Outdoor Servo Electronic AC Voltage Stabilisers

IP54 / NEMA 3 style - Single & Three Phase - 3 to 1500 kVA

The OSES & OSESL ranges of AC Voltage Stabilisers are ideal for installation outdoors, or more challenging internal environments. Fundamentally they are our SES and SESL ranges of Servo Electronic Stabilisers presented in more robust NEMA 3 style enclosures.

With ingress protection to IP54, OSES & OSESL enclosures ensure complete protection against contact with internal electronic or electrical components & guard against harmful deposits of dust & water splashing against the casing from any direction.

With all the advanced controls & protection features found in our SES & SESL ranges, OSES & OSESL stabilisers also offer as standard the availability of protection against extremely high voltage surges and transients caused by lightning strikes on the utility supply line.

Common Features

  • Step-less Automatic Voltage Regulation
  • Constant Output Voltage, No Load to Full Load
  • Independent Phase Balancing & Control
  • Precise Output Voltage Regulation Accuracy (up to ± 0.5%)
  • Wide range of permissible Input Voltage windows (up to ± 40%)
  • Volt-free Remote Monitoring
  • Inbuilt Transient Voltage Surge & Spike Suppression
  • High Overload Capability
  • High Efficiency & Reliability
  • Extremely Low Maintenance
  • 3 Years Standard Warranty
  • Compliance with International Standards
  • CE Conformity

Specialised Features

  • Servo Electronic Design
  • IP54 Sheet Steel Enclosures
  • High Precision ± 0.5% Output Voltage Accuracy
  • Start Up Load Protection
  • Inbuilt Bypass Control

The Ranges

Series Phase Voltages  
OSES-H Series Single Phase 220V - 240V
OSES-H-2P Series Split Phase 220V - 240V
OSES-H-3P Series Three Phase 380V - 415V
Four Wire
OSES-HD-3P Series Three Phase 380V - 415V
Three Wire
OSES-LD-3P Series
Low Voltage
Three Phase 190V TO 240V
Three Wire
OSES-LY-3P Series
Low Voltage
Three Phase 190V - 220V
Four Wire
OSESL-H-3P Series
No Breakers
Three Phase 380V - 415V
Four Wire
OSESL-HD-3P Series
No Breakers
Three Phase 380V - 415V
Three Wire
Three Phase Models
Dimensions & Weight
Three Phase