NYKW2 Series

Intelligent Universal Circuit Breaker

Intelligent Efficient Safe Comprehensive

PRODUCT OVERVIEW

NYKW2 series intelligent universal circuit breakers are mainly used to distribute electric energy and protect lines and power supply equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. It adopts intelligent control unit with various protection modes to improve the reliability of power supply. It also has open communication interface for four remote control functions to meet the requirements of the control center and automation system.

NYKW2 series intelligent universal circuit breaker complies with GB14048.2 "Low-voltage Switchgear and Controgear—Circuit-breakers" and IEC60947-2 "Low-voltage Switchgear and Controlgear—Circuit-breakers" and other standards.

ZERO ARC

Adopts magnetic blowing arc extinguishing technology and multi-layer metal grating structure for arc extinguishing, and gratings are staggeredly arranged in "V" groove, which can effectively improve the arc voltage. Also, the side walls of the arc extinguishing chamber are made of gas-producing materials, which can increase the air pressure in the chamber and facilitate the arc into the arc extinguishing chamber to rapidly extinguish the arc, so that it becomes a zero-arc air circuit breaker.

HIGH BREAKING CAPACITY

Adopts dual structure of main and arc contacts, and the rated current is borne by the main contact, and the arc is borne by the arc contact, thus the burning damage caused by the arc to the main contact is very small.

Designed with new contact support, the electrodynamic repulsion force compensates for contact pressure, so that it has better dynamic and thermal stability. The gas-producing material wraps the movable and static contacts, and the high-pressure gas drives the arc to flow to the arc extinguishing chamber quickly, extending the service life of the contacts.
The main contact is comb-shaped and composed of a number of contacts in parallel to reduce the electrodynamic repulsion force and improve the heat dissipation effect, which is conducive to the improvement of product performance indicators (reliability, temperature rise, breaking capacity, etc.).

INTELLIGENCE

Relying on various sensor technologies, microelectronic technologies and various information transmission technologies, NYKW2 series intelligent circuit breakers integrate the functions of control, measurement and communication, which can better break and protect the circuit. It has a variety of protection functions suitable for different application scenarios in order to meet the requirements of control centers and automation systems, and realize the intelligent operation of circuit breakers.

ABUNDANT EXPANSION SPACE

Programmable relay signaling units, zone selective interlocking (ZSI), load monitoring, demand value measurement and other expansion units are available to meet the needs of different applications.

Technical Parameters

BASIC TECHNICAL PARAMETERS

Model Rated operating voltage Ue(V) Rated insulation voltage Ui(V) 50Hz Rated impulse withstand voltage Uimp(V) Casing current Inm(A) Rated currentIn(A) Number of poles Short-circuit breaking capacity Rated short-circuit making capacity Icm(kA) (peak) Rated short-time withstand current Icw(kA)/1s N-phase rated current In(A)
Rated ultimate short-circuit breaking capacity Icu(kA) Rated operating short-circuit breaking capacity Ics(kA)
AC400V AC690V AC400V AC690V AC
400V		 AC
690V		 AC
400V		 AC
690V
NYKW2-2000 AC400,690 AC1000 AC12000 2000 630 3,4 85 50 65 40 187 105 65 40 100%In
800 85 50 65 40 187 105 65 40
1000 85 50 65 40 187 105 65 40
1250 85 50 65 40 187 105 65 40
1600 85 50 65 40 187 105 65 40
2000 85 50 65 40 187 105 65 40
NYKW2-3200 3200 2000 100 65 65 50 220 143 65 50
2500 100 65 65 50 220 143 65 50
2900 100 65 65 50 220 143 65 50
3200 100 65 65 50 220 143 65 50
NYKW2-4000 4000 3600 120 85 100 80 264 187 100 80 50%In
4000 120 85 100 80 264 187 100 80
NYKW2-6300 6300 4000 120 80 100 65 264 165 100 65
5000 120 80 100 65 264 165 100 65
6300 120 80 100 65 264 165 100 65

NYKW2 Series Controller Catalog

Controller Model NT-2L NT-M NT-2M NT-3M NT-2H NT-3H
Display mode Electronic display Digital display Digital display LCD display Digital display LCD display
Overload long delay protection ● ● ● ● ● ●
Short-circuit short delay protection 〇 ● ● ● ● ●
Short-circuit instantaneous protection ● ● ● ● ● ●
Grounding fault protection 〇 ● ● ● ● ●
Current imbalance protection - - 〇 〇 〇 〇
Functional test ● ● ● ● ● ●
Fault memory ● ● ● ● ● ●
Signal contact output 〇 〇 〇 〇 〇 〇
Thermal memory ● ● ● ● ● ●
self-diagnosis ● ● ● ● ● ●
MCU operating indication ● - - - - -
Current columnar display ● - - - - -
Current measurement - ● ● ● ● ●
MCR and override tripping 〇 〇 〇 〇 〇 〇
Load monitoring - 〇 〇 〇 〇 〇
Fault status indication and value display ● ● ● ● ● ●
Voltage measurement - 〇 〇 〇 〇 〇
Power factor - - 〇 〇 〇 〇
Power measurement - - 〇 〇 〇 〇
Electrical energy measurement - - 〇 〇 〇 〇
Communication function - - - - ● ●
Contact wear indication function - - ● ● ● ●
Zone selective interlocking - - - 〇 - 〇
Harmonic measurement - - - 〇 - 〇
Voltage protection - - - 〇 - 〇
Memory of grid history parameters - - 〇 〇 〇 〇
Counting function - - ● ● ● ●

Description： ●   Standard function    〇  Optional function     -  Not supported

Selection table

NYKW2 2000 3P 630A Model M Drawer type horizontal wiring Additional functions
Product code Casing grade Pole No. Rated current Intelligent controller Installation method Additional functions
NYKW2：
Intelligent universal circuit
breaker		 2000A
3200A
4000A
6300A 		3P:3 pole
4P:4 pole		 630A
800A
1000A
1250A
1600A
2000A
2500A
2900A
3200A
3600A
4000A
5000A
6300A		 2L type
M type
2M type
3M type
2H type
3H type		 Fixed horizontal wiring
Drawer type horizontal wiring
Fixed vertical wiring
Drawer type vertical wiring		 Under-voltage tripper
No-voltage tripper
External current transformer (3P+N)
One lock and one key
Two locks and one key
Three locks and two keys
Steel cable type mechanical interlocking
Technical Parameters

Basic technical parameters

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：2000

    Rated currentIn(A)：630

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：85（AC400V）；50（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；40（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：187（AC400V）；105（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；40（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：2000

    Rated currentIn(A)：800

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：85（AC400V）；50（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；40（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：187（AC400V）；105（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；40（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：2000

    Rated currentIn(A)：1000

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：85（AC400V）；50（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；40（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：187（AC400V）；105（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；40（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：2000

    Rated currentIn(A)：1250

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：85（AC400V）；50（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；40（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：187（AC400V）；105（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；40（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：2000

    Rated currentIn(A)：1600

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：85（AC400V）；50（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；40（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：187（AC400V）；105（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；40（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：2000

    Rated currentIn(A)：2000

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：85（AC400V）；50（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；40（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：187（AC400V）；105（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；40（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：3200

    Rated currentIn(A)：2000

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：100（AC400V）；65（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；50（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：220（AC400V）；143（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；50（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：3200

    Rated currentIn(A)：2500

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：100（AC400V）；65（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；50（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：220（AC400V）；143（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；50（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：3200

    Rated currentIn(A)：2900

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：100（AC400V）；65（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；50（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：220（AC400V）；143（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；50（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：3200

    Rated currentIn(A)：3200

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：100（AC400V）；65（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：65（AC400V）；50（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：220（AC400V）；143（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：65（AC400V）；50（AC690V）

    N-phase rated current In(A)：100%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：4000

    Rated currentIn(A)：3600

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：120（AC400V）；85（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：100（AC400V）；80（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：264（AC400V）；187（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：100（AC400V）；80（AC690V）

    N-phase rated current In(A)：50%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：4000

    Rated currentIn(A)：4000

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：120（AC400V）；85（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：100（AC400V）；80（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：264（AC400V）；187（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：100（AC400V）；80（AC690V）

    N-phase rated current In(A)：50%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：6300

    Rated currentIn(A)：4000

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：120（AC400V）；80（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：100（AC400V）；65（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：264（AC400V）；165（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：100（AC400V）；65（AC690V）

    N-phase rated current In(A)：50%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：6300

    Rated currentIn(A)：5000

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：120（AC400V）；80（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：100（AC400V）；65（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：264（AC400V）；165（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：100（AC400V）；65（AC690V）

    N-phase rated current In(A)：50%In

  • Rated operating voltage Ue(V) ：AC400,690

    Rated insulation voltage Ui(V) 50Hz：AC1000

    Rated impulse withstand voltage Uimp(V)：AC12000

    Casing current Inm(A) ：6300

    Rated currentIn(A)：6300

    Number of poles ：3,4

    Rated ultimate short-circuit breaking capacity Icu(kA) ：120（AC400V）；80（AC690V）

    Rated operating short-circuit breaking capacity Ics(kA) ：100（AC400V）；65（AC690V）

    Rated short-circuit making capacity Icm(kA) (peak) ：264（AC400V）；165（AC690V）

    Rated short-time withstand current Icw(kA)/1s ：100（AC400V）；65（AC690V）

    N-phase rated current In(A)：50%In

NYKW2 Series Controller Catalog

  • Display mode：Electronic display

    Overload long delay protection：●

    Short-circuit short delay protection：〇

    Short-circuit instantaneous protection：●

    Grounding fault protection：〇

    Current imbalance protection：-

    Functional test：●

    Fault memory：●

    Signal contact output：〇

    Thermal memory：●

    self-diagnosis：●

    MCU operating indication：●

    Current columnar display：●

    Current measurement：-

    MCR and override tripping：〇

    Load monitoring：-

    Fault status indication and value display：●

    Voltage measurement：-

    Power factor ：-

    Power measurement：-

    Electrical energy measurement：-

    Electrical energy measurement：-

    Communication function：-

    Contact wear indication function：-

    Zone selective interlocking：-

    Harmonic measurement：-

    Voltage protection：-

    Memory of grid history parameters：-

    Counting function：-

  • Display mode：Digital display

    Overload long delay protection：●

    Short-circuit short delay protection：●

    Short-circuit instantaneous protection：●

    Grounding fault protection：●

    Current imbalance protection：-

    Functional test：●

    Fault memory：●

    Signal contact output：〇

    Thermal memory：●

    self-diagnosis：●

    MCU operating indication：-

    Current columnar display：-

    Current measurement：●

    MCR and override tripping：〇

    Load monitoring：〇

    Fault status indication and value display：●

    Voltage measurement：〇

    Power factor ：-

    Power measurement：-

    Electrical energy measurement：-

    Communication function：-

    Contact wear indication function：-

    Zone selective interlocking：-

    Harmonic measurement：-

    Voltage protection：-

    Memory of grid history parameters：-

    Counting function：-

  • Display mode：Digital display

    Overload long delay protection：●

    Short-circuit short delay protection：●

    Short-circuit instantaneous protection：●

    Grounding fault protection：●

    Current imbalance protection：〇

    Functional test：●

    Fault memory：●

    Signal contact output：〇

    Thermal memory：●

    self-diagnosis：●

    MCU operating indication：-

    Current columnar display：-

    Current measurement：●

    MCR and override tripping：〇

    Load monitoring：〇

    Fault status indication and value display：●

    Voltage measurement：〇

    Power factor ：〇

    Power measurement：〇

    Electrical energy measurement：〇

    Communication function：-

    Contact wear indication function：●

    Zone selective interlocking：-

    Harmonic measurement：-

    Voltage protection：-

    Memory of grid history parameters：〇

    Counting function：●

  • Display mode：LCD display

    Overload long delay protection：●

    Short-circuit short delay protection：●

    Short-circuit instantaneous protection：●

    Grounding fault protection：●

    Current imbalance protection：〇

    Functional test：●

    Fault memory：●

    Signal contact output：〇

    Thermal memory：●

    self-diagnosis：●

    MCU operating indication：-

    Current columnar display：-

    Current measurement：●

    MCR and override tripping：〇

    Load monitoring：〇

    Fault status indication and value display：●

    Voltage measurement：〇

    Power factor ：〇

    Power measurement：〇

    Electrical energy measurement：〇

    Communication function：-

    Contact wear indication function：●

    Zone selective interlocking：〇

    Harmonic measurement：〇

    Voltage protection：〇

    Memory of grid history parameters：〇

    Counting function：●

  • Display mode：Digital display

    Overload long delay protection：●

    Short-circuit short delay protection：●

    Short-circuit instantaneous protection：●

    Grounding fault protection：●

    Current imbalance protection：〇

    Functional test：●

    Fault memory：●

    Signal contact output：〇

    Thermal memory：●

    self-diagnosis：●

    MCU operating indication：-

    Current columnar display：-

    Current measurement：●

    MCR and override tripping：〇

    Load monitoring：〇

    Fault status indication and value display：●

    Voltage measurement：〇

    Power factor ：〇

    Power measurement：〇

    Electrical energy measurement：〇

    Communication function：●

    Contact wear indication function：●

    Zone selective interlocking：-

    Harmonic measurement：-

    Voltage protection：-

    Memory of grid history parameters：〇

    Counting function：●

  • Display mode：LCD display

    Overload long delay protection：●

    Short-circuit short delay protection：●

    Short-circuit instantaneous protection：●

    Grounding fault protection：●

    Current imbalance protection：〇

    Functional test：●

    Fault memory：●

    Signal contact output：〇

    Thermal memory：●

    self-diagnosis：●

    MCU operating indication：-

    Current columnar display：-

    Current measurement：●

    MCR and override tripping：〇

    Load monitoring：〇

    Fault status indication and value display：●

    Voltage measurement：〇

    Power factor ：〇

    Power measurement：〇

    Electrical energy measurement：〇

    Communication function：●

    Contact wear indication function：●

    Zone selective interlocking：〇

    Harmonic measurement：〇

    Voltage protection：〇

    Memory of grid history parameters：〇

    Counting function：●

Description： ●   Standard function    〇  Optional function     -  Not supported

Selection table


  • Product code ：NYKW2： Intelligent universal circuit breaker

    Casing grade：2000A/3200A/4000A/6300A

    Pole No.：3P:3 pole/4P:4 pole

    Rated current：630A/800A/1000A/1250A /1600A/2000A/2500A/2900A/3200A/3600A/4000A/5000A/6300A

    Intelligent controller：2L type/Model M/2Model M/3Model M/2H type /3H type

    Installation method：Fixed horizontal wiring/Drawer type horizontal wiring/Fixed vertical wiring/Drawer type vertical wiring

    Additional functions：Under-voltage tripper/No-voltage tripper/External current transformer (3P+N)/One lock and one key/Two locks and one key/Three locks and two keys/Steel cable type mechanical interlocking