CHINT NM1 Series Installation instructions

NO:2021.04

Standard: IEC/EN 60947-2

GB/T 14048.2

User Instruction

NM1 Series

Moulded Case Circuit Breaker

Safety Warning

Only professional technicians are allowed for installation and maintenance.

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.

Operating conditions

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) Please refer to the catalogue for the time-current characteristics and the correction coefficient

regarding to temperature and altitude

c) Pollution degree: grade 3

d) Class of pollution: Class 3

e) Main circuit installation category: Ⅲ

f) IP degree: IP30

g) Rated insulation voltage Ui: 800V;

Inspection and Test

NM1 Series Moulded Case Circuit Breaker

Smin

25min

20min

Figure 1 Inspection

Model

NM1-63H

NM1-125

NM1-250

NM1-400

NM1-630

NM1-800

NM1-1250

NM1-63S M4×30

M4×45

M6×75

M6×90

M8×40

Unit: mm

NM1-63

NM1-125

NM1-250

NM1-400

NM1-630

NM1-800

NM1-1250

Model S

100

Determine

product

technical

parameters;

Mounting screw Quantity

tool

Cross screwdriver

Allen wrench

Hexagon wrench

Figure 2 Minimum installation distance

Ensure

minimum

installation

distance

NM1 Series Moulded Case Circuit Breaker

①

Re-trip

②

Switch on

③

Switch off

④

Switch on

⑤

Press trip

CLICK！

Figure 3 Test

Overall and mounting dimensions

Figure 4 NM1-63、125、250

Undervoltage release

Flash barrier

W1 W1

Flash barrier

2XΦd

4XΦd H

H1(max)

W1 W1 W1

6X dΦ

3P 4P

Undervoltage release

Table 1 Outline and Installation Size of NM1-63、125、250

Size type

NM1-63S

NM1-63H

NM1-125S

NM1-125

H、R

NM1-125

H/2P

NM1-250S

NM1-250

H、R

NM1-250

S /2P

Product model

Size code

Outline

size

6.5

100

17.5

7.5

17.5

7.5

104

17.5

7.5

102

11.5

110

102

11.5

103.5

127

102

11.5

85.5

109

Unit: mm

NM1 Series Moulded Case Circuit Breaker

Size type

NM1-63S

NM1-63H

NM1-125S

NM1-125

H、R

NM1-125

H/2P

NM1-250S

NM1-250

H、R

NM1-250

S /2P

Product model

Size code

Outline

size

Φd

135

235

117

4.5

135

235

117

103

117

4.5

155

255

136

120

130.5

4.5X6

155

255

136

120

130.5

4.5×6

150

250

130

129

4.5

3.5

5.5

165

362

144

105

140

126

3.5

5.5

165

362

144

105

140

126

3.5

5.5

165

362

144

126

Installation

size

Table 1 (Continued)

Figure 5 NM1-400、630、800、1250

H1(max)

W1 W1

4XΦd

A A1

W1 W1 W1

6XΦd

Flash barrier

Undervoltage release

Flash barrier

NM1 Series Moulded Case Circuit Breaker

Size type

NM1-400

S、H、R/3P

NM1-400

S、H/4P

NM1-630

S、H、R/3P

NM1-630

S、H/4P

NM1-800

S、H、R/3P

NM1-800

S、H/4P

NM1-1250

S/3P

NM1-1250

H/3P

Product model

Size code

Outline

size

Φd

128

174

11.5

107.5

162

4.5

257

466

224

150

194

128

174

11.5

107.5

162

4.5

257

466

224

198

194

136

184.5

40.5

15.5

112

164.5

6.5

3.5

4.5

270.5

472

234

182

200

136

184.5

40.5

15.5

112

164.5

6.5

3.5

4.5

270.5

472

234

240

200

136

204

116

168

4.5

280

490

243

210

243

136

204

116

168

4.5

280

490

243

280

243

204

316

100

141

202

55/57

4.5

406

710

210

375

204

345.5

100

141

202

55/57

4.5

406

715

210

375

Installation

size

Table 2 Outline and Installation Size of NM1-400、630、1250

Unit: mm

Note: The total length of NM1-1250H + body connection plate is 545mm.

Installation and wiring

Figure 6 NM1-63S connecting plate and wire size

Installation

M6×12 4N·m

C≤4

11≤X≤13

a≤7

b≤17 b≤17

Φ7

a≤7

14.5

Φ8.2

40.5

25.5

Φ6.5

7.5

12.5

Cross area

s(b×c)≥

NM1 Series Moulded Case Circuit Breaker

Figure 7 NM1-63H connecting plate and wire size

Figure 8 NM1-125 connecting plate and wire size

Figure 9 NM1-250 connecting plate and wire size

Figure 10 NM1-400 connecting plate and wire size

Figure 11 NM1-630 connecting plate and wire size

Installation

14 4

M5×10 3N m·

12 Φ6

2138

M8-6H

Cross area

s(b×c)≥16

C≤4

10≤X≤13

a≤6b≤12

Φ5.5

b≤12

Φ5.5

a≤6

M8×16 8N m

Φ8.2

40.5

25.5

M8-6H

7.5

14.521.5

C≤4

10≤X≤13

a≤7

b≤15 b≤15

Φ8.5

a≤7

Cross area

s(b×c)≥50

M8×16 10N m

27 R8

9.4

M8-6H

Φ8.810≤X≤13

a≤7a≤7

Φ8.5

b≤22 b≤22

C≤6

Cross area

s(b×c)≥120

M10×30 22N m

Φ14

Φ10.5

827 8

Φ14

Φ10.5

16.5≤X≤18

Φ10.5

a≤12 b≤30 a≤12 b≤30

C≤9.5

Cross area

s(b×c)≥240

M12×35 26N m·

Φ13

C≤10

19≤X≤21

b≤40

Φ13

a≤14.5 a≤14.5

Φ13

b≤40

s(b×c)≥185

Double s(b×c)≥200

s(b×c)≥370

Single s(b×c)≥400

Wire Copper bar

NM1-63S NM1-63H

NM1-125S

NM1-125H

NM1-125R

NM1-250S

NM1-250H

NM1-250R

NM1-400S

NM1-400H

NM1-400R

NM1-630S

NM1-630H

NM1-630R

NM1-800H

NM1-800R

NM1-1250S

NM1-1250H

NM1 Series Moulded Case Circuit Breaker

Figure 12 NM1-800 connecting plate and wire size

Installation

Figure 13 NM1-1250 connecting plate and wire size

Installation

M12×60 30N m

C≤15

16≤X≤18

2×Φd＞12

≤45

Cross area

2×(s≥400)

≤10

2 article

M12×35 28N m

2×Φ14

10 C≤12

9≤X≤2

Φ14

b≤44

Φ14

b≤44

s(b×c)≥240 s(b×c)≥250

s(b×c)≥480 s(b×c)≥500

a≤12 a≤12

Double

Single

Wire Copper bar

Accessory Information

Figure 14 Overall and mounting dimensions of the motor driven mechanism

Size

code

Product model

H 157 166 152 170 182 199 255 262 261 290

Table 3 Dimensions of NM1 Series Motor Driven Mechanism

Unit: mm

NM1 Series Moulded Case Circuit Breaker

Breaker

min=150mm

30.5

Hinge

Diagram of handle

installation opening

Φ36

2XΦ5.5 ≥200

Φ78

Figure 15 Dimensions of manual operated mechanism

NM1-63 NM1-125 NM1-250 NM1-400 NM1-630 NM1-800 NM1-1250

Size

code

Product model

56.5

100

3P:90

4P:100

3P:100

4P:90 103

Table 4 Installation Size of NM1 Series Manual Operating Mechanism

Unit: mm

3P:18

4P:20

3P:20

4P:18

Figure 16 Installation Size of Mechanical Interlocking Mechanism

Switch A Switch B

A C A

8XΦd

A B C D E F L Φd

Product model

NM1-63

NM1-125

NM1-250

NM1-400

NM1-630

NM1-800

Table 5 Installation Size of Mechanical Interlocking Mechanism

Unit: mm

117

130.5

126

194

200

243

100

136

172

168

100

135

155

165

257

270.5

280

186

210

240

330

412

448

4.5

4.5X6

NM1 Series Moulded Case Circuit Breaker

L1 L3 N

Breaker

Tripping release

Ctrl

C1 C2

Power

supply

B14

B12

B11

UC2 UC1 P1 P2

Power

F14

F12

F11

Opening

Ciruit

Figure 17 Wiring of special tripping

release for prepaid electricity meter

Figure 18

Auxiliary contact wiring

Figure 19

Wiring of alarm contact

Figure 20 Wiring of under voltage release Figure 21 Wiring of Shunt release

1 Be sure to install flash

barriers or shield before

product operation.

2 Check if the wiring is

correct.

3 After installation, the

insulation resistance to

the ground shall not be

less than 10m Ω.

Figure 22 Interphase flash barrier or shield

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.

This manual suits for next models

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