Where is the surge arrester best installed?

As most surge protectors are installed in parallel to the power panels, normally the best place to install the device is on the main service or panel feeding the facility.

Is standard for surge arrester?

IEEE Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1KV) Superseded by IEEE Std C62. 11-2005. Metal-oxide surge arresters designed to repeatedly limit the voltage surges on 48u201362 Hz power circuits (>1 kV) are covered in this standard.

What is difference between surge arrester and lighting arrestor?

Surge arrester is used to protect the circuit or electrical equipment from high voltage transient or electrical surges. Lightning arrester works like surge arrester from outside of the conductor. They absorb the electrical surges in the transmission tower itself. Lightning rod is a pre protection device.

What is Type 1 surge protection?

OVR type 1 and type 1+2 are designed to discharge high current surges without any destruction of the installation. This surge protective device is chararcterized by its capacity to withstand impulse current with 10/350 µs wave form which simulate direct impact coming from a natural lightning current.

What is a MWK surge arrester used for?

ABB MWK surge arresters are used for the short-circuit protection of medium voltage and high voltage electrical equipment and cables against overvoltages caused by lightning, atmospheric discharges and switching conditions up to 52kV. MWK surge arrester is suitable for both indoor and outdoor use – type ABB MWD is intended for use indoors only.

What is the IEEE standard for surge arrestors?

ANSI/IEEE C62.11 IEEE Standard – Metal-Oxide Surge Arresters AC Power Circuits (>1 kV)

What is the operating voltage of a 9 kV arrester?

For a solidly grounded system, the continuous operating voltage is 13,800 divided by the square root of 3, or 7970 V. This is above the MCOV of 7,650 V for an arrester rated 9 kV.

What size arrester do I need for my electrical system?

For an ungrounded 13.8 kV system, the 12.7 kV MCOV of a 15 kV arrester is not adequate. It is necessary to use an 18 kV arrester with an MCOV of 15.3 kV. Finally, for a resistance-grounded 13.8 kV system, the choice will be between arresters rated 12 kV, 15 kV and 18 kV, depending on the time needed to relay ground faults off the system.