Medium Voltage Switchgear
FOR SECONDARY & PRIMARY DISTRIBUTION
Premier Customer Service
Detailed Engineering & Technical Support
Industry Leading Lead Times
Fast Response
Flexible Solutions
Dedicated Project Managers
Premier Customer Service
Whether it is for an initial request, products in manufacturing or after sales service. We are here for you. Our experts are available both on- and offline, quick and thorough to respond and ready to answer any question you have
Short Lead Times / Industry Leading Lead Times
Time is almost always of the essence. Our streamlined production and strategically planned supply chain ensures that you get your gear on time, de-risking your project and giving you certainty in execution.
Fast Response
In line with our customer service speed and efficiency are issues important to us. Our fast response time extends to questions, clarifications to any project and service related issue. Unsure which expert is the right one to contact? Not to worry, we will be happy to connect you.
Flexible Solutions
We meet industry standards but are not constrained by standard solutions. If you have specific requests or more uncommon designs we are flexible in accomodating them. Not sure if it will work? Feel free to ask us anything.
Dedicated Project Managers
Ownership and accountability are words we take seriously – and they are reflected in our project management approach: hands on and professional. All our project managers are engineers and many are certified project management professionals. Whether it is the project plan, shopfloor or site, our project managers ensure that everything is in order and on time.
Detailed Engineering & Technical Support
Our gear is designed and built by experts for experts. Our engineering and R&D teams ensure the highest level of support, to meet your specifications and requirements. Value engineering is as important to us as it is to you – we will frequently suggest improvements, when and where they can be made.
Improving Efficiency & Solving System Challenges
We offer a wide range of medium voltage switchgear options suitable for supporting customers in industrial, commercial, and utility installations involving generators, motors, feeder circuits, transmission, and distribution lines
Air-Insulated Switchgear – AIS
Proudly manufactured in Lake Mary, Florida, our medium voltage air-insulated switchgear provides safe, reliable switching and fault protection.
JST Power Equipment type J100CLAD™ is an IEEE-rated, non-arc-resistant, metal-clad switchgear product line with Type J3MAG™ vacuum circuit breakers.
Product ratings and highlights listed below:
Features
- Fully compliant to the latest standards (IEEE C37.20.2-2015 and ANSI C37.55-2020) for metal-clad switchgear construction
- UL Label
- Modular design and construction
- Galvanized steel construction
- Two-high construction
- Top and bottom cable or bus duct entry
- ISO 9001 certified manufacturing facilities
- PT/Fuse compartment closed door racking
- Closed-door racking
- Front accessible circuit breaker operating mechanism for ease of maintenance
- Outdoor non-walk-in (ODNWI)
Advantages
- Built in Racking Mechanism
- Built into cubicle vs on truck (lighter weight breaker)
- Allows for easy addition of electric racking solution
- Easier replacement or movement of breakers
- TOC Switch Aux Contacts
- 8/16 pole contacts
- Positive Pole indication
- Tilt out CPT/PT Compartment (with closed or racking)
Benefits
- Single phase operation
- Magnetically actuated breaker
- Independent pole actuators
- Longer life, lower operation costs
- Safer design, easier access for service
- (9)a (9)b Auxiliary Contacts
- Having few moving parts eliminates lubrication requirements
- Direct drive of push rods eliminates torque in breaker
- Fully compliant to IEEE C37.04-2018 and IEEE C37.09-2018
- Fast reclose duty qualified
- Consistent operating time over life of unit
- Chain driven mechanism
- Improve SAIFI/SAIDI scores
Value Basis
- Longer life/higher reliability
- Removes failure points from truck assembly
- Upgrades are easy to retrofit
- Higher up times for your customers
- System design flexibility
- Safer & easier inspection leads to lower maintenance costs and improved personnel safety
| Parameters | Unit | 4.76kV | 8.25kV | 15kV |
| Rated Voltage | kV | 2.4, 4.16 | 4.8, 6.9, 7.2 | 7.2, 8.4, 12.47, 13.2, 13.8, 14.4 |
| Rated Continuous Current | A | 1200, 2000, 3000 | ||
| Short Circuit Current | kA | 25,31.5,40,50 | 40 | 25, 31.5,40,50 |
| Rated Short-Time Current, 2 sec. | kA | 25,31.5,40,50 | 40 | 25, 31.5,40,50 |
| Rated Frequency | Hz | 60 | 60 | 60 |
| Rated Frequency Withstand | kV | 19 | 36 | 36 |
| Power Frequency Withstand | kV | 60 | 95 | 95 |
| Rated Withstand Current, 10 Cycles | kA | 65 to 130 | 104 | 65 to 130 |
| Max. Permissible Tripping Delay | Sec. | 2 | ||
| Rated Close & Latch Current Rating | kA | 65 to130 | 104 | 65 to 130 |
| Rated Cable Charging Current | A | 25 | 25 | 25 |
| Rated Isolated Capacitor Bank Current | C2 630A | C2 630A | C2 630A | |
| Rated Interrupting Time, 50 ms. | ms. | 50 | 50 | 50 |
| Rated Control Voltage | AC/DC | 48-250 | 48-250 | 48-250 |
| Standard Operating Duty | O-0.3s-CO-3min-CO | O-0.3s-CO-3min-CO | O-0.3s-CO-3min-CO | |
J3MAG™ Breaker
The J3MAG™ offers several advanced features, including single-phase operation and independent pole actuators, and its limited moving parts reduce overall maintenance costs to a bare minimum and improve system reliability.
Features & Benefits
- Single phase operation
- Magnetically actuated breaker
- Independent pole actuators
- Having few moving parts eliminates lubrication requirements
- Direct drive of push rods eliminates torque in breaker
- Fully compliant to C37.04-2018 and C37.09-2018
- Fast reclose duty qualified
- Consistent operating time over life of unit
- Chain driven racking mechanism
- Standard five-year warranty
- Improve SAIFI/SAIDI scores
- Longer life, lower operation costs
- Safer design, easier access for service
Product Applications
- Suitable for both Indoor and outdoor applications
- Outdoor non-walk-in
- PDC construction
- Distribution line
- Main – tie – main systems
- Main – main systems
- Switching and protection for:
- Generators
- Feeder circuits
- Cap banks
- Transformers
- Motors
- Resistive loads
Gas Insulated Switchgear – GIS
JST’s Medium voltage gas-insulated switchgear offering consists of fixed-mounted vacuum circuit breakers that are connected to the main bus through three-position switches.
JST’s gas insulated switchgear a new generation of miniaturization gas insulated medium voltage switchgear for distribution applications that utilizes advanced technologies of laser, sensing, composite insulation and electric field optimization, informatized and intelligent production and control methods to ensure product’s quality and reliability.
JST’s medium voltage gas-insulated switchgear is tested according to the following standards:
IEC 62271-200, IEC 62271-103, IEC 62271-105, IEC 62271-102, IEC 62271-100, IEC 480, GB11023, GB12022 and GB11033
C-GIS = J20X™
Medium voltage applications using SF6 gas and Air as an insulating medium. For use on lighter duty secondary distribution applications, we offer a variety of panel designs at the standard ratings:
- 12kV / 630A / 20kA
Ring Main Unit (SF6) = J10X™
Ring Main Unit is a medium voltage solution utilizing SF6 gas as an insulating medium. RMU is offered in a range of ratings designed for use on secondary distribution applications. We offer a variety of panel configurations to suit all the required needs at the following ratings:
- 5kV / 630A / 25kA
- 12-24kV / 630-1,250A / 20-25kA
Ring Main Unit (Nitrogen) = J10N™
An eco-friendly ring main unit used on medium voltage applications utilizing N2 gas as an insulating medium. For use in lighter duty secondary distribution applications, we offer a variety of panel designs at the standard ratings:
- 12kV / 630A / 20kA
Ring Main Unit (Solid-Insulated) = J10SI™
For use on medium voltage applications utilizing an epoxy resin composite as an insulating medium. For use on secondary distribution applications, we offer a variety of panel designs at the standard ratings:
- 12kV / 630A / 25kA
Ring Main Unit (Semi-Insulating)
Medium voltage applications using SF6 gas and Air as an insulating medium. For use on lighter duty secondary distribution applications, we offer a variety of panel designs at the standard ratings:
- 12kV / 630A / 20kA
| Parameters | Unit | J20X™ | J10X™ | J10N™ | J10S™ | J10SI™ | |
| C-GIS | RMU | Nitrogen RMU | Soild-Insulated | Semi Insulated | |||
| Insulated Medium | SF6 | SF6 | SF6 | N2 | Solid Resin | SF6 and Air | |
| Lightning Impulse Withstand (BIL) | kV | 150 | 150 | 95/125 | 95 | 95 | 95 |
| Rated Voltage | kV | up to 40.5kV | up to 40.5kV | up to 24kV | up to 12k | up to 12k | up to 12k |
| Rated Current | A | up to 2500A | up to 1250A | up to 630A | up to 630A | up to 630A | up to 630A |
| Rated Short Circuit Breaking Current | kA | up to 31.5kA | up to 25kA | up to 25kA | up to 20kA | up to 25kA | up to 20kA |
| Dimensions (WxDxH) | mm | 600-800x1600x2400 | 450x1000x1700 | 350x800x1450 | 44x800x1450 | 440x898x18700 | 375x915x1800 |
| in | 24-32x63x94.5 | 14x32x57 | 14x32x57 | 17.5x32x57 | 17.5x32x57 | 1 | |
J20X™
Medium voltage applications using SF6 gas and Air as an insulating medium. For use on lighter duty secondary distribution applications, we offer a variety of panel designs at the standard ratings:
- 12kV / 630A / 20kA
J20XGear: Cubicle Type Gas insulated Switchgear (C-GIS type Metal Enclosed Switchgear) – Ratings Table:
| No. | Item | Unit | Switch Disconnect Unit (Panel G) | Circuit Breaker Unit (Panel V) | |
| 1 | Rated Voltage | kV | 15/27/38 | ||
| 2 | Rated Power Frequency Withstand Voltage (1 min) | Phase - Phase and Phase - Ground | kV | 36/60/80 | |
| Across isolated switch | kV | 40/66/88 | |||
| 3 | Rated Impulse Withstand Voltage (BIL) | Phase - Phase and Phase - Ground | kV | 95/125/150 | |
| Across isolated switch | kV | 105/145/165 | |||
| 4 | Rated Frequency | Hz | 50/60 | ||
| 5 | Rated Current | A | 600/1200/2500/3000* (* only for 15kV) | 600/1200/2500/3000* (* only for 15kV) | |
| 6 | Rated Short Circuit Interrupting Current | kA | N/A | 20/25/31.5/40* | |
| 7 | Rated Short time Withstand Current (2 Sec) | kA | Up to 31.5 | 20/25/31.5/40* | |
| 8 | Rated Peak withstand Current | kA | Up to 82 | 52/65/82/104* | |
| 9 | Rated Close & Latch Current | kA | Up to 82 | 52/65/82/104* | |
| 10 | Mechanical Endurance | Ops | 3000/3000 (DC/ES) | 10000/3000/3000 (VCB/DC/ES) | |
| 11 | Rated Gas Pressure (@ 20֯C) | Bar | 1.3 (15/27 kV and 1.4 (38kV) | ||
| 12 | Annual Leakage Rate | %/year/Tank | < 0.01% | ||
| 13 | Insulated Gas | SF6 (15/27/38 kV) | |||
| 14 | Enclosure Protection Class | IP3X, IP4X | |||
| 15 | Tank Protection Class | IP67 | |||
DEDICATED TEAM
Meet The Experts
“We offer expert and end-to-end support from the moment we receive your request until your switchgear is delivered.”
“Our quality is your peace of mind. This promise extends from the initial delivery to when our products are in service. Feel free to send us any after sales service request you may have. We are here to help.”
“Engineered to value – this is reflected in the concise level of detail of our proposals and in the quality of our finished product.”
“Why JST? Our transformers combine superior quality without compromising on lead time.”
“Our switchgear is designed and tested according to industry standards, while reflecting best practices and learnings we have gathered as a manufacturer.”
“Are you looking for a quality response on your transformer and switchgear needs? JST is here for you: with our team of experts, proven track record and industry insight.”
Office Headquarters
30 Skyline Drive
Lake Mary, FL 32746
Sales@jstpower.com
Contact Us
+1 407-632-4050
844-631-9046 (Toll Free)