Chint NM8N-250S EN 250 3P Circuit Breaker Enclosure Protection

Chint NM8N Automatic Transfer Switch Protection is a powerful electrical protection device that is suitable for a wide range of electrical applications.

Basic information about the product

Model: NM8N-250S EN 250 3P
Order number: 71000530004926
Polar number: 3P (tripolar)
Frame electric current: 250A
Rated current: 250A
Separation capacity: 50 kA (the maximum current value at which the automatic transfer switch can quickly disconnect the circuit during a short circuit)
Connector type: electronic (provides greater accuracy and flexibility)
Operating mode: Manual (supports manual control to turn on)

Terms of Use

Temperature:
Operating temperature and storage temperature: - 40°C + 70°C. However, it should be noted that for the basic type electronic automatic switches (code set), the operating temperature is - 35°C + 70°C; The standard (liquid crystal) electronic automatic switch is 25°C + 70°C. The average temperature over 24 hours does not exceed + 35°C. In the range of - 40°C + 70°C, the user should consider the capacity reduction or temperature compensation.
At a maximum temperature of + 40°C, the relative air humidity does not exceed 50%; At lower temperatures, higher relative humidity is allowed (for example, up to 90% at + 20°C).
Measures must be taken to combat hardening caused by temperature changes.
Altitude above sea level: no more than 2000m. If exceeded, adjustment is required in accordance with the altitude correction factor.
Pollution class: 3 class

Installation conditions

They must be installed in places free from vibrations, impacts and shocks.
The installation surface and the vertical surface are inclined no more than + 5°.

Scope of application

Suitable for AC 50/60Hz, rated voltage AC690V and below and rated voltage DC1000V and below in DC systems.
It can be used to switch, divide and transfer rated current, and provide reliable protection against overload, short circuit and low pressure.
It can be used as protection against infrequent starting and engine overload, short circuit and low pressure.
Support vertical installation (vertical installation), horizontal installation (horizontal installation) and downward mode.

Other characteristics

Working separation capability: Ics=100% Icu, which means the short-term current tolerance of the automatic transfer switch (Icu) is equal to its working separation capability (Ics), indicating its high separation capability.
Nominal insulation voltage: 1000 V

Chint NM8N series automatic transfer switches play an important role in power systems with their high performance, reliability and wide range of applications.