Wholesale MCX01 Series Autotransformer Step-Down Starting Cabinet Supplier, Companies

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Wholesale MCX01 Series Autotransformer Step-Down Starting Cabinet Supplier, Companies

This product features a cabinet-type structure, composed of components including an autotransformer (with a thermal protector), AC contactors, integrated protectors, and time relays. Models with a power rating of 75kW and below adopt an automatic control mode, while models of 90kW and above support both manual and automatic control modes, which can be switched via a changeover switch. The time relay is adjustable, allowing users to freely set the starting time. Ammeters and voltmeters are installed on the cabinet door to directly display the operating status of the starter cabinet, making operation more intuitive and convenient for users.

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Product Description

Type & Meaning

1	Enterprise identification code
2	Starter cabinet
3	Autotransformer
4	Design serial number
5	Rated power of the controlled motor (kW)

Application Description

The MCX01 series autotransformer reduced-voltage starter cabinet is designed for use with three-phase squirrel-cage induction motors with rated power ranging from 15kW to 315kW, operating at AC 50Hz/380V. It is intended for non-frequent autotransformer reduced-voltage starting applications. By leveraging the voltage-reducing characteristics of the autotransformer, the starter effectively limits the motor's inrush starting current, thereby significantly mitigating the impact of the motor starting process on the power distribution network and protecting both the motor and the grid from adverse effects caused by excessive starting currents.

Product Display

MCX01 Reduced Voltage Starter Cabinet back

MCX01 Reduced Voltage Starter Cabinet front

Operating and Service Conditions

Ambient Temperature: The minimum ambient temperature must be greater than -5°C, while the maximum ambient temperature should not exceed +40°C. Additionally, the average daily temperature must remain below +35°C to prevent overheating or performance degradation.

Altitude: The equipment is intended for use at altitudes not exceeding 2000 meters above sea level, as higher elevations can affect cooling efficiency and electrical insulation properties.

Humidity: The average monthly relative humidity must not exceed 90%, measured at an average ambient temperature of 20°C. This prevents condensation and moisture-related damage to internal components.

Technical Parameters

Specifications	Controlled Motor Power (kW)	Maximum Operating Current (A)	Inductive Current Ratio (K)	Full Protection Environmental Current (A)	Total Maximum Starting Time (s)
MCX01-15	15	29	100/5	29	60
MCX01-18.5	18.5	36	100/5	36
MCX01-22	22	42	100/5	42
MCX01-30	30	57	100/5	57
MCX01-40	40	80	200/5	80
MCX01-55	55	103	200/5	103
MCX01-75	75	140	200/5	140
MCX01-90	90	167	300/5	2.8	80
MCX01-115	110	207	300/5	3.5
MCX01-135	132	248	400/5	3.1
MCX01-160	160	300	400/5	3.8
MCX01-190	190	367	600/5	3.1	100
MCX01-225	220	404	600/5	3.4
MCX01-260	250	459	600/5	3.8
MCX01-280	280	514	800/5	3.2
MCX01-315	315	579	800/5	3.6

Outline and Installation Dimensions

Specifications	Overall Dimensions (mm)	Installation Dimensions (mm)
MCX01-15-30	400×700×300	365×115
MCX01-40-75	500×1005×320	470×120
MCX01-90-115	550×1110×430	490×250
MCX01-135-190	600×1300×490	520×320
MCX01-220-315	700×1700×580	640×410

Frequently Asked Questions (FAQ)

What is the primary function of the MCX01 starter cabinet?

The MCX01 is designed for three-phase squirrel-cage induction motors to reduce the starting voltage via an autotransformer, lowering inrush current and preventing voltage drops and grid disturbance.

What motor power ratings are compatible with the MCX01 series?

The series covers controlled motor capacities ranging from 15kW up to 315kW, operating under standard 3-phase AC 50Hz/380V supply.

What is the allowable operating temperature range?

The ambient operating temperature should be maintained between -5°C and +40°C, with the daily average remaining below +35°C to avoid overheating.

What is the maximum starting duration for these cabinets?

The allowable total maximum starting time varies by model capacity: up to 60 seconds for 15–75kW, 80 seconds for 90–160kW, and up to 100 seconds for 190–315kW models.

Can this equipment be installed at high-altitude locations?

Yes, the standard equipment is rated for operation at altitudes up to 2000 meters above sea level without degrading electrical performance and cooling.

Wholesale MCX01 Series Autotransformer Step-Down Starting Cabinet Supplier, Companies

Product Description

Type & Meaning

Application Description

Product Display

Operating and Service Conditions

Technical Parameters

Outline and Installation Dimensions

Frequently Asked Questions (FAQ)

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