SE-CS10 Series - Current Sensor

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The SE-CS10 series current transformers (CTs) are key components of the Littelfuse protection relay product line. Littelfuse SE-134C and SE-135 Ground-Fault Ground-Check Monitors are designed specifically for use with the SE-CS10 CTs. A Littelfuse SE-330 Neutral-Grounding-Resistor Monitor and a Littelfuse SE-701 Ground-Fault Monitor can also be equipped with the SE-CS10 series to achieve the desired ground-fault-trip settings. Littelfuse motor- and feeder-protection relays can also make use of the SE-CS10 series either to measure phase current or ground-fault current.

Access specifications, certifications, check availability and order parts below

Catalog #Weight (lbs/g)Inner Diameter inInside Diameter mmCompare
SE-CS10-2.50 Kg2.564
SE-CS10-40 Kg4.25108
SE-CS10-60 Kg6.31160
SE-CS10-80 Kg8.25210
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
SE-CS10-4 XFMR CURRENT 1000:5 4.25 ID SPECIAL RoHS No 01/29/2021 PbFree No 01/29/2021 CoC_RoHS9_SE-CS10-4_01-30-2021 REACH205_Declaration_with_Pb_SE-CS10-4_01-30-2021 Yes
01/29/2021
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dwg Littelfuse Protection Relays SE-CS10-X Dimensions

dwg Littelfuse Protection Relays SE-cs10r13 CAD Drawing

pdf icon TN CT-03 Locating Phase Conductors in a Zero-CT Window

An ideal window-type current transformer responds only to the sum of the currents fl owing through its window...

pdf icon TN CT-04 Hammond CTs

pdf icon TN CT-06 CT Turns Ratio Modification

A window-type current transformer is also referred to as a core-balance or fl ux-balance transformer...

pdf icon TN CT-08 Ground-Fault Current Transformer Location

A ground fault on a grounded system can be detected using a current-sensitive ground-fault monitor...

pdf icon TN CT-09 Sensitive Ground-Fault Protection Using Split-Core CTs

A zero-sequence CT is optimized by using a symmetrical core and windings that are evenly spaced around the core. The symmetry allows the CT to operate in the presence of high load currents...

pdf icon TN CT-10 CT and PT Polarity Testing

Correct operation of MPS and FPS relays depends on accurate polarity. Markings on current transformers (CT) and potential transformers (PT) have been occasionally misapplied from the factory...

pdf icon TN CT-11 FPL Zero-Sequence Sensors with Littelfuse Relays

pdf icon Protection Relays and Controls Catalog - Mandarin

pdf icon SE CS10 Datasheet