TAVRIDA ELECTRIC SG15 MILE Maintenance Manual
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TAVRIDA ELECTRIC SG15 MILE Maintenance Manual

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SG15_MILE / SG25_MILE
MEDIUM VOLTAGE SWITCHGEAR
MAINTENANCE MANUAL
ISO 9001:2015 certification
ISO 14001:2015 certification

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  • Page 1 SG15_MILE / SG25_MILE MEDIUM VOLTAGE SWITCHGEAR MAINTENANCE MANUAL ISO 9001:2015 certification ISO 14001:2015 certification...
  • Page 2 This document is copyrighted 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 there of, should not be copied or reproduced in any form without prior written permission of Tavrida Electric.

  • Page 3: Table Of Contents

    MAINTENANCE MANUAL TABLE OF CONTENTS ABBREVIATION ............................. 5 MAINTENANCE MANUAL ........................... 6 1. GENERAL ............................6 1.1 Presentation ..........................6 1.2 Applicable standards ........................6 1.3 Degrees of protection ........................7 1.5 Type testing ..........................7 1.4 Normal service conditions ....................... 7 1.6 Routine tests ..........................
  • Page 4 Medium Voltage Switchgear SG15_MILE / SG25_MILE 6. INTERLOCKS AND LOCKING DEVICES ....................31 7. OPERATION ............................ 33 7.1 Withdrawable parts position definitions ................... 33 7.2 Interlocking Conditions ........................ 34 7.3 Interlocks ..........................35 7.4 Locking facilities ......................... 40 7.5 Busbar earthing switch close operation conditions ................40 7.6 Appearance and interface of panel with draw-out unit with circuit breaker (IF, OF, BC, BT) ....

  • Page 5: Abbreviation

    R&D Research and development Surge arrester SCADA Supervisory control and data acquisition SG_Mile Medium-Voltage switchgear Mile series Shell Shell type switching module Switchgear panel Service Transformer Panel AS Tavrida Electric Export Tavrida Electric (registered TM) Vacuum circuit breaker Voltage transformer...

  • Page 6: Maintenance Manual

    Medium Voltage Switchgear SG15_MILE / SG25_MILE MAINTENANCE MANUAL This manual provides information on maintenance and operation of SG_Mile series switchgear. GENERAL 1.1 Presentation The SG_Mile series switchgear is designed for primary distribution networks with rated voltages of 12kV, 17.5kV and 24kV 50/60Hz intended for indoor installation.

  • Page 7: Degrees Of Protection

    MAINTENANCE MANUAL 1.3 Degrees of protection 1.5 Type testing The degrees of protection of the switchgear conforms with IEC The SG_Mile switchgear has successfully passed all the tests 60529 standard. The SG_Mile series switchgear is normally specified by relevant IEC (International Standard) and GOST supplied with the following standard degrees of protection: (state standard of the Russian Federation) standards.

  • Page 8: Routine Tests

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 1.6 Routine tests Routine tests are performed by the assembly factory as specified in the standard IEC 62271-200 to ensure the superior quality of each product delivered to a customer site: Table 1.5. Routine tests Test Dielectric test on the main circuits Tests on auxiliary and control circuits, and verification of...

  • Page 9: Internal Arc Proof

    MAINTENANCE MANUAL 1.7 Internal arc proof The personnel safety factor was a primary goal when SG_Mile The IEC 62271-200 standard describes the test-methods required. The SG_Mile switchgear conforms to all criteria switchgear was designed. Thus, the SG_Mile switchgear has been designed and tested to withstand an internal arc due to a stated in Annex A of the standard: short-circuit current of the same levels as the panel rated breaking currents.
  • Page 10 Medium Voltage Switchgear SG15_MILE / SG25_MILE Medium-Voltage Switchgear SG15_MILE, SG25_MILE Arcing time minimization The energy released in an arc flash is directly proportional to the arcing time (V x I x t), where V is voltage, I - current, t - time. As V x I are given by the service conditions, only the arcing time (t) is changeable.

  • Page 12: Designe

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 2. DESIGNE 2.1 Compartments The SG_Mile switchgear panel is assembled with standard, pre- fabricated, hot-dip zinc galvanized sheet steel units forming a rigid, free standing structure. The switchgear consists of four compartments which are separated from each other by means of earthed metal partitions.
  • Page 13 MAINTENANCE MANUAL 2.1.2 Cable compartment The cable compartment houses the branch connections, earthing busbar, earthing switch, power cables, surge arresters, instrument transformers (current transformers, voltage transformers, zero-current transformers). The cable compartment design allows up to 4 cables per phase connections (in case of the withdrawable voltage transformer truck present) or 7 cables per phase (in case of the voltage transformer truck absent).

  • Page 14: Draw-Out Units

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 2.2 Draw-out units The following types of draw-out units are available: Draw-out unit with Vacuum Circuit Breaker cassette type.  Draw-out unit with Isolating truck cassette type.  Draw-out unit with Voltage Transformers cassette type (for ...

  • Page 15: Main Busbars

    MAINTENANCE MANUAL 2.3 Main busbars The busbar compartment contains the main busbar system connected to the fixed upper contacts of the circuit breaker compartment by means of branch connections. The main busbars are made of electrolytic copper. The maximum rating of busbar system with natural cooling is 3150A.

  • Page 16: Earthing Busbar

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 2.5 Earthing busbar The earthing busbar is made of electrolytic copper. It runs along all adjacent panels and connects to a main substation earthing bar. All current carrying parts are interconnected with each other to equipotential bonding to guarantee personal safety against electric shock.

  • Page 17: Auxiliary Wiring

    MAINTENANCE MANUAL 2.8 Auxiliary wiring Electrical wiring diagrams are the part of switchgear documentation delivered with each order. A complete set of wiring diagrams developed by TEE for a typical substation is available with Protection Relays from other manufacturers. The following options are available: Auxiliary supply voltage: 24 ..

  • Page 18: Doors

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 2.10 Doors The SG_Mile powder coated doors are made of galvanized steel sheets, it provides a rigid structure and is resistant to mechanical stresses. Robust hinges and handles provide for convenient and safe closing. Inspection windows are made of explosion-proof glass, providing maximum safety for personal.

  • Page 19: Top Installation (Voltage Transformer)

    MAINTENANCE MANUAL 2.14 Top installation (voltage transformer) Depending on panel requirements and structure, the busbar earthing switch or voltage transformers can be installed over the top of any panel. A top installed earthing switch can be equipped with support insulators, with capacitive sensors, electromagnet for providing necessary interlocks and signalling.

  • Page 20: Basic Structure

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 3. BASIC STRUCTURE An indoor substation switchboard consists of different numbers and types of SG panels with switching devices, control and protection relays, signaling and metering devices and other auxiliary equipment, which are interconnected by control cabling. The base structure of the typical SG panel is given below.
  • Page 21 MAINTENANCE MANUAL Cross - section: cassette type 1. Voltage transformer 12. Earthing switch (make type) 2. Voltage transformer auxiliary connector 13. Current transformers 3. Support insulator with capacitive sensors 14. Surge arresters 4. Draw-out unit with circuit breaker 15. Bottom with sealed cable entries 5.

  • Page 22: Maintenance

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 4. MAINTENANCE Only authorized persons who have the required knowledge regarding handling of SG15_MILE and SG25_MILE type panels are allowed to provide maintenance and cleaning work. Routine maintenance will depend on the conditions to which the switchgear is subjected to, and to the local relevant codes and practice (i.e.

  • Page 23: Visual Inspection Of All Switchgear Compartments ( Low-Voltage, Circuit-Breaker, Cable, Busbar)

    MAINTENANCE MANUAL 4.1 Visual inspection of all switchgear compartments ( low-voltage, circuit-breaker, cable, busbar) Periodic inspection of the substation and equipment (annual non-invasive) will be necessary to establish the environmental conditions to which the units are subjected, to allow a suitable maintenance schedule to be determined. Consideration should be given to: ...

  • Page 24: Functional Tests

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 4.2 Functional tests Table 4.2.1 Functional tests taken every 3 years Actions to be taken every 3 years Checking ON/OFF operation of VCB in TEST position Checking rack IN/OUT (Test/Service position) operation of VCB Checking for correct operation of circuit breaker mechanical indication Checking rack IN/OUT (Test/Service position) operation of VT Checking ON/OFF operation of earth switch.
  • Page 25 MAINTENANCE MANUAL Table 4.3.1 Lubrication of components taken every 3 years Switchgear Actions to be taken every 3 years compartment & DOU Low-voltage compartment  Greasing of compartment door hinges and locks (if necessary)  Greasing of compartment door hinges and locks (if necessary) ...
  • Page 26 Medium Voltage Switchgear SG15_MILE / SG25_MILE Table 4.3.2 Detailed grease & lubricant location Switchgear Detailed grease & lubricant Switchgear Detailed grease & lubricant compartment location ( marked by red compartment & location ( marked by red & DOU rectangle) rectangle) Number 1 Number 6 Number 2...

  • Page 27: Insulation Resistance Tests

    MAINTENANCE MANUAL 4.4 Insulation resistance tests Test procedure shall be followed as detailed below:  The switchboard shall be cleaned properly. Any dust/foreign particle on insulation bushing are not allowed.  Test leads shall be connected from the back of the switchgear panel through opened rear covers. ...
  • Page 28 Medium Voltage Switchgear SG15_MILE / SG25_MILE 4.6 Power frequency test Test procedure shall be followed as detailed below:  Please make sure that the testing specimen is earthed.  VCB shall be in service position and CLOSED.  Front doors shall be closed. ...

  • Page 29: Troubleshooting

    MAINTENANCE MANUAL Table 4.5.2 Recommended tightening torques for current conducting connections Tightening torque Bolt connection Tightening torque without lubricant, size with lubricant, Nm TROUBLESHOOTING 5.1 Switchgear troubleshooting Switchgear compartment Problem Action to be taken & DOU  Clean door hinges and locks from combination. ...

  • Page 30: Draw-Out Unit Troubleshooting

    Medium Voltage Switchgear SG15_MILE / SG25_MILE  Abnormal sound is appearing in  Check and clean compartment from any compartment contamination and moisture if necessary  Check that the busbar insulation covers are located Busbar correctly (if fitted) compartment  Abnormal visible appearance of ...

  • Page 31: Control Module Troubleshooting

    MAINTENANCE MANUAL 5.3 Control Module troubleshooting Control Module Description Action to be taken to reset (Number of blinks followed by 1,5s interval)  Outage of operating voltage or  Check the auxiliary supply source, its voltage exceeds the prescribed wiring, connection, MCBs condition, value limit value of the voltage supplied ...
  • Page 32 Medium Voltage Switchgear SG15_MILE / SG25_MILE All doors of SG15(25)_Mile switchgear have swing-handles equipped with the key-locks. The earthing switch close/open operations can be prevented by applying the padlocks or castell lock to the corresponding openings or slots. The metal shutters can be locked either together or individually in open and closed positions by means of two independent padlocks.

  • Page 33: Operation

    MAINTENANCE MANUAL OPERATION 7.1 Withdrawable parts position definitions Service position Main circuits are connected Auxiliary circuits are connected The circuit breaker can be CLOSED and OPENED The circuit breaker compartment door is closed and cannot be opened Test position Main circuits are disconnected Auxiliary circuits are connected Intermediate position The withdrawable part is between the service and the test positions...

  • Page 34: Interlocking Conditions

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.2 Interlocking Conditions Panel cassette type Panel Circuit breaker Cable Respective Earthing compartment compartment Busbar CB in Switch with Door with Door Earthing with Mechanical Mechanical Mechanical Operations Switch Interlock Interlock Interlock Test Service Open Closed Open Closed Open Closed Open Closed...

  • Page 35: Interlocks

    MAINTENANCE MANUAL 7.3 Interlocks Interlock 1 It will not be possible to operate the circuit breaker when the circuit breaker is in the intermediate position and vice versa. It will not be possible to rack the circuit breaker in or out, when the circuit breaker is closed. The permission key must be turned 90°...
  • Page 36 Medium Voltage Switchgear SG15_MILE / SG25_MILE Interlock 1 To rack in or rack out the withdrawable unit it is necessary to turn the permission key (1) counter-clockwise 90°. It opens access to the rack-in mechanism (2). If the circuit breaker was closed when turning the key (1), the interlock trips the circuit breaker to prevent a dangerous situation.
  • Page 37 MAINTENANCE MANUAL Interlock 4 When the DOU is racked in, the end of the bracket engaged by the shutter mechanism moves downward and blocks the circuit breaker door hook (6). Interlock 5 When the earthing switch is in the closed position the locking shaft (7) withdraws to slide a joint mechanism and blocks the circuit breaker from being racked in.
  • Page 38 Medium Voltage Switchgear SG15_MILE / SG25_MILE Interlock 8 If the earthing switch operation tool is inserted into earthing switch operating slot, the earthing mechanism's cover (11) blocks opening of the cable compartment door. To open the cable compartment door, the earthing switch operation tool must be removed from the earthing switch slot.
  • Page 39 MAINTENANCE MANUAL Castell key interlock Castell key interlock is a mechanical alternative to an electromagnetic interlock of the draw-out unit and the earthing switch. 1. Castell lock blocks DOU movement from the test position to the service position. Castell lock is located on the draw-out unit as shown on the right: Castell lock Castell key...

  • Page 40: Locking Facilities

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.4 Locking facilities A standard double The earthing switch Live shutters can be securely locked Access to the Access to the bit key lock can be can be locked with in the open and closed circuit breaker or cable low voltage used for locking...

  • Page 41: Appearance And Interface Of Panel With Draw-Out Unit With Circuit Breaker (If, Of, Bc, Bt)

    MAINTENANCE MANUAL 7.6 Appearance and interface of panel with draw-out unit with circuit breaker (IF, OF, BC, BT) Cassette type panel with standard LV compartment interlock interface button Inspection windows...
  • Page 42 Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.6.1 Operations with draw-out unit 7.6.2 Operations with earthing switch Accessories: Accessories: Key 1 – Key 2 – for racking in and racking out draw-out unit Draw-out unit interlock Key 3 – Earthing switch operating tool - SGcomp_Lever_Mile SGcomp_Lever_Mile SGcomp_Lever_Mile(ESHandle)

  • Page 43: Appearance And Interface Of Panel With Dou And Without Circuit Breaker (Mes, M, Bres, Br, Brm)

    MAINTENANCE MANUAL 7.7 Appearance and interface of panel with DOU and without circuit breaker (MES, M, BRES, BR, BRM) Cassette type panel with standard LV compartment Nameplate TECHNICAL DATA Draw-out unit interlock interface Inspection windows Draw-out unit operation slot Earthing switch operating slot Ventilation channel...
  • Page 44 Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.7.1 Operations of switchgear with DOU and 7.7.2 Operations with busbar earthing switch without circuit breaker Accessories: Accessories: Key 2 – for racking in and Key 1 – racking out the draw-out unit - Draw-out unit interlock Key 3 –...

  • Page 45: Load-Break Switch Panel Lbsf

    MAINTENANCE MANUAL 7.8 Load-break switch panel LBSF Nameplate TECHNICAL DATA Load break switch operation interface 1. Attach the operating lever to the mechanism's shaft. 2. Pull back the operation sleeve. 3. Close or open the switch disconnector depend on its Earthing switch operation interface Inspection window...
  • Page 46 Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.8.3 Load-break switch panel LBSF with motor operating device NSW30 Load break switches and earthing switches are available with motor drive in LBSF panel. Motor operating device type NSW30 is designed for application within the medium voltage switchboard. The motor operating device can be operated manually or via remote control.
  • Page 47 MAINTENANCE MANUAL Enclosure: The enclosure - 1 is made of painted sheet aluminium. Its cover is bolted on with four pieces M2.9 bolts - 12. In the lower part, a 14mm cable choke will be found. It allows control and supply conductor connection. Manual operation In the case of manual emergency operation, the following procedure should be followed:...

  • Page 48: Service Trolley Operation

    Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.9 Service trolley operation For the convenience of transportation, inserting and withdrawal of all types of DOUs, TEE has designed a Service Trolley. It is intended for application for both the circuit breaker compartment and the cable compartment DOUs. The service trolley has 2-level adjustable ramps.
  • Page 49 MAINTENANCE MANUAL Openings for sliding locks Circuit breaker compartment ramp Adjustment facilities for the upper ramp Place for voltage transformer ramp Voltage transformer ramp Service trolley guides Wheels...
  • Page 50 Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.9.1 Inserting the draw-out unit to the panel Open the switchgear door. • Position trolley in a such way that trolley guides are directed • into the guide openings of the panel. Adjust the height of the ramp, if needed.
  • Page 51 MAINTENANCE MANUAL 7.9.2 Removing the draw-out unit from the panel • Open the switchgear door. Disconnect the auxiliary plug. The DOU is in the isolated • position. Move the trolley close to the panel as described above. • In order to release DOU from the compartment, slide 2 •...
  • Page 52 Medium Voltage Switchgear SG15_MILE / SG25_MILE 7.10 Current transformer replacement (front access only) General view of upper and lower branch busbars system, connected with current transformers (cassette type) insulators 1. Make sure that the draw-out unit is in test position and circuit breaker is opened. 2.
  • Page 53 MAINTENANCE MANUAL 6. Disconnect power cables. Remove them carefully to cable cellar. Nut DIN934 M 10 7. Remove isolating barriers fixed between phases. 8. Dismantle the lower busbars. Remove all current transformer lower busbars bolts. ...
  • Page 54 Medium Voltage Switchgear SG15_MILE / SG25_MILE Remove the bolt, that holds the lower busbars to the support insulator. Continue for all phases.  (the busbar must be supported by hand, otherwise it may fall when all bolts are removed). 9. Disassemble the upper busbars. Open the circuit breaker compartment door.
  • Page 55 MAINTENANCE MANUAL Remove upper connection bolts.  (the busbar must be supported by hand, otherwise it may fall when all bolts are removed). Washer DIN125 A13 Spring washer DIN 127 A12 Bolt DIN912 M12 x 40 10 . Disconnect the secondary cables from CT secondary terminals.
  • Page 56 Medium Voltage Switchgear SG15_MILE / SG25_MILE 11. Disconnect the current transformers from mounting plate. Remove lower bolts (2 pcs).  Lower edge CT mounting plate Remove upper bolts (2 pcs), holding the current transformer to the mounting plate with one hand(lower edge of the mounting ...

  • Page 57: Disposal

    MAINTENANCE MANUAL 7.11 Set of tools DOU operation tool DOU interlock key Earth switch operation tool SGcomp_Lever_Mile(DOUHandle) SGcomp_Lever_Mile(DoubleBit5) SGcomp_Lever_Mile(ESHandle) If the malfunction can not been determined and failure cannot be eliminated, please contact your nearest TEL office. 7.12 Opening the cable and circuit breaker compartment doors in case of emergency. Interlock bypass. Put M4 hex key into the When hook is released the opening and unscrew...
  • Page 58 Medium Voltage Switchgear SG15_MILE / SG25_MILE...
  • Page 59 1. 28.01.2020 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.

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Sg25 mile

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