CHINT NCH8-20 2P, NCH8-63 2P User Instruction

NO:2020.04
NCH8 Series
Modular AC Contactor
User Instruction
Standard:IEC/EN 61095
Safety Warning
1 Only professional technicians are allowed for installation and
maintenance;
2 It is strictly prohibited to install in the environment containing
inflammable, explosive gas and moist condensation.
3 Power must be turned off when installing, maintaining and
maintaining the product.
4 Do not touch the conductive part of the product during
working.
1 Purpose of Use and Range of Application
NCH8 series modular AC contactor is mainly used in AC 50Hz (60Hz)
power systems with rated operating voltage up to 400V and rated operating
current up to 63A. The product is used as remote switch and control circuit
under AC-1/AC-7a application category (non-inductive or low inductive
load/resistance furnace,domestic appliance and low inductive load of similar
applications). The contactor can also be used for AC-7b application category
(household motor load), but it must be derated.
The contactor is not designed to break short circuit current, therefore it
should be used with a matching short circuit protector.
2 Main Technical Parameters and Performance
Table 1 Main parameters and technical
performance index of the contactor
Model
NCH8 NCH8 NCH8 NCH8 NCH8 NCH8 NCH8 NCH8
-20 2P -20 4P -25 2P -25 4P -40 2P -40 4P -63 2P -63 4P
Rated insulation
voltage Ui(V)
500
Rated impulse withstand
voltage Uimp(kV)
4
Conventional thermal
current Ith(A)
25
Rated
AC-1/AC-7a
operating
AC-7b
current Ie(A)
Rated voltage Ue(V)
Operation AC-1/AC-7a
frequency
AC-7b
(time/h)
230
63
20
25
40
63
9
9
15
20
400
230
400
230
400
360
360
Electrical life
AC-1/AC-7a
(10000 times)
180
10
Mechanical life
(10000 times)
100
01
230
400
Model
NCH8 NCH8 NCH8 NCH8 NCH8 NCH8 NCH8 NCH8
-20 2P -20 4P -25 2P -25 4P -40 2P -40 4P -63 2P -63 4P
Coil control power
voltage Us(V)
24、220/230、240
Operation
range
Pick-up
voltage
85%~110%Us
Release
voltage
20%~75%Us
Enclosure protection
degree
IP20
Rated duty system
8-hour duty, uninterrupted duty, intermittent periodic duty
Ambient temperature
-5℃~+40℃
Humidity
relative humidity＜50% at +60℃; up to 90% at +20℃
Altitude
No influence below 2000m
Pollutin class
Class 2
Installation category
II
3 Installation
1) See Table 2 for outline and installation dimensions.
Table 2 Overall and installation dimensions of NCH8
Unit:mm
Model
D
L
L1
L2
H
H1
NCH8-20~25
18
36
85
35.5
45
66.5
50
NCH8-40~63
36
54
85
35.5
45
66.5
50
2 poles 4 poles
02
Unit:mm
D
L1
L2
L
H1
H
Figure 1 NCH8
Unit:mm
D
9
Figure 2 Installation dimensions of partition
03
2) Installation method: use TH35-7.5 steel mounting rail, see Figure 3
below.
①
②
③
NCH8-20~25 2P
Figure 3 NCH8 installation diagram
3) Wire selection and connection method: applicable to copper wire
connection, please refer to Table 3 below for wire category, sectional area,
strip length and tightening torque, see Figure 4 below for connection
method.
04
Table 3 Connection requirements for copper wire
Unit:mm2
12mm
A
B
C
D
1~4
E
F
G
H
1~2.5
M3.5
10.5mm
A1
A2
Model
Code
NCH8-20
NCH8-25
NCH8-40
NCH8-63
0.8N.m
A
1~2.5
1~4
1~2.5
1~4
B
C
D
E
F
G
H
M3.5
0.8N.m
1~4
1~2.5
1~4
1~2.5
1~4
1~2.5
M5
2.0N.m
2.5~16
2.5~6
2.5~16
2.5~6
2.5~16
2.5~6
Note: You can connect up to 2 wires with same type and sectional area.
A1 1 3
1
A1
3
A2 2 4
1
3
A1
A2 2 4
NCH8-20~63/20
A1
R1 R3
A1
1
1
R1
A2 2 R2
NCH8-20~63/11
3
5
7
A2 R2 R4 A2 2 4 6 8
NCH8-20~63/02
NCH8-20~63/40
2
4
A1
R1
A1
A2 R2
NCH8-20~25/01
1
A2 2
NCH8-20~25/10
Figure 4 NCH8 connection method
05
A1
R1
1
3
R3
A2 R2 2 4 R4
NCH8-20~63/22
A1 R1
1
3
5
A2 R2 2 4 6
NCH8-20~63/31
4 Maintenance
Check the operation of the contactor every month. Method: The
contactor should incline 5° forward upon picking up and 5° backward upon
release; check if the contactor can operation smoothly.
Conduct inspection and maintenance every month. Note: The product
should not be assembled, disassembled or maintained at will. Please
replace the product if it is damaged.
Table 4 Analysis and Troubleshooting of Faults
Symptoms
Cause analysis
Troubleshooting method
The control power voltage does
not comply with coil voltage.
Use control power that has the
same voltage as the coil
No operation Insufficient operation circuit
Check the circuit to ensure correct
or operation power capacity; disconnection or
connections
is not reliable wrong connection occured.
Noise
Coil is burnt; movable
mechanical parts are jammed
Replace the product
There is foreign objects on the
polar face of magnet yoke ora
rmature
Replace the product
The control power voltage is too Use control power that has the
same voltage as the coil
low.
The contactor Contact welding
does not
There is stain or dust on the
release or
release slowly polar face of the iron core.
Replace the product
Replace the product
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.
06
QC PASS
NCH8 Series
Modular AC Contactor
IEC/EN 61095
Check 10
Test date: Please see the packing
ZHEJIANG CHINT ELECTRICS CO., LTD.
07
NCH8 Series
Modular AC Contactor
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: [email protected]
Website: http://en.chint.com
">