Overview

The North American load switchgear complies with IEEE C37.20.3 standards, typically utilizing air-insulated load switches similar to the application of current ring main units. They primarily operate in conjunction with transformers, providing load switching and short-circuit protection via fuses.

Specifications

Height: 66 inches

Components: Includes a 3-pole load switch rated for 5.5 kV and 200 A.

Enclosure: Available for indoor (NEMA 1) and outdoor (NEMA 3R) applications, featuring a separate housing.

Fuses: Can use non-fused or ANSI-style fuses rated from 10E to 200E.

Factory-installed Features: Auxiliary switches, strip heaters, and key interlocks for "lock-open" operation.

Cable Connections: Fixed screw-type cable lugs for #14 solid to 2/0 stranded aluminum or copper cables, supporting dual lines and single loads.

HVL/cc Metal-Enclosed Load Switchgear

Design: Modular units for easy expansion; two main bus positions for future connectivity to existing equipment.

Access: Maintenance is front-entry only for systems operating below 17.5 kV. The specialized front-entry enclosure can be placed against walls in compact rooms or prefabricated buildings.

Cost Efficiency: Reduced footprint can lead to minor cost savings in building or room size.

Load Switch Features

Positions: Closed, open, and internal grounding (optional).

Insulation: Epoxy resin.

Medium: SF6 (sulfur hexafluoride).

Maintenance: Lifetime sealed, maintenance-free.

Pressure Ratings:

5.8 psi (≤ 17.5 kV)

22 psi (25.8–38 kV)

Standard Features of Switchgear

Metal-Enclosed Circuit Breakers:

Compartment for switches, busbars, fuses/cables, mechanisms, and optional low-voltage/control.

Constructed from 11-gauge steel with epoxy resin insulation.

Interlocked fuse/cable maintenance panel.

Front access for systems under 17.5 kV.

Simulated bus bars.

Locking devices for open/close operations.

Top or bottom cable entries.

UL/CUL certified and compliant with IEEE C37.20.3.

Live indicators on all incoming switch compartments and outgoing feeder circuits.

Includes cable lugs for each phase.

Tinned copper busbars for lines.

Quick Ship Program

The HVL/cc quick ship program offers both fused and non-fused load switches for standalone or transformer main applications, ensuring faster delivery with fewer options.

Independent Use

Configuration: Three-pole, 600 A HVL/cc switches available in independent indoor (NEMA 1) enclosures.

Fuse Options: Available as non-fused or equipped with current-limiting DIN/E fuses.

Factory Options: Includes auxiliary compartments, main bus, auxiliary switches, and surge protection devices. Fuse maintenance panels are mechanically interlocked with the switch mechanism. Fixed screw-type lugs for 2–350 kcmil copper or aluminum cables are provided for line and load connections.