Medium Voltage Distribution Equipment
ANSI Air Insulated Switchgear SafeGear & SafeGear HD
Medium voltage, metal-clad switchgear for primary distribution up to 15 kV suitable for indoor installations
SafeGear and SafeGear HD arc resistant switchgear meets or exceeds IEEE C37.20.2 for metal clad switchgear, IEEE C37.20.7 arc resistant testing guidelines, and has been seismically tested to IBC Region D. SafeGear is also qualified to Ip1.5.
SafeGear, rated up to and including 50kA, and SafeGear HD, rated for 63kA applications, not only meet the conventional standards for metal-clad switchgear, but goes beyond the metal-clad standards to provide the added protection of arc-resistant construction. The arc-resistant design reduces life cycle costs through equipment protection, and improves safety for operations and maintenance personnel.
During an arc fault, expanding hot gases are carefully routed through a system of vents and flaps, through the roof and ducted safely away from personnel at the front, rear, and sides of the switchgear. Doors and panels are reinforced and sealed to withstand the temporary pressure surge until relief vents and flaps operate.
Using techniques such as Type C construction with double sidewalls, damage is contained in the compartment of fault origination, rather than spreading to adjacent compartments (available in SafeGear only). Type B construction allows access to the isolated low voltage instrument compartment while still providing protection from an internal arcing fault. Additional features such as closed door racking, automatic secondary disconnects, and a top mounted plenum increase personnel safety and reduce PPE requirements.
Ultimately, equipment damage is reduced, equipment reliability is increased, and tragic injuries to employees are prevented.
A wide array of rugged, stackable circuit breaker and auxiliary equipment modules are assembled to form the switchgear lineup. The modules can be arranged in a variety of one-high and two-high configurations which allows for fast, efficient delivery of custom switchgear. Quality is assured by extensive design and production tests, coupled with manufacturing in facilities that have been certified in compliance with ISO 9001 and 14001.
SafeGear and SafeGear HD utilize the ADVAC spring charge mechanism breaker. The AMVAC magnetically actuated breaker is available for SafeGear. These breakers have the lowest total cost of ownership due to extremely low maintenance requirements and are the easiest breakers to maintain in the industry.
VESTA-AR™ Medium Voltage Metal-Clad Arc-Resistant Switchgear with magnetically actuated VM1 circuit breaker technology is designed to meet the needs of customers who demand the highest quality power distribution assembly with the smallest footprint (24” x 96” x 60”).
Vesta’s plenum design redirects dangerous arc flash energy away from operating personnel, front-facing current transformers simplify maintenance, and magnetically actuated breakers operate up to 100K times, greatly reducing the need of service, In all, over a dozen key features were built into this revolutionary
Rated Voltage: 5-15kV; 95kV BIL
Current: 600-2000A; 31.5kA
Dimensions / 1200A: 24” x 96” x 60”
Dimensions / 2000A: 30” x 96” x 72”
Magnetically actuated breaker – up to 100,000 operations
Full front accessibility
Draw out breaker, PT, CT & CPT
Shortest breaker pole spacing between phases
Infrared viewing ports
Front and rear viewing windows
Epoxy insulated bus bar as standard
Plenum design incorporated into structural configuration. No additional height requirement.
UL & cUL listed; Type 2A and 2B in accordance with ANSI/IEEE standards
38kV class in indoor, outdoor non-walk-in, and outdoor walk-in enclosures; IEM offers optional component selection including different choices for protective relays, metering devices and PLC monitoring for specific applications. This customizable feature makes IEM an ideal choice for unique projects and for matching or upgrading existing installations.
The 38kV mechanically complete switchgear rated for 40kA is also available with CSA listing when required and applicable, and meets also the seismic requirement of the UBC code.
Ampacity: 1200, 2000
Basic Insulation Level (BIL): 150kV
Breaker interrupter ratings: Up to 40kV
Breaker interrupter rating: Up to 40 kA
NEMA 1: 42” W x 123” D x 95” H
NEMA 3R: 42” W x 132” D x 107” H
Advanced vacuum circuit breaker
Compartmentalized construction with breaker compartment for each device
Breaker & PT can be constructed into one section (feeder only)
Main-tie-main automatic transfer scheme
Rear access for load and incoming connections
Indoor and outdoor applications
IEM Paralleling Switchgear and Control Systems are designed and manufactured to deliver full control of custom-configured power generation systems. They integrate all facets of metering, protection, communication and controls to deliver peak performance, system reliability and operating economy.
IEM’s experience with generators and voltage regulators from all major North American manufacturers, governor systems for prime movers, and proprietary engine controllers results in efficient and innovative parallel switchgear designs for redundant power applications.
Types of Configured Power Systems:
Prime Power – where generators are the only source or main source of power as in island-mode, marine, remote site or military type applications.
Standby – where the generators serve as back-up to the main (utility) source, commonly installed in hospitals, airport, data centers, waste-water/water treatment facilities, including most life-safety institutional applications.
Distributed Generation Systems – where generators are applied to supplement the main source (as in peak shave applications) and may also act as the standby system as well.
Intrinsic System Features:
Load priority control where loads are applied from a pre-determined sequence, highest to lowest priority, based on system capacity and characteristics.
Generator operational control where only the pre-determined number of generators are asked to start and carry load, either in a scramble or preset start-sequence.
Operator interface touch-screen terminals (OIT)/Human Machine Interface (HMI) where system controls and interrogation can be accomplished at the switchgear or from a remote network/PC/PLC.
Remote communications in the most common industry protocols like modbus/canbus and being fully conversant with industry leading Ethernet/interface modules, comm-ports and RS 485 type connections.
Utility paralleling system designs in passive closed transition (waiting for the sources to become synchronized in voltage, frequency and phase angle), active closed transition (where synchronization is dynamically controlled), soft load or continuous base loading systems.
ANSI Air Insulated Switchgear Advance
Medium voltage switchgear for primary distribution up to 38 kV suitable for indoor or outdoor installations
Advance is the first ANSI switchgear with a completely innovative modular, bolted design. Advance metal-clad switchgear offers increased reliability and improved safety. Flexibility of engineering is based on a truly modular concept with many product variations, configurations, and options.
Advance metal-clad switchgear meets or exceeds the requirements of ANSI C37.20.2 and has been seismically tested to IBC Region D, Ip1.5. Enclosures meeting the outdoor requirements of ANSI C37.20.2 are available in either walk-in (sheltered aisle), or non-walk-in configurations. Forced air cooling is also available for 4000 A applications up to 15 kV.
Advance utilizes the ADVAC spring charge mechanism breaker or the AMVAC magnetically actuated breaker. These breakers have the lowest total cost of ownership due to extremely low maintenance requirements and are the easiest breakers to maintain in the industry.
Quality is assured by extensive design and production tests, coupled with manufacturing in facilities that have been certified in compliance with ISO 9001.
Medium Voltage Gas Insulated Switchgear
Word-class primary and secondary distribution switchgear solutions based on gas-insulated technology to suit every application up to 40 kV
Hitachi Energy offers a wide range of MV gas insulated switchgear (GIS) for secondary and primary distribution.
Secondary GIS have been subject to a significant development the past 20 years, resulting in increased functionality and smaller dimensions. Hitachi Energy's Ring Main Units (RMU) and secondary switchgear are prepared for the use in future distribution grids and designed for use in various application such as compact secondary substations, small industries, renewables or infrastructure.
Flexible combination, reliability, availability and economy are the attributes that make it easy for our clients in industry and utilities to decide in favor of primary GIS products from the ZX series. Together with complete conventional solutions, the use of digital protection and control technology, sensor systems and plug-in connections makes ZX systems uninterestedly fit for the future.
Super-Slim Wind Switchgear SafeWind
Tailor-made switchgear for wind turbines is only 420 mm wide and is available in 12 kV, 24 kV, 36 kV and 40.5 kV ratings
SafeWind is the slimmest medium-voltage switchgear on the market and small enough to fit through the narrow doorway of the turbine tower.
Designed specifically to meet the switchgear requirements of wind turbine manufacturers for compactness, safety and flexibility, SafeWind is a complete range of secondary distribution gas-insulated switchgear for onshore and offshore applications in the global wind power market.
The standard width of tower doorways and non-Hitachi-Energy switchgear panels is 600 mm. This means that the switchgear has to be installed on site before the tower is lowered onto it or it has to be built into a secondary substation beside the tower.
The 36/40.5 kV variant of SafeWind, on the other hand, has a width of only 420 mm. It fits easily through the doorway and can be installed after the tower has been raised, giving wind turbine manufacturers a more rational and less costly option.
It also frees up valuable space and provides greater flexibility when arranging and installing the electrical equipment in the confined interior of the tower where space is extremely limited.
Available in the 12 kV, 24 kV, 36 kV and 40.5 kV ratings, SafeWind is part of Hitachi Energy’s hugely successful SafeRing and SafePlus portfolio of gas-insulated switchgear for secondary distribution.
In addition to the super-slim 36 and 40.5 kV variants, SafeWind is available in modules and in a wide variety of configurations, all with the same user interface and dimensions.
All live parts and switching components are protected in a stainless steel tank to ensure the highest levels of reliability and safety, as well as a long and trouble-free service life in the harsh and often inaccessible environments that are typical of wind farms.
The response of the wind industry to the world’s slimmest and most flexible switchgear has been overwhelmingly positive, as SafeWind solves in one timely innovation a number of the industry’s most pressing requirements for reduced footprint and improved flexibility.
Hitachi Energy’s ability to tailor SafeWind to meet the preferences and specifications of individual wind turbine manufacturers enables them to use a standardized switchgear solution in all markets worldwide, including the preferred 40.5 kV GB (national standard) rating in China.
The SafeWind portfolio is designed to take full advantage of Hitachi Energy’s solutions for protection and communication, as well as for easy integration with Hitachi Energy compact secondary substations.
Lake Shore Electric Corporation has been manufacturing Switchgear for over fifty years. While it is virtually impossible to keep track of the thousands of transfer switches installed over the years. While no two jobs are ever the same, Lake Shore Electric Corporation has accommodated most types of generator control switchgear applications. From simple single engine solutions to more complex switchgear for emergency, standby and prime power applications incorporating multiple engine generators and various options such as import/export control, cogeneration, base loading, peak shaving, and or soft loading and unloading. Whether the Switchgear is built for Caterpillar, Kohler, Cummins, Detroit Diesel Allison, Katolight, Generac, Or Mitsubishi, Lake Shore Electric Corporation has decades of successful installs…
The Lake Shore Electric Corporation Insulated Case Automatic Transfer Switch provides dependable, positive, transfer to an emergency power source in the event of normal power source failure. The switch returns the system to the normal power source in an orderly fashion when normal power is restored. In the event that the emergency source fails, the switch will automatically return to the normal source when it becomes available, bypassing all time delays.
In addition to being UL 1008 listed the Insulated Case Automatic Transfer Switch is also designed and built to UL standards applied to the manufacture of our custom switchgear. This allows us the flexibility to offer in addition to a single transfer switch, a complete switchboard incorporating such features as : special bussing to close couple to bus duct; special bussing to close couple to existing switchgear; service entrance rating; separate cable pull sections; front accessibility; side accessibility; utility metering sections; additional sections for related controls and monitoring; incorporation of monitoring and special protective equipment.
Lake Shore Electric Corporation Insulated Case Automatic Transfer Switches utilize stored energy, 3-cycle power automatic or non-automatic power circuit breakers. These are available in current ranges from 800A to 5000A and rated short-circuit range from 65kA to 150kA @ 480V. They are equipped with spring charging motor, manual charging handle, manual mechanical close/open pushbuttons, open/closed mechanical position indicators, stored energy operators, and spring charged/discharged indicators.
The Lake Shore Electric Corporation Insulated Case Manual Transfer Switch provides dependable, positive manual transfer from one power source to an alternate. The Insulated Case switch is tested and listed as a manual transfer switch under U.L. 1008 and is CSA approved. Like the Insulated Case Automatic Transfer Switch, it is also designed and built to the much stricter standards applied to the manufacture of our generator control and distribution switchgear. This provides the flexibility to offer this product as an integral part of a continuous switchgear line-up.
The Insulated Case Manual Transfer Switch functions by means of two mechanically interlocked, insulated case stored-energy switches, or circuit breakers. This is the same class of product typically used to protect the total electrical system. Incorporating these insulated case products into the transfer scheme insures that the level of product integrity and quality is maintained. As with all other Lake Shore Electric products, the speed at which the current carrying contacts open and close is independent from the speed of the manual operator. Therefore, manual transfer of the switch under load can be accomplished without danger to the operator or the connected loads. Maintenance requirements are minimal. All components, from the switches to the pushbuttons and pilot lights are standard, industrial grade components and are readily available and replaceable. In addition, a drawout configuration is available which provides for bypass and isolation of each source switching mechanism.
Lake Shore Electric Insulated Case Manual Transfer Switches are offered in various free-standing enclosures. In addition to steel, stainless steel and aluminum enclosures can also be provided. NEMA 1, 3R, 12 and 4X are available. Our standard enclosure provides for rear accessibility to cable connections as a standard feature on all switches 4000 amperes and below. As an optional accessory Lake Shore Electric Corporation can provide removable side panels for side access
Compact Secondary Substations (CSS) Power Distribution Center
Compact substations are used for energy transformation in secondary distribution network from MV to LV or LV to MV.
CSS is a type tested and arc tested assembly comprising an enclosure containing medium voltage (MV) switchgear, distribution transformers, low voltage (LV) switchboards, connections and auxiliary equipment to supply low voltage energy from medium voltage systems. These substations are typically installed in locations accessible to the public and ensure protection for all people according to specified service conditions.
Medium-Voltage Surge Arresters
Surge arresters are used for protection of electrical equipment from all kind of over-voltages caused by lightening or switching operations. Hitachi Energy has more than 75 years of experience in designing and manufacturing surge arresters.
Hitachi Energy surge arresters are made of metal oxide (MO) resistors without spark gaps directly molded in silicone housing, in grey color, and designed and tested according to ANSI.
Surge arresters for medium voltage systems
Surge arresters for AC traction systems
Surge arresters for DC traction systems
Voltage limiting devices for DC traction systems
Medium Voltage Fuses and Cutouts
MV fuses up to 40.5 kV, commonly known as high voltage fuses, provide main or back-up protection against overload and overcurrents.
Hitachi Energy offers both current limiting and expulsion (non-current limiting) fuses for medium voltage systems. Fuses are tested according to IEC or ANSI standards, depending on design and market preferences. Two housing materials are applicable – porcelain and resin-fiberglass. Both of them are characterized by high mechanical and thermal resistance.
Hitachi Energy fuses have a special design for each application and are suitable for the protection of distribution transformers (current and non- current limiting), voltage transformers (current limiting only), capacitor banks (current limiting and expulsion), motor circuits (current limiting only) and cutouts (non-current limiting only).
The fuses can operate as sole devices or can be combined with air insulated and SF6-insulated switch disconnectors.
Medium Voltage Fused Cutouts: Load Break and Non-Load Break
Distribution cutouts for overcurrent protection on overhead distribution systems up to 38 kV for ANSI, IEC and Australian standards.
Hitachi Energy has a long history of providing safe, reliable over-current protection for distribution systems with interchangeable and non-interchangeable cutouts and fused cutout that also perform as outdoor load break switches.
We design fused cutouts with porcelain, silicone rubber, or polymer concrete insulators. Polymer concrete and silicone rubber cutouts are able to perform in stressful environments, including extreme cold, heat, by the sea coast and in heavy pollution.
Test Switches are designed and manufactured to allow quick and easy multi-circuit testing of switchboard relays, meters and instruments by any conventional system.
These test switches and related test plugs have the features necessary for applications involving the measurement of individual currents and voltages associated with substation instrumentation and protection devices. They have been especially designed for the measurement of potential elements, current elements, and make-before-break short-circuit elements related to Current Transformer (CT) circuits.