ABB MNS R System Manual

Brand: ABB

Model: MNS R

Type: System Manual

Document ID

MNS R - Main distribution switchgear

System Guide

ABB SACE 1

MNS R

main low voltage

distribution switchgear

Index

General

Introduction .................................................................................................................................2

Technical data ............................................................................................................................. 3

Construction and functional characteristics

Switchgear frame ........................................................................................................................ 4

Earthing ...................................................................................................................................... 4

Circuit-breakers used .................................................................................................................. 5

Circuit-breaker compartment ...................................................................................................... 5

Instrument compartment ............................................................................................................. 6

Busbar compartment ..................................................................................................................7

Main busbars .............................................................................................................................. 7

Distribution busbars .................................................................................................................... 8

Cable compartment ....................................................................................................................9

Segregation forms ..................................................................................................................... 10

Construction forma type ............................................................................................................ 10

Typical units and cross-sections ................................................................................................12

Ventilation ................................................................................................................................. 13

Standardisation

Typical configurations ................................................................................................................ 14

Switchgear depth ......................................................................................................................16

Versions

Available versions ......................................................................................................................17

Arc-proof .................................................................................................................................. 17

Power Motor Control Center integrated solutions ...................................................................... 17

Intelligent switchgear .................................................................................................................20

Installation

Fixing the units to the floor ........................................................................................................22

Tests and certifications .........................................................................................................23

ABB PC30 23-11-2009, 8:121

2 ABB SACE

General

Introduction

The MNS R main low voltage distri-

bution switchgear with rear access

had been studied for installation in

large electrical plants, such as petro-

chemical plants, steel works, rolling

mills, power stations, oil rigs, ships,

etc.

The service conditions on these plants

are often extremely severe: the high

currents involved and the effective

short-circuit levels require high per-

formances switchgears. Furthermore,

must be guaranteed personnel safety,

service continuity, easy inspection,

maintenance, erection and installa-

tion. Easy extension applications as

well as compact overall dimensions

are a must. The Power Center MNS

R switchgear fully complies with all

these requirements. In addition to

that, due to a perfect integration with

all the latest generation of ABB appa-

ratus, it easily meets all market re-

quirements.

ABB PC30 23-11-2009, 8:122

ABB SACE 3

Technical data

Reference Standards ABB SACE L.V. MNS R switchgear

Standards conformed to CEI EN 60439-1, IEC 439-1

Test certification Test certificates ABB SACE, ACAE LOVAG and SINAL

Electrical Data Rated voltages Rated insulation voltage up to 1000 V AC 1500 V DC

Rated service voltage Ue up to 690 V AC 750 V DC

Rated frequency 50 - 60 Hz

Impulse withstand voltage 12 kV

Rated currents Main busbars:

Rated current up to 6300 A

Rated peak withstand current up to 220 kA

Rated short-time withstand current (1s) up to100 kA

Distribution busbars:

Rated current 630÷4000 A

Rated peak withstand current 220 kA

Rated short-time withstand current (1s) 100 kA

Arc-proof Values 100 kA, 0,3 s. at IEC 61641 (on request)

Mechanical Dimensions Height 2200 mm

characteristics

Widht 300, 400, 600, 800, 1000, 1200 mm

Depth 1025, 1200, 1400, 1600 mm

Module base (height) E = 25 mm DIN 43660

Surface protection Frame Al-Zn galvanisation

Internal divisions Galvanised sheet UNI EN 10130

Transversal section Electrolytic galvanisation UNI ISO 4520

Housing (doors and external curtain panels) Painting RAL 7035

Degrees of protection With door open IP20

IEC 529, EN 60529 Standards

With door closed IP30 standard, up to IP 54

Construction form 3a, 3b, 4b

Normal conditions Installation internal for service

Ambient temperature -5 °C; +40 °C

Relative humidity max. 50% at 40 °C

Max. altitude ) 2000 m

Extra options Paint External protection colour on request

Busbar system Main and branch busbars

sheathed busbars, treated busbars (Ag/Sn)

Forms of segregation According BS 60439-1 4b type 1÷7

ABB PC30 23-11-2009, 8:123

415 V

4 ABB SACE

Construction and functional characteristics

Switchgear frame

The MNS R frame is based on

modular 2 mm thick still C sec-

tions, pre-drilled at a pitch of 25

mm. Each unit is based on

modular elements and consists

of:

– circuit-breaker compartments

– instruments compartments

– busbar compartment

– cable compartment.

All compartments are meccani-

cally segregated from the others.

The switchgear is pre set for

easy extensions on both sides.

Earthing

The switchgear is provided with a

continuous electrolytic copper earth-

ing busbar, with a cross-section suit-

able for the proper switchgear short-

circuit rating and pre-set on both

sides for connection to the earthing

network.

Are connected to the earthing busbar

- all the metallic structures of the indi-

vidual units;

- all not live metallic parts of the cir-

cuit-breakers;

- all CTs and VTs secondary earthing

connections.

All others not live metallic parts of the

apparatus are connected to the earth-

ing busbar by means of the unit me-

tallic structure.

The doors with apparatus installed are

connected to the structure by means

of flexible copper braids. All the

ground connections are made with

screws or bolts provided with gripping

washers.

ABB PC30 23-11-2009, 8:134

ABB SACE 5

Circuit-breaker compartment

The compartment is suitable to accept both air and

moulded-case circuit-breakers and it is accessible from the

front side by means of a locked hinged door. The circuit-

breakers can be installed in all the available versions, fixed,

plug-in and withdrawable. With all the widrawable circuit-

breakers, in order do guarantee the maximum safety level

to the operator, the apparatus handling can be carried out

with the door closed.

Circuit-breaker compartment with EmaxCircuit-breaker compartment with Isomax

Circuit-breakers used

System Pro M modular circuit-breakers (MCBs)

SACE Emax air circuit-breakers (ACBs)

SACE Isomax S moulded-case circuit-breakers (MCCBs)

Tmax moulded-case circuit-breakers (MCCBs)

ABB PC30 23-11-2009, 8:135

6 ABB SACE

Construction and functional characteristics

Instrument compartment

The instrument compartment as well

is located in the front side of the

switchgear and it is accessible by

means of a locked hinged door. It can

be dedicated to each functional unit

or be common to several ones. The

measuring instruments, protection re-

lays, control and signalling devices are

normally mounted on the door,

whereas any other auxiliary appara-

tus, such as miniature circuit-break-

ers, protection fuses and auxiliary re-

lays are placed inside the compart-

ment. Apparatus wiring is made with

flexible copper cables and arranged

in dedicated wiring channels. Each

circuit-breaker terminal blocks are

separated from the others and prop-

erly identified.

Internal compartment with auxiliary apparatus and terminal boxes

Instrument compartment with protection relay mounted on the door

ABB PC30 23-11-2009, 8:136

ABB SACE 7

Busbar compartment

The busbar compartment is located

in the middle section of the

switchgear. Main busbars can be lo-

cated at the top, in the centre or at

the bottom of the panel depending on

the selected design and they distrib-

ute the power to the various

switchgear panels. In some of the ex-

isting configurations main busbars

can be directly connected to a circuit-

breaker as well. Distribution busbars

are located into the single column and

positioned vertically to feed panel cir-

cuit-breakers. The busbar system can

be composed by 1, 2 or 3 busbars

per phase, according to requested

rated current, short-circuit level and

operational ambient conditions in

terms of temperature, altitude and

humidity. Busbars are normally bare

copper made, on request can be suit-

ably treated with tinning, silver-plating

and/or sheathing.

Main busbar system with connections for incoming busbars and bus-tie from the top

Main busbars

MNS R main busbars are available for

currents up to 6300 A. Main busbars,

as well as distribution busbars, can be

completely segregated. Each MNS R

panel can be fitted with three busbar

systems at the same time (top-cen-

tre-bottom) each segregated from the

others.

Detail of a compartment with entry from the top and connection on the main busbar system

ABB PC30 23-11-2009, 8:137

8 ABB SACE

Construction and functional characteristics

Distribution busbars

MNS R distribution busbars are avail-

able for currents up to 4000 A. Distri-

bution busbars, branched directly

from main busbars, are vertically in-

stalled either on the right or on the left

in the column. They are feeding out-

going circuit-breakers, and are con-

nected to them by means of rigid or

flexible copper busbars, or cables. In

any case, all the connections are suit-

ably sized to withstand the thermody-

namic stresses of the fault currents.

Busbar distribution system with connections to the outgoing circuit-breakers made with copper

busbars and cables.

Cable

connections

Copper busbar

connections

ABB PC30 23-11-2009, 8:138

ABB SACE 9

Cable compartment

The cable compartment is located in

the rear side of the panel and and it is

accessible by means of a locked

hinged door or a removable bolted

door.

Its purpose is to contain:

– power terminals

– outgoing cables

– current reducers

– auxiliary terminal boxes (if any).

Removable

sheets

for cable

entry

Distribution

busbars

Connection

terminals

ABB PC30 23-11-2009, 8:139

10 ABB SACE

Construction and functional characteristics

Segregation forms

The MNS R segregation forms are

compliant with the relevant standard

IEC 60439-1 annex D. The purpose

of the segregations is mainly to allow

safety access to the internal parts of

the switchgear to operational person-

nel and to minimize propagation of

any faults it may happen in the circuits

and in the adjacent compartments, to

the benefit of service continuity of the

installation.

Form 4b, rear side.

Both main and distribution busbars are metallically segregated, plastic covers are used for cable

connections.

Form 1 No segregation

Form 2a Segregation of the busbars from the functional units; terminals are not separated from the busbars

Form 2b Segregations of the busbars from the functional units; the terminals are separated from the busbars

Form 3a Segregations of the busbars from functional units and between functional units; segregation of the terminals

from the functional units, but not from the busbars; terminals not separated from each other

Form 3b Segregations of the busbars from the functional units and between functional units; segregation of the

terminals from the functional units and from the busbars, but not from each other

Form 4a Segregations of the busbars from the functional units and between functional units; segregation of the

terminals from the functional units and from the busbars; the terminals for external conductors are in the same

compartment as the associated functional unit

Form 4b Segregations of the busbars from the functional units and between functional units; segregation of the

terminals from the functional units and from the busbars; the terminals for external conductors are not in the

same compartment as the associated functional unit

Form 4b, rear side Both main and distribution busbars are metallically segregated, plastic covers are used for cable connections.

Construction forms type

ABB PC30 23-11-2009, 8:1410

ABB SACE 11

Form 3a

Construction solution of one unit with moulded-case

circuit-breaker in form 3a

View from the top of a column with moulded-case

segregated circuit-breaker in form 3a

Form 3b

Construction solution of one unit with moulded-case

circuit-breaker in form 3b

View from the top of a column with moulded-case

segregated circuit-breaker in form 3b

Form 4b

Construction solution of one unit moulded-case

circuit-breaker in form 4b

View from the top of a column with moulded-case

segregated circuit-breaker in form 4b

MNS R form 3a, 3b and 4b construction solutions

ABB PC30 23-11-2009, 8:1411

12 ABB SACE

Construction and functional characteristics

Typical units and cross-sections

The ABB MNS R switchgear is de-

signed for the installation of ABB

Emax air circuit-breakers as well as

ABB Tmax and Isomax moulded-

case circuit-breakers, in all the avail-

able versions, fixed, plug-in and with-

drawable. It allows installation of the

main ABB apparatus and of the

measuring and protection instruments

available on the market, according to

different design requirements.

Construction solutions with ABB

Emax air circuit-breakers and ABB

Isomax and Tmax moulded-case cir-

cuit-breakers

Emax air circuit-breakers panels are

available with both top and bottom

entry design.

For modules sizing, please refer to ta-

bles at page 15.

Tmax and Isomax moulded-case cir-

cuit-breakers are installed horizontally

and vertically as well in the unit.

For modules sizing, please refer to ta-

bles at page 14.

The bus-duct can easily be connected to the busbar

system of the circuit-breakers in the switchgear.

Typical realisation of a structure with Emax circuit-breaker

connected in the top part to a bus-duct.

Typical section with two superimpo-

sed Emax air circuit-breakers. The

circuit-breaker placed in the bottom

is an incoming/outgoing feeder

that can be provide with cable as

well as bus-duct connection.

The circuit-breaker placed on top

of the feeder is a bus-tie and

it connects the two main

busbar systems

The switchgear allows the installation of bus ducts with various current carrying capacities

ABB PC30 23-11-2009, 8:1412

ABB SACE 13

Ventilation

The ABB MNS R switchgear have

been studied to create separated air

flows for all the internal compartments

in order to guarantee an efficient natu-

ral ventilation to all the installed com-

ponents. Ventilation grides for natural

cooling are placed on the front and

rear side of the the panel on both, top

and bottom positions, and on the roof

as well.

A= Apparatus area

B= Busbar area

C= Cable area

Diagram of natural ventilation of the unit

ABB PC30 23-11-2009, 8:1413

14 ABB SACE

B1 B4

A1 A4

Standardisation

Typical configurations

The ABB MNS R switchgear has great

application flexibility. Several assembly

configurations are possible, for incom-

ing, outgoing and bus-ties.

Some examples are given below:

Typical Incoming/Outgoing solutions

for 5000/6300 A main busbar system

Typical Incoming/Outgoing solutions

for main busbar system up to

4000 A

Depth: 1200-1400-1600

PC 3.0 PC 3.0 PC 3.0

MORSETTIERE MORSETTIERE MORSETTIERE

SACE

Depth: 1200-1400-1600

PC 3.0

MORSETTIERE

PC 3.0

MORSETTIERE

PC 3.0

MORSETTIERE

SACE

Depth: 1400-1600

PC 3.0

MORSETTIERE

SACE

MORSETTIERE

PC 3.0

SACE

PC 3.0 PC 3.0

MORSETTIERE

PC 3.0

Depth: 1400-1600

PC 3.0

MORSETTIERE

SACE

MORSETTIERE

PC 3.0 PC 3.0 PC 3.0

MORSETTIERE

PC 3.0

ABB PC30 23-11-2009, 8:1414

ABB SACE 15

C1 C4

D1 D4

Typical Incoming and Bus-tie

solutions

Typical Incoming and Bus-tie solu-

tions for main busbar system from

5000 to 6300 A

Typical Incoming and Bus-tie solu-

tions for main busbar system

up to 4000 A

For customised solutions, please contact ABB SACE S.p.A. directly

Depth: 1200-1400-1600

PC 3.0 PC 3.0PC 3.0

SACE

PC 3.0

SACE

PC 3.0

SACE

PC 3.0

Depth: 1200-1400-1600

PC 3.0

SACE

MORSETTIERE MORSETTIERE MORSETTIERE MORSETTIERE MORSETTIERE MORSETTIERE

Depth: 1400-1600

PC 3.0PC 3.0

SACE

PC 3.0

SACE

PC 3.0 PC 3.0

Depth: 1400-1600

PC 3.0 PC 3.0 PC 3.0PC 3.0

SACE

MORSETTIERE MORSETTIERE MORSETTIERE MORSETTIERE MORSETTIERE MORSETTIERE

ABB PC30 23-11-2009, 8:1415

16 ABB SACE

PABC

1025 450 525 50

1200 450

400 350

525 225

1400 450

525 425

650 300

1600 450

525 625

650 500

FRONT

Switchgear depth

The switchgear can have different

depths. Selection mainly depends on

the rated current of the main busbar

system, on the short-time withstand

current and on the space needed for

feeder connections.

Depth

Standardisation

Switchgear depth in relation to the main busbars rated current

Amperes Depth

Max. 50 kA 400 1200

630 1200

800 1200

1000 1200

1250 1200

1600 1200

2000 1200

2500 1200

Max. 75 kA 400 1025-1200

630 1025-1200

800 1025-1200

1000 1025-1200

1250 1025-1200

1600 1025-1200-1400

2000 1025-1200-1400

2500 1025-1200-1400

3200 1025-1200-1400-1600

Max. 100 kA 3200 1400-1600

4000 1400-1600

5000 1400-1600

6300 1400-1600

ABB PC30 23-11-2009, 8:1416

ABB SACE 17

Available versions

The ABB MNS R switchgear is avail-

able in the following versions/types:

- For indoor installation

- Top and bottom entry power cables

- Top and bottom entry bus-duct

- Top and bottom entry auxiliary cables

- Standard painting

- Special painting cycle for aggressive

environments

- Bare busbars

- Sheathed busbars

- Busbars with protective electrolytic

treatment

- Flame-proof cables and wiring

- Flame-proof and alogen free cables

and wiring

- Arc-proof

- Degree of protection IP30…54

- IEC segregation forms 3a, 3b and 4b.

Versions

Arc-proof

On request, in order to achieve the

maximum safety level, is available a

version tested in conformity with the

technical report IEC 61641. The arc

proof ABB MNS R switchgear can

withstand the stresses caused by any

internal arcs for short-circuit

currents up to 100 kA for 300 ms at

at 415 V unaltered.

Version according to UL Standards

ABB MAX SG is the solution available

in accordance with the American

Standards UL 1558. Please refer to the

relevant technical documentation for

details.

ABB PC30 23-11-2009, 8:1417

415 V, still keeping the voltage value

18 ABB SACE

Versions

Power Motor Control Center integrated solutions

By means of a busbar transition panel, it is possible to

make Power Motor Control Centers to supply widrawable

motor control feeder units.

ABB PC30 23-11-2009, 8:1518

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ABB MNS R System Manual

ABB MNS R System Manual

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