Shenzhen Zhengxin Electronics Co., Ltd.
Tel: +86 755 2715 8500
+86 755 2716 8500
Fax: +86 755 2716 8600
Service Hotline (China): 400 779 1878
Address: 5th Floor, Block 10, Jinfeng Industrial Park, Tangwei 3rd Industrial Zone, Gongming Street, Guangming District, Shenzhen City, Guangdong Province, China 518132.
Power problems can occur in two forms:
a) Problems or disturbances that occur with a mains supply. Here we are concerned with Power Quality issues.
b) When the mains supply completely fails. Here we are concerned with how to keep systems running and business continuity.
Power supply problems are caused by various sources, for example distribution network faults, system switching, weather and environmental conditions, heavy plant and equipment or simply just faulty hardware. Regardless of the cause of the problem, the result will include one or more of the following types of power problems:
Sags: are short duration decreases in the mains supply voltage which generally last for several cycles. They are one of the more common forms of disturbances. When sags occur sensitive equipment can lockor hang causing data loss and system resets.
Surges: are short duration increases in the mains supply voltage which generally last several cycles. When surges occur equipment can suffer from premature failure. The high voltage causes wear and tear and general component degradation. This may not be noticeable until failure, though heat out is a good sign.
Transients and Spikes: these are very fast high energy surges lasting only a few milliseconds. When transients or spikes occur equipment
can lock or hang, crash and even suffer damage which inevitably causes data loss and corruption. Large transients can occur from local or
worst case a direct lightning strike.
Electrical Noise: this is a high frequency noise either common or normal mode which can cause severe disruption and damage to circuits
Brownouts: are long term sags in the mains supply voltage which can last up to several days. During a brownout equipment can reset or
Blackouts and Mains Failures: when the mains supply fails completely this is known as a total mains failure or blackout. A break in
the mains supply of only several milliseconds is sufficient enough to crash, lock or reset many of the components that make up a typical
data or voice processing IP network, such as PC, terminal, console, server, PBX, printer, modem, hub or router.
A survey can be used to identify the types, duration and magnitude of power problems experienced on a site.