In an electrical power distribution system, a ring main unit (RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch that feed a distribution transformer. The metal enclosed unit connects to the transformer either through a bus throat of standardized dimensions, or else through cables and is usually installed outdoors. Ring main cables enter and leave the cabinet. This type of switchgear is used for medium-voltage power distribution, from 7200 volts to about 36000 volts.
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| - وحدة التغذية الحلقية (ar)
- Ring main unit (en)
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| - في أنظمة توزيع الطاقة الكهربائية، وحدة التغذية الحلقية (RMU (Ring Main Unit)) هي مجموعة مجمعة بالمصنع تتكون باختصار من مجموعة من المفاتيح الكهربائية المغلقة تستخدم لربط المحطات الفرعية ببعضها بطريقة الحلقة وداخل محطات الجهد المتوسط (11 كيلو فولت إلى 36 كيلو فولت) بغرض حماية المحولات الموصلة بها في حالة حدوث مشكلة بالشبكة أو فصل جزء من الشبكة (محول على سبيل المثال) في حالة الصيانة. (ar)
- In an electrical power distribution system, a ring main unit (RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch that feed a distribution transformer. The metal enclosed unit connects to the transformer either through a bus throat of standardized dimensions, or else through cables and is usually installed outdoors. Ring main cables enter and leave the cabinet. This type of switchgear is used for medium-voltage power distribution, from 7200 volts to about 36000 volts. (en)
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| - في أنظمة توزيع الطاقة الكهربائية، وحدة التغذية الحلقية (RMU (Ring Main Unit)) هي مجموعة مجمعة بالمصنع تتكون باختصار من مجموعة من المفاتيح الكهربائية المغلقة تستخدم لربط المحطات الفرعية ببعضها بطريقة الحلقة وداخل محطات الجهد المتوسط (11 كيلو فولت إلى 36 كيلو فولت) بغرض حماية المحولات الموصلة بها في حالة حدوث مشكلة بالشبكة أو فصل جزء من الشبكة (محول على سبيل المثال) في حالة الصيانة. (ar)
- In an electrical power distribution system, a ring main unit (RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch that feed a distribution transformer. The metal enclosed unit connects to the transformer either through a bus throat of standardized dimensions, or else through cables and is usually installed outdoors. Ring main cables enter and leave the cabinet. This type of switchgear is used for medium-voltage power distribution, from 7200 volts to about 36000 volts. The ring main unit was introduced in the United Kingdom and is now widely used in other countries. In North American distribution practice, often the equivalent of a ring main unit is built into a pad-mounted transformer which integrates switches and transformer into a single cabinet. (en)
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