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Meralco’s 34.5 kV radial system is a wye-grounded

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The wye-grounded system

The word “ground” is commonly used to cover both The word “ground” is commonly used to cover both “system ground” and “equipment ground”“system ground” and “equipment ground”

A system ground is a connection to ground from one of the A system ground is a connection to ground from one of the current carrying conductors of the distribution system.current carrying conductors of the distribution system.

It represents an electrical path, normally designed to carry It represents an electrical path, normally designed to carry fault current when a insulation breakdown occurs within an fault current when a insulation breakdown occurs within an electrical system.electrical system.

Electrical Electrical GroundingGrounding

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Hazards of Hazards of deficiency in deficiency in

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Always use standard grounding clusters.Always use standard grounding clusters.

Use rubber gloves and hot line stick (grip-all) Use rubber gloves and hot line stick (grip-all) when installing grounding clusters.when installing grounding clusters.

Always follow standard procedures in installing Always follow standard procedures in installing grounding clusters.grounding clusters.

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Pole ground for concrete and wood poles is defined Pole ground for concrete and wood poles is defined as a ground conductor that extends from the overhead static as a ground conductor that extends from the overhead static wire (if present) and/or the system neutral to the ground coil wire (if present) and/or the system neutral to the ground coil electrode or ground rod normally situated near the pole butt. electrode or ground rod normally situated near the pole butt. This is essential to provide a common ground for all the pole This is essential to provide a common ground for all the pole components that are required to be grounded.components that are required to be grounded.

For steel poles, it is the connection of the pole to the For steel poles, it is the connection of the pole to the ground through the anchor bolts bonded to the copper ground through the anchor bolts bonded to the copper ground wire coiled at the bottom of the concrete foundation.ground wire coiled at the bottom of the concrete foundation.

Pole Pole GroundingGrounding