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 distribution 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-2
AC Low-voltage
distribution 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
Height
of 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
Height
of 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
2200
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
Reactive
compensation
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
Reactive
compensation
Reactive
compensation
Reactive
compensationFeed back-upFeed back-upFeed back-upFeed back-upFeed back-up
ElectricalcomponentsinthemaincircuitElectricalcomponentsinthemaincircuit

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
MBXL
Indoor and outdoor
low-voltage power
distribution 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
1200
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
Electricalcomponentsinthemaincircuit
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
1200
Height 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
Electricalcomponentsinthemaincircuit

9
Lighting
distribution 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 ====== === ===
Protection
by
fusing
M-surface mounted
R-conceal mounted
Terminal
electrical
equipment
Design
code
J-metal enclosure
H-stainless steel
enclosure
Total number
of loop
Service conditions
a. 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 Electrical
Components

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 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. 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 ===== ===/
Fuse-
switch-
disconnector
Design
code
MB
Conventional
free air thermal
current (A)
Pole
1-single pole
none-three poles
4-four poles
Rated
operational
voltage(V)
690
500
400
Rated
operational
current(A)
All current
All current
100
>100
Utilization
category
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 data
Rated 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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Fuse-switch-
disconnector
Design code
MB
Conventional free
air thermal current (A)
Operation
T-making and
breaking of three-
phase simultaneously
D-making and
breaking of three-
phase separately
N-up outgoing
S-down outgoing
L-distance of fixing
hole center 185
Catalogue Number
MB . H 2 ==== ===
Fuse-Switch-
Disconnector
Product Description
MB.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.
Rated
operational
voltage(V)
690
500
400
Rated
operational
current(A)
All current
All current
100
>100
Utilization
category
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 data
Configuration: installation on bus bar,
three phases make and break simultaneously, up outgoing cable
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 data
Configuration: 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 data
Configuration: 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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
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
Technical data
Weight: 6168g
NH fuse-link size:
690V
400A
AC21B
3
50kA
500V
500A
AC22B
3
100kA
400V
630A
AC23B
3
100kA
MB.H2-630/TN
Technical data
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
Technical data
Weight: 6030g
NH fuse-link size:
690V
400A
AC21B
3
50kA
500V
500A
AC22B
3
100kA
400V
630A
AC23B
3
100kA
MB.H2-630/DN
Technical data
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
Monitoring
module
Inut3phases.OK
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.
Instrument
transformer
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
Amperage
module

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: fff
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 rules
1. Technical requirement
1.1 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 selection
2.1 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 Fuse
Links Selection
Guide

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