تابع اصدارات مذكرة المقابلات(حماية خطوط القوى)

حماية خطوط القوى

Type of protection	Remark	Note
1- Over current protection	Applied as main protection for distribution lines and buck-up for main lines where main protection is distance or other faster type.
2- Directional or non directional	Direction relays
3-Earth fault	By using current transformer
4- Pilot wire differential protection.	For important line (for short line)
Carrier current protection	Where lenth of transmission line is long

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