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EP426E EP 24/1250-31.5E


EP426E EP 24/1250-31.5E


Leveraging on the expertise of a dedicated team of employees, we bring forth the finest quality Indoor Embedded Poles to the clients at the market leading prices. The Indoor Embedded Poles, which we supply and export, are appreciated for their unmatched electrical endurance. Moreover, the Indoor Embedded Poles are preferred due to their excellent mechanical and electrical life.

Electrical Ratings (3Phase) Symmetrical Basis
Rated Frequency 50/60Hz
Rated Maximum Line to Line Voltage 24kV,r.m.s
Rated Power Frequency Withstand Voltage:Air 79kV,r.m.s
Rated Impulse Withstand Voltage:Air 125kV,Peak
Rated Normal Current 1250A
Rated Short- Circuit Current ( 3 Phase Symmetrical Basis) 31.5kA,r.m.s
Percentage D.C. Component of Rated S.C. Breaking Current 50.00%
Rated Short-Circuit Making Current 80kA,Peak
Rated Duration of Short Time Current 4s
Rated Short-Time Withstand Current 31.5kA,r.m.s
Rated Peak Withstand Current 80kA,r.m.s
*Maximum Contact Resistance at Minimum Closing Force 25Micro ohms
*Rated Breaking Current of Single Capacitor Bank 630A,r.m.s
*Rated Breaking Current of Back-to-Back Capacitor Bank 400A,r.m.s
Rated operating sequence o-0.3s-co-180s-co
Mechanical Data
Closing Force due to Bellow and Atmospheric 120±50N
Force Required to Hold Contacts open at Full Stroke 160±90N
Mechanical Requirements (Ref. Vcb)
Contact Stroke 13±1 mm
Opening Speed(average of 75 contact gap) 1.5±0.2m/Sec
Maximum Overtravel During Opening 2mm
Maximun Rebound During Opening 2mm
Closing Speed(average of last 30% contact gap) 0.9±0.2m/Sec
Maximum Contact Bounse Duration(with maximum 2 bounces) ≤2ms
Rated Contact Compressive Force 3150±200N
Closing and Opening non-simultaneity of three-phase Contacts ≤2ms
Life (Estimated)
Electrical Life at Rated Normal Current 50,000 Operations
Electrical Life at Rated Short Circuit Current 100 Operations
Mechanical Life 50,000 Operations
Contact Erosion Limit 3mm
Shelf Life 20Years

Note
  • Meets or exceeds the electrical endurance requirements of class E2 for autoreclosing duty per IEC 62271-200 and JB 8738-2008.
  • * Rated Characteristics to be given on request



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