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Moulded Case Circuit Breaker (MCCB)

Moulded Case Circuit Breaker (MCCB)

Moulded Case Circuit Breakers

Advantage Electric Supply CA

Advantage Electric Supply CA

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CA
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510.324.9070

ARMS

ARMS

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866.211.1754

Automation Systems Interconnect (ASI) PA

Automation Systems Interconnect (ASI) PA

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PA
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877.650.5160

Beyond Components CA - Northern

Beyond Components CA - Northern

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CA, NV, OR and WA
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510.781.0680

Beyond Components CA - Southern

Beyond Components CA - Southern

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CA
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714.821.1516

Beyond Components CO

Beyond Components CO

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720.577.2497

Beyond Components CT

Beyond Components CT

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CT and NY
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203.269.9955

Beyond Components FL

Beyond Components FL

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407.977.2646

Beyond Components GA

Beyond Components GA

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678.494.2020

Beyond Components IA

Beyond Components IA

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319.373.2923

Beyond Components IL

Beyond Components IL

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847.438.4407

Beyond Components IN

Beyond Components IN

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317.788.4559

Beyond Components MA

Beyond Components MA

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800.971.4242

Beyond Components MI

Beyond Components MI

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248.926.0303

Beyond Components MN

Beyond Components MN

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651.405.6655

Beyond Components MO

Beyond Components MO

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314.344.0344

Beyond Components NY

Beyond Components NY

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585.328.1880

Beyond Components PA

Beyond Components PA

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DE, MD, NJ, PA and VA
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610.518.9511

Beyond Components TX

Beyond Components TX

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972.323.7900

Beyond Components TX

Beyond Components TX

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TX
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512.267.1811

Beyond Components WI

Beyond Components WI

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WI
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262.798.9810

Burns Controls Company TX

Burns Controls Company TX

Compass Made

Compass Made

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USA: West
USA: West
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(408) 209-1517

Crossroads Electronic Marketing Inc.

Crossroads Electronic Marketing Inc.

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AL, GA, MS, NC, SC and TN

Enertronics America SA de CV NL

Enertronics America SA de CV NL

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Mexico - Latin America
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+52 81 8363 3429

Fuses Unlimited CA

Fuses Unlimited CA

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CA
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510.651.8911

Fuses Unlimited Cleveland OH

Fuses Unlimited Cleveland OH

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440.238.1330

Fuses Unlimited Dallas TX

Fuses Unlimited Dallas TX

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972.907.8600

Fuses Unlimited HQ CA

Fuses Unlimited HQ CA

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800.255.1919

Fuses Unlimited OH

Fuses Unlimited OH

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440.238.1330

Fuses Unlimited West Sacramento CA

Fuses Unlimited West Sacramento CA

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510.651.8911

Headquarters TX

Headquarters TX

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TX
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713.941.1300

Hingham Bay Corporation MA

Hingham Bay Corporation MA

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508.697.3164

How does ambient temperature affect ratings?

How does ambient temperature affect ratings?

Answer

Moulded Case Circuit Breakers are influenced by the external environment.  The power rating will have to be adjusted when the Circuit Breaker is used outside these standard tolerances.

  1. Ambient temperature: between -5ºC ~ +40ºC
  2. Average ambient temperature per 24 hour period:  less than 35ºC
  3. Relative Humidity: between 45 ~ 85%
  4. Altitude:  less than 2000 m. 
  5. Excessive steam, oil steam, dust, salt and other corrosive environments.

Corrections for non-standard conditions

Refer to the attached catalogue

  • High Temperatures exceeding 40ºC: refer the current correction for each level of ambient temperature in the catalogue.
  • High humidity:  the electric strength or electric performance may be degraded. Use an anti-humidty agent. Long term humidity may corrode metal parts and prevent operation.
  • Low Temperatures: Conduction, switch, trip or short circuit isolation function normally at -20ºC.
  • Extreme cold: approximately -40ºC. Refer to derating curve/s: holds more load.
  • Dust: use a dust cover.
  • Excessive vibration: may cause a nuisance trip.
  • Periods of non-use: manually switch the load current on a regular basis.
  • Corrosive gas: use sealed protection.

International Manufacturing and Design

International Manufacturing and Design

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USA: Southeast
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864.968.0858

Kele & Associates TN

Kele & Associates TN

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TN
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877.826.9045

Lectro Components Sales IL

Lectro Components Sales IL

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USA: Midwest
USA: Midwest
Call: 
630.690.0520

Lectro Components Warehouse MI

Lectro Components Warehouse MI

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USA: Midwest
USA: Midwest

Liberty Electric Sales NY

Liberty Electric Sales NY

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Region: 
USA: East
USA: Northeast
Call: 
315.43.8100

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