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MNC-S low-voltage withdrawable switch cabinet

Classification:


Electrical products with voltage levels ranging from 3.6kV to 550kV, used for power generation, transmission, distribution, energy conversion, and consumption in the power system to provide on/off, control, or protection functions


Product Details


Overview
MNC-S low-voltage withdrawable switchgear (hereinafter referred to as the device) is a product manufactured with standard modules after reference to MNS series low-voltage switchgear of ABB Company in Switzerland and comprehensive improvement. This device is suitable for AC 50Hz, rated working voltage 660V and below the system. As a variety of power generation, transmission, distribution, power conversion and power consumption equipment control equipment, can be widely used in various industrial and mining enterprises, buildings, hotels, municipal construction and other low-voltage power distribution system. In addition to general land use, after special treatment, it can also be used in offshore oil drilling platforms and nuclear power plants.
This device complies with international standard I EC439-I, national standard GB7251.1-97.
 
Features
Compact design: a smaller space can accommodate more functional units.
Strong structure versatility and flexible assembly: The C- shaped profile with 25mm modulus can meet the requirements of various structural types, protection levels and use environments.
Standard module design: can be composed of protection, operation, conversion, control, regulation, measurement, indication and other standard units. Users can choose and assemble according to their needs, so that 200 kinds of parts can form different cabinet frame structures and drawer units.
Good safety: a large number of high-strength flame retardant engineering plastic components, effectively strengthen the protection and safety performance.
High technical performance: the main parameters reached the domestic advanced level.
 
Normal use environmental conditions
The ambient air temperature is not higher than 40 ℃, not lower than 5 ℃, and the average temperature within 24 hours is not higher than 35 ℃.
Atmospheric conditions: the air is clean, the relative humidity does not exceed 50% at the highest temperature of 40 ℃, and higher relative humidity is allowed at lower temperatures, such as 90% at 20 ℃, but temperature changes should be considered, and moderate condensation may occur occasionally.
The altitude does not exceed 2000m.
The device is suitable for transportation and storage at the following temperatures: a range of 25°C to 55°C, up to 70°C in a short period of time (no more than 24h), and the device should not be subjected to any unrecoverable damage at these extreme temperatures, and should work normally under normal conditions.
If the above conditions of use cannot be met, the user and the manufacturer shall negotiate.
When the device is used in offshore oil drilling and production platform and nuclear power plant, another technical agreement shall be signed.

The switch cabinet has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection, etc. Mainly suitable for power plants, substations, petrochemical, metallurgical steel rolling, light industry and textile, factories and mining enterprises and residential areas, high-rise buildings and other different places. It mainly includes high-voltage isolating switch and grounding switch, high-voltage load switch, high-voltage automatic coincidence and segmenter, high-voltage operating mechanism, high-voltage explosion-proof distribution device and high-voltage switch cabinet.

Correct Selection of Breaker Breaking Capacity
On the primary system diagram, the selected circuit breaker, indicating the circuit breaker model, rated working voltage and rated working current, must also be selected for the breaking capacity of the circuit breaker. With user drawings, the breaking capacity of the circuit breaker is not selected, which makes it difficult for the manufacturer to carry out engineering design. The breaking capacity selection should be based on the system short-circuit parameters. If the manufacturer does not understand the system short-circuit parameters, it is difficult to make the correct choice. There are also some user drawings, regardless of the system short-circuit parameters, blindly select high-break parameters, resulting in unnecessary waste of funds. The correct choice of breaking capacity is very important, not only to ensure safe operation, but also to consider reducing product costs.


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