Sub Main Distribution Boards (SMDB)
Sub-Main Distribution Board (SMDB):
Enersys-S Power Distribution Boards from L&T meet the demands of commercial buildings, educational establishments, hospitals, government buildings, manufacturing facilities and other applications that require safe, reliable and high-performance protection of their electrical sub-distribution systems.
Enersys-S is a tested Sub-Main Distribution Board (SMDB) (also known as MCCB panel board) used for power distribution. It has MCCBs as incoming and outgoing switching-cum-protection devices.
Enersys-S SMDB complies with IEC61439-2 and has been designed for easy handling and quick, simple installation. Compact MCCB design ensures maximum cabling area within the enclosures. Removable top and bottom gland plates are provided for ease of installation and cabling. Removable gland plates allow fitting of additional items such as bottom cabling boxes and metering extension boxes.
Safety:
Enersys-S Power Distribution Boards from L&T meet the demands of commercial buildings, educational establishments, hospitals, governtment buildings, manufacturing facilities and other application where safety, reliability, high performance and protection of system and human is main concern.
Moulded busbar housing
The busbar assembly is fully enclosed behind the moulded busbar housing, providing increased safety. A shroud at the incoming side prevents accidental contact with live parts.
Protection from risk of shock
Separate earthing for enclosure ensures operator safety.
IP 20 protection
The unique construction of the enclosure offers IP 20 protection even after opening the door. This prevents accidental contact with the live parts.
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Technical Details |
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Attributes |
Specifications |
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Busbar ratings (In) ( A) |
250, 400, 630 |
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Rated operational voltage (Ue) (Vac) |
415 |
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Rated frequency (fn) (Hz.) (HZ) |
50/60 |
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Reference temperature (°C) |
50 |
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Rated insulated voltage (Ui) (Vac) |
830 |
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Rated impulse voltage (Uimp) (kV) |
8 |
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Busbar short circuit withstand strength (Icw) (kA) |
250A & 400A SMDB – 36 kA 1s, 20 kA 3s 400A & 630A SMDB – 50 kA 1s, 30kA 3s |
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Busbar conditional short circuit rating (Icc) (kA) |
36 |
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Neutral & earth bar rating |
N: 100% of Ph. E: 50% of Ph. |
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Busbar material |
Tinned Copper |
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Type of construction |
Form 2 |
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Type of connection |
3-phase 4-wire with Earthing |
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Incomer (IC) & Outgoing (OG) Device |
MCCB |
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Incomer MCCB Ratings (A) |
250A, 400A, 630A |
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Incomer breaking capacity (Icu) (kA) |
36 kA – 250A, 400A |
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36 kA – 630A |
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IC & OG feeder no. of poles |
3 |
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Outgoing feeder – No. of ways |
4, 8, 12 & 16 |
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Applicable standard |
IEC 61439-2 |
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Application |
Indoor |
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Ingress protection rating |
IP43 |
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Mounting |
Wall mounting – Up to 630A |
Always in Stock
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Sr |
Description |
Model |
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1 |
Enersys-S SMDB TN250D, 4 ways |
NA20D1044RZZ0 |
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2 |
Enersys-S SMDB TN250D, 8 ways |
NA20D1084RZZ0 |
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3 |
Enersys-S SMDB TN250D, 12 ways |
NA20D1124RZZ0
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4 |
Enersys-S SMDB TN250D, 16 ways |
NA20D1164RZZ0 |
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5 |
Enersys-S SMDB TN400D, 4 ways |
NA40D1044RZZ0 |
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6 |
Enersys-S SMDB TN400D, 8 ways |
NA40D1084RZZ0
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7 |
Enersys-S SMDB TN400D, 12 ways |
NA40D1124RZZ0 |
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8 |
Enersys-S SMDB TN400D, 16 ways |
NA40D1164RZZ0 |
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9 |
SMDB 400A – 100A & 250A Combination
, (2+2) 4 ways |
NA4AD1044RZZ0 |
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10 |
SMDB 400A – 100A & 250A Combination ,(2+6) 8 ways |
NA4AD1084RZZ0 |
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11 |
SMDB 400A – 100A & 250A Combination
,(2+10)12 ways |
NA4AD1124RZZ0 |
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12 |
SMDB – TN630D, O/G 100A 8 ways |
NA60D1084RZZ0
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13 |
SMDB – TN630D, O/G 100A 12 ways |
NA60D1124RZZ0 |
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14 |
SMDB – TN630D, O/G 250A 4 ways |
NA62D1044RZZ0
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15 |
SMDB – TN630D, O/G 250A 8 ways |
NA62D1084RZZ0
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