background image

Fuse Holder

Busbar

Molded Case Switch

200kA*

UL508 Manual

Motor Star

ter

5kA***

UL508 Switch

5kA***

Driv

es

5kA***

Contactors

5kA***

Receptacle

10kA

GFCI

Receptacle

2kA

10kA

5kA

Default

Value

Your

Value

Glossary of Terms

Industrial Control Panel - 

An assembly of a

systematic and standard arrangement of two or more

components such as motor controllers, overload relays,

fused disconnect switches, fuses, and circuit breakers

and related control devices such as pushbutton

stations, selector switches, timers, switches, and 

control relays with associated wiring, terminal blocks,

pilot lights and similar components.

Interrupting Rating - 

The highest current at rated

voltage that a device is intended to interrupt under

standard test conditions.

Short-Circuit Current Rating

– The prospective 

symmetrical fault current at a nominal voltage to which

an apparatus or system is able to be connected without

sustaining damage exceeding the defined acceptance

criteria

Control Circuit

– A circuit that carries the electric 

signals directing the performance of a controller, and

which does not carry the main power circuit. A control

circuit is, in most cases, limited to 15 amp.

Power Circuit

– Conductors and components of 

supply, branch, and feeder circuits, supplying main line

power to loads such as heaters, motors, lighting,

receptacles, power transformers, and appliances. 

Summary of Contents for Electronics Short-Circuit Current Rating

Page 1: ...Simplified Guide To Understanding Short Circuit Current Rating F I N D I T F I X I T F O R G E T I T ...

Page 2: ... How Is SCCR Determined For meter disconnect switches and motor controllers this withstand level or SCCR is often determined by product testing For assemblies the marking can be determined through product listing or by an approved method With the release of the UL508A Industrial Control Panel standard an industry method is now available Any method used whether UL508A or another approved method sho...

Page 3: ...d e d C a s e S w i t c h U L 9 8 F u s i b l e D i s c o n n e c t S w i t c h e s U L 4 8 9 C i r c u i t B r e a k e r s B r a n c h C i r c u i t F u s e s U L 9 8 N o n F u s i b l e D i s c o n n e c t S w i t c h e s P o w e r D i s t r i b u t i o n B l o c k s F u s e H o l d e r U L 9 8 F u s i b l e D i s c o n n e c t S w i t c h e s U L 4 8 9 C i r c u i t B r e a k e r s U L 9 8 F u ...

Page 4: ...h associated wiring terminal blocks pilot lights and similar components Interrupting Rating The highest current at rated voltage that a device is intended to interrupt under standard test conditions Short Circuit Current Rating The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding the defined accep...

Page 5: ...mbly short circuit current rating they can also provide enhancements to your design in the areas of flexibility of installation increased workplace safety and reliable protection through the life of your equipment These enhancements take care of the hassle associated with equipment with limited ratings so you can FORGET IT Benefits of Using Cooper Bussmann Current Limiting Fuses Straight Voltage R...

Page 6: ... or will call Customers pay only standard price for the circuit protection device rush freight charges and a modest emergency fee for this service Emergency and after hours orders should be placed through the Customer Satisfaction Team Call 8 00 a m 4 30 p m Central Time 636 527 3877 After hours 314 995 1342 Application Engineering Application Engineering assistance is available to all customers T...

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