- #Building electrical installation tutorial how to
- #Building electrical installation tutorial generator
industries, high torque motors, multi-story & large buildings (industrial as commercial), Three Phase power supply needed to operate and maintain the high power and voltage systems. In ordinary homes (domestic as residential), we mostly use Single Phase power supply to operate lighting load, fans, washing machines etc. we need Three Phase Power supply instead of Single Phase Power supply. To operate high power equipment and appliances such as electric motors, high power rated air compressors & air-conditions, water heaters etc. In the US, The 240V Single phase load can be connected to two phases without a Neutral wire. In Three Phase Supply, motors and large electric heaters can be directly connected to the three Phases (Neutral is not needed in all cases) while in Single Phase, load circuits (light, fan etc.) can be connected in between Phase and Neutral through proper protective devices e.g. In the Star connection, Three Phase Line to Line (Phase to Phase) voltages are 400V AC (in US, 208V, 240V, 480V etc) and Single Phase Line to Neutral (Phase to Neutral), there are 230V AC (120V, 208V, 240V, 277V, 480V etc in the US).
This way, they get a three phase Star connection (3-Phase, 4 Wire System with Neutral Wire). On the other hand, buildings that need low as well as high power in three phase and single phase are connected to the secondary of the distribution transformer.
#Building electrical installation tutorial how to
How to Wire a Three Phase, 400V Distribution Board? IEC & UKĪs high power is needed in industrial and commercial buildings, they are connected to the three phase Delta connection (3 Phase – 3 Wire System – No Neutral Wire) before distribution transformer and then manage the required voltage and current according to the system requirements in three phase and single phase supply.How to Wire Combo of 3 & 1-Φ, 400V/230V Distribution Board?.We will show the wiring diagram in the next sections of this post. For a three phase system, the arrangement can be different for different levels of voltage. In the US, 4.5k-7.2kV from the step-down transformer wired in Delta connection via 3 Phase, 3-Wires System enters the 240V/120V distribution transformer wired in Star Connection (Two Phase, 3 Wires System). In the UK and EU, 11kV from the step-down transformer wired in Delta connection via (3 Phase, 3-Wires System) enters the 400V/230V distribution transformer wired in Star “Y” Connection (Three Phase, 4 Wires System). RCD, MCB, MCCB, CB, RCD, RCBO, Fuses, Switchesetc are used as controlling and protective devices in the MDB, DB, Sun & Final Sub circuits. In the distribution system, they are again step-down the level of voltage via step-down transformer for further utilization. The voltage levels are step-up via step-up transformers for power transmission. Both single phase and three phase supply is further distributed by the three single phase transformers or a single unit of three phase transformer (configured in Star “Y” or Delta Connection) installed on the utility pole near the residential or commercial area. The generated power from alternators then transmitted and distributed through transmission and distribution lines to the sub distribution. In an alternator, the generated voltage and current by three independent coils in the stator are separated by 120 degrees from each other.
#Building electrical installation tutorial generator
In power generation plants, Three Phase power is generated by an electrical generator or alternator. What is Three Phase & Single Phase Power? Three Phase Wiring Color Codes – IEC and NEC.Schematic Wiring Diagram of Three Phase Distribution Board.How to Connect Three Phase, 400V Loads in a 3-Phase Wiring Distribution System? – IEC & UK.How to Connect Single Phase 120V Loads in a 1-Phase Wiring Distribution System? – NEC – US.