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27 views20 pagesManual NB2-80ZT
The document provides user instructions for the NB2-80ZT Miniature Circuit Breaker from Chint Electrics, detailing safety warnings, installation requirements, and technical specifications. It emphasizes the importance of proper installation by qualified personnel, the product's protection capabilities, and its communication functions via RS485 and Bluetooth. Additionally, it outlines maintenance procedures, troubleshooting tips, and warranty information for the product.
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0% found this document useful (0 votes)
27 views20 pagesManual NB2-80ZT
The document provides user instructions for the NB2-80ZT Miniature Circuit Breaker from Chint Electrics, detailing safety warnings, installation requirements, and technical specifications. It emphasizes the importance of proper installation by qualified personnel, the product's protection capabilities, and its communication functions via RS485 and Bluetooth. Additionally, it outlines maintenance procedures, troubleshooting tips, and warranty information for the product.
Uploaded by
stylo19Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
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NO:2023.06
CHNT
CHINT ELECTRICS
NB2-80ZT
Miniature Circuit Breaker
User Instruction _
Standard: |EC/EN 60898-1 A Safety Warning
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(1) It is strictly prohibited to install the product in an environment
containing flammable and explosive gases, wet condensation,
and wet hand operation.
It is forbidden to touch the conductive part of the product during
the operation of the product.
It is forbidden to test the product performance by using the
method that the live wire directly touches the grounding device,
or the live wire is directly shorted to the neutral wire.
When installing, repairing and maintaining the product, it is
necessary to ensure that the circuit is powered off.
The protection characteristics of the product shall be set by the
manufacturer, and it is not allowed to disassemble or adjust at
will.
The product must be wired and installed by qualified personnel,
and checked regularly.
Children are not allowed to play with products or packaging.
Foreign matters shall be prevented from falling into the product.
Do not install it where the gas medium can corrode metal and
damage insulation.
When the product is installed and used, the wiring screws should
be tightened, and the wires are not easy to loosen and pull out.
The wires should be selected strictly according to the
requirements and matched with the required power supply and
load. )
This product cannot protect the electric shock hazard caused by
contacting two wires of the protected circuit at the same time.
(1 Please strictly install the wiring diagram for correct wiring of
this product.
This product is not suitable for direct starting of high
inductive and capacitive loads such as fans, motors, electric
heating equipment and capacitor cabinets. @ Main purpose and scope of application
This product is applicable to the circuit with AC 50Hz, rated voltage of
230V/400V and rated current of 80A. It plays the role of overload, short
circuit, overvoltage, undervoltage and leakage protection, and can also be
used for infrequent connection and disconnection of the circuit under
normal conditions.
The product also has remote control, electrical parameter (voltage,
current, power) measurement functions, and can be networked with
external devices through RS485 communication interface or Bluetooth.
® Normal use, installation, transportation and
storage conditions
2.1 Service conditions:
- Working environment temperature: - 25 °C~+70 °C, and the average
working temperature for 24 hours shall not exceed+35 °C;
- Altitude: the altitude of the installation site shall not exceed 2000m;
- Pollution level: Level 2;
- Protection grade: IP20;
- Installation category: Class Il.
2.2 Installation conditions:
The circuit breaker shall be installed vertically without obvious
shaking, shock and vibration under the conditions of meeting safety
warnings.
2.3 Transportation and storage conditions:
the circuit breaker shall not fall or be attacked by rain or corrosive gas
during storage and transportation.
E} Main technical parameters
3.1 Main technical performance indicators
01 Table 1 Main Technical Performance Indexes
Parameters or performance
Product model
Parameter value or performance value
ZT: with RS485 communication;ZW: with
RS485 and Bluetooth communication
Compliance with standards
IEC/EN 60898-1
Rated voltage (Ue)
1P+N: AC230V; 3P+N: AC400V
Rated current (In)
6A, 10A, 16A, 20A, 25A, 32A,
40A, SOA, 63A, 80A
Number of poles
IP+N. 3P+N
Instantaneous tripping curve
ic
Rated short-circuit capacity (Icn)|
6000A
Operating short-circuit
breaking capacity (Ics)
6000A
Electrical life
6000 times
Mechanical life
10000 times
Reference temperature
305°C
Remote Closing time (tc)
<3s
control Opening time (to)
<2s
Setting value of overvoltage|
jaction (Uvo)
The default value is AC280V + 5V,
which can be set
|Overvoltagel
protection Overvoltage recovery
value (Uvor)
The default value is AC250V, which can|
be set
Minimum non driving
time of overvoltage
The default value is 3s, which can be
set in the third column of Table 2
[Automatic closing delay
time after voltage returns
ito normal (tvd)
The default value is 10s, which can be
set Parameters or performance
Under voltage action
setting value (Uvu)
Continued Table 2
Parameter value or performance value
The default value is AC165V + 5V,
which can be set
Under
voltage
protection |yalue (Uvur)
Undervoltage recovery
The default value is AC190V, which can|
be set
(can be
land
\closed)
lopened Minimum under voltage
non driving time
The default value is 3s, which can be
set
to normal (tvd)
[Automatic closing delay
time after voltage returns
The default value is 10s, which can be
set
. Voltage
Electrical
Grade 0.5
15 |parameter|electric current
Grade 0.5
Accuracy
power
Level 1.0
Note: "Can be opened or closed” means that the function can be set to be
opened or closed.
Table 2 Maximum Action Time and Minimum Non Drive Time of Overvoltage
Overvoltage action
characteristics
sUvor
Maximum action time
Minimum non driving time
Inaction
3.2 Basic error of voltage and current measurement
Table 3 Basic error limits of current under reference voltage
Direct input
Percentage error limit
current value
1AsI<0.1In
Grade 0.5 Level 1.0
0.1InsI