CHINT. NM7 Moulded Case Circuit Breaker

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Miranda Benson
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1 CHINT Moulded Case Circuit Breaker

3 Moulded Case Circuit Breaker Application Product introduction Functions and characteristics Accessories Overall and dimension Specification selection and order Page 01 Page 01 Page 02 Page 05 Page 07 Page 08

4 New Series Moulded Case Circuit Breaker

5 Product highlights More comprehensive Breaking capacity:18ka, 25kA, 36kA; Provide distribution protection, motor protection, etc. More flexible Theromannetic dual adjustable (except ln 63A); Over-load operation current range: ( ) ln; Instantaneous operation current range: (6-8-10) ln for distribution; ( ) ln for motor protection. More economical Modular accessories, which can be freely choosed according to the requirement; Less expense on your equipment. Thermomangetic dual adjustable Modular accessories New Series Moulded Case Circuit Breaker

6 Moulded Case Circuit Breaker 1.Application Nm7 new series moulded case circuit breaker (overload and shortcircuit current can be adjusted ) is a new type breaker developed with international advanced technology. The breaking capacity includes 18kA,25kA and 36kA,which appropriately meets the needs of low-breaking application market. The overload current and short-circuit current can be adjusted. It can also be used for frequent motor start and for motor overload, and under-voltage protections. 2.Product introduction General characteristics Standard:IEC Certification: CE Main size parameters: Range available : 125A, 250A Rated operation range: 25A~250A Available in 3 poles & 4 poles Installation types: fixed type Operating conditions Ambient air temperature: The upper limit for the ambient air temperature is+40, lower limit -5, and the average temperature is not higher than+35 within 24 hours. Altitude: Not higher than 2000m at the installation site. Atmospheric conditions: When the ambient air temperature is +40, the relative humidity of the air shall not be higher than 50%; a higher relative humidity is allowed at a lower temperature;for the wettest month, the maximum relative humidity averaged shall be 90% while the lowest temperature averaged in that month +25, and the condensation produced due to temperature change shall be taken into consideration. Class of pollution: 3 P-01 > >>

7 3.Functions and characteristics Technical data Rated current In(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Rated operational voltage Ue(V) -125 K 25,32,40,50,63,80,100, Appearance Breaking capacity feature code Number of poles Rated ultimate short circuit breaking capacityicu(ka) AC380/400/415V E/N/F /25/36 18/25/36 Rated service short circuit breaking capacityics(ka) AC380/400/415V 18/25/36 18/25/36 Service life (C-O cycle) Usage category Overall dimensions (mm) Isolating function Front connection panel Rear connection panel Cage type connection terminal Plug-in type Draw-out type Rotary manual operating handle Motor driven operating handle Shunt, under voltage release Auxiliary, alarm contact Mechanical Electrical 3P( L W H) 4P( L W H) > >> P-02

8 Technical data Rated current In(A) Rated insulation voltage Ui(V) Rated impulse withstand voltage Uimp(kV) Rated operational voltage Ue(V) -250 K 125,160,180,200,225, Appearance Breaking capacity feature code Number of poles Rated ultimate short circuit breaking capacityicu(ka) AC380/400/415V E/N/F /25/36 18/25/36 Rated service short circuit breaking capacityics(ka) AC380/400/415V 18/25/36 18/25/36 Service life (C-O cycle) Usage category Overall dimensions (mm) Isolating function Front connection panel Rear connection panel Cage type connection terminal Plug-in type Draw-out type Rotary manual operating handle Motor driven operating handle Shunt, under voltage release Auxiliary, alarm contact Mechanical Electrical 3P( L W H) 4P( L W H) Note: Standard configuration Selected configuration; the one with is not available. Distribution proteciton Primary distribution ACB Branch distribution MCCB Terminal distribution MCB P-03 > >>

9 Over-load protection(lr) IR xin Over-load protection function: Tripping current has the inverse-time characteristic, and different over-load current corresponds to different tripping time. The inverse-time protection curves of make the circuit has some overload capacity, which ensure continuous power supply. Conventional tripping current: Setting range: lr=( ) ln Short circuit protection(li) Ii 6 10 xin 8 Short circuit protection function: When the current exceed the agreed tripping current value, the release works and break the circuit. Conventional tripping current: Setting range: li=(6-8-10) ln Inverse-time overcurrent protection curve for the breaker for distribution (see Fig. 1 6) Fig K(25A~32A) operation characteristic curve Fig K(25A~32A) temperature compensation curve Tripping time(s) Rated current(%) Rated current times Ambient temperature ( ) Fig K(40A~125A) operation characteristic curve Fig K(40A~125A) temperature compensation curve Tripping time(s) Rated current(%) Rated current times Ambient temperature ( ) > >> P-04

10 Fig K operation characteristic curve Fig K temperature compensation curve Tripping time(s) Rated current(%) Rated current times Ambient temperature ( ) Motor protection series motor protection breaker are applied to the return feeder solution of motor, which ensure the motor normal running together with AC contactor, thermal relay. breaker use the electromagnetic to rise the function of short circuit protection, electromagnetic has the features of accurate working current setting and easy adjustment. NC7 NR2 Conventional tripping current of over-load protection: Setting range:lr=( ) ln Convertional tripping current of short circuit protection: Setting range:li=( ) ln 4. Accessories Shunt release Us=70-110%ln,circuit breaker reliably operates,long-time electrification is prohibited. Rated control supply voltage Us V: DC 24V,AC 230V,AC 400V Working voltage V: ( )Us Shunt release Wiring diagram C1 C2 Undervoltage release Us=35-70%Un, circuit breaker reliably breaks Us 85%Un,circuit breaker reliably closes Us<35%Un,prevent circuit breaker from making Note: with under-voltage release, Us 85%Un, circuit breaker normally makes and breaks Under-voltage release Wiring diagram D1 <U D2 P-05 > >>

11 Auxiliary contact Function: indication of contacting status Wiring diagram Circuit breaker is at breaking statis F12 F14 F11 F11 QF F14 Power supply Circuit breaker is at making status F12 F14 F11 F12 Alarm contact Function: indication of reason for circuit breaker releasing; Over-load Short-circuit Grounding fault Wiring diagram Circuit breaker is at breaking or making status F12 F14 B11 B11 QF B14 Power supply Circuit breaker is at free release(or alaming)status F12 F14 B11 B12 Operation of under-voltage releasing or free tripping When circuit breaker normally makes and breaks, alarm contact operates and after the circuit breaker again normally operates, alarm contact recovers original status. Table 1 Auxiliary circuit parameters Type Auxliary contact Alarm contact Rated insulation voltage V Specified heat current A Rated voltage V Rated frequency Hz Rated current A Rated voltage V Rated current A Inm 250A AC-15 DC-13 Motor driven operation mechanism Items Structure form Code of AC/DC voltage Model -125 K,-250 K Motor A1/D1, A2/D2, A4 Note: A1 AC 110V, A2 AC 230V, A4 AC 400V, D1 DC 110V, D2 DC 220V > >> P-06

12 Making and breaking diagram of motor-driven operation mechanism(ac/dc) Uc (+) ( -) P1 P2 Switch power + - DC24V S1 J ON ON S2 S4 J M Rotary manual operation mechanism Making/breaking wiring diagram of manual operation mechanism Circuit breaker H Y 20 X D 24 MIN=50mm Mounting dimensions of manual operation mechanism φ61 53 φ36 45 chain 2 φ Boring diagram of handle mounting 5.Overall and dimension Table 2 Outline dimension and installation dimension Type Wmax 3P 4P L max H max Outline dimension W1 H1 max H2 L2 A Installation dimension B φd -125EK -125NK -125FK ± ± EK -250NK -250FK ± ± P-07 > >>

13 K-250 arci solatingplate installinghole H2 H A L2 B L C Xφd H1 W1 W W1 6.specification selection and order MCCB type N K / frame size Breaking capacity E:18kA N:25kA F:36kA Adjustable K:Adujustable 4 Poles 3:3 poles 4:4 poles 308 Refer to table A Accessories Applications Rated current Default: distribution protection 2:Motor protection 125: 25A,32A,40A, 50A,63A,80A, 100A,125A 250: 125A,160A,180A, 200A,225A,250A A Types of quadrupole circuit breaker A:N pole with no over-current release component, N pole always on B:N pole with no over-current release component, N pole closes and opens together with the other three poles.(n pole closes first and opens last) C:N pole with over-current release component, N pole closes and opens together with the other three poles.(n pole closes first and opens last) Table 3 Rlease mode and Accessories code Accessory designation No accessory Alam contact Shunt release Auxiliary contact Under-voltage release Shunt release,auxiliary contact Shunt release,under-voltage release Two sets of auxiliary contact Auxiliary contact,under-voltage release Shunt release,alarm contact Auxiliary contact, alarm contact Under-voltage release, alar, contact Shunt release, auxiliary contact, alarm contact Two sets of auxiliary contact, alarm contact Auxiliary contact, under-voltage release,alarm contact Release code Type demonstration You can order the according to the following way: For example: Ordering an MCCB, frame grade current is 125A,25kA breaking capacity, adjustable, 4 poles, with alarm contact, for distribution protection and the working current is 100A. The description is -125Nk > >> P-08

14 ZHEJIANG CHINT ELECTRICS CO.,LTD. Add: No. 1, CHINT Road, CHINT Industrial Zone, North Baixiang, Yueqing, Zhejiang, , P.R.China Tel: Fax: Website: CHINT Electric All Rights Reserved Recycle Paper Printed Nov Specifications and technical data are subject to change without notice. Please contact us to confirm relevant information on ordering

NDM3 Series. Molded Case Circuit Breaker. Shanghai Liangxin Electrical CO., LTD.

NDM3 Series. Molded Case Circuit Breaker. Shanghai Liangxin Electrical CO., LTD. Shanghai Liangxin Electrical CO., LTD. - Liangxin Electrical - All rights reserved Address: No. 66 eng An Road, Pu Dong New District, Shanghai Post code: 07 Tel: 6--479 Fax: 6--5675966 E-mail: client@sh-liangxin.com