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Starters & Enclosed Products

Technical Tips & FAQs
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Starters & Enclosed Products
Technical Tips & FAQs
Tech Tips
    • Contactors
    • Contactors
    • Overload Protection
    • Overload Protection
    • Starters & Enclosed Products
    • Starters & Enclosed Products
    • Motor Controllers & MCCBs
    • Motor Controllers & MCCBs
    • Softstarters
    • Softstarters
    • Circuit Protection
    • Circuit Protection
    • Disconnect Switches
    • Disconnect Switches
    • Rotary Cam Switches
    • Rotary Cam Switches
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    • Control Relays & Timers
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    • Terminal Blocks
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    • Electrical Industry Codes
 
 
Sprecher & Schuh Series CAT7 starter with a CA7 contactor and a CEP7-1 overload relay
Basics For Selecting A Motor Starter

A Quick guide to the types and details of motor starters.

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Sprecher & Schuh Series CA9-400-EI contactor label closeup
Electronic Interface Functionality On CA9 Contactors

What is the ‘ EI ‘ electronic interface function? And – how does it work on the CA9 contactors?
Are there options to use / or not use the ‘ EI ‘ electronic interface functionality on the CA9 contactor?

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Pre-assembled or "build-from-stock" starters housed in a high impact, non-metallic, cUL approved, Type 1, 12, 4/4X enclosure
What Control Circuit Options Are Available On KWIKstarters?

What cover controls do KWIKstarters have? Why can’t I have an HOA or Pilot Light only on the larger KWIKstarters? What does the wire size have to do with the cover control options? What is the difference between remote control and without remote control? The cover control options for these compact starters vary depending on the KWIKstarter size and function. .

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Manual motor controllers UL tested and suitable for a variety of circuit control and protection needs
What Is The Replacement For KTA3-100 Motor Controllers?

I have a KTA3 in my multi-motor control panel. What is the replacement? What are the alternatives to KTA3 Motor Controllers? KTA3-25 controllers transitioned to KT4 or KT7 controllers. KTA3-100 controllers were replaced with KT7 controllers, but only up to 45 amps. .

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High efficient AC industion motor name plate from manufacturer
Troubleshooting Nuisance Tripping Of Molded Case Circuit Breakers

The increased use of high efficieny motors requires a closer look at specifications when applied to circuit protection methods. Not considering all of the factors can lead to specification errors and nuisance tripping or worse.

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Sprecher & Schuh cULus mark on a contactor label
Deciphering UL And CSA Certification Markings

The SCCR values for the CEP9-ESM Sensing modules can be found in the installation instructions included in the box. This is the manner in which UL requires the SCCRs to be specified.

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Advanced Solid State Overload Protection (direct or separate mounting)
SCCR Information For CEP9 Overload Relays

One of the outstanding features of IEC type overload relays is protection of three phase motors in the event of a single phase condition; otherwise known as “open phase” or “phase failure “ in one of the motor leads.

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Sprecher & Schuh example of what a single phase failure looks like on a 3-phase circuit
Inside Story On Phase Failure Protection

How do you select the right heater element for a fractional manual starter per continuous duty motor ratings?

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Selecting Fractional Manual Starter Heater Elements
Selecting Fractional Manual Starter Heater Elements

How do you select the right heater element for a fractional manual starter per continuous duty motor ratings?

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Motors attached to pumping equipment in a plant facility
The Big Motor And A Little Motor Rule

A little known rule of UL inspectors outlines what protection should be used in multi-motor starter panel applications.

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Sprecher & Schuh Series CRC7-280 surge suppressor mounted on contactor
Selecting Surge Suppressors

What is the purpose of a surge suppressor? What are the differences between the types of surge suppressors?

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Open or enclosed, combination starters include a means of disconnect in fusible, non-fusible, or molded case circuit breakers, up to 500 HP @ 460V
The Importance Of Primary Fuses In Enclosed Circuit Controllers

Most panels without control transformers are ordered without any “optional” control circuit fuse, which can leave the control circuit wiring unprotected.

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