SML (SMCC)-type power distribution cabinet (Low-voltage switchgear) is applied to three-phase AC 50Hz rated voltage 660V and below the low-voltage distribution system, with power distribution and control, protection and other functions, subject to the following standards: GB 7251.1 - 1997 "Low-voltage switchgear and control equipment", IEC 439-1: 1992 "Low-voltage switchgear and control equipment" JB / T 9661-1999 "out-type low-voltage switchgear equipment"
■ characteristics of the product structure
□ SML (SMCC)-type distribution counter, or the use of angle steel welded together in two ways, Shelves and Shell have sufficient mechanical strength and rigidity, the installation can withstand short-circuit components and mechanical when produced by stress and thermal stress, to ensure that the hoisting equipment transport does not affect performance.
□ electrostatic powder coating products to ensure that the anti-corrosive.
□ products have vents open to ensure good heat dissipation.
□ In order to prevent touching the live objects such as bus, complete sets of equipment used in partitions (metal baffles or insulation partition) to isolate, in which electric cabinets and counters in the feed can also be isolated within the doors, when the operator does not touched on the dangers of busbar.
□ cabinets placed in the three-phase bus bar of the upper cabinets, cable round win at the rear room, which set the bus to avoid large enough to cause the magnetic eddy current loss pathway.
□ wire bus and the color and order are in line with GB / T 2681 requirements.
□ out of the unit there are three distinct locations: the joint, test location, separate locations, separate the main circuit when the location of connectors and vertical exposed live parts or static contact bus isolation distance not less than 20mm.
□ out of the first unit and second connectors are used (current of up to one connector 630A) rated current value of the feed in small units and all the control unit can be drawn into modules to facilitate the testing and maintenance.

Main technical parameters
Rated operating voltage:
a. Main circuit AC220V, AC380V
b. Auxiliary circuit AC110V, AC220, AC380, DC24V, DC110V, DC220V
Rated Current:
Home row level of rated current 6300A, 5000A, 4000A, 3150A, 2500A, 2000A, 1600A, 1250A, 1000A, 800A, 630A,
Rated current row of vertical mother 3150A, 2500A, 2000A, 1600A, 1250A, 1000A, 800A, 630A, 400A
Busbar rated the level of intensity for short-circuit resistance: 80kA/176kA
Rated short-circuit tolerance of vertical line strength: 50kA/105kA
The main switch breaking capacity: 80kA, 65kA, 50kA
Single-loop feed counter: 1 ~ 9
Control cabinet separate circuit: 2 ~ 9
Feed counter and control the protection switch cabinet breaking capacity: 50kA, 35kA, 25kA, 10kA
Shell protection grade: IP30
SML (SMCC) is usually selected the following dimensions:
High (H): 2350,2200,2000,1800
Width (W): 1200,1000,800,600;
Deep (D): 1500,1200,1000,800,600
Dimensions cabinets throughout the system based mainly on the main switch rated current and MCC control unit to select the level of complexity.
□ 6300A used by the electrical cabinet of the ACB (Air circuit breaker), the standard specifications for home row 10t * 120 * 4 / phase, a width of 1200 cabinets.
□ cabinets feed unit width of 1000 or 800.
□ control unit cabinets 1000,800 or 600 width.
□ high generally 2200, 2350 can also be used to increase the cable alignment space, user-friendly construction. The purpose of the use of 2000,1800 at the scene to deal with customers by building height limit or the entire system when very few units.
□ depth of the general 1200, 1500 can also be used to increase the cable alignment space, user-friendly construction. The purpose of the use of 1000,800,600 to deal with customers at the scene by the construction depth restrictions.
□ neutral busbar cross-section according to the main bus is greater than or equal to 1 / 2 to select.
□ grounding busbar cross-section of the main bus is greater than or equal to 1 / 4, the main bus ≥ 800 mm2 cross-section, select 200mm2.
□ SML (SMCC) has developed a total of 86 standard
According to the program object has the following:
By electricity, contact, feed, direct start, reversible activated stars Triangle to start, start decompression, reactive compensation, shunt unit.
□ drawer unit features a high specification are: 200,300,400,600,800,900,1200,1400,1800, each a maximum of 9 units.
□ special structure Description:
The use of steel cabinets assembled manner, the use of bolts to connect with modulus, then the structure can be formed in a separate high-out-type modules 200,300,400,600, and high 800,900,1200,1400,1600,1800 fixed unit. Out of a connector-type modules maximum current up to 630A, feed and control unit can be produced out of style.