CSE Nex I 250

Features:



Numerical Feeder Protection Relay (Non Draw-out) 

CSE Nex I 250 is most well placed protection relay for MV / HT Swtichgear segment. its a perfect combination to latest technology and economic price that make it best seller.

Application : For Feeder Protection of MV / HT Systems.

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Brands:C&S Electric

Enquiry about CSE Nex I 250

Description

The CSE NEX I relays have been designed for controlling, protecting and monitoring industrial, utility distribution networks and substation. They can also be used as part of a protection scheme for feeders, transformers and generators.

KEY FEATURES
  • 1A & 5A Rated CT Input (Site Selectable)
  • Non -Draw out Design
  • DI/DO Programmable Matrix
  • Protection Blocking through DI
  • Fault Recorder
  • Event Recorder
  • Communication (USB & RS 485 on Modbus / IEC 103)
  • Self supervision function

 

Protection Functions

CSE Nex I 250 – A : 

  • IMDT / DEFT 3 Over Current protection (51)
  • Instantaneous Over Current High Set (50)
  • IMDT / DEFT Earth Fault protection (51N)
  • Instantaneous Over Current High Set (50N)
  • Circuit Breaker Failure Protection (50BF)
  • Harmonic Blocking (51H)
  • Cold Load Pickup (62CLD)
  • Trip Circuit Supervision (74TC)

CSE Nex I 250 – B : 

  • All the protection of Model CSE Nex I 250 – A  + 
  • Current Unbalance / NPS (46)
  • Broken Conductor (46BC)
  • Thermal over-load (49)

Hardware & HMI

  • Measures true RMS with DFT filter
  • 4 Current analog Inputs for phase & Earth Fault Current
  • 16 x 2 Alpha – Numeric LCD
  • 16 LEDs for Pickup & fault Annunciation
  • Auxiliary Supply:
    • H Model – 85V-280V AC / 90V-300V DC
    • W Model – 18 – 160V DC
  • DI -DO Selection
    • CSE NEX I 250 – A : 2 DI + 5 DO
    • CSE NEX I 250 – B : 6 DI + 6 DO

Standards

Test Reference Standards
Functional Test

Climatic Test

Temperature Dry Cold ( Relay operational)

Temperature Dry Cold ( Transportation & Storage)

Temperature Dry Heat (Relay operational)

Temperature Dry Heat ( Transportation & Storage)

Damp Heat Test (Relay operational)

Enclosure

Mechanical Test

Vibration Response

Shock Response with Stand Test

Bump

Seismic

Electrical Test

Insulation Resistance / Dielectric Test / High voltage Impulse

Voltage Dips Short Interruptions & Voltage Variations immunity

Ripple in DC Supply

Contact Performance Endurance Tests

Electro-magnetic Compatibility

Electrical fast Transient/ Burst

HF Disturbance Test

Electrostatic Discharge

Conducted Disturbance RF Field

Radiated RF E-M field Immunity Test

Surge Immunity Capacitively Coupled

Power Frequency Magnetic Field

Conducted & Radiated RF Interference Emission

Power Frequency Conducted Common Mode

 IEC 60255-6/5

 

IEC60068-2-1

IEC60068-2-1

IEC60068-2-2

IEC60068-2-2

IEC60068-2-3

IEC529

 

IEC 60255-21-1

IEC 60255-21-1

IEC 60255-21-1

IEC 60255-21-3

 

IEC60255-5

IEC 1000-4-11

IEC60255-11

IEC60255-14,15 / IEC60255-23

 

IEC60255-22-4 / IEC 60100-4-4

IEC60255-22-1

IEC60255-22-2 / IEC 61000-4-2

IEC61000-4-6 / IEC60255-22-6

IEC60255-22-3 / IEC 61000-4-3

IEC60255-22-5 / IEC 61000-4-5

IEC61000-4-8

EN55011 / IEC60255-25

IEC 1000-4-16 / IEC 60225-22-7

Dimensions

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