CHINT NB1-63H/2 Installation instructions

NO:2020.07
Standard: IEC/EN 60947-2
NB1-63H/2
Moulded Case Circuit Breaker
User Instruction

Installation in any damp, condensed-phase environment with
inflammable and explosive gas is forbidden. It is strictly prohibited
to operate the product with wet hands.
You are prohibited from touching the conductive part when the
product is operating.
It is strictly prohibited to test the performance of the product by
the direct contact of the hot wire against the grounding device or
the direct short circuit of the hot wire and the neutral wire.
When the product is being installed or maintained, the power
must be switched off.
The protection features of the product are set by the manufacturer.
It is not allowed to open or adjust the circuit breaker at will.
The product must be wired and installed by qualified personnel
and be checked regularly.
It is prohibited to let children play with the product or the package.
Prevent foreign objects from falling into the product.
Do not install the product at places where gas media can cause
metal corrosion and insulation damage.
Tighten the wiring screws when installing the product to prevent
wires from loose or being pulled out. Select wires strictly according
to instructions and connect them to proper power supply and
load.
This product does not provide protection for electric shock and
electricity unbalance.
1
2
3
4
5
6
7
8
Safety Warning
9
10
11

01
Purpose of Use
1
Key Technical Parameters
2
The NB1-63H/2 moulded case circuit breakers are applicable to circuits
with frequency of AC 50/60 Hz, rated voltage up to 230/400 V and rated
current up to 63 A. They provide overload and short circuit protection, and
can also be used for infrequent switching of the circuit under normal
circumstances.
Table 1 Key Technical Parameters
Rated Working voltage (Ue)
Rated limit short-circuit
breaking capacity (Icu)
1P and 1P+N：AC230V
2P，3P+N,3P and 4P：AC400V
10 kA
No. Parameter or performance Parameter value or performance value
1
2
Altitude
Pollution level
Protection level
≤ 2,000m
Level 2
IP20
3
4
5

02
Installation
3
1. Outline and installation dimensions
2. On-off indication
Red Green
I•ON O•O FF
78
-1.20
0
86
-1.40
0
49.5±0.31
45±0.31
1P
1P+N、2P
3P
3P+N、4P
18
-0.43
0
36
-0.62
0
54
-1.20
0
72
-1.20
0
Unit:mm

03
7.5
35
27
TH35-7.5 type mounting rail
3. Installation
4

04
Rated current (In)
(A)
Copper wire cross-sectional
2
area (mm )
1-6
10
16, 20
25
32
40, 50
63
1
1.5
2.5
4
6
10
16
4. Disassembly
5. Wiring: copper wires only
Table 2 Copper wire cross-sectional area
②
①

05
2.0N·m
Wiring torque
6. Operation Instruction
It is recommended to carry out the closing operation from the middle of
the handle.
I•ON I•O N
S
25 mm2
L
14 mm
S
16 mm 2
S
25 mm2
L
15 mm
S
16 mm 2
1
2

06
Maintenance
4
1.Check the circuit breaker on a regular basis during operation;
2.After the circuit breaker cuts off the overload or short-circuit current,
the fault should be eliminated before closing the circuit breaker.
Troubleshooting method
Symptoms
Cause analysis
Table 3 Analysis and troubleshooting of common faults
5
Environmental Protection
In order to protect the environment, the product or product parts
should be disposed of according to the industrial waste treatment process,
or be sent to the recycling station for assortment, dismantling and recycling
according to local regulations.
Cannot close
the circuit
breaker by
handle.
Short circuit at load end
Fault occurs to the operating
mechanism.
The rated current of the
circuit breaker does not
match the load current
Eliminate the fault
Replace the product
Replace with product of proper
specifications
Temperature
is too high.
The wire is loose or not
properly fixed by wiring
screws.
The cross-sectional area of
the selected wire is too small
Tighten the wiring screws
Replace with wire of proper
specifications
No power
The wire strip length is too
short.
The wire is loose or not
properly fixed by wiring
screws.
Re-strip the wire
Tighten the wiring screws

QC PASS
Test date: Please see The packing
ZHEJIANG CHINT ELECTRICS CO.,LTD.
NB1-63H/2
Moulded Case Circuit Breaker
IEC/EN 60947-2
Check 12

NB1-63H/2
Moulded Case Circuit Breaker
User Instruction
Zhejiang Chint Electrics Co., Ltd.
Add: No.1, CHINT Road, CHINT Industrial Zone,North Baixiang,
Yueqing, Zhejiang 325603,P.R.China
E-mail: [e-mail]
Website: http://en.chint.com