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Abstract Structure

LV Switchgear

Sub-Main Distribution Board

A Sub-Main distribution board (also referred as Sub-Main board) comprises of an incomer device, in the form of an MCCB or a Non-Auto MCCB or an Isolator, along with a number of outgoing circuit breakers. The SMDB is fed from a MDB & feeds power through its branches to the downstream panels.


Up to 800A at 690V, 50Hz

Short Circuit Rating

36kA and 50kA for 1sec

Type of Construction:

Form2 & Form4b construction, IP54 with up to 16 number of outgoing ways with provision of wall mounting or free standing

Operating Ambient Temperature:


Type Test Certification:

Type tested up to 800A rating, 50kA 1sec, for compliance to IEC 61439-1 & 2, Ed.3

Sub-Main Distribution Board.PNG
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