdc |
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|
Utilization Cat. (IEC 60947-5-1) |
AC12 |
AC15 |
DC12 |
DC13 |
DC14 |
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|
Operational current (A) |
24 Vac/Vdc |
5 |
5 |
5 |
2.5 |
1 |
|
|
48 Vac/Vdc |
5 |
5 |
2.5 |
1.2 |
0.2 |
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|
110–127 Vac / 110 Vdc |
5 |
4 |
0.6 |
0.35 |
0.05 |
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|
220/240 Vac |
5 |
3 |
— |
— |
— |
||
|
250 Vdc |
— |
— |
0.3 |
0.05 |
0.03 |
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|
380/440 Vac |
5 |
2.5 |
— |
— |
— |
||
|
660/690 Vac |
5 |
0.11 |
— |
— |
— |
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UL489, CSA C22.2 No. 5 |
Ampere Rating (A) |
Pilot Duty Standard (A)* |
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|
48 Vac |
5 |
— |
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|
120 Vac |
5 |
3 |
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|
240 Vac |
5 |
1.5 |
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|
480 Vac |
5 |
0.75 |
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|
600 Vac |
— |
0.6 |
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|
48 Vdc |
2.5 |
— |
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|
110 Vdc |
0.8 |
— |
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|
250 Vdc |
0.3 |
— |
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Auxiliary Switch (OF) and Alarm Switch (SD) Indication |
Installation and Connection
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The auxiliary switch (OF) and alarm switch (SD) indication contacts snap into cavities behind the front accessory cover of the circuit breaker and their presence is visible on the front face through green flags.
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One model serves for all indication functions depending on where it is installed in the circuit breaker.
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Each NO and NC spring terminal may be connected by one 0.5–1.5 mm² (20–16 AWG) stranded copper wire and by two wires for the common point. See Indication Contacts for indication contacts wiring diagrams.
PowerPact B Accessories Video –
Auxiliary Contacts Catalog Numbers
|
Auxiliary Contacts (Changeover) |
Factory Installed Suffix |
Field-Installable Kit Catalog Number |
|
|---|---|---|---|
|
Standard OF |
AA |
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|
Standard SD |
BC |
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Pre-wired OF |
AAYH |
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Pre-wired SD |
BCYH |
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Standards
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Indication contacts comply with UL 489, CSA C22.2 No. 5 and IEC 60947-5-1 Standards.
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Indication contacts have also been tested according IEC 60 947-5-4 standard.
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Indication contacts are Listed for field installation per UL file E103955 and Certified under CSA file 177007.