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Moulded Case Circuit Breaker (MCCB)

Moulded Case Circuit Breaker (MCCB)

Moulded Case Circuit Breakers

Liberty Electric Sales NY

Liberty Electric Sales NY

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USA: East
USA: Northeast
Call: 
315.43.8100

Nu-Way Electronics IL

Nu-Way Electronics IL

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USA: Midwest
IL
Call: 
847.437.7120

Peerless Electronics FL

Peerless Electronics FL

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USA: East
FL
Call: 
407.249.1600

Peerless Electronics NY

Peerless Electronics NY

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North America
Call: 
800.285.2121

PICS PA

PICS PA

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USA: East
USA: Northeast
Call: 
610.644.7701

Powertech Controls Co NY

Powertech Controls Co NY

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USA: East
North America
Call: 
800.938.6678

Pueblo Wintronic CO

Pueblo Wintronic CO

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USA: West
Call: 
719.542.1924

Rathsburg Associates IL

Rathsburg Associates IL

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AK, AL, IA, ID, IL, MI, MN, MO, MS, ND, NE, SD and WI
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630-625-5100

Rathsburg Associates MI

Rathsburg Associates MI

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USA: Midwest
IN, KY, MI, OH and PA
Call: 
248.615.5100

Relay Specialties NJ

Relay Specialties NJ

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USA: East
USA: East
Call: 
800.526.5376

Safe Circuits Inc (SCI): Master Distributor

Safe Circuits Inc (SCI): Master Distributor

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USA: East
North America and Latin America
Call: 
800.863.2134

Taylor Industrial Electronics WI

Taylor Industrial Electronics WI

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USA: Midwest
USA: Midwest
Call: 
414.365.6335

TCH (Headquarters) ON

TCH (Headquarters) ON

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Canada
Call: 
800 465 6281

TCH Alberta

TCH Alberta

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Canada
Call: 
855.460.5917

TCH New York

TCH New York

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USA: East
Call: 
800.465.6281

TCH Quebec

TCH Quebec

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Canada
Call: 
514.6977847

TCH Texas

TCH Texas

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USA: West
Call: 
972.556.9541

Technical Marketing Inc. (TMI)

Technical Marketing Inc. (TMI)

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AZ, CA, CO, ID, MT, NM, NV, OR, UT, WA and WY
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425.739.4600

UL489 Molded Case Circuit Breakers

Weidmuller CP

Weidmuller CP

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Mexico - Latin America

Weidmuller ON

Weidmuller ON

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Canada

Wes-Garde Components CA

Wes-Garde Components CA

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USA: West
AK, AZ, CA, HI, ID, MT, NV, OR, UT, WA and WY
Call: 
805.579.7200

Wes-Garde Components CT

Wes-Garde Components CT

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CT, MA, ME, NH, NY, RI and VT
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860.527.7705

Wes-Garde Components FL

Wes-Garde Components FL

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FL
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863.644.7564

Wes-Garde Components IL

Wes-Garde Components IL

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IL, IN, KY, MI, MN, ND, OH, SD, VA and WI
Call: 
630.231.3157

Wes-Garde Components MO

Wes-Garde Components MO

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USA: Midwest
IA, KS, MO and NE
Call: 
636.697.1870

Wes-Garde Components NC

Wes-Garde Components NC

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USA: East
NC
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Unmanned . sent to FL

Wes-Garde Components NJ

Wes-Garde Components NJ

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DE, MD, NJ, NY, PA, VA, Canada: East and Canada: West
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856.778.8190

Wes-Garde Components OH

Wes-Garde Components OH

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USA: Midwest
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Unmanned . sent to IL

Wes-Garde Components ON

Wes-Garde Components ON

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Canada
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Unmanned . sent to NJ

Wes-Garde Components TX

Wes-Garde Components TX

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USA: West
AR, CO, LA, NM, OK and TX
Call: 
972.465.0700

Western Switches & Controls, Inc (HQ) CA

Western Switches & Controls, Inc (HQ) CA

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USA: West
CA
Call: 
1-800-454-8144

Western Switches and Controls AZ

Western Switches and Controls AZ

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Region: 
USA: West
USA: West
Call: 
1-888-382-3888

What environmental conditions can affect MCCB efficiency?

What is an Under Voltage Release (UVT)

What is an Under Voltage Release (UVT)

Answer

The Under Voltage Release automatically opens a circuit breaker when voltage drops to a value ranging between 20% to 70% of the line Voltage.The operation is instantaneous, and after tripping, the circuit breaker cannot be re-closed again until the voltage returns to 85% of line voltage.

Continuously energized, the Under Voltage Release must be functioning before the circuit breaker can be closed. A CBI moulded case circuit breaker (MCCB) has the following characteristics.

  • Range of tripping voltage: 0.2 ~ 0.7 Vn
  • Reset and closing of a breaker is possible when the Control Voltage is over 0.85 Vn
  • Frequency (only AC): 45 Hz ~ 65 Hz

Why do I need a safety clearance?

Why do I need a safety clearance?

Answer

When a short circuit happens, the circuit breaker experiences high temperatures and high pressures. Safety clearances between the breaker, the panels, bars and other protection devices installed nearby, allow the pressure to be distributed and to prevent fire and arcing.

When installing a circuit breaker, safety clearances must be maintained. These safety clearances depend on the ultimate breaking capacity and are defined by tests carried out in accordance with standard IEC 60947-2.

Wistex II PA

Wistex II PA

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Region: 
USA: East
USA: East
Call: 
800.726.7307

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