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[China]
Address: D5-4 Workshop 389 3rd Section, East third Ring Road, Industrial Development Zone ,Pengzhou City, Sichuan Province
Contact name:admin
Sichuan Baikong Electric Technology Co., Ltd. |
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50/60Hz 125A 1600A Moulded Case Circuit Breaker MCCB Low Voltage Circuit Breaker
1. General
NM8N series moulded case circuit breaker is suitable for the
circuit of AC50/60Hz, with rated voltage AC690V and below, DC
system rated voltage DC1000V and below, and rated current of 16A
and 1600A. It can protect circuits and electric equipment against
overload, short circuit or undervoltage, and can also provide
protection of overload, short circuit and under voltage for
infrequent start of motor. Products have functions of power
distribution protection, motor protection, residual current
protection and isolation. The circuit breaker can be installed
vertically, installed horizontally and can also enter the line from
the bottom.
Standards compliant:
IEC 60947-1 general rules for low-voltage switchgear and control
equipment;
IEC 60947-2 low-voltage switchgear and control equipment circuit
breakers;
IEC 60947-3 low-voltage switchgear and control equipment switches,
disconnectors and fuse combination appliances;
IEC 60947-4-1 Electromechanical contactors and motor starters
(including motor protectors) for low voltage switchgear and control
equipment.
2. Main Technical Data
| NM8N DC Moulded Case Circuit Breaker | 125 | 250 | ||||||||||
| Rated operating current In (A), 40 °C | 16-20-25-32-40-50-63-80-100-125 | 125-160-180-200-225-250 | ||||||||||
| Electric characteristics | ||||||||||||
| Rated insulation voltage Ui (V) | 1000 | 1000 | ||||||||||
| Rated impulse withstand voltage Uimp (kV) | 8 | 8 | ||||||||||
| Rated operational voltageUe(V),DC | 250 , | 500 , 750 , | 1000 | 250 , | 500 , 750, | 1000 | ||||||
| Rated ultimate short-circuit | DC250V | IP | 25 | 36 | 50 | — | — | 25 | 36 | 50 | — | — |
| DC500V | 2P in series | 25 | 36 | 50 | 70 | 100 | 25 | 36 | 50 | 70 | 100 | |
| breaking capacity Icu(kA) | DC750V | 3P in series | 25 | 36 | 50 | 70 | 100 | 25 | 36 | 50 | 70 | 100 |
| DC1000V 4P in series | 25 | 36 | 50 | 70 | 100 | 25 | 36 | 50 | 70 | 100 | ||
| DC250V | IP | 25 | 36 | 50 | — | — | 25 | 36 | 50 | — | — | |
| Rated service breaking capacity Ics(kA) | DC500V | 2P in series | 25 | 36 | 50 | 70 | 100 | 25 | 36 | 50 | 70 | 100 |
| DC750V | 3P in series | 25 | 36 | 50 | 70 | 100 | 25 | 36 | 50 | 70 | 100 | |
| DC1000V 4P in series | 25 | 36 | 50 | 70 | 100 | 25 | 36 | 50 | 70 | 100 | ||
3 .Operating conditions
3.1 Temperature:
Operating and storage temperature is -40° C~+70° C; the average
value within 24 hours does not exceed +35° C; when the ambient
temperature is -40° C~+70° C, users need to consider derating or
temperature compensation whose details can be referred to in Page
3.2 Altitude: ≤ 2000m;
3.3 Pollution grade: Grade 3;
3.4 IP grade: IP40
3.5 Air conditions:
At mounting site, relative humidity not exceed 50% at the max
temperature of +40 ℃ , higher relative humidity is allowable under
lower temperature. For example, RH could be 90% at +20 ℃ , special
measures should be taken to occurrence of dews.
Baikong electric was born and developed wellSichuan Baikong Electrical Technology Co., Ltd is a complete set of high and low voltage power distribution equipment automation equipment, set production, research and development and sales Import and export services and other integrated enterprises, the company is headquartered in Pengzhou Industrial Park, Chengdu City.The company's main products are box-type substation Medium and high voltage power transmission and distribution equipment, low voltage power distribution equipment, fire electrical equipment, intelligent industrial electrical equipment, new energy and energy storage electrical equipment, metering and protection power distribution equipment, high and low voltage complete switchgear, high voltage ring network cabinet, cable branch box,SF6 inflatable cabinet, etc.
