Medium Voltage Products
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MV Switchgears
Medium Voltage Switchgear using Vacuum C.B (SG15_MILE / SG25_MILE) 12 & 24Kv up to 3150A.
Exclusive licensed manufacturer authorized by TAVRIDA ELECTRIC, we manufacture a Compact air insulated withdrawable MV switchgear – Based on vacuum switching technology, air insulation, digital protection, and arc-flash relays which is Type tested according to IEC 62271-200, MILEtype inherently saves the environment as it is SF6-free switchgear.
Power block assembled metal construction including all necessary mechanical interlocks with auxiliary wiring to be tailored by customer himself.
Vacuum C.B. with magnetic actuator can interrupt in 16ms (The fastest arc fault interruption
in the industry).
Circuit breakers
The withdrawable Circuit breaker is based on a fixed type of TEL circuit breaker and control module, which includes two types of modules:
- ISM-switching modules (either LD or MD, Shell or HD types) used to close and open
primary circuits, - Control module (CM) used to provide control of ISM (close and trip operations) and to replicate the auxiliary interface of conventional CB.
MILE switchgear
Compliance with IEC 62271-200 to perform safer.
MILE is designed to meet the LSC2B-PM AFLR 31,5kA 1s classification as per IEC 62271-200.
The design is fully type tested to IEC 62271-200. The following type tests have been
successfully passed:
- Short time and peak withstand current on primary circuits
- Short time and peak withstand current on earthing circuits
- Temperature rise and main circuit impedance
- Dielectric test on main and auxiliary circuits
- Making and breaking capacity of the circuit breaker within the panel
- Earthing switch making capacity
- Mechanical operations
- IP code
- Internal arc fault (IAC classified: AFLR, 31.5kA/1s)
Exceptional safety
In addition to IEC 62271-200 requirements, the application of TAVRIDA ELECTRIC VCB with MAGNETIC ACTUATORS in MILE provides unique and unrivalled safety features such as remote and safe manual closing of VCB with a palm-held manual generator and the fastest arc fault interruption in less
than one cycle.
High operational reliability
- The robust enclosure, made of 2mm corrosive resistant hot-dip galvanized metal sheets with reinforced doors and a safety labyrinth allows fast and simple erection even on an uneven floor.
- A rivet nut design provides not only the rigidness of construction but also an opportunity to replace metal parts on site without the use of special tools.
- An emergency trip push-button is located in the center of the panel. It has a striking, protruding design protected against accidental operation. The trip button can be quickly spotted
in an emergency. - Large and clearly visible mechanical position indicators located in view of an operator allows him to positively identify the operating status of the draw-out unit, VCB and earthing switch. Each mechanical indicator abruptly changes its status so that it exactly corresponds to the status of the switching device. Mechanical position indicators are duplicated by electrical auxiliary contacts to provide electrical signals into secondary circuits.
- Lockable access to the VCB racking in/out mechanism by a metallic shutter prevents unauthorized operations and interlocks the VCB in the trip position prior to racking a draw-out unit.
- An LV plug interlock visually prompts an operator to connect the draw-out unit to secondary circuits before the compartment door is closed.
- Refined accessories, such as door hinges, handlebars, locks and electrical indicators and buttons withstand thousands of operations and guarantee the appearance of a beautifully crafted product.
- Minimum service checks on site. MILE is designed for a service life of at least 30 years. The VCB, earthing switch and cast resin insulation technology is considered virtually maintenance free, so the maintenance requirements are only related to periodical checks to make sure that the system operates correctly.
Greater application versatility
- The design of 12, 17,5 and 24kV panels is unified.
- Cassette and truck versions are available.
- Front or Front and Rear accessibility to the cable compartment
- Two sets of CTs and VT cassette placed in VCB or cable compartments.
- Panel width can be 600, 750 or 1000mm.
CBs Key Benefits:
- Environmentally friendly
- The ISM does not use SF-6 insulation materials.
- The CM and ISM modules are manufactured from environmentally friendly materials.
- High reliability
- 50,000 CO operations at rated current and 100 full rated short-circuit operations without any maintenance make it the most reliable circuit breaker on the market.
- Lightweight and compact dimensions
The Fastest Arc Fault Interruption in less than one cycle:
An arc fault rapidly discharges significant energy, and the duration of arcing is crucial in mitigating damage and minimizing the risk of personal injury. The energy released during an arc fault is directly tied to the total clearing time. Despite enhancements in relay response times, the opening times of the VCB with a motor spring mechanism typically extend up to five cycles.
The range is ideally suited for all types of applications which call for :
- Reliable, safe, environmentally, and friendly switching medium (Vacuum)
- Interlock mechanisms to improve operation and safety.
- Signal outputs to monitor operation of the circuit breaker.
- The insulation system, operating mechanism and vacuum interrupter are maintenance free. No maintenance is needed at all.
- Compatibility with SCADA systems.
Field Design
MILE has a typified design so that the arrangement of equipment and instruments in the panel represents the mainstream concept of switchgear specified by most customers worldwide. In addition to draw-out units at a central location and make-type earthing switches, the design is considerably augmented to provide exceptional safety, absolute reliability and top performance.
MILE is created for straightforward manufacturing. No turning, grinding or cleansing is necessary. No jigs or welding processes are required for assembly. The enclosure is made of corrosive resistant hot-dip galvanized metal sheets. Its design allows fast assembly with rivets and screws only.
1- LV COMPARTMENT
is segregated with earthed metal partitions and has spaces for multi-functional protection relays, energy meters, lighting, heating and other devices.
2- VCB COMPARTMENT
It has a pressure relief channel, and houses the bushing insulators containing fixed contacts for the connection of the C.B. to the busbars and the cable compartment. The bushings are covered by automatic metallic shutters, an emergency trip push-button, and two inspection windows for mechanical position indication: one for VCB and the other for draw-out unit mechanisms; are fitted into the compartment. The VCB is mechanically and electrically interlocked with the compartment door so that the door cannot be opened until the VCB is turned off and racked out to the test position.
3- AUTOMATIC SHUTTERS
Operated earthed metallic shutters are automatically driven During the movement of the VCB from the test to the service position and vice versa. The busbar and cable shutters can be separately padlocked in the open position to prevent accidental contact with any live parts.
4- BUSBAR COMPARTMENT
The busbar system is made of electrolytic copper and totally enclosed in its own earthed metal compartment with a pressure relief flap on the top, the busbars and the branch connections can be completely insulated.
5- GAS EXHAUST DUCT
IT accommodates 3- pressure relief flaps and is mounted on the top of each panel. It runs along the whole length of the switchboard. The pressure generated by the internal arc makes relief flap open thus allowing hot gases to run into a special chimney to be evacuated to dedicated areas.
6- CURRENT TRANSFORMERS
To facilitate maintenance, cast resin CTs are fitted onto a pivoting plate. Two sets of CTs can be installed on a panel for distance or differential protection.
7- VOLTAGE TRANSFORMERS
VTs can be mounted on central or lower draw-out units. The striker system is intended for sending a signal about a blown fuse into the SCADA system. Fixed or top installations of VTs are available.
8- EARTHING SWITCH
It is equipped with a mechanical position indicator that can be viewed through the inspection window on the cable compartment door. An additional mechanical position indicator is located in the ES operating mechanism. The ES can be operated manually from the front of the panel or by an electrical motor via SCADA
9- CABLE TERMINATIONS
Single and three-core cables up to a maximum of 7 per phase and up to 4 cables when a VT draw-out unit is installed, can be used depending on the rated voltages, panel dimensions and cable cross section.
10- EARTHING BAR
Made of electrolytic copper, It runs along all adjacent panels and connects to the main earthing bar of the substation. All current carrying parts are interconnected with each other for equipotential bonding to guarantee personal safety against electrical shock.