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8 MNS-SG Operation and Maintenance | Manual

1.4.

MNS-SG standard configuration

1.4.1.

Structure description

The switchgear assembly consists of one or more metal-

enclosed vertical sections. Each vertical section is divided

into several areas: The instrumentation/ device

compartment in the front of the section, the bus

compartment in the middle and the cable compartment for

the end terminal connections at the back.

A continuous horizontal ground bus, running from the

front to the back of the section, is located at the bottom of

all sections.

End sections are designed to allow for the addition of
future sections.

The switchgear may accept power cable entry from the
top, bottom or both. Bus duct or closed-couple
connections are also an option.

The base channel is an optional feature to use to install the
SG in its final location. It will raise the units by 1.5 inches. It
is an alternate method to weld the base channel to a metal
structure.

The channel shall get the equipment off the ground so the
doors can open properly without hitting the floor.

When the base channel option is selected there are rodent
barriers attached to the side of the SG. All openings in the
enclosure are limited by the IP20 rating; this will be enough
protection to prevent vermin, rodents and snakes from
entering the switchgear from the top, bottom and sides of
the equipment.

Lifting angles are provided to allow lifting by crane.

1.5.

Labels and markings

The switchgear is provided with several nameplates and labels

that d

isplay data related to the equipment’s electrical ratings

and the specific application or installation.

1.5.1.

Switchgear lineup label

Sections are organized side-by-side in a lineup that has a
metallic master label. This master nameplate is attached to
Section 1.

1.5.2.

Cubicle/device label

Each cubicle and device has a label located on a visible area,
which displays the approval agency marking.

1.6.

Mechanical design

1.6.1.

Section arrangement

Vertical sections are composed of the following three main
compartments:

Device compartment: Composed of up to four vertical
locations that house the installed devices, which are the main
functional elements of the switchgear.

Rear doors or rear covers /

Cable compartment

Cable supports

Instrument Auxiliary /

Empty compartment

Top horizontal

Wireway door

Lifting angles

Chimney

Breaker

compartment

Top covers

Main horizontal bus system

Bottom plates

Base channels

Lateral segregation barrier /

Compartment barrier

Bottom horizontal

Wireway door

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Содержание MNS-SG

Страница 1: ... ABB DISTRIBUTION SOLUTIONS Operation and Maintenance Manual MNS SG Low Voltage Metal Enclosed Drawout Switchgear ...

Страница 2: ...2 MNS SG Operation and Maintenance Manual ...

Страница 3: ...on guidelines 26 4 3 Section installation sequence 26 4 4 Install and connect shipping splits 26 4 4 1 Position shipping splits 26 4 4 2 Connect sections 26 4 5 Splice horizontal busbars 27 4 6 Splicing Ground Busbar 29 4 7 Attach switchgear to the floor 30 4 8 Attach overhead lifting device 30 4 8 1 Operating overhead lifting device 32 4 9 Connect cable and wiring 32 4 9 1 Install connections gen...

Страница 4: ...current and or voltages that exceed its limits Follow your company s safety procedures Do not remove covers open doors or work on equipment unless power has been turned off and all circuits de energized All components should be electrically disconnected by means of a visible break securely grounded and locked out and tagged in accordance with precautions stated in ANSI Standard Z244 1 Control of H...

Страница 5: ...rer reserves the right to make changes at any time without notice Safety notations alert personnel to possible death injury or property damage situations The following four safety notations and words are used in the manual to indicate the degree of hazard that may be encountered by the user These words and safety notations are as follows Danger Indicates an imminently hazardous situation which is ...

Страница 6: ...s is located in the busbar compartment segregated from the device compartment 1 2 Component names This manual uses the following naming conventions Blank unit An empty compartment Compartment Sections are typically divided into three compartments Device busbar and cable See Mechanical Design Section Arrangement Cubicle See section Device An instrument compartment breaker compartment empty compartm...

Страница 7: ...nical features Dimensions Height in mm 90 6 2 300 without chimney plenum or top hat Width in mm 23 6 600 27 6 700 31 5 800 39 4 1 000 19 7 500 transition section Depth in mm 72 9 1 852 80 8 2052 Basic unit grid size E approximately 1 0 inch 25 mm Surface protection Frame Alu zinc coated galvanized stainless steel Internal subdivision Alu zinc coated galvanized stainless steel Transverse section Ga...

Страница 8: ...he SG All openings in the enclosure are limited by the IP20 rating this will be enough protection to prevent vermin rodents and snakes from entering the switchgear from the top bottom and sides of the equipment Lifting angles are provided to allow lifting by crane 1 5 Labels and markings The switchgear is provided with several nameplates and labels that display data related to the equipment s elec...

Страница 9: ...zontal busbar is located at the bottom of each section The phase arrangement of 3 phase horizontal busbar and vertical busbars is A B C from top to bottom or left to right as viewed from the front The busbar systems are installed in the lower level busbar compartment The tie busing will be installed at the upper level Bus Phases Cable Compartment Bus Bar Compartment Device Compartment Segregation ...

Страница 10: ...vided in the busbar compartment above the lower A phase horizontal busbar For four wire systems that have no line to neutral load requirements an incoming neutral connection point can be provided to facilitate the power system grounding connection but without neutral horizontal or distribution busbars are provided 1 7 3 Ground bar A continuous sectionalized bare copper ground bus rated 1 000A is p...

Страница 11: ... Locations A B and D may contain feeders equipped space control or blank Location C may contain main tie feeders or equipped space feeders Breaker unit instruments installed on the doors may include only pilot lights push buttons control switches and maintenance switches In addition to the items listed above instrument compartments may also include ammeters voltmeters high resistance grounds HRGs ...

Страница 12: ...covers or single double full height hinged doors The doors swing open 120 for maximum accessibility Cable compartment may have an optional cable support structure which is adjustable in vertical and horizontal position 1 9 2 Top horizontal wireway The MNS SG has a 3 9 in 100 mm high 17 7 in 450 mm deep top horizontal wireway This wireway provides the space for interconnection wiring It is covered ...

Страница 13: ...cture This frame includes stainless steel parts also in some cases and purpose is to minimize generation of magnetic fields in the structure When a seismic structure is required a specific sub frame is available Basically additional plates are included to give stiffness to the structure This assembly includes also two side walls which are mounted in the device compartment these are used to segrega...

Страница 14: ...vert the plenum NOTE The rear exhaust plenum is not available with top cable entry switchgear Before beginning the installation identify the location where the plenum will vent outside of the switchgear room The exhaust must be directed to a location where it will not cause injury or damage See Positioning Arc Resistant Switchgear Create the necessary opening in the wall Calculate the number of ex...

Страница 15: ...lace with 10 M6 1 x 16 bolts using the supplied washer and nuts for each bolt Attach end cover 5 After installing the top and end covers install the extension connection on the plenum Attach the extension to the switchgear section frame using four M6 x 16 screws Torque to 3 5 ft lbs 4 7 Nm 6 Attach the extension connection to switchgear frame with 4 M6 x 16 screws and to the top cover with 10 M61 ...

Страница 16: ...um will be attached 2 Install the top cover on the section where the rear exhaust will vent from the lineup This cover is the same as the others but the back side is removed to allow the gas to flow out of the lineup Top cover Rear exhaust 3 Install the top covers over each cable compartment of the lineup securing them with the six M6 x 16 screws supplied with each section Torque to 3 5 ft lbs 4 7...

Страница 17: ...mm or 39 4 in 1 000 mm wide sections install a rear plenum transition to compensate for the width difference to the rear extension 8 Attach the extension connection to switchgear frame with four M6 x 16 screws and to the top cover with 10 M6 x 16 bolts using the supplied washers and nuts for each bolt Torque all to 3 5 ft lbs 4 7 Nm Top cover rear exhaust 9 Attach the end flaps to connect the plen...

Страница 18: ...talling this switchgear you must provide the following clearances The switchgear must be at least three feet from the walls to either side and behind the switchgear There must be at least 4 0 in 100 mm clearance around the plenum and extensions The plenum must direct the exhaust outside of the building Designate a safe area adjacent to the outlet from the plenum This safe area must be 6 0 X 6 0 ft...

Страница 19: ...1292 mm x 2576 mm for 1852 mm depth 90 in x 51 in x 101 in 2307 mm x 1292 mm x 2576 mm for 2052 mm depth Packed in crate for two sections up to 1400 mm 83 in x 63 in x 101 in 2107 mm x 1608 mm x 2576 mm for 1852 mm depth 90 in x 63 in x 101 in 2307 mm x 1608 mm x 2576 mm for 2052 mm depth Packed in crate for three sections up to 1800 mm 83 in x 79 in x 101 in 2107 mm x 2000 mm x 2576 mm for 1852 m...

Страница 20: ...A N A lbs 718 6 749 4 383 8 403 4 491 2 515 7 N A N A N A N A N A N A 700 27 5 in kg 345 5 360 2 182 0 191 9 230 8 243 4 N A N A N A N A N A N A lbs 761 7 794 0 401 1 423 1 508 8 536 6 N A N A N A N A N A N A 800 31 5 in kg 374 8 390 1 N A N A N A N A 412 6 434 2 N A N A N A N A lbs 826 3 860 0 N A N A N A N A 909 6 957 2 N A N A N A N A 1000 39 4 in kg 413 1 429 7 N A N A N A N A N A N A 615 8 64...

Страница 21: ...tallation If there will be a delay in installing the switchgear retain the necessary packing materials to store it safely See Temporary Storage 3 4 Unload and move switchgear components Unload the sections or shipping splits as close to the installation site as possible to minimize additional transportation Place the shipping splits on a flat surface When moving the sections or shipping splits kee...

Страница 22: ... cubicles have to be transported only in the vertical position Tilting and canting must be avoided Crane transport transport unit unpacked Cubicles may easily tip over when transported with a hand pulled truck Therefore the distance between the wooden cross beam or the pallet and the underground should not be more than 3 mm Roller transport Crane transport transport unit in box Fork lift transport...

Страница 23: ...ith lifting angles Shipping units with one two or three sections are equipped with single angles on each corner of every shipping section Frame corner joint with lifting angle Tilting danger signs must not be removed before all cubicles have been secured to the foundation Do not put the switchgear down on one edge because of the danger of considerable mechanical damage Sling placement on SG Lift u...

Страница 24: ...5 C 95 F and 40 C 104 F to help drive off condensation Do not omit the use of appropriate personal protective equipment PPE necessary to do the connections of the power supply of the heaters If the switchgear will not be installed soon after arrival cover the sections to protect them During the operation of the heaters these must be monitored to avoid any damage that may cause a fire Check once pe...

Страница 25: ...The installation must meet the following requirements Indoor location protected from moisture and dramatic temperature changes For longest equipment life install the switchgear in an enclosed room with temperature and humidity control and filtered and forced air ventilation Level the site preferably including a base frame that is either embedded in the concrete floor or rests on a false floor on s...

Страница 26: ...g must match and the related drawings must be updated When adding removing or rearranging sections do not exceed the maximum amperage available on the horizontal bussing 4 4 Install and connect shipping splits NOTE Diagrams showing the location of fasteners and the appropriate torque values can be found in the Torque Table section of this manual 4 4 1 Position shipping splits Remove the shipping s...

Страница 27: ...manual for more The bus in each section is designed to allow splicing with the bus of the adjacent sections to create a continuous horizontal bus The splice links are located on the right hand side for the neutral and phase A and on the left hand side for phase B and C of each section They are slid to the right or left to connect the bus to the adjacent section 1 After installing and connecting th...

Страница 28: ...e the rear cover GPO3 or metal sheet to access the Main Bus bar area Copper bars and cover to be removed The only space for access to the connections and put the hand and the torque wrench is between Phase B Phase C also between Phase A and Neutral bus bar Access for connect the links of Bus Bars The maximum gap between the left and right busbar is 0 9 in 0 1 25 mm 3 ...

Страница 29: ...properly torqued 4 Frame Connection Torque Marks NOTE To connect the Neutral Bus Bar if provided remove the black support the red spacers of GPO3 at the end of the Bus Bar those pieces sometimes are installed additionally but they are not necessary Repeat this process for all of the splice kits including the neutral bus if provided Splice links are provided on the right hand side of each section f...

Страница 30: ...ing lightly with a fine grain aluminum oxide paper 4 6 Splicing Ground busbar The horizontal ground bus must be spliced between adjacent sections Splice links are also provided on the right hand side of each shipping section and may be loosened and bridged to the adjacent section Ground Bus Bar The ground bus bar is designed to use one single bar across the sections or the shipping pallet this bus...

Страница 31: ... Bolted to floor channels Bolted to a false floor A minimum floor height of 20 0 in 500 mm is recommended to accommodate the bending radius of the cables and provide adequate accessibility The false floor must have a carrying capacity of 20 kN m2 2 9 PSI compression load from top to bottom Attach the sections using four bolts through the holes in the section base to the floor or base frame Use M8 ...

Страница 32: ...loosely secure the locator plates in place with the bosses in their mating holes Adjust the rails 4 After mating all locator plates in place with the rails secure the locator plates and the rails 5 Position overhead lift device on the tines of forklift Raise the overhead lift device up to the rails on the frame Raise lift device Align wheels on the front rail and behind the rear rail Adjust the up...

Страница 33: ...ble make sure the temperature is above 32 F 0 C unless the cable is appropriate for installation at lower temperatures On every connection verify the compatibility of wire size type and stranding for the type of power terminations lugs or terminals Use correct lugs in all applications Crimp compression lugs with the manufacturer recommended tools Properly connect all line and load cables to avoid ...

Страница 34: ...ns refer to the elevation and floor plan drawings shipped with the switchgear Section width Contt current Vertical runback coupling Number of lugs Size of lug connector 600 1200 2 x 1 4 x 3 4 2 x 1 4 x 3 700 800 1000 600 1600 2 x 1 4 x 4 5 2 x 1 4 x 4 700 800 1000 E4 2 breaker connection table 1600A and 2500A Section width Contt current Vertical runback coupling Number of lugs Size of lug connecto...

Страница 35: ...Manual MNS SG Operation and Maintenance 35 Top and floor cable cutouts ...

Страница 36: ...following their guide 4 9 5 Connection to external control source if required If an external control source is used it should be stable and not subject to variations Consult your ABB representative for minimum VA requirements Terminals for external control sources will usually be provided in the top or bottom wireway of the first or last section of the lineup See the switchgear drawings for more d...

Страница 37: ...r arc resistant switchgear Ensure that the flaps on the chimney are closed These flaps are hinged and can be pushed closed by hand Push to open flaps Ensure that the flaps on the rear covers doors are open To open the covers push the flap stopper until it contacts the cover door Rear flaps in closed position Rear flaps in open position If the switchgear is equipped with a plenum ensure that the en...

Страница 38: ...sent verify that current transformers are properly connected or short circuited If an external control voltage is present verify that it is OFF Close and latch all doors Test electrical insulation resistance Conduct the test phase to phase phase to ground and when applicable phase to neutral Conduct the test with all unit disconnects in the OFF position If the switchgear is equipped with potential...

Страница 39: ...wer transformers in the switchgear remove all fuses in the transformer circuits On electrically operated circuit breakers discharge the springs and the motor disconnect switch should be in the OFF position 5 Rack drawout breakers to the DISCONNECT position 6 Open all normal control power source disconnects if supplied 7 Check each control switch or push button Make sure that they are in the OPEN p...

Страница 40: ...incoming bus to the switchgear main circuit breaker Observe if operation of instruments and relays is correct 2 Energize the separate control power source if furnished 3 Energize the switchgear main bus by closing the main circuit breaker Observe if operation of relays and instruments is correct 4 If applicable close feeders and tie circuit breakers 5 Verify that all door panel screws are tight 6 ...

Страница 41: ...re When heat damage is observed it typically indicates damage to the component Repair or replacement may be required 6 3 Remove insert withdrawable breaker For information on how to remove or insert a breaker reference the specific instructions regarding breakers in document 1SDH001000R0002 Emax 2 UL Listed Breaker Installation Service and Maintenance Instructions You may need to withdraw or remov...

Страница 42: ... that no feedback conditions exist Limit the use of solvents to removing grease and contamination from primary conductors insulation and from unpainted metallic surfaces Do not use alcohol or Freon Use OSHA approved solvents in accordance with local regulations Use a non flammable solvent with a threshold limit of 300 PPM or higher Use solvents in well ventilated areas 6 7 1 Semi annual inspection...

Страница 43: ...or Electrical Safety Requirements for Employee Workplaces NEC Article 110 16 Flash Protection Switchboards panelboards industrial control panels and switchgears that are in other than dwelling occupancies and are likely to require examination adjustment servicing or maintenance while energized shall be field marked to warn qualified persons of potential electric arc flash hazards The marking shall...

Страница 44: ...clude an integrated thread coating that ensures they will remain at the torqued valued Once torqued to the proper value draw a line across the fastener head and the surrounding metal surface so you can visually check whether the fastener has changed position and may require attention Bolts torqued at the factory will be marked in the same way The following torque tables apply to horizontal and ver...

Страница 45: ...30 Copper support for grounding M8 30 22 Insulating barrier and support connections GPO3 glastic inserts M6 20 15 GPO3 glastic Iron M6 20 15 GPO3 glastic Iron M8 25 18 GPO3 glastic brass M8 25 18 GPO3 glastic copper M12 50 37 Exterior metal panels and enclosures Iron iron M8 20 15 Iron iron M6 Self tapping 4 7 35 Insulators iron M12 60 44 Insulators copper M12 50 37 MBB and Insulators M12 Hexagon ...

Страница 46: ...ation supports torque Frame and enclosure fasteners torque Main busbar coper to coper torque M12 Hexagon head screw full thread Torque 60 Nm 44 ft lbs M12 Hexagon head screw full thread Torque 70 Nm 52 ft lbs M6 Pan head Self tapping screw Torque 4 7 Nm 3 5 ft lbs ...

Страница 47: ...sive or covering all contingencies No warranties expressed or implied including warranties of fitness for a particular purpose or merchantability or warranties of fitness for a particular purpose or merchantability or warranties arising from course of dealing or usage of trade are made regarding the information recommendations descriptions and safety notations contained herein In no event will ABB...

Страница 48: ... has been taken to ensure that the information contained in this publication is correct no responsibility can be accepted for any inaccuracy The Company reserves the right to alter or modify the information contained herein at any time in the light of technical or other developments Technical specifications are valid under normal operating conditions only The Company does not accept any responsibi...

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