Medium Voltage Switchgear

FOR SECONDARY & PRIMARY DISTRIBUTION

Air-Insulated (AIS) Switchgear

Our medium voltage air-insulated switchgear provides safe, reliable switching and fault protection.

JST’s Type J100CLAD™ is an IEEE-rated, non-arc-resistant, metal-clad switchgear product line with Type J3MAG™ vacuum circuit breakers.

This product is proudly manufactured in Lake Mary, Florida. 

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™ Breaker 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 (GIS) Switchgear

JST’s medium voltage gas-insulated switchgear is comprised of fixed-mounted vacuum circuit breakers connected to a main bus through three-position switches.

Our solution is a new generation of miniaturization medium voltage gas-insulated switchgear for distribution applications that utilize advanced laser, sensing, composite insulation and electric field optimization technologies, informatized and intelligent production and control methods to ensure product quality and reliability.

Our 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

J20X™ C-GIS

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
J10X™ Ring Main Unit (SF6)

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
J10N™ Ring Main Unit (Nitrogen)

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
J10S™ Ring Main Unit (Solid-Insulated)

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
J10SI™ 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™

J20X™ C-GIS Switchgear

A robust, industrial optimized medium voltage solution utilizing SG6 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:

  • 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

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

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“We offer expert and end-to-end support from the moment we receive your request until your switchgear is delivered.”

Rebeca C.

SENIOR MARKETING ENGINEER SWITCHGEAR

“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.”

David D.

SERVICE MANAGER

“Engineered to value – this is reflected in the concise level of detail of our proposals and in the quality of our finished product.”

Juan E.

MARKETING ENGINEER

“Why JST? Our transformers combine superior quality without compromising on lead time.”

Emerson M.

INSIDE SALES MANAGER

“Our switchgear is designed and tested according to industry standards, while reflecting best practices and learnings we have gathered as a manufacturer.”

Valeria G.

MARKETING ENGINEER

“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.”

Jonathan W.

VICE PRESIDENT OF MARKETING & SALES

Have questions? Contact our team.

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Office Headquarters

30 Skyline Drive
Lake Mary, FL 32746

Email

sales@jstpower.com

Contact Us

+1 407-632-4050
1-844-631-9046 (Toll Free)