Low-Voltage Withdrawable Switchgear

MNS type low-voltage withdrawable switchgear is a new generation of low-voltage switchgear developed according to market demand. The technical standards of this product meet the requirements of IEC439 "low-voltage switchgear and control equipment" and GB7251 "low-voltage switchgear".

MNS type low-voltage withdrawable switchgear is suitable for power plants, substations, petrochemical industry, metallurgical steel rolling, light industry and textile factories and mines, residential quarters, high-rise buildings and other places, as the power conversion, distribution and control of power distribution equipment of power systems with AC 50~60Hz and rated working voltage AC 660V and below.
2. Environmental conditions: 1. The ambient air temperature is not higher than +40°C°C, not lower than -5°C, and its average temperature is not higher than 35°C within 24h.

2. Atmospheric conditions: clean air, relative humidity does not exceed 50% at the maximum temperature +40°C; Higher relative humidity is allowed at lower temperatures, eg

90% at 20°C, but it should be taken into account that moderate condensation may occur occasionally due to temperature changes.

3. The altitude does not exceed 2000 meters.

4. The unit is adapted to the transport and storage process at the following temperatures: between 25°C and 55°C, and up to +70°C in a short time (no more than 24h).

The unit should not suffer any irreparable damage at these extreme temperatures and should function normally under normal conditions.

5. If the above conditions of use cannot be met, the user and the manufacturer shall negotiate and resolve the issue.

6. When this device uses offshore oil drilling platforms and nuclear power plants, a separate technical agreement shall be signed.
Three: technical parameters

1. Rated working voltage (V): 380, 660;

2. Rated insulation voltage (V): 660;

3. Rated working current (A): horizontal bus 630~5000A

垂直母线 800~2000A

4. Rated short-time withstand current RMS (1 second) / peak (KA)

水平母线 50~100/105~250

垂直母线 60/130~150

5. Enclosure protection level: IP3X, IP4X
 four: Main features:
The basic cabinet frame of this device is a combined assembly structure, all the structural parts of the cabinet frame are galvanized, and are connected to each other into a basic cabinet frame by self-tapping locking screws or 8.8 hexagonal screws, and then according to the needs of the scheme changes, plus the corresponding doors, sealing plates, partitions, mounting brackets, busbars, functional units and other parts and components, assembled into a complete device, The size of the parts and compartments in the device is modularized (modulus unit E=25mm). Power Distribution Center (hereinafter referred to as PC).

(1) The PC cabinet is divided into four compartments: the horizontal bus compartment: at the rear of the cabinet; Functional unit compartment: in the upper part of the front of the cabinet or to the left of the front of the cabinet; cable compartments; In the lower part of the front of the cabinet or to the right of the front of the cabinet: the control loop compartment: in the upper part of the front of the cabinet

(2) The frame circuit breaker installed in the cabinet can be manually operated outside the cabinet when the door is closed; If you want to inspect the opening and closing status of the circuit breaker, you can judge whether the circuit breaker is in the test position or the working position according to the position relationship between the operating mechanism and the door.

(3) Design the component structure between the main circuit and the auxiliary circuit. The auxiliary circuit unit composed of the instrument, signal light and button is installed on a plastic board, and there is a cover made of flame-retardant polyurethane plastic behind the board that is separated from the main circuit.

Withdrawable motor control center and low-current power distribution center (hereinafter referred to as withdrawable MCC)

The extractable MCC cabinet is divided into three compartments, namely: the horizontal bus compartment at the rear of the cabinet; functional unit compartment to the left of the front of the cabinet; cable compartment to the right of the front of the cabinet,