Maintaining the right voltages is important for the effectiveness and durability of your electrical equipment. Voltages that are too high or too low can make irrigation pumps, 电动烘干机, lights and other equipment less efficient.
作为我们安全承诺的一部分, 可靠性和可负担性, hg8868皇冠下载 follows the American National Standard for Electric Power Systems and Equipment – Voltage Ratings (60Hz) (ANSI C84.1). This standard describes the normal ranges for voltage delivered to your point of service (the electric meter), and end-user equipment voltage ratings.
基于此标准, we strive to keep voltages delivered to your point of service within 5% of the nominal voltage (120V, 208V, 240V, 277V and 480V) under normal operating conditions. So if the nominal voltage at your meter is 480V, we strive to keep the voltage delivered to it between 456V and 504V.
一个独立的标准, 国家电气规范, recommends limiting the additional voltage drop — beyond the 5% fluctuation — between the meter and the outlet or equipment in your electrical system to 5% or less. 符合ANSI C84标准的设备.1 voltage standard should perform adequately even with this additional voltage drop.
例如, if a service point with a nominal voltage rating of 480V operates at 456V, and voltage drops an additional 5% — 24V — the voltage at the end-user equipment will be 432V. That’s still within the normal voltage range.
Major voltage deviations are rare but could occur during abnormal conditions like a transmission line outage, or due to other factors beyond hg8868皇冠下载’s control. Voltage relays can help protect equipment like motors from over-voltage, 欠压和电压不平衡. An electrician can help you select voltage relays or other protective devices for your electrical system.