Main and Submain Switchboard

Product Derscription

Main Switch Board (MSB) / Sub-Main Switchboard (SMSB)

Standard Compliance to

MEW Regulations R1
IEC 439 / BS 5486Panel Construction
BS 159Busbars Connections
IEC 947 – 2Circuit Breakers
BS 88/ IEC Fuses
BS 142/IECProtective Relays
BS 3938/IEC 185Current Transformers
IEC 51/BS 89 Metering and other relevant standards
1. Distribution System : 3Ph & N System 415/240V, 50HZ
2. Fault Level Rating : 15KA / 15KA / 35KA / 50KA
3. Busbars : Electrolytic Tinned copper with 99.9% purity.

Color-marked for Phase Identification

CapacityRYB & N upto 630A (800A & above available on request)
E: 50% of phase busbar
SupportsMoulded DMC fiber-glass Insulating supports with high resistance & Reduced flammability
Working Temp – 160˚C
Working Voltage – 660V

4. Enclosure:

ConstructionBox / Cubicle, Non Cellular, Totally Enclosed, Front Accessible.
MaterialSteel Sheet
TreatmentElectro Galvanized / Zinc Coated.
Gauge1.5mm / 2.0mm
PaintingPowder Coating matt Polyster, RAL 7032
IP ProtectionIP 52 Indoor Installation
IP 54 Outdoor Installations

5. Assembly:

Materials used are capable of withstanding the mechanical, electrical, and thermal
stresses as well as the effect of humidity which are likely encountered in normal

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