Diamondback Solid Dielectric Loadbreak Switch

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The Diamondback switch is a solid dielectric, three-phase load break switch for overhead applications. The Diamondback switch combines the time-proven reliability of vacuum bottles with the maintenance-free benefits of a solid dielectric insulated device. Diamondback is designed for three phase automatic or manual switching operations providing circuit isolation for systems rated up to 29.3 kV, 630A continuous current. The compact, light-weight design provides ease of installation. The Diamondback has been designed and tested to comply with the IEEE C37.74 and IEC 62271- 103 (formerly IEC 60265-1:1998) standards.

Features and Benefits
  • Field-proven Solid Dielectric Technology

  • Six Integral Voltage Sensors & Three Current Transformers

  • Compact, Light-weight

  • Maintenance-free; No Greenhouse Gas (SF6)

  • Smart Grid Ready

Electrical Ratings Chart for Diamondback Load Break Switch
Maximum Voltage 29.3kV
Continuous Current 630A
Frequency 50Hz/60Hz
Short-Time Current Withstand (rms, 3 sec) 12.5kA
Fault Making Current (peak, asym) 32.5kA,
Momentary Current (rms, asym) 20kA
Switching Performance Tested per IEEE C37.74-2014/IEC 62271-103 100% Load Current Switching 630A
50% Load Current Switching 315A
10% Load Current Switching 63A
Loop Current Switching 630A
100% Cable Charging Current Switching 25A
30% Cable Charging Current Switching 7.5A
Line Charging Current Switching 1.5A
Magnetizing Current Switching 22A
Mechanical Operations Switching Performance 5,000 times
Impulse Withstand Voltage (1.2×50µs) 150kV
Power Frequency Withstand Voltage (1 min) 60kV
Control Operating Voltage 120/220VAC
Weight 99 kg (218.3 lbs)