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文件编号

Doc. No.

NDT2920257

版次

Edition

2

Version 2

实施日期

Implementation date

2019-08-19

2

1.

适用范围与用途

Application Scope and Purpose

本断路器主要应用于交流

60Hz

,额定工作电压

240V

480V

600V

,额定工作电流至

400A

的电

路中作不频繁转换之用。具有过载长延时反时限、短路短延时反时限、短路短延时定时限、短路瞬时,
能保护线路和电源设备不受损坏。

The  Circuit-breaker  is  mainly  used  in  the  circuit  of  AC  60Hz,  rated  working  voltage 

240/480V/600V  and  rated  working  current  up  to  400A.  Provided  with  overload  long-delay  inverse 
time, short circuit short-delay inverse time, short circuit short-delay definite time and instantaneous 
short circuit ,the breaker can protect the circuit and electric power unit from being damaged.

2.

型号说明

Description of model 

型号说明见下表

1

Description of model is shown as follow Table 1:

1

型号说明

Table 1 Description of model

ND M 3 

 

/

 

 

 

 

  

/

  

1   2 

    

3

 

 

4  

   

  

6    7    8   9 

 

10 

 

11    12   13

序 号

No.

序号名称

Description 

NDM3A

NDM3A

1

企业代号

Enterprise code

ND Nader

牌低压电器

ND Nader brand low-voltage 
apparatus

2

产品代号

Product code

塑料外壳式断路器

M Molded case circuit breaker 

3

设计序号

Design code

3

3

4

派生代号

Derived code

EU

:电子式

UL

EU: Electronic type for UL

5

壳架额定电流

(A)

Frame rating current

A

400

400

6

分断能力代号

Breaking capacity 
code

M

:高分断型

L

:低分断型

M

High interrupting type

L

Low interrupting type

7

极数

3:3

3

3P

2019.12.31

文件控制

Summary of Contents for NDM3EU-400

Page 1: ...ons Doc Code NDT2920257 Edition 1 Version 1 Product Model and Name NDM3EU 400 NDM3EU 400 MCCB Implementation Date 2019 08 19 Shanghai Nader Electrical Co Ltd NDM3EU 400 NDM3EU 400 Electronic MCCB Oper...

Page 2: ...19 1 Contents 2 Application Scope and Purpose 2 Description of Model 3 Technical Parameters 7 Working Environment 8 Dimensions and Installation Dimensions 9 Installation 10 Accessories 11 Operation a...

Page 3: ...and instantaneous short circuit the breaker can protect the circuit and electric power unit from being damaged 2 Description of model 1 Description of model is shown as follow Table 1 1 Table 1 Descri...

Page 4: ...and Bottom Horizontal Z2H4 Plug in Rear Connection Top Horizontal and Bottom Vertical 12 Ir A Setting current Ir A AC 250 AC 300 AC 350 AC400 AC 250 AC 300 AC 350 AC 400 13 Certification code U UL489...

Page 5: ...UPS working environment by customer Pollution class 3 Protection class IP20 Circuit breaker UL489 Certification Lug UL486E Accessories Terminal cover Double Auxiliary Contacts Shunt Trip Plug in Pre...

Page 6: ...rating Suitable combinations of current and time are adjusted by this knob so as to protect circuits and devices This operation should be done by specialized technical personnel 1 Tr Ir 2 Ir 400A Tr...

Page 7: ...lay a Ir 3 a Setting current Ir of overload long delay Allowable deviation is 3 b Tr 10 b Setting time Tr of overload long delay Accuracy of action time is 10 c I 1 15 Ir tr 2 Ir I 2 Tr c When actual...

Page 8: ...ing Environment 4 1 3 Storage condition is shown as follow Table 3 3 Table 3 Storage condition Item Specifications Ambient temperature 40 75 Relative humidity 25 95 when ambient temperature is 25 95 4...

Page 9: ...eed 50 at 40 the lowest temperature in the most humid month should not exceed 25 and the highest humidity in this month should not exceed 90 while condensation on breaker surface caused by temperature...

Page 10: ...low Table 6 6 Table 6 Installation dimensions Installation dimension Model L mm W mm H mm Y mm X mm mm Circuit breaker 277 150 123 204 48 6 Circuit breaker Plug in 357 150 155 158 70 6 2 6 Installatio...

Page 11: ...to test shunt release in the main circuit 4 12M 4 Insulation resistance should not be lower than 12M 6 2 Mounting method 3 4 Please install the breaker on flame retardants such as metal etc It can be...

Page 12: ...ram of shunt release is shown as follow Fig 5 5 Fig 5 Wiring diagram of shunt release 7 2 Auxiliary contact 7 3 Peripheral control circuits of connection of auxiliary contacts 8 Technical Data of auxi...

Page 13: ...at no short circuit or short to ground occurs between terminals of opposite polarity or exposes live parts 3 3 Check that terminal connection and fixing bolts are fastened without looseness 8 2 Commis...

Page 14: ...cludes following procedures 1 5 1 Re trip the breaker close and open the breaker use trip button to trip the breaker when it is closed repeat for 5 times to check that the breaker can reliably re trip...

Page 15: ...breaker with wet hands or electric shock would be resulted 2 2 Frequent operation will shorten service life of the breaker This product is manufactured in a sophisticated quality management system In...

Page 16: ...er can functions normally or the breaker will be replaced with a charge 10 Ordering Instruction 10 1 10 1 Customer should confirm that he or she is familiar with technical files of this product and pl...

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