Equipment and appliances requiring reactive energy: Difference between revisions
From Electrical Installation Guide
m (r2.7.2) (robot Adding: zh:设备需要的无功电能) |
(updated according to guide 2013) |
||
| Line 1: | Line 1: | ||
{{ | {{Menu_Power_Factor_Correction}} | ||
All AC | All AC equipment and appliances that include electromagnetic devices, or depend on magnetically coupled windings, require some degree of reactive current to create magnetic flux. | ||
The most common items in this class are transformers | The most common items in this class are transformers, reactors, motors and discharge lamps with magnetic ballasts (see '''Fig. L5'''). | ||
The proportion of reactive power (kvar) with respect to active power (kW) when | The proportion of reactive power (kvar) with respect to active power (kW) when a piece of equipment is fully loaded varies according to the item concerned being: | ||
* 65-75% for asynchronous motors (corresponding to a Power Factor 0.8 – 0.85) | |||
* 5-10% for transformers (corresponding to a Power Factor close to 0.995) | |||
[[Image:FigL02.jpg|none|399px]] | |||
'''''Fig. L5:''''' '''Power consuming items that also require reactive energy''' | |||
[[ru:Установки и приборы, требующие реактивной мощности]] | [[ru:Установки и приборы, требующие реактивной мощности]] | ||
[[zh:设备需要的无功电能]] | [[zh:设备需要的无功电能]] | ||
Revision as of 15:19, 23 August 2013
All AC equipment and appliances that include electromagnetic devices, or depend on magnetically coupled windings, require some degree of reactive current to create magnetic flux.
The most common items in this class are transformers, reactors, motors and discharge lamps with magnetic ballasts (see Fig. L5).
The proportion of reactive power (kvar) with respect to active power (kW) when a piece of equipment is fully loaded varies according to the item concerned being:
- 65-75% for asynchronous motors (corresponding to a Power Factor 0.8 – 0.85)
- 5-10% for transformers (corresponding to a Power Factor close to 0.995)
Fig. L5: Power consuming items that also require reactive energy
ru:Установки и приборы, требующие реактивной мощности
zh:设备需要的无功电能
