MILE MP

ISO 9001:2008 and ISO 14001:2004 certificationISO 9001:2008 and ISO 14001:2004 certification

Medium-Voltage Switchgear

12kV, 17.5kV and 24kV rated voltagesCassette or truck designs

LCS2B-PM as per IEC62271-200Internal arc classified: AFLR 31,5kA 1s

Fully type-tested as per latest IEC62271-200Ambient temperature range -40..+55°C

Front and front/rear accessibilityTwo sets of CT per panel optionally

Engineering Your PowerEngineering Your Power

PRODUCT CATALOGUE

MILE MP is metal-enclosed air-insulated switchgear conforming to LSC category 2B and partition class PM. MILE panels are intended for indoor installations in 12kV, 17,5kV and 24 kV electrical networks.

Design

• The design is fully type tested including internal arc tests according to IEC 62271-200 (internal arc classified: AFLR, 31.5kA/1s).

• MILE switchgear is fundamentally designed so that all compartments are accessible from the front. Optionally, the cable compartment can be accessible from the rear.

• Cable connection points are at a comfortable height of 460mm. The partition between circuit breaker and cable compartments can be removed to get an easy access to cable terminations.

• Pressure resistant inspection windows on the doors of cable and circuit breaker compartments allow service personnel to visually observe VCB and earthing switch positions.

• Typical panel designs with top-entry for cables or busbars are available.

• MILE panels are created for straight-forward manufacturing. No welding, truing, grinding and cleansing procedures are required.

• Mechanical and electrical interlocks as well as provisions for padlocks are available.

• All switching operations can be performed with the doors closed.

Design versions

There are the two design versions of the withdrawable unit:

Cassette version:- tolerant of the floor surface condition- low weight- removable from a panel with the help of a

service trolley.

Truck version:- meeting the requirements "service all at

once"- no service trolley needed for truck removal

from a panel.

CHARACTERISTICS

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PARTNERSHIP CONCEPT

Switchboard manufacturers and electrical installation companies are facing the challenge of providing their customers with high quality, fully type tested switchgear solutions at reasonable costs. Designing and testing of state-of-the-art medium voltage switchgear become more and more expensive. To assist switchboard manufactures and electrical installation companies Tavrida Electric has developed and type tested this MILE switchgear. Our partners can benefit from a variety of cooperation options.

Licence-free options

1. Ready-made switchgear. The panels are factory-assembled by professionals, routine tested and ready for immediate installation. The quality control at all manufacturing stages is provided by TAVRIDA ELECTRIC. It is the best option for contracting and end-user companies.

2. Power block. It consists of prefabricated LV, busbar, VCB, and cable compartments with all doors and mechanisms installed. Partner is free to opt the following components accepted in its markets and fix them in the power blocks following busbar work.- Protection relays and SCADA units- Current and voltage instruments and energy meters- Auxiliary devices and wiring - Current and voltage transformers- Surge arrestersThis option is made for assembling factories having testing facilities.

Technical license option

Tavrida Electric grants a technical license to sw i t chboa rd manufac tu re r s wh i ch have manufacturing, assembling and testing facilities. It includes the transfer of the latest versions of technical documentation and drawings; technical support and training of licensee personnel. A licensee manufactures MILE panels utilizing Tavrida Electric components.

Panel retrofit option

A loose circuit breaker compartment (CBC) is a convenient means to upgrade existing switchgear. It can be used for the replacement of obsolete floor-rolling trucks equipped with oil or vacuum circuit breaker. CBC includes metal enclosure, a front door with hinges and locks, bushings, shutter mechanism, earthing switch, mechanical and electrical interlocks between VCB and the earthing switch.

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Properly designed labyrinths as well as additional steel sheets provide maximum operator safety in case

of internal arc fault.

ENCLOSURE

The enclosure is made of corrosive resistant hot-dip galvanized steel sheets. Its design allows fast assembly with screws only. No welding, truing, grinding or cleansing is necessary. No jigs are required for assembly.

Doors

The coated doors are made of hot-dip galvanized steel sheets. Robust hinges and handles provide for convenient and safe closing. The closing mechanisms are available for left or right hand operation. Inspection window is made from explosion-proof glass providing maximal safety for personal.

Natural ventilation circuit

Тhere is a natural ventilation circuit arranged around the circuit breaker to provide powerful extraction of the heat appearing due to circuit breaker operating at high currents or at high ambient temperatures. The cool air is sucked into the circuit below the circuit breaker door and withdrawn from the panel through the gas exhaust channel. In case of internal arc blast, the reverse air current boosted by a high pressure instantly closes the special valve inside the shaft, thus preventing hot gases escaping from the panel.

Rounded edges guarantee safe handling

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A. Low voltage compartmentB. Busbar compartmentC. Circuit breaker compartmentD. Cable compartment

1. Protection relay2. Earth Switch (make type)3. Vacuum Circuit Breaker4. Pressure release flaps5. Through insulators6. Fixed contact insulators7. Current transformers 8. Live shutters9. Surge arresters10. Voltage transformers with fuses11. Outgoing cables12. Sealed cable entries 13. Doors with 4 points locking system14. Door handles with padlock option15. Inspection window

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Cassette version

Truck version

COMPARTMENTS Each panel consists of four compartments:

• Busbar compartment (A)• Circuit breaker compartment (B)• The low voltage compartment (C)• Cable compartment (D)

Two metal ducts for auxiliary circuit wiring run on each side of the panel from the bottom to the LV compartment.

All service and maintenance operations are carried out from the front with the switchboard being wall-mounted. Optionally access to the cable compartment is available from rear.

For maximum operator safety all switching operations are performed with the doors closed.

Busbar compartment

The busbar compartment houses the main busbar system connected to the fixed upper isolating contacts of the circuit breaker by means of branch connections. The main busbars are made of electrolytic copper. The busbar compartment of each panel is segregated from the busbar compartments of the neighbouring panels.

Low voltage compartment

The low-voltage compartment is designed to mount all secondary circuit connections within the single panel as well as interconnections between adjacent panels and transit connections. The spacious compartment allows the installation of multi-functional microprocessor protection relay, energy meters, lighting, heating and many other devices.

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Cable compartment

The cable compartment houses the branch connections earthing busbar earthing switch power cables surge arresters instrument transformers

(current transformers, voltage transformers)

Circuit breaker compartment

The circuit breaker compartment houses the bushing insulators containing fixed contacts for the connection of the circuit breaker to the busbars and the cable compartment. The bushings are single-pole type and are made of cast resin. They are covered with metallic shutters.

The metallic shutters operate automatically during the movement of the circuit breaker from the racked-out position to the service position and vice versa.

The position of the circuit breaker can be seen from the front of the panel through an inspection window.

Access and service continuity

The switchgear compartments do not need any tools for opening. Interlocks allow an access only when the corresponding high voltage parts are dead and earthed. Metallic shutters and partitions segregate the compartments from each other and when a compartment is opened all other panels in the installation and all Cable compartments (including that in the panel concerned) remain in operation. (LSC2B-PM according to IEC 62271-200).

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EQUIPMENT Earthing switch

Each Cable compartment can be equipped with an earthing switch for cable earthing.

When installed in metering, bus coupler or bus riser panels it can also be used to earth the busbar system.The earthing switch has a short circuit making capacity. The position of the earthing switch can be seen from the front of the panel by means of mechanical position indication and in addition through an inspection window on the rear door.

Interlocks

MILE switchgear is fitted with all interlocks needed to guarantee the highest level of safety for operators. According to IEC 62271-200 the interlocking devices prevent• closing of the circuit breaker in an intermediate

position• racking-out of the circuit breaker in the closed

position• racking-in of the circuit breaker in the closed

position• opening of the circuit breaker compartment door

as long as the circuit breaker is not in the test position

• racking-in of the circuit breaker with the compartment door open

In addition, if the panel is equipped with an earthing switch, the interlocking devices prevent• racking-in of the circuit breaker with the earthing

switch closed• closing of the earthing switch when the circuit

breaker is in connected or intermediate position• opening of the cable compartment door with the

earthing switch open• opening of the earthing switch with the feeder

compartment door open

Padlocks

Each door can be locked in its closed position by means of padlocks.

The operations for circuit breaker racking-in/out and earthing switch opening/closing can be prevented by applying the padlocks to the corresponding insertion slots.

The metallic shutters can be locked by means of two independent padlocks in both the open and closed positions.

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Vacuum Circuit Breaker

MILE switchgear is designed solely for Tavrida Electric advanced vacuum circuit breakers. Tavrida Electric has simplified the mechanical structure of the circuit breaker to the greatest possible degree. It uses three single-coil magnetic actuators, one per pole. All switching elements are assembled along a single axis. All mechanical movements are therefore direct and linear. The three actuators are mounted in a steel frame and are mechanically linked by a synchronizing shaft.

Completely avoided is failure of critical components such as• mechanical latching• gears, chains, bearings and levers• tripping and closing coils• motors to charge springs

The result is up to 150,000 C-O cycles at rated current or up to 100 operations at full short circuit breaking current without the need to replace or adjust any parts. Tavrida Electric vacuum circuit breakers are maintenance free over the total life expectancy of at least 25 years.

Instrument Transformers

The panel is designed to be equipped with current transformers, toroidal current transformers and voltage transformers according to the dimensions of DIN 42600. For other transformers the panel can be adapted on request.

Power Cables

Up to a maximum of 6 cables per phase can be used depending on the unit dimensions and the cable cross-section. Access to the cables is provided either from the front or from the rear. The cables enter the panel from the bottom. Optional top entry design is available.

Surge Arresters

In the cable compartment space is provided for three fixed-mounted surge arresters.

Protection System

A wide range of VAMP (Finland) and MICROELLECTRICA SCIENTIFICA (Italia) protection systems are available as the standard option to ensure easy SCADA integration. Other protection systems from well-known manufacturers can be utilized on request.

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TYPE TESTS

MILE switchgear is fully type-tested according 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 (internal arc classified:

AFLR, 31.5kA/1s)

TYPICAL UNITS

IF - Incoming FeederOF - Outgoing FeederBC - Bus Coupler FeederBR - Bus Riser PanelM - Metering panel

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STP - Service transformer panelBRES - Bus riser panel with earthing switchMES - Metering panel with earthing switchLBSF - Load-break switch with fuses

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OVERALL DIMENSIONS

12-17,5 kV

Depth (mm) 1500

Height (mm) 2200

Width (mm) 1000

800

650

Rated current (A) 630 1250 1600 2000 2500 3150

IF

OF

BC

BR

BRES

M

MES

LBSF*

STP*

*STP and LBSF cubicle width is minimum 800 mm

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24 kV

Depth (mm) 1560

Height (mm) 2200

Width (mm) 1000

800

Rated current (A) 630 1250 1600 2000 2500

IF

OF

BC

BR

BRES

M

MES

LBSF

STP

Rated voltage (Ur) 12kV 17.5kV 24kV

Rated power frequency withstand voltage (Ud) 42kV 42kV 50kV

Rated lightning impulse withstand voltage (peak) (Up) 75kV 95kV 125kV

Rated short-circuit breaking current (Isc) 31.5kA 31.5kA 25kA

Rated peak withstand current (Ip) 83kA 83kA 64kA

Rated short-time withstand current (Ik) 31.5kA 31.5kA 25kA

Rated duration of short circuit current (tk) 3s 3s 3s

Internal arc withstand current, 1s 31.5kA 31.5kA 31.5kA

Rated frequency 50/60Hz 50/60Hz 50/60Hz

Rated feeder current 630A 630A 630A

1250A 1250A 1250A

1600A 1600A 1600A

2000A 2000A 2000A

2500A 2500A 2500A

3150А 3150А -

Standard IEC 62271-200 IEC 62271-200 IEC 62271-200

Degree of protection IP4X (IP41) IP4X (IP41) IP4X (IP41)

Temperature range -40...+55°C * -40...+55°C * -40...+55°C *

Maximum relative humidity 95% 95% 95%

Maximum altitude 1000m a.s.l.** 1000m a.s.l.** 1000m a.s.l.**

TECHNICAL SPECIFICATION

* for EMV protection relays only, other manufacturers: -10°C** For installations at altitudes higher than 1000 m, the insulation withstand level of external insulation at the service location has to be determined by multiplying the rated insulation levels by a factor Ka in accordance to IEC 62271-1.

Version No. 2 of October 2009

This document is copyright and is intended for users and distributors of Tavrida Electric products. It contains information that is the intellectual property of Tavrida Electric and this document, or any part thereof, should not be copied or reproduced in any form without the prior permission of Tavrida Electric.Tavrida Electric applies a policy of ongoing development and reserves the right to change products without notice. Tavrida Electric does not accept any responsibility for loss or damage incurred as a result of acting or refraining from action based on information in this Catalogue.

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