Medium Voltage Switchgear
Gas-insulated and air-insulated switchgear solutions
The most flexible switchgear options for your power distribution application
Our line of switchgear solutions has been specially designed and re-engineered for over 25 years of continuous development and optimization. We offer medium voltage switchgear to support primary and secondary power distribution networks in various sizes, configurations and insulating mediums. Across all types, our solutions are designed and tested according to ANSI, IEEE and NEMA standards and are UL listed. In addition, our switchgear is fully tested under IEC and IEEE standard for Internal Arc Classification (IAC) safety.
Industry-Leading Lead Times
2 - 3 Weeks RFQ Lead Time for GIS
24 - 28 Weeks Gas-insulated Switchgear
2 - 3 Weeks RFQ Lead Time for AIS
24 - 26 Weeks Air-Insulated Switchgear
J10N™ & J20N™ Dry Air Gas-Insulated Switchgear
Our dry air Gas Insulated Switchgear (GIS) is a more environmentally friendly alternative to traditional gas-insulated switchgear—as it does not contain SF6 gas and instead utilizes natural gas as an insulating medium. As a result, our solution is not subject to regulations and leaves no harmful impact to the environment. In addition, our dry air switchgear offers lower costs due to its simple design and the abundance of gas. We offer a variety of panel designs at the following standard ratings:
- J10N GIS – 5 kV / 600 A / 20 kA
- J20N GIS – 38 kV / 1200 A / 31.5 kA
- 69 kV options (COMING SOON)
Dry Air GIS Solution Advantages
LOWER ENVIRONMENTAL IMPACT THAN SF6 SWITCHGEAR
UP TO 75% SPACE SAVINGS COMPARED TO AIS
REDUCED INSTALLATION & MAINTENANCE COMPARED TO AIS
FRONT ACCESS PANEL FOR EASE OF MAINTENANCE
J10X™ Ring Main Unit Gas-Insulated Switchgear (SF6)
Our J10X Ring Main Unit (RMU) Gas-Insulated Switchgear is a great option for power distribution applications It offers optimal dielectric strength while maintaining excellent arc-quenching properties for enhanced safety. Customers often base their decision on the type of GIS solution they choose on space limitations. We offer individual tank and combined tank configurations under the following parameters:
- Individual gas tank: 15 kV – 38 kV / 1200 A – 600 A / 20 kA – 25 kA
- Combined gas tank: 15 kV – 27 kV / 600 A / 20 kA
J10X Solution Advantages
LIGHTWEIGHT, COMPACT DESIGN
UP TO 75% SPACE SAVINGS COMPARED TO AIS
UL LISTED TECHNOLOGY
ROBUST PERFORMANCE WITH ENHANCED SAFETY
J20X™ Cubicle-Type (C-GIS) Switchgear
A robust, industrial optimized medium voltage solution utilizing SF6 gas and air as an insulating medium. Our J20X Cubicle Type Gas insulated (C-GIS) Switchgear is offered in a wide range of ratings designed for use in primary distribution applications. For use on lighter duty secondary distribution applications, we offer a variety of panel designs at the standard ratings:
- 5 kV / 3000 A / 40 kA
- 38 kV / 2500 A / 31.5 kA
- 69 kV / 1200 A / 31.5 kA
J20X Solution Advantages
CUSTOMIZABLE ENCLOSURE OPTIONS
UP TO 75% SPACE SAVINGS COMPARED TO AIS
FULLY ARC RESISTANT
FLEXIBLE DESIGN WITH EXTENDED SPACE
Technical Specifications – Dry Air GIS
| Parameters | Unit | J10N | J20N | J20N |
|---|---|---|---|---|
| Rated Voltage | kV | 5 | 38 | 69 |
| Rated Power Frequency Withstand Voltage | kV | 28 | 80 | 140 |
| Rated Lightning Impulse Withstand Voltage (BIL) Phase to Phase and Phase to Ground | kV | 75 | 170 | 325 |
| Rated Continuous Current | A | 600 | 1200 | 1200 |
| Rated Short Circuit Current | kA | 20 | 31.5 | 31.5 |
| Rated Peak Withstand Current | kA | 50 | 82 | 82 |
| Rated Frequency | Hz | 60 | 60 | 60 |
| Rated Gas Pressure (20C) | Bar | 1.3 | 1.3 | 1.3 |
| Annual Leakage Rate | Year | < 0.1% | ||
| Operational / Survival Temperature Range** | °C | -25 to +40 / -50 to +60 (low temp upon request) | ||
| Ingress Protection Code: Gas Tank / LV** | IP67 / IP40 | |||
| Altitude** | m | < 2,000 (high altitude upon request) | ||
| Internal Arc Class (IAC) – Arc Resistance Code | 1 sec | AFLR | ||
| Width** | mm | 450 | 600 | 800 |
| Height** | mm | 450 | 1200 | 2360 |
| Depth** | mm | 1610 ~2100 depends on power cables entry top / bottom. Max is 6 cables bottom entry, 4 power cables top entry. | ||
** – please contact JST for non-standard request *** – by end of 2024, 800 mm width for 69kV will be available
Technical Specifications – Sulfur Hexafluoride (SF₆) GIS
| Parameters | Unit | J10X | J10X | J10X | J20X | J20X | J20X |
|---|---|---|---|---|---|---|---|
| Rated Voltage | kV | 15 | 27 | 28 | 5 | 38 | 69 |
| Rated Power Frequency Withstand Voltage | kV | 36 | 60 | 80 | 28 | 80 | 140 |
| Rated Lightning Impulse Withstand Voltage (BIL) Phase to Phase and Phase to Ground | kV | 95 | 125 | 150 | 75 | 150 | 325 |
| Rated Continuous Current | A | 600 | 600 | 600 | 3000 | 2500 | 1200 |
| Rated Short Circuit Current | kA | 20 | 20 | 25 | 40 | 31.5 | 31.5 |
| Rated Peak Withstand Current | kA | 50 | 50 | 65 | 100 | 82 | 82 |
| Rated Frequency | Hz | 60 | 60 | 60 | 60 | 60 | 60 |
| Rated Gas Pressure (20C) | Bar | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |
| Annual Leakage Rate | Year | < 0.1% | |||||
| Operational / Survival Temperature Range** | °C | -25 to +40 / -50 to +60 (low temp upon request) | |||||
| Ingress Protection Code: Gas Tank / LV** | IP67 / IP40 | ||||||
| Altitude** | m | < 2,000 (high altitude upon request) | |||||
| Internal Arc Class (IAC) – Arc Resistance Code | 1 sec | AFLR | |||||
| Width** | mm | 450 | 450 | 450 | 600 | 900 | 850*** |
| Height** | mm | 2100 | 2100 | 2100 | 2500 | 2500 | 2360 |
| Depth** | mm | 1610 ~2100 depends on power cables entry top / bottom. Max is 6 cables bottom entry, 4 power cables top entry. | |||||
J100CLAD™ Air-Insulated Switchgear (AIS)
Our J100CLAD medium voltage air-insulated switchgear provides safe, reliable switching and fault protection. Our solution is an IEEE rated, non-arc resistant, metal clad medium voltage solution that provides safe, reliable switching and fault protection. With independent pole actuators and 3-cycle operation, it maintains a consistent operating time over the life of the unit. And the J100CLAD AIS is specially designed with our J3MAG™ vacuum circuit breaker with the following standard power ranges:
- 5 – 15 kV / 3000 A / 25 – 50 kA interrupting
J100CLAD Solution Advantages
ENVIRONMENTALLY-FRIENDLY ALTERNATIVE TO GIS
FLEXIBLE, MODULAR DESIGN AND CONSTRUCTION
TILT-OUT CPT / PT COMPARTMENT FOR EASE OF MAINTENANCE
BUILT-IN RACKING MECHANISM
J3MAG™ Circuit Breaker
The J3MAG breaker has been specially designed for optimum performance and ease of operation and maintenance for the J100CLAD Air-Insulated Switchgear. It is a magnetic actuated breaker that offers single-phase operation with independent pole actuators. Having few moving parts, it eliminates the lubrication requirements that exists for other breakers, allowing for longer life and lower operation cost.
J3MAG Solution Advantages
FEWER MOVING PARTS FOR REDUCED MAINTENANCE
LONGER LIFE WITH LOWER OPERATIONAL COSTS
IMPROVED SAIFI / SAIDI SCORES
SAFER DESIGN WITH EASIER ACCESS DURING SERVICE
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