G&W 1-3-4-1 Diamondback Solid Dielectric Load Break Switch

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Distribution Reclosers and Overhead Switches

Diamondback® Solid Dielectric Loadbreak Switch

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

Configuration Details

Switch Applications

Switches play a fundamental role in improving distribution reliability. By applying Diamondback switches in strategic locations on the distribution system, faults can be isolated to minimize the outage area, loads can be distributed according to system conditions, critical loads can be kept on-line, individual protective devices or sections off-line can be bypassed during routine maintenance, and loads can be dropped to prevent overloading the source. In short, switches are typically used to reconfigure a distribution system to minimize outages and increase system reliability.

Manual Switching

By installing manually operated switches, a user can economically redistribute power during times of planned outages for routine line maintenance, equipment replacement, or even seasonal load adjustments. Manual switches can also be used to isolate faults in areas where immediate power restoration is not necessary or to perform an emergency sectionalizing function to quickly restore power to the customers affected by a power outage. The Diamondback switch does not require de-energizing the system prior to switching so customer service is not disrupted.

Automated Switching

By adding a controller to the Diamondback switch, the user can perform all of the functions of a manually operated switch without having to dispatch a crew to the switch site. Additionally, current and voltage can be monitored via SCADA. Ideal applications include Fault Isolation, Tie Points, Loop Schemes, Automatic Transfer, and SCADA.

Electrical Ratings Chart for Diamondback Loadbreak 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 (1.2x50µs)		150kV
Power Frequency Withstand Voltage (1 min)		60kV
Control Operating Voltage		120/220VAC
Weight		99 kg (218.3 lbs)