Low voltage-distribution-cabinet

COMPANY INTRODUCTION

Meba is a first class Asian supplier of low voltage products, including residential and industrial electrical components. with more than 1500 employees. Since its creation in 1993, the company has grown rapidly in Asia.

All products manufactured according to IEC947 etc international standard.

The export department is located in Wenzhou, China and Hongkong.

The company combines high quality customer service with a diverse product range, to meet a wide variety of electrical d ist r ibut ion and protection needs for customers world-wide.

Visit our website to learn more about new Meba products.

For more information please connct Meba.

http://www.mebamfg.com

Contents

MB-2 AC Low-voltage distribution cabinet

MB-2

MBXL

PR30 Lighting distribution box

Main Electrical Components

Fuse-switch-disconnector

MB-H1

MB-H2

Monitoring Module

Amperage Module

Instrument Transformer

Low-voltage Fuse Links Selection Guide

2

5

9

10

12

17

28

29

29

30

1

MB-2AC Low-voltagedistribution cabinet

Product Application

MB-2 series of low-voltage distribution cabi-

net is mainly on fuse protection,suitable for

low-voltage electricity distribution systems,

such as factory and mining enterprises, com-

mercial buildings, residential quarters; to be

used as lighting, power distribution equipment,

conversion and isolation.

Product Features

1 Bus bar system.

The bus bar system is composed of MB.H1 and MB.H2

series fuse-switch-disconnector, basing on bus bar and unique

adapters; to achieve compact distribution and detecting sys-

tems with various electrical components. All electrical modules

are mounted on the conductive bus bars,it saves the connec-

tion between the switch and bus bar. The system is compact

and adjusted easily overall as well.

2. Main circuit solution

For the main circuit connection and the electrical components,

please refer to the Main Circuit diagram for detail.

3. Reactive power automatic compensation

According to specific requirement and service environment,

there are new type reactive power automatic compensation

system available, to adopt intelligent mechatronics power ca-

Product Description

MB-2 series of low-voltage distribution cabinet comes from

the valuable wisdom and experience of our company engi-

neers and technical experts of domestic electrical equipment.

Its design refers to domestic and abroad advanced technology,

in line with China’s industrial technology development trend of

new cabinets. The main components in the cabinet are adopted

own patented products with high-technology in China. It has

overcome a series of drawbacks for the traditional circuit break-

ers type distribution cabinet, such as low breaking capacity, the

larger the ratio of selective coordination, non-current-limiting

characteristics and so on, Small size, high capacity, reliable

performance, simple operation, as well as high breaking

capacity, current-limiting and anti-aging; these make our prod-

ucts be considered as the recognized and cost-effective power

distribution solution to the low-voltage distribution field in China.


M B - 2

Fuse protection

Breaking capacity code

1- breaking capacity 30kA



Bus bar

mounting

Catalogue Number

Product technical data

Rated frequency 50Hz

Rated insulation voltage AC690V

Rated voltage Main circuit AC380V

Auxiliary circuit AC380 220 24V

Rated current of horizontal bus bar 2500A

Rated short-time withstand current 50kA

Material C/G section

Pollution degree 3

Ingress protection IP30

MB-2

pacitor switching composite device; therefore undercompensation

and over compensation won’t occur. It is non-inrush surge,

non-noise, steady and reliable.

2

Service and installation conditions

a. The ambient air temperature does not exceed 40℃ and no

less than -5℃.The average temperature in a period of 24h

does not exceed 30℃.

b. Indoor application and installation; the altitude of the site

of installation does not exceed 2000m above sea level.

c. The ambient air is clean and its relative humidity does not

exceed 50% at the maximum temperature of 40℃. Higher

relative humidities are permitted at lower temperatures.

d The gradient to vertical plane does not exceed 5. ℃when

installation, the all cabinets should be flat relatively.

e. The cabinets should be installed where without abnormal

vibrations or shocks and corrosion.

f. Special requirement is not included in these conditions above,

please contact us.


4

Main circuit solution

The solutions to main circuit and the main electrical components in the power distribution cabinet


Circuit diagram

Application

Term

Intelligent Circuit Breaker

Intelligent Circuit Breaker

Fuse-switch disconnector







Contactor

Contactor

Thermal relay

Thermal relay

Instrument transformer

Heightof cabinet(mm)

Catalogur number

MBW45-4000

MBW45-2000

MB.H2-630/DS*2

MB.H1-630

MB.H1-250

MB.H1-160

MB.H1-400

MB.H2-630

MB.H2-160

CJX2-95

CJX2-63

JR36-100

JR36-63

BH-0.66 /5

Width of cabinet(mm)

Depth of cabinet(mm)2200

01 02 03 04 05 06 07 08

Collector back-up

A

1

4

800

750

B

1

4

800

600

C

1

4

800

600

Collector back-up

A

1

4

800

750

B

1

4

800

600

C

1

4

800

600

Collector back-up

A

1

4

800

750

B

1

4

800

600

C

1

4

800

600

Collector back-up

A

1

4

800

750

B

1

4

800

600

C

1

4

800

600

Collector back-up

A

5

5

5

5

800

600

B

5

5

5

5

800

600

C

5

5

5

5

800

600

Collector back-up

A

4

8

4

800

600

B

4

8

4

800

600

C

4

8

4

800

600

Collector back-up

A

2

6

800

600

B

2

6

800

600

C

2

6

800

600

Collector back-up

A

1

4

4

800

600

B

1

4

4

800

600

C

800

600

09

Collector back-up

A

1

3

3

6

4

800

600

B

1

1

5

6

4

800

600

C

Remark:

Convenient for various cable incoming connecting when actual projects, there are several manners of cable incoming connecting from upside and underside, as

well as from left, middle and right side of the cabinet.


Circuit diagram

Application

Term






Compensation controller



Fuse base

Capacitor composite switch

Capacitor composite switch

Power capacitor

Power capacitor


Arresters

Heightof cabinet(mm)

Catalogur number

MB.H1-630

MB.H1-250

MB.H2-630

MB.H2-400

MB.H2-160

RPCF-P-16.S

RPCF-P-12.S

RPCF-P-10.S

RT18L-63

HXFK-250-45A

HXFK-500-45A

BSMJ0.4-20-3

BSMJ0.23 3- -3

LMZ1-0.5 /3

FYS-0.22



11 12 13 14 15 16 31 32

B

5

5

800

600

C

5

5

800

600

A

6

6

800

600

B

6

6

800

600

C

6

6

800

600

A

4

4

600

600

B

4

4

600

600

C

4

4

600

600

Collector back-up

A

1

6

3

800

600

B

1

6

3

600

600

C

1

6

3

800

600

A

1

1

6

3

800

600

B

1

1

6

3

800

600

C

1

1

6

3

800

600

A

2

12

3

800

600

B

2

12

3

800

600

C

2

12

3

800

600

Reactivecompensation

A

1

1

10

3

7

7

3

3

3

1000

600

B

1

1

8

2

6

6

2

3

3

800

600

C

1

1

6

3

3

3

3

3

3

800

600

A

1

10

10

10

3

3

1000

600

B

1

8

8

8

3

3

800

600

C

1

6

6

6

3

3

800

600

33

A

1

1

10

1

9

9

1

3

3

1000

600

B

1

1

8

4

4

4

4

3

3

800

600

C

1

1

6

5

1

1

5

3

3

800

600

34

A

1

10

10

10

3

3

1000

600

B

1

8

8

8

3

3

800

600

C

1

6

6

6

3

3

800

600

A

5

5

800

600

K K




ReactivecompensationFeed back-upFeed back-upFeed back-upFeed back-upFeed back-up

Ele

ctric

al c

om

po

ne

nts

in t

he

ma

in c

ircu

itE

lect

rica

l co

mp

on

en

ts in

th

e m

ain

circ

uit

5


Rated frequency 50Hz

Rated insulation voltage AC690V

Rated voltage Main circuit AC380V

Auxiliary circuit AC380 220 24V

Rated current of horizontal bus bar 630A

Rated short-time withstand current 10kA

Material DMC

Pollution degree 3

Ingress protection IP30

MBXL

MBXLIndoor and outdoorlow-voltage powerdistribution box

Product Features

1. Structure features

a. Modular design of electrical components can be mounted

easily and directly on the busbar system.

b. The monitoring window for electrical components can be

moveable, in order to watch easily.

c. Shape and color of the electrical components are designed

for the humanities; it is the perfect combination of practicability,

functionlity and aesthetics.

d. Electrical components have high performance on anti-aging.

All the safety performance and physical properties are fully

consistent after replacing by new fuselinks. The overall distri-

bution box without exposed metal parts with all touching

protection. The surface level of protection is IP20 when open-

ing the door.

2. Protection features

a.Through the current limiting, it can avoid electric shocks

caused by short circuit current up to 80kA, protect circuit from

destruction caused by short circuit and overload current(with

current limiting)

b.Selective coordination between upstream and downstream

up to 80kA short circuit current

c. Cut off the loads safely, replacement of fuse body to ensure

the same security features in case of frequent short circuit faults

occur

d. Protection of personnel and animals from electrical shock

MBXL Indoor and outdoor low-voltage power distribution box

Product Application

MBXL series of low-voltage power distribu-

tion box is mainly on fuse protection, suitable

for low-voltage electricity distribution systems,

such as factory and mining enterprises, com-

mercial buildings, residential quarters; to be

used as lighting, power distribution equipment,

conversion and isolation.

Catalogue Number

MB X L

Box

Power

MB

Product Description

MBXL low-voltage power distribution box is our own products

by R&D referrence to domestic and foreign cabinets, using

environmentally-friendly materials from DMC, with high strength

anti-aging, not rust, ground-free, anti- electrical shock, etc.It is

the best alternative to the traditional metal distribution box. The

distributor box adopts MB.H1 series and MB.H2 series

fuse-switch-disconnector (patented product) as the main pro-

tective electrical components, with small size, reliable

performance, simple operation, high safety and so on. The

application of fuse switch disconnector not only greatly en-

hance the low-voltage distribution network security features,

but also reduce the volume of the existing distribution box for

about 1/3 smaller at least. Compact size, high expansion

flexibility, modular design, it can be assembled at the scene.

6


Power distribution box with measurement meter

Product and applied

Signal output for fuse blow and lack of phase

Cable branch Box Street lights control distribution box

7

Top

cover

Top

panel

Right

panel

Back

panel

Front

panel

Left

panel

Base

panel

MBXL frame diagram

Outline and installation dimensions

Service and installation conditions

a. The ambient air temperature does not exceed 40 ℃ and no less than -5℃. The average temperature

in a period of 24 h does not exceed 30.

b. Indoor application and installation; the altitude of the site of installation does not exceed 2000 m

above sea level.

c. The ambient air is clean and its relative humidity does not exceed 50 % at the maximum temperature

of 40℃. Higher relative humidities are permitted at lower temperatures,e.g. 90% at +20. Should

take measure when there is condensation on the products which due to the changed temperature.

d. The gradient to vertical plane does not exceed 5 when installation.

e. The cabinets should be installed where without abnormal vibrations or shocks and corrosion.

f. Special requirement is not included in these conditions above, please contact us.


8

MBXL Main circuit solution



Circuit diagram

Application

Term






Contactor

Contactor

Contactor

Active watt-hour meter

Amperage module

Amperage module

Monitoring module

Monitoring module

Height of cabinet

(mm)

Catalog number

MB.H2-630

MB.H2-400

MB.H2-160

MB.H1-160

LMZ-0.5/5

CJX9-100

CJX9-75

CJX9-50

DSS345

MBBK-630

MBBK-160

MBBK-630

MBBK-160



20 21 22 23 24

Collector (feed) back-up

A

1

4

4

4

750

320

B

1

4

4

4

750

320

C

1

4

4

750

320


A B

1

5

5

5

750

320

C

1

5

1

5

750

320


A

1

3

3

3

750

320

B

1

1

2

3

3

750

320

C

1

3

1

3

750

320


A

6

6

6

750

320

B

2

4

6

2

4

750

320

C


A B

5

5

5

750

320

C

2

3

5

2

3

750

320

Ele

ctr

ical com

ponents

in t

he m

ain

circuit


Circuit diagram

Application

Term






Contactor

Contactor

Contactor

Active watt-hour meter

Amperage module

Amperage module

Monitoring module

Monitoring module

Monitoring module

Catalog number

MB.H2-630

MB.H2-400

MB.H2-160

MB.H1-160

LMZ-0.5/5

CJX9-100

CJX9-75

CJX9-50

DSS345

MBBK-630

MBBK-160

MBRK-630

MBRK-160

MBRK-3/7

1200Height of cabinet

(mm)


Depth of cabinet(mm)

25 26 27 28 29


A

4

4

4

750

320

B

2

2

4

2

2

750

320

C

4

4

4

750

320


A

1

3

3

3

1

750

320

B

1

3

3

3

1

750

320

C

1

3

3

3

1

750

320


A

1

4

3

1

1

750

320

B

1

4

3

1

1

750

320

C

5

Collector back-up

A

5

5

800

600

B

5

5

800

600

C

5

5

800

600

Collector back-up

A

4

8

800

600

B

4

8

800

600

C

4

8

800

600

Ele

ctrica

l co

mponents

in t

he m

ain

circu

it

9

Lightingdistribution box

PR30

Product Description

PR30 lighting distribution box is applicable to civilian and non-

professionals. It includes the control equipment, signal devices

and over current protection component for outgoing. It is rated

at AC 50HZ and up to 300V/63A. In the normal condition, the

non-professionals are allowed to operate the equipment, such

as switch operating and fuselink replacement.

The distribution box is composed of the plastic front cover and

metal enclosure. They are surface-mounted version and con-

ceal-mounted for option.

P R 30 ====== === ===

Protectionbyfusing

M-surface mountedR-conceal mounted

Terminalelectricalequipment

Designcode

J-metal enclosureH-stainless steel enclosure

Total numberof loop

Service conditionsa. Ambient air temperature: -5℃ +60℃ and its average over

a period of 24h does not exceed 35℃.

b. Altitude: the altitude of the site of installation does not

exceed 2000 m above sea level.

c. The ambient air is clean and its relative humidity does not

exceed 50 % at the maximum temperature of 40. Higher

relative humidities are permitted at lower temperatures,e.g.

90% at +20℃.

d. Pollution degree: 2

e. Overvoltage category:

Outline and installation dimensions

Note surface and conceal mounted

with the same A, B, H

Total number

of circuit loop

PR30

4

6

10

12

15

18

20

24

30

36

45

A

165

230

300

300

300

300

500

500

500

500

390

B

175

200

300

335

390

445

300

338

390

445

630

C

135

205

275

475

275

275

475

475

475

475

365

D

155

175

275

310

365

420

275

320

365

420

605

H

80

90

90

90

90

90

90

90

90

90

90

Total number

of circuit loop

Single row

Dual row

Triple row

PR30 Lighting distribution box

Product Application

It is suitable for advanced residential buildings,

hotels and office buildings, with fashion

design.

Catalogue Number

10

Advantage

The product development and research

to fuse and fusegear have been focused

at all times worldwide, using its signifi-

cant protection features to develop more

reasonable product structure. MB. H

series are the newest products develop-

ing from various combinations of

products, it combines fusing protection,

isolation and switching in order to make

the distribution unit smaller, more rea-

sonable and attractive.

Safety

Except for conductive parts, all are the

finger-touch protection

Environment-friendly

The products are made of environment-

friendly material.

4. Discrimination

Discrimination means when there is overload or short

circuit faults happen, the nearest protective compo-

nent upstream opens, to ensure power supply contin-

ued to non-fault circuit and cut-off safely to fault circuit.

The fuse rating ratio between upstream and down-

stream is 1.6 :1 in accordance with international

standards. Low ratio can not only reduce the current

level of protection in more details for the entire network,

but also reduce the overall harm significantly caused

by fault current on power supply network. For circuit

breaker, the ratio between upstream and downstream

is 3.4 : 1 in accordance with the standards in order to

ensure better security features. This will expand the

current level for the whole network, thereby increasing

the current level of the cables and electrical

components, which must cause a great deal of waste

for utility department and end users. Through the

application of fuse-switch-disconnector. It will reduce

the ratings of the switches, cables and electrical

components, save the cost of investment and lower

the operating power consumption.

Electrical feature

1. Rating range

Fuse-switch-disconnector differs from other switch equipment,

along with short-circuit, overload protection, isolation and switch-

ing functions. It is the newest fusegear equipment in the world

combining with tradtional fuse, disconnector and switch. It

operates not only under load but also with perfect current-

limiting and selective coordination. It can be used in low voltage

distribution circuits widely, from low voltage side of transformer

round to the input circuit to end user, current rating range from

160A~1250A for the distribution rooms or cable distribution

boxes. It is designed to be simple, easy to install and safe,

reliable to operate. It will help numbers of distribution sector

users and the construction developer reaping much more

significant economic benefits than circuit breakers solution.

2. Breaking capacity

Breaking capacity of the fuse-switch-disconnector is from 50kA

to 120kA, which fully advances against the highest possible

short-circuit condition in the realities of industrial power. The

same breaking capacity for circuit breakers is not only expen-

sive but also bulky size, therefore, the cost should be much

higher and more difficult for control and maintenance.

3. Operating under rated load

Fuse-switch-disconnector is different from our other combina-

tion of fuse products, such as insulation-disconnector or fuse

holder, which are defined in the products standards definitely

and can not be operated under the loads. Fuse-switch-

disconnector is therefore not only isolated, but also has the

switching function to break loads normally.


Main ElectricalComponents

11

Efficiency economy

1. To utility

To developers and construction sector, in low-voltage

distribution system, the cost is much lower than circuit

breaker system when overall adoption of fuse-switch-

disconnector.

2. To designer

Fuse is fully matched to transformer and cable charac-

teristic curve, the fuse selection for designers is more

convenient.

3. To user

The product configuration is easy and flexible for

connection and installation. Ingress protection can be

reached IP20.

5. Current-limiting characteristic

Any other circuit protection devices can not be compared with

the current limiting characteristics of the fuse. Relying on their

own physical characteristics, Joule-integral I2t setting, these

achieve to cut off the fault current before the prospective peak

current run up to avoid the circuit system from harm. Normal

circuit breakers are non-current limiting characteristics; the

quality of their products, the aging extent of their structure will

impact their current limiting characteristics greatly.

6. Excellent over current protection characteristic

The characteristic curve of fuse is perfectly matched to the

characteristics of transformers and cables, to ensure the trans-

former to run safely when working under the maximum load;

especially for using dedicated transformer protection fuse, it

will enable the transformer running for 10 hours under load by

1.2 times or 2 hours by 1.5 times of load safely. This is very high

security and economic value if significant fluctuations in elec-

tricity load.


7. Anti-aging feature

Fuses are not the renewable parts, the products per-

formance can be fully restored to the design require-

ments by replacing fuses.

Łlthough circuit breakers can be switched repeat-

edly with convenience of users, at the same time, it

definitely have been a lot of security risks, the contact

wear, the sensitivity and the rated setting will inevita-

bly be affected.

8. Telemetry

Fuse-switch-disconnector can be realized in the re-

mote monitoring function in the low-voltage distribu-

tion network. In use of fuse-switch-disconnector is not

only compliant to the international norms, but also

great to meet the running norms of electrical appli-

ances in our country.

12

MB.H1

Product Application

MB.H1(DR1) series of fuse-switch-

disconnector are mainly used in circuits with

high short-circuit current and motor circuit as

power switch, disconnecting switch, emer-

gency switch and circuit protection. It is not

suitable to switch a single motor directly.

Product Description

MB.H1 series of fuse-switch-disconnector is the newest de-

veloping from various products combination of products, it

combines fusing protection, isolation and switching in order to

make the distribution unit smaller, more reasonable and

attractive.

For MB.H1 series of fuse-switch-disconnector, the rated

insulation voltage is up to AC 50Hz 800V, the rated working

voltage up to 690V and the rated working current up to 630A.

Product Featuresa. The switch with half sealed structures is made up of two

parts: the seat and cover (the fuse holder).Through the window

in the cover, it can observe the rated data of the fuse links and

indicator status. The switch should be matched with the appro-

priate size of fuse links accordingly. MB.H1-160/1 is single-

pole and MB.H1-160 is three-pole, both can be matched with

size 000 and 00 fuselinks. MB.H1-250/1, MB.H1-400/1, MB.

H1- 400, MB.630/1 are single-pole and MB.H1-250, MB.H1-

H1- 1, 2, 3630 are three-pole. They are matched with size

fuselinks separately. The three-pole switch can be combined

with the single-pole version with the same size into four-pole

switch.

b. The switch has the features of small size, reliable operation,

convenient installation and removal.

c. All of these products, except for conductive parts, all are the

finger-touch protection: IP20.Compliance with GB14048.3 and

IEC/EN60947-3.

Catalogue Number

MB . H 1 ===== ===/


Designcode

MB

Conventionalfree air thermalcurrent (A)

Pole1-single pole

none-three poles4-four poles

Ratedoperationalvoltage(V)

690

500

400

Ratedoperationalcurrent(A)

All current

All current

100

>100

Utilizationcategory

AC21B

AC22B

AC23B

AC23B

Rated making and breaking Capacity

Making

I/Ie

1.5

3

10

10

U/Ue

1.05

1.05

1.05

1.05

COSφ

0.95

0.65

0.45

0.35

Breaking

Ic/Ie

1.5

3

8

8

Ur/Ue

1.05

1.05

1.05

1.05

COSφ

0.95

0.65

0.45

0.35

Nore I making current

Ie rated operational current

Ic breaking current

U making voltage

Ue rated operational voltage

Ur recovery voltage

Rated making and breaking Capacitys

MB.H1 Fuse-Switch-Disconnector

Fuse-Switch-Disconnector

13

MB.H1-160=Fuse-Switch-Disconnector

Technical dataRated insulation voltage: 800V

Rated operational voltage: 400, 500, 690V

Conventional free air thermal current with fuse-links: 160A

NH fuse-link size: 00,000

Weight: 990g

The ratings on various operational voltage and utilization category

Rated operational voltage:

Rated operational current:

Utilization category:

NH fuse-link size:

Breaking capacity of fuselink:

MB.H1-160/4

690V

100A

AC21B

00,000

50kA

500V

125A

AC22B

00

100kA

230/400V

160A

AC23B

00

100kA


Rated operational voltage: 400,500,690V



Weight: 700g





NH fuse-link size:


MB.H1-160

690V

100A

AC21B

00,000

50kA

500V

125A

AC22B

00

100kA

230/400V

160A

AC23B

00

100kA





Weight: 290g





NH fuse-link size:


MB.H1-160/1

690V

100A

AC21B

00,000

50kA

500V

125A

AC22B

00

100kA

230/400V

160A

AC23B

00

100kA

14





NH fuse-link size: 1

Weight: 735g





NH fuse-link size:


MB.H1-250/1

690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

230/400V

250A

AC23B

1

100kA





Weight: 1510g





NH fuse-link size:


MB.H1-250

690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

230/400V

250A

AC23B

1

100kA





Weight: 2245g





NH fuse-link size:


MB.H1-250/4

690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

230/400V

250A

AC23B

1

100kA

15

MB.H1-400 =Fuse-Switch-Disconnector





Weight: 1302g





NH fuse-link size:


MB.H1-400/1

690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

230/400V

400A

AC23B

2

100kA





Weight: 3272g





NH fuse-link size:


MB.H1-400

690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

230/400V

400A

AC23B

2

100kA





Weight: 4574g





NH fuse-link size:


MB.H1-400/4

690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

230/400V

400A

AC23B

2

100kA

16

MB.H1-630 Fuse-Switch-Disconnector





Weight: 1492g





NH fuse-link size:


MB.H1-630/1

690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

230/400V

630A

AC23B

3

100kA





Weight: 3855g





NH fuse-link size:


MB.H1-630

690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

230/400V

630A

AC23B

3

100kA





Weight: 5347g





NH fuse-link size:


MB.H1-630/4

690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

230/400V

630A

AC23B

3

100kA

17

MB.H2

Product Application

MB.H2 series of fuse-switch-disconnector

are mainly used in circuits with high short-

circuit current and motor circuit as power

switch, disconnecting switch, emergency

switch and circuit protection. It is not suitable

to switch a single motor directly.

Product Features a. The switch with half sealed structures is made up of two

parts: the seat and cover (the fuse holder).Through the window

in the cover, it can observe the rated data of the fuse links and

indicator status.

b. Installation: The switch is molded designed. MB.H2-160

(50mm in width),can be directly installed on 100mm busbar

through the incoming feeder. There are two type connecting

version available: up outgoing and down outgoing, three phases

make and break simultaneously, suitable for NH000 and NH00

size fuses. MB.H2-250 (102mm in width),can be directly

installed on 185mm busbar through the incoming feeder, it also

can be installed on the supporter by two 12x18 installation

holes. There are two type connecting version available: up

outgoing and down outgoing, three phases make and break

simultaneously or separately, suitable for NH1 size fuses.

MB.H2-400 (102mm in width),can be directly installed on

185mm busbar through the incoming feeder, it also can be

installed on the supporter by two 12x18 installation holes.

There are two type version available: up outgoing and down

outgoing, three phases make and break simultaneously or

separately, suitable for NH1 size fuses. MB.H2-630 (102mm

in width),can be directly installed on 185mm busbar through

the input line, it also can be installed on the supporter by two

12x18 installation holes. There are two type connecting version

available: up outgoing and down outgoing, three phases make

and break simultaneously or separately, suitable for NH3 size

fuses. MB.H2-160/L (52mm in width),can be directly installed

on 185mm busbar through the input line. There are two type

connecting version available: up outgoing and down outgoing,

three phases make and break simultaneously or separately,

suitable for NH000 and NH00 size fuses.

c.The switch has the features of small size, reliable operation,

convenient installation and removal.

d.All of these products, except for conductive parts, all are the

finger-touch protection: IP20. Compliance with GB14048.3 and

IEC/EN60947-3.

MB.H2 Fuse-Switch-Disconnector


Design code

MB

Conventional freeair thermal current (A)

OperationT-making and

breaking of three-

phase simultaneously

D-making and

breaking of three-

phase separately

N-up outgoingS-down outgoing

L-distance of fixinghole center 185

Catalogue Number

MB . H 2 ==== ===

Fuse-Switch-Disconnector

Product DescriptionMB.H2 series of fuse-switch-disconnector is the

newest developing from various products combina-

tion of products, it combines fusing protection, isola-

tion and switching in order to make the distribution unit

smaller, more reasonable and attractive. For MB.H2

series of fuse-switch-disconnector, the rated insula-

tion voltage is up to AC 50Hz 1000V, the rated working

voltage up to 690V and the rated working current up to

630A.

Ratedoperationalvoltage(V)

690

500

400

Ratedoperationalcurrent(A)

All current

All current

100

>100

Utilizationcategory

AC21B

AC22B

AC23B

AC23B

Rated making and breaking Capacity

Making

I/Ie

1.5

3

10

10

U/Ue

1.05

1.05

1.05

1.05

COSφ

0.95

0.65

0.45

0.35

Breaking

Ic/Ie

1.5

3

8

8

Ur/Ue

1.05

1.05

1.05

1.05

COSφ

0.95

0.65

0.45

0.35

Note I making current

Ie rated operational current

Ic breaking current

U making voltage

Ue rated operational voltage

Ur recovery voltage

Rated making and breaking Capacitys

18


Technical dataConfiguration: installation on bus bar,

three phases make and break simultaneously, up outgoing cable

Rated insulation voltage: 1000V



NH fuse-link size: 00, 000

Weight: 1166g





NH fuse-link size:


690V

80A

AC21B

000

50kA

100A

00

500V

100A

AC22B

000

100kA

125A

00

400V

100A

AC23B

000

100kA

160A

00

MB.H2-160/TN

Technical dataConfiguration: installation on bus bar,

three phases make and break simultaneously, down outgoing cable





Weight: 1166g





NH fuse-link size:


690V

80A

AC21B

000

50kA

100A

00

500V

100A

AC22B

000

100kA

125A

00

400V

100A

AC23B

000

100kA

160A

00

MB.H2-160/TS

19


Technical dataConfiguration: installation on bus bar and supporter,

three phases make and break separately, up outgoing cable





Weight: 1543g





NH fuse-link size:


690V

80A

AC21B

000

50kA

100A

00

500V

100A

AC22B

000

100kA

125A

00

400V

100A

AC23B

000

100kA

160A

00

MB.H2-160/DNL


three phases make and break separately, down outgoing cable





Weight: 1543g





NH fuse-link size:


690V

80A

AC21B

000

50kA

100A

00

500V

100A

AC22B

000

100kA

125A

00

400V

100A

AC23B

000

100kA

160A

00

MB.H2-160/DSL

MB

MB

MB

MB

20








Weight: 1674g





NH fuse-link size:


MB.H2-160/TNL

690V

80A

AC21B

000

50kA

100A

00

500V

100A

AC22B

000

100kA

125A

00

400V

100A

AC23B

000

100kA

160A

00







Weight: 1674g





NH fuse-link size:


MB.H2-160/TSL

690V

80A

AC21B

000

50kA

100A

00

500V

100A

AC22B

000

100kA

125A

00

400V

100A

AC23B

000

100kA

160A

00

21








Weight: 5678g





NH fuse-link size:


690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

400V

250A

AC23B

1

100kA

MB.H2-250/TN







Weight: 5678g





NH fuse-link size:


690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

400V

250A

AC23B

1

100kA

MB.H2-250/TS

22







Weight: 5540g





NH fuse-link size:



690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

400V

250A

AC23B

1

100kA

MB.H2-250/DN







Weight: 5540g





NH fuse-link size:


690V

160A

AC21B

1

50kA

500V

200A

AC22B

1

100kA

400V

250A

AC23B

1

100kA

MB.H2-250/DS

23







Weight: 5678g





NH fuse-link size:



690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

400V

400A

AC23B

2

100kA

MB.H2-400/TN







Weight: 5678g





NH fuse-link size:


690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

400V

400A

AC23B

2

100kA

MB.H2-400/TS

24







Weight: 5540g





NH fuse-link size:



690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

400V

400A

AC23B

2

100kA

MB.H2-400/DN







Weight: 5540g





NH fuse-link size:


690V

250A

AC21B

2

50kA

500V

315A

AC22B

2

100kA

400V

400A

AC23B

2

100kA

MB.H2-400/DS

25







Weight: 6168g





NH fuse-link size:


MB.H2-630 = Fuse-Switch-Disconnector

690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

400V

630A

AC23B

3

100kA

MB.H2-630/TN







Weight: 6168g





NH fuse-link size:


690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

400V

630A

AC23B

3

100kA

MB.H2-630/TS

26







Weight: 6030g





NH fuse-link size:


MB.H2-630 = Fuse-Switch-Disconnector

690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

400V

630A

AC23B

3

100kA

MB.H2-630/DN







Weight: 6030g





NH fuse-link size:


690V

400A

AC21B

3

50kA

500V

500A

AC22B

3

100kA

400V

630A

AC23B

3

100kA

MB.H2-630/DS

27

Mounting

MB.H1

MB.H2

Transverse bar fixing mounting1

Transverse bar fixing mounting2

Switch Mounting

Switch Mounting

Pothook mounting Hole mounting

28

Product Description

In order to provide better protection to electri-

cal equipment and to meet the requirements

of fuse-switch-disconnector in the special

occasions, to find out the failures caused by

electrical equipment and transmission circuit

fault ; our company developped this fuse moni-

toring module. Visual display of not only each

fuse status in the fuse-switch-disconnector

and open-close status of the switch, but also

to monitor phase-lacking at power supply. If

there is failure, the monitoring module

switches a passive signal for remote alarm or

other control circuit to cut off the load.

Monitoring Module


Number

MBRK-3/630

MBRK-3/160

MBRK-1/T

MBRK-3/T

Three-phase

AC

Three-phase

AC

Single-phase

AC

Three-phase

AC

Range

380V

380V

220-380V

380V

Usage

MB.H2-630 fuse-

switch-disconnector

MB.H2-160 fuse-

switch-disconnector

All single phase

AC fuses

All three phase

AC fuses equipments

Monitoring module

State

Fuse state

1. Switch on

Fuse. OK

Fuse. OK

Fuse. OK

Fuse. blown

Fuse. blown

Fuse. blown

Fuse. blown

Fuse. blown

Fuse. blown

Fuse. blown

MBRK-

Input

phase status

3 input phases. OK

1 input phase. lacking

2~3 input phases. lacking

Display status

Phase A. blown

Phase B. blown

Phase C. blown

Phase A,B. blown

Phase B,C. blown

Phase C,A. blown

Phase A,B,C. blown

Green led

Electronic

Display

Yellow led

System fault

Display

Red led

F1

Display

F2

Display

F3

Display

NO contact13,14

Off On

NO contact11,12

Off On

2. Switch Off

Fuse. OK

Fuse. OK

Fuse. OK

Fuse. blown

Fuse. blown

Fuse. blown

3 input phases. OK



3 input phases. OK



Monitoringmodule

Inut

3 p

hase

s. O

K

Category

29

Product Description

To facilitate the visual display of the current

value of each loop for fuse-switch-

disconnector (rail),we develop the ammeter

module. It is easy for installation, wire

connecting.

Amperage Module, Instrument Transformer

Number

MBBK-1/630

MBBK-1/160

MBBK-3/630

MBBK-3/160

Category

Single

phase

Single

phase

Three

phase

Three

phase

Range

200-600A

50-200A

200-600A

50-200A

Usage

MB.H2-630 fuse-

switch-disconnector

MB.H2-160 fuse-

switch-disconnector

MB.H2-630 fuse-

switch-disconnector

MB.H2-160 fuse-

switch-disconnector

Amperage module


Product Description

In order to measure the current value of each

loop for fuse-switch-disconnector (rail),we

design the current transformer for the fuse-

switch-disconnector particularly. The CT is

directly mounted between the fuse-switch

and busbar easily.

Instrumenttransformer


Number

LMZ-0.5/630

LMZ-0.5/160

Range

200-600/5A

50-200/5A

Usage

MB.H2-630 fuse-switch-

disconnector

MB.H2-160 fuse-switch-

disconnector


Amperagemodule

30

Low-voltage Fuse Links Selection Guide

The purpose of using fuses is to cut off

the line safely and correctly to protect

discrete components for the whole line

in case of circuit faults.

Compliance to standard

GB 13539.1~7 Low voltage fuses and series standards.

IEC 60269-1~4 Low voltage fuses and series

standards.

The features of fuse

1. High breaking capacity

The breaking capacity for fuses is rated 120kA/500Vac, which

is the highest in all of the low-voltage equipments at present.

And there is no noise and light effect when breaking.

2. Excellent current limiting

A very strong current-limiting effect when fuse breaking short-

circuit current, will enable to prevent the electrical equipment

from the destructive damage generated by a great short-circuit

current.

3. Small selective ratio for upstream to downstream

The selective ratio for fuses coordination between upstream

and downstream is 1.6:1 (for circuit breakers, the ratio is 3:1 or

4:1).It makes the protective classification for the electrical

network more rigorous, reliable and cost efficient.

4. Good performance in anti-aging and keeping line stable.

5. Small size, cheap cost and easy maintenance

Compared with the other electrical components of circuit

protection, with the same current rating products, fuses are

smaller in size, cheaper in cost and easier in operation and

maintenance.

Normal service and installation conditions

a. Ambient air temperature: -5℃~+60℃.

b. Altitude: less than 2000 m.

c. The ambient air: The air is clean and its relative humidity does

not exceed 50 % at the maximum temperature of 40.

d. Higher relative humidities are permitted at lower temperatures,

e.g. 90% at +20. Should take measure when there is conden-

sation on the products which due to the changed temperature.

e. Pollution degree: 3

f. Overvoltage category: f f f

Noun and items

“gG” full range protection and for general purpose

fuselink;

“aM” partial range protection and for motor circuit fuselink;

“aR” partial range protection and for semi-conductor

fuselink.

Fuse selection rules1. Technical requirement1.1 rated voltage

the rated voltage of the fuselink must be higher than

the voltage placed

1.2 breaking capacity

the breaking capacity of the fuselink must be higher

than the prospective maximum short circuit current.

2. Fuse selection2.1 conductive wire and cable protection

According to working current of wire and cable to

select fuse rating.

a. over load protection to wire and cable

the rated current of fuse link should be equal or less

than the working current of wire and cable

b. short circuit protection to wire and cable

the sectional area of wire and cable is determined,

then the rated current of the matched fuse link should

be higher by 1~2 rating.

2.2 motor protection

The fuse is selected according to the service

entironment of the fuse and the service condition of

the motor. Fuse rated current selection is about the

motor rated current of 1.3 ~1.6 times.

Overload protection to motor must also have overload

protection component or overload protection device.

2.3 capacitor protection

The fuse in capacitor device is usually used for short

circuit protection, fuse rated current selection can’t be

less than the capacitor rated current of 1.6 times.

2.4 semiconductor equipment protection

The melting It of fuselink should be less than the It of

the semiconductor device or component.

NH fuse

000

00

0

1

2

3

Rated

voltage (V)

500 690

500 690

500 690

500 690

500 690

500 690

Rated

current (A)

4, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 63, 80, 100

4, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160

4, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160

16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 200, 250

80, 100, 125, 160, 200, 250, 315, 355, 400

160, 200, 250, 315, 355, 400, 500, 630

Rated breaking

capacity

500V/120kA

690V/50kA

500V/120kA

690V/50kA

Basic data of fuselinks

Low-voltage FuseLinks SelectionGuide

31

Date post:	06-Aug-2015
Category:	Engineering
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