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) | |
