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RMU (Ring Main Unit)

HomeRMU (Ring Main Unit)
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We’re ALSTON , a broad energy trading company with a proud history.

Alston RM units are designed to supply reliable energy and protect electrical equipment in secondary distribution networks up to 36 kV.RMA units are the best solution for indoor/outdoor distribution substations

Potential applications for the system include secondary energy distribution, and the product is distinguished by its modern maintenance concept combined with extremely compact dimensions.

Ring Main Unit , type SFA-RM , 12 kV

Technical Specifications:
  • Gas insulated Ring Main Units
  • Rated voltage = 12 KV
  • Normal current = 630 A
  • Short circuit withstand current: up to 21 kA.
  • Short circuit duration: 3 sec
  • Power frequency Withstand voltage = 38 kV r.m.s
  • Lightning Impulse withstand voltage Up = 95 kV peak
  • Internal arc classification: A (FLR)
  • Degree of protection: IP41 for indoor / IP54 for outdoor
RMU (Ring Main Unit)
RMU (Ring Main Unit)

Ring Main Unit , type SFA-RM , 17.5 kV

Technical Specifications:
  • Gas insulated Ring Main Units
  • Rated voltage = 17.5 KV
  • Normal current = 630 A
  • Short circuit withstand current: up to 21 kA
  • Short circuit duration: 3 sec
  • Power frequency Withstand voltage = 38 kV r.m.s
  • Lightning Impulse withstand voltage Up = 95 kV peak
  • Internal arc classification: A (FLR)
  • Degree of protection: IP41 for indoor / IP54 for outdoor

Ring Main Unit , type SFA-RM , 36 kV

Technical Specifications:
  • Gas insulated Ring Main Units
  • Rated voltage = 36 KV
  • Normal current = 630 A
  • Short circuit withstand current: up to 25 kA.
  • Short circuit duration: 1 sec.
  • Power frequency Withstand voltage (common value) = 70 kV r.m.s
  • Power frequency Withstand voltage (across the isolating distance) = 80 kV r.m.s
  • Lightning Impulse withstand voltage (common value) = 170 kV peak
  • Lightning Impulse withstand voltage (across the isolating distance) = 200 kV peak
  • Internal arc classification: A (FLR)
  • Degree of protection: IP54 (indoor & outdoor applications)

 

RMU (Ring Main Unit)
RMU (Ring Main Unit)

SFA-RM Smart Ring Main Units

Technical Specifications:
  • Gas insulated Self-power RMU
  • Rated voltage = up to 36 KV
  • Normal current = 630 A
  • Short circuit withstand current: up to 25 kA.
  • Short circuit duration: 1 or 3 sec
  • Loss of service continuity category (LSC) LSC2A-PM
  • Internal arc classification: A (FLR)
  • Degree of protection: IP41 for indoor / IP54 for outdoor
  • Relative Humidity : 100%
  • 3G/4G Communication, VPN Security “IPsec”
  • Accurate Measurements for voltage and current in all switching elements

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    Alston Trading Company Pvt. Ltd is the leading company in exporting of Low Voltage, Medium Voltage Switchgear, Distribution Transformers and Cable Trays.

    OUR HAED OFFICE

    Plaza# 12A, 1st Floor, Agora Commercial, Eden City, DHA Phase 8, Lahore – Pakistan

    +92-42-37135826+92-42-37135827

    info@alston.com.pk

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