CHINT NXMLE Series Installation instructions

NO:2021.04
Standard: IEC/EN 60947-2
GB/T 14048.2
User Instruction
NXMLE Series
Residual Current
Operated Circuit Breaker

Safety Warning
1
2
3
4
Installation in any damp, condensed-phase environment with inflammable
and explosive gas is forbidden.
You are prohibited from touching the conductive part when the product is
operating.
When the product is being installed or maintained, the power must be
switched off.
Do not install it in a place where gaseous media can corrode metals and
damage insulation.
In order to avoid dangerous accidents, the installation and fixation of the
product must be carried out in strict accordance with the requirements of
the user instructions.
This product is suitable for Environment A. Using this product in
Environment B will cause harmful electromagnetic interference. In this case,
users need to take appropriate protective measures.
Cannot directly conduct insulation pressure testing on the product.
The circuit breaker has been tested according to standard before leaving
the factory. As the circuit breaker is equipped with PCB board, if retest is
carried out before installation, the following steps must be followed:
1. Use 500VDC tramegger.
2. When the circuit breaker is in the OFF state, first measure the insulation
resistance between the incoming and outgoing connection plates 1-2, 3-4,
5-6, then measure the insulation resistance between 1, 3, 5 connection
plates and the shell (the shell is covered with metal foil) one by one.
3. The insulation resistance shall not be less than 10m Ω.
Note: The insulation test can also be carried out after separating the PCB
board
5
6
7
8

1
2
Use information
a）The normal operating ambient temperature of the product is - 5 ℃ ~ + 40 ℃;
Note: if it is used within the range of - 25 ℃ ~ + 70 ℃, please consult with the manufacturer
b）If the altitude exceeds 2,000m, please consult with the manufacturer;
c）See the product sample for the product’s inverse time lag characteristic and temperature
compensation curve and altitude capacity reducing and correction factor table;
d）Class of pollution: Class 3;
e）Main circuit installation category: Ⅲ;
f）Enclosure protection class: IP30 (except terminals);
g）Rated insulation voltage Ui: 800V
Inspection and test
01
NXMLE Series Residual Current Operated Circuit Breaker
Figure 1 Inspection
Determine product
technical parameters;
Tool
Cross screwdriver
Model Mounting screw
NXMLE-125
S
H
S
H
S
H
Nut Flat
gasket
Spring
washer
Quantity
2P 3P 4P
2
-
2
-
2
-
-
M4×62
M4×72
M4×45
M4×60
M5×85
NXMLE-160
NXMLE-250
NXMLE-400
NXMLE-630
4
4
4
4
4
4
4
4

NXMLE Series Residual Current Operated Circuit Breaker
02
Unit: mm
Model S X
50 25
100 50
NXMLE-125
NXMLE-160
NXMLE-250
NXMLE-400
NXMLE-630
Smin
Xmin
25min
Xmin
Trip button
Adjustment knot
Straight
screwdriver
100
30
10050
Adjustment knot: Adjust and set rated
residual operating current
①
Re
trip
②
Switch
on
③
Switch
off
④
Switch
on
⑤
Press
to trip
CLICK!
CLICK!
Figure 2 Minimum installation distance
Ensure minimum
installation distance
Panel button and
indication function description
Operation diagram of
leakage current gear adjustment
Leakage indicatig
button
Leakage test button
Leakage indicating button: Normal
Leakage
Leakage test button: confirm whether
the leakage function is normal, and
operate it at least once a month.
Trip button: confirm and test the
operation performance of the product.
AC type residual current operated circuit
breaker
A type residual current operated circuit breaker
Figure 4 Schematic diagram of operation test
Figure 5 Schematic diagram of leakage function test operation (power-on test required)
①
Re trip
②
Switch on
③
Press trip
④
Press reset

03
NXMLE Series Residual Current Operated Circuit Breaker
Figure 6 Outline and Installation Size of NXMLE Series
3
Outline and installation size
W3
L
L1
B
C
EE1
L
L1
B
C
M
W
F
2×Φd
W4
A
M
E1
E
4×Φd
F
W1
L
L1
B
CEE1
M
W5
W3
A1
6×Φd
F
W2
J
J
H4
H3 H2
H1Hmax
G1
G
Par tial section al
view at the wiring
Table 1 Outline and Installation Size of NXMLE Series
Size
type
C
E
E1
F
G
G1
J
Hmax
H1
H2
H3
H4
L
L1
M
W
108
55.5
38
23
18
8.5
17.5
91 101
70.5 80.5
63.5 73.5
21 31
21 31
156
142
49
56
93
51.7
27
29
16.5
7.5
25
96 112
75.5 91
62 77.5
24.5
24.5
160
140
50
63
102
56
33
29
23
11
25
98 101
77 80
61.5 64.5
24.5 24.5
24.5
170
150
101.5
78
150
92
51
50
33
11.5
25
160
107.5
98.5
40.5
41.5
267
235
104
-
Size
code
Product model
NXMLE
-125S
NXMLE
-125H
NXMLE
-160S
NXMLE
-160H
NXMLE
-250S
NXMLE
-250H
NXMLE-400
NXMLE-630
Product
Dimension
Unit: mm

NXMLE Series Residual Current Operated Circuit Breaker
04
Table 1 (Continued)
Size
type
W1
W2
W3
W4
W5
A
A1
B
Φd
78
103
25
50
75
25
50
138
4.2
90
120
30
60
90
30
60
135.5
4.5×6
105
140
35
70
105
35
70
131
4.5
140
185
44
88
132
44
88
228
7
Size
code
Product model
NXMLE
-125S
NXMLE
-125H
NXMLE
-160S
NXMLE
-160H
NXMLE
-250S
NXMLE
-250H
NXMLE-400
NXMLE-630
Product
Dimension
Installat-ion
Dimension
Unit: mm
4
Installation and Wiring
Figure 7 NXMLE-125 connecting plate and wire size
6.8
6
Figure 8 NXMLE-160 connecting plate and wire size
M6×12 4N m
·
Φ6.5
Φ8.2
7
Cross-sectional area
s(b×c)≥50
c≤4
11≤X≤13
Φ6.5
a≤8
b≤17.5
a≤8
Φ6.5
b≤17.5
This side
connect with breaker 25.5
40
4
17 4
12.5
M8×16 10N·m
4
12.5
14.5
25.5
M8-6H
40.5
7.5
Φ8.2
Cross-sectional area
s(b×c)≥70
c≤5
11≤X≤13
Φ8.5
a≤7.5
b≤16
a≤7.5
Φ8.5
b≤16
This side
connect with breaker

6.8
6
NXMLE Series Residual Current Operated Circuit Breaker
05
9
8
9
8
M8×16 12N·m
23
Φ10.5
Φ8.5
6
6
21
62
40
10
Cross-sectional area
s(b×c)≥120
c≤8
11≤X≤13
Φ8.5
a≤10
b≤23
a≤10
Φ8.5
b≤23
30.5
30.5
16
43
43
70
70
11.5
11.5
Φ10.5
Φ10.5
Φ14
Φ14
8
Cross-sectional area
s(b×c)≥240
c≤13.5
19≤X≤21
Φ10.5
a≤11.5
b≤30.5
a≤11.5
Φ10.5
b≤30.5
M10×30 30N m·
30.5
30.5
16
43
43
70
70
11.5
11.5
Φ10.5
Φ10.5
Φ14
Φ14
8c≤13.5
19≤X≤21
Φ10.5
a≤11.5
b≤30.5
Cross-sectional area
s(b×c)≥370 s(b×c)≥400
s(b×c)≥185 s(b×c)≥200
a≤11.5
Φ10.5
b≤30.5
M10×30 30N m
·
This side connect
with breaker
R2
This side connect
with breaker
This side connect
with breaker
Double
Single
cables
Copper bar
Figure 11 NXMLE-630 connecting plate and wire size
Figure 10 NXMLE-400 connecting plate and wire size
Figure 9 NXMLE-250 connecting plate and wire size

NXMLE Series Residual Current Operated Circuit Breaker
06
5
Leakage Wiring Diagram
LINE
SB
TA
RT
LOAD
IC
QI
135N
246N
LINE
SB
TA
RT
LOAD
IC
QI
246N
135N
SB：Test button
TA：Zero sequence current
Transformer
RT：Test resistance
IC：Integrated circuit
1P+N 2P 3P
3P+N 4P
Figure 12 Flash barrier
Insert in the direction of the
arrow on the flash barrier
①Be sure to install flash barriers
before product operation.
②Check if the wiring is correct.
③After installation ,the insulation
resistance to the ground shall
not be less than 10MΩ.
6
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.
LINE
SB
TA
RT
LOAD
IC
QI
246N
135N
LINE
SB
TA
RT
LOAD
IC
QI
135
246
LINE
SB
TA
RT
LOAD
IC
QI
135N
246N

QC PASS
Test date: Please see the packing
ZHEJIANG CHINT ELECTRICS CO., LTD.
NXMLE Series
Residual Current
Operated Circuit Breaker
IEC/EN 60947-2
GB/T 14048.2
PD1 Check 15
07
NXMLE Series Residual Current Operated Circuit Breaker

NXMLE Series
Residual Current
Operated 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