CHINT NXMS Series User manual

NO:2021.04
Standards: IEC/EN 60947-2
User Instructions
NXMS series
Moulded-Case Circuit-Breaker

Safety Warning
1
2
3
4
Installation in any damp, condensed-phase environment with inflammable
and explosive gas is forbidden. Do not operate the product with wet
hands.
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.
This product must not be installed in the place where gas medium can
corrode metal and damage insulation.
In order to avoid dangerous accidents, the installation and fixation of
products must be carried out in strict accordance with the requirements of
the instructions.
This product has been designed for environment A. Use of this product in
environment B may cause unwanted electromagnetic disturbances in which
case the user may be required to take adequate mitigation measures.
5
6
EMA
EUR

1
Use Information
a）Ambient temperature for normal use: - 5 ℃ ~ + 40 ℃;
Note: if it is used within the temperature range of - 25 ℃ ~ + 70 ℃, please consult with the manufacturer.
b）If the altitude exceeds 2000m, please consult with the manufacturer;
c）See the product sample for the inverse time lag, temperature compensation curve and altitude
derating curve of the product;
d）Pollution degree: degree 3;
e）Main circuit installation category: Ⅲ;
f）Degrees of protection provided by enclosure: IP30 (except wiring terminals);
g）Rated insulation voltage Ui: 800V (NXMS-160/250):
1000V (NXMS-400/630/1000/1250/1600).
01
NXMS series Moulded-Case Circuit-Breaker
2
Inspection and Test
Figure 1 Inspection
1. Determine
product technical
parameters;
2. Only qualified
and professional
technicians are
allowed for
installation,
operation and
maintenance.
Necessary tools
Cross screwdriver
Hex socket
Type
NXMS-160
NXMS-250
NXMS-1000
Screws Nut Flat
gasket
Spring
washer PCS
M4×45
M4×90
M5×75
M6×90
M5×140
4
4
4
4
4
NXMS-400
NXMS-630
NXMS-1250
NXMS-1600

NXMS series Moulded-Case Circuit-Breaker
02
Figure 2 Minimum installation distance
Ensure the
minimum
installation
distance
25min Smin
Xmin
Xmin
Unit: mm
Type S X
65
105
100
25
50
NXMS-160
NXMS-250
NXMS-400
NXMS-630
NXMS-1000
NXMS-1250
NXMS-1600
Figure 3 Test
① Re-tripping ② Making ③ Breaking ④ Making ⑤ Tripping
按压
3
Outline and installation size
4×
Under voltage tripper
A
φd
W4
L
L1
B
C
EE1
M
J
W1
F
W5
A1
W3
M
6×φd
F
W2
G
G1
sectional
view of wiring
H4
H3 H2
H1
Hmax
L
L1
B
C
E
E1
J
3P 4P
Figure 4 NXMS series front-panel wiring outline and installation size
Under voltage tripper

03
NXMS series Moulded-Case Circuit-Breaker
Size
type
Size
code
Product type
NXMS-160 NXMS-250 NXMS-400
NXMS-630 NXMS-1000 NXMS-1250 NXMS-1600
C
E
E1
F
G
G1
J
Hmax
H1
H2
H3
H4
L
L1
M
W1
W2
W3
W4
W5
A
A1
B
φd
Outline size Installation size
90
45.5
24.5
29
16.5
7.5
25
112
91
77.5
24.5
24.5
155
135
50
90
120
30
60
90
30
60
130.5
4.5×6
102
51.5
30.5
29
23
11
25
123
102
87
24.5
24.5
165
145
101.5
105
140
35
70
105
35
70
126
4.5
150
84.7
46
50
30.5
12.5
25
161
108.5
97.5
41.5
41.5
257
225
104
140
185
44
88
132
44
88
194
7
170
100
52
60
44.5
15
25
168
118
106
43
43
280
243
106
210
280
70
140
210
70
140
243
7.2
175
120
37.8
78
53
15
25
202
153
143
57
57
207
158
148
65
65
370
342
92.5
210
280
70
140
210
70
140
314
6
Table 1 - NXMS Series Outline and Installation Size Unit: mm

NXMS series Moulded-Case Circuit-Breaker
04
M2
φd1
WW WW WW
P2
P3
P1
P2
P3
3P 4P
W W
A
B
L2
6×φD 4×φd3
W
A
B
L2
8×φD 6×φd3
W W
N
A
φd1
W W W
P1
P2
Figure 4 NXMS-160/250 back-panel
wiring outline and installation size
Figure 5 NXMS-400/630 back-panel
wiring outline and installation size
Figure 6 NXMS-1000 back-panel wiring outline and installation size
Figure 7 NXMS series back-panel wiring mounting plate hole size

05
NXMS series Moulded-Case Circuit-Breaker
P4 P9
K
M1
L2
L6 L6
4×φd2 6×φd2
Q
L7 L8
P6
P5
P7
P8
P6
P5
Installation diagram Mounting plate hole size (3P) Mounting plate hole size (4P)
L5 L4
K
L5
L4
P8
P6
Figure 8 NXMS-400/630/1000
plug-in structure
Figure 9 NXMS-160
plug-in structure
Figure 10 NXMS-250
plug-in structure
Figure 11 NXMS series plug-in wiring outline and installation size
Table 2 - NXMS series back-panel wiring outline and installation size Unit: mm
Size type Size code
Product type
NXMS-160 NXMS-250 NXMS-400
NXMS-630 NXMS-1000
Outline size
W
P1
P2
P3
P4
P5
P6
P7
P8
P9
M2
30
--
63.5
96.5
38
--
75
--
135
M8
35
--
67.5
108.5
47.5
77
95
132
150
M10
44
18
58
93
60
88
111
--
--
25
--
70
20
84
--
87
143.5
158.5
--
--
27
--
13

NXMS series Moulded-Case Circuit-Breaker
06
Size type Size code
Product type
NXMS-160 NXMS-250 NXMS-400
NXMS-630 NXMS-1000
Outline size
Installation size
φd1
M1
φd2
φD
B
L2
L4
L5
L6
L7
L8
K
Q
A
φd3
8
11
130.5
135
106
167
3P:94/4P:124
--
--
3P:60/4P:90
72
30
4.5
--
M10
6
12
126
147
108
184
3P:107/4P:142
--
--
3P:70/4P:105
76
35
4.5
9
33
194
225
168
283
3P:142/4P:187
169
281
3P:88/4P:132
145
44
φ16
M12
12
40
243
243
177
309
3P:214/4P:284
181
305
3P:90/4P:185
146
70
7
4
Installation and Wiring
Installation
connect to breaker 25.5
4
12.5
14.5
φ8.2
7.540.5
M8-6H
M8×16 10N·m
c ≤ 5
Cross sectional area: s
s(b×c)≥70
11 ≤ × 13≤
a ≤ 7.5 a ≤ 7.5
b ≤ 16 b ≤ 16
φ8.5
φ8.5
Figure12 NXMS-160 connecting plate and wire size
-- φ12
Table 2 (Continued)

07
NXMS series Moulded-Case Circuit-Breaker
M8×16 12N·m
connect to breaker
23
62
φ10.5 6
40
10
φ8.5 6
21
c ≤ 8
Cross sectional area: s
s(b×c)120≥
11 ≤ 13×≤
a ≤ 10 a ≤ 10
b ≤ 23 b ≤ 23
φ8.5
φ8.5
M10×30 30N·m
connect to breaker
30.5
70
φ10.5
φ14
43
11.5
16
8φ14
φ10.5
70
43
11.5
30.5
c ≤ 13.5
Cross sectional area: s
s(b×c)240≥
19 ≤ × 21≤
a ≤ 11.5
b ≤ 30.5
φ10.5
a ≤ 11.5
b ≤ 30.5
φ10.5
connect to breaker
M10×30 30N·m
30.5
70
φ14
φ10.5
16
43
11.5
8φ14
70
43
11.5
φ10.5
30.5
s(b×c)370≥
s(b×c)≥185
Wire Copper-bar
1 wire
2 wires
(b×c)400s ≥
s(b×c)≥200
c ≤ 13.5 Cross sectional area: s
19 ≤ 21×≤
a ≤ 11.5
b ≤ 30.5
φ10.5 a ≤ 11.5
b ≤ 30.5
φ10.5
M12×35 30N·m
connect to breaker 43
90
φ14
58 15
φ17
8.5
50 10
43
90
φ14
58 15
φ17
50
Cross sectional area: s
2 wires s(b×c)≥300
c ≤ 20
19 ≤ 21×≤
a ≤ 15
b ≤ 43
φ14
Installation
Installation
Installation
Installation
Figure 13 NXMS-250 connecting plate and wire size
Figure 14 NXMS-400 connecting plate and wire size
Figure 15 NXMS-630 connecting plate and wire size
Figure 16 NXMS-1000 connecting plate and wire size

NXMS series Moulded-Case Circuit-Breaker
08
M10×45(1000、1250)
M10×55(1600) 30N·m
connect to breaker 24 5×φ11
15
30
82
38
52
15
30
5×φ11
25
25
77
h
52
45
24
15
82
52
1530
50
77
45
24
15
22
82
15
30
50
74
Unit: mm
Rated current
1600A
1250A/1000A
h
20
15
Installation
Installation
Installation
Installation
Figure 17 NXMS-1250/1600 connecting plate and wire size
Figure 18 NXMS-160/250 connecting plate installation diagram
Figure 19 NXMS-400/630/1000 connecting plate installation diagram
Figure 20 NXMS-1250/1600 connecting plate installation diagram

09
NXMS series Moulded-Case Circuit-Breaker
5
Parameter setting and communication
figure: portable test unit
In (A)
Default Current setting of adjustable overload release: lr (A)
32
63
100
125
160
200
250
300
315
320
400
500
630
800
1000
1250
1600
14-16-18-20-25-28-30-32
32-36-40-45-50-56-60-63
63-70-75-80-85-90-95-100
63-70-75-80-90-100-110-125
80-90-100-110-125-140-150-160
100-125-140-150-160-170-180-200
125-140-150-160-180-200-225-250
150-160-180-200-225-250-280-300
160-180-200-225-250-280-300-315
160-180-200-225-250-280-300-320
200-225-250-280-300-315-350-400
250-300-315-350-400-450-480-500
400-450-480-500-530-560-600-630
500-550-600-630-660-700-750-800
630-680-720-780-820-900-950-1000
630-700-800-900-1000-1100-1200-1250
800-900-1000-1100-1250-1400-1500-1600
32
63
100
125
160
200
250
300
315
320
400
500
630
800
1000
1250
1600
Electronic release
Portable test unit (PTU) interface, interface type: Micro-USB
Neutral protection setting current multiple (4P)
(0.5、1.0) × In 、OFF 、OFF ，3 gears
Default
OFF
Isd (xIr) Ii (xIn)
PTU
OFF OFF
1.00.5
NIr (A)
tr (S)
80
90
100 110 125
160
150
140
12
60 80
100
Run
OFF OFF
0.9Ir
1.2Ir
1.5
2
3 4 5 6
82
3
4 6 8 10
12
T
tr
0.3s
Ir 2Ir Isd li I
① ② ③
⑧
⑩
④ ⑤ ⑥
For distribution
protection
For motor
protection
Default
At 2xlr, corresponding tripping time: tr (s)
Inm ≤250A:12 、60 、80 、100 ，4 gears 12
Inm ≥400A:12 、60 、100 、150 ，4 gears
Trip class
10A 、10 、20 、30 ，4 gears
Default
10A
Short time pick-up current: lsd
(1.5、2、3、4、5、6、8) × Ir + OFF ，8 gear
Default
OFF
⑦
⑨

NXMS series Moulded-Case Circuit-Breaker
10
Tool: slot type screwdriver
2.5
Trip characteristic curve
Operation indicator, flashing during operation
① Open the transparent cover with a slot screwdriver
click
② Adjust the parameter value
of each knob as required
③ Close the transparent cover and
seal it with lead if neccessary
This example:
tr is set to 100 seconds
Total rotational angle: 235 °± 10 °
Start End
tr ( )
S
12
60 80
100
Short circuit short delay tripping time: tsd, 0.3s by default
Note: can be customized, select one gear among
0.2s 0.3s 、0.4s 、0.5s 、0.6s 、0.7s 、0.8s 、0.9s、
Rated instantaneous short time current setting: li
(2、3、4、6、8 10 12) × In + OFF, 8 gear、 、
(2、4、6、8 10 12 ) × In + OFF, 8 gear、 、 、14
Default
12
14
For distribution
For motor
Pre - warning and overload indicator, flash during pre-warning
(0.9lr~1.2lr) , and normally on when overload ( ＞1.2lr)
Figure 21 Parameter setting
⑩

11
NXMS series Moulded-Case Circuit-Breaker
Breaker N
18
30.5
150Min
L
Tool: cross screwdriver
Slot type screwdriver
3.5
2.5
①Open the cover, connect the
communication port and close again
② Connect the COMA-3 module
and power on the module (24VDC/220VAC)
Internal communication line
Signal converter
COMA-3
module
RS485 signal
USB/RS485
RS232/RS485
... ...
③ Debug according to the
communication protocol
Default communication parameters
Protocol
Modbus-RTU
Address
1
Baudrate
9600bps
Data bit
8
Parity bit
Even
Stop bit
1
Product type
Installation size N
Handle size L
61.5 63.5
65 95
98 97 68.5
NXMS-160 NXMS-250 NXMS-400
NXMS-630
NXMS-1250
NXMS-1600
NXMS-1000
10
77
45 °
53
φ36
2x φ5.5
(L Other sizes can be selected through
consultation with the manufacturer)
Schematic diagram
of handle installation
NXMS-160/250
400/630/1000
NXMS-1250/1600
6
Attachment information
Figure 23 Manual operation mechanism installation size
Table 3 - NXMS series manual operation mechanism installation size Unit: mm
Figure 22 Communication module

NXMS series Moulded-Case Circuit-Breaker
12
1. Flash barrier must be installed before operation.
2. Check if the wiring is correct.
3. After installation, the insulation resistance shall
be not less than 10 MΩ.
Figure 25 Flash barrier or protective guard
Insert in the direction of the
arrow on the flash barrier
K
A
K
A
Electric oper ating mechanism
Rated control supply voltage
ON
TRIPPED
OFF
PUSH TO TRIP OFF
RESET
ZHEJIANG CHINT ELECTRICS CO., LTD.
Electric oper ating mechanism
Rated control supply voltage
ON
TRIPPED
OFF
PUSH TO TRIP OFF
RESET
ZHEJIANG CHINT ELECTRICS CO., LTD.
B
B1
B2
T
Figure 24 Electric operating mechanism outline and installation size
Table 4 – NXMS series electric operating mechanism outline and installation size Unit: mm
Size type Size code
Product type
NXMS-160 NXMS-250 NXMS-400
NXMS-630
NXMS-1250
NXMS-1600
NXMS-1000
Outline size
Installation
size
K
B1
B2
T
A
B
90
116
53
97
30
130.5
90
116
60.5
97.5
35
142
130
176
88
154
44
194
130
176
88
154.5
70
243
130
176
88
156
70
314
7
Warranty
Under the normal storage and transportation conditions, if product packaging or product remains
intact, the product warranty period shall be 24 months from the date of production.

QC PASS
Test date: Please see the packing
ZHEJIANG CHINT ELECTRICS CO., LTD.
NXMS series
Moulded-Case Circuit-Breaker
IEC/EN 60947-2
Check 17
13
NXMS series Moulded-Case Circuit-Breaker
The following situations are not covered by the warranty:
1) Damage caused by user's improper use, storage and maintenance;
2) Damage caused by the organization or personnel not designated by the company, or by disassembly
and maintenance without authorization;
3) The warranty expires;
4) Damage caused by force majeure.
8
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.

NXMS series
Moulded-Case Circuit-Breaker
User Instructions
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