Limitations of emergency power outages: How to prevent EPO from causing downtime?

In many cases, http://www.aliyun.com/zixun/aggregation/13608.html "> Data center managers do not derive any substantial benefit from the 645 section, but instead mistakenly use EPO (emergency Power off, emergency power-off switches also place IT management at risk of downtime. This article will talk about EPO limitations, and if you do need EPO, this article will also show you how to install the safest.

So far, a lot of data center managers have been praising 645 to support EPO, but does 645 apply to today's data centers? There are also many objections, and the following arguments are more well-founded:

Today's high-density racks require a lot of power, requiring a number of dedicated lines, and data center managers have found that the benefits of putting them under the floor are all gone. And now it's more common to put the power on top, and with a product like way, you can bring similar flexibility without the recommendation of section 645.

There were a lot of copper cables in the previous data center, but now they are reduced and replaced by fiber optics, which is the result of new network and storage topologies and growing speed requirements. The optical fiber brings a lot of connections to smaller cables, resulting in a sharp reduction in the price difference between fire and non fire-grade cables. This makes the price and benefits of clause 645, the potential crisis of downtime immeasurable.

Few critical computing devices are now limited to operations in the UPS 750 Va. To pick the most critical equipment, using such a small UPS component to give each of them a separate power supply, I am afraid that in most cases it will not be done. It may take hundreds of to power the device, causing the operation to become a nightmare. Is the advantage of orderly shutdown worth using so many ups? Does downtime occur if a non-enterprise component is broken? I don't think so.

In the data center, the use of the total is worthless because all the equipment is drilled into the grounding metal cabinet. In today's processor processing frequency, the full signal site specification is of greater value. No matter how you isolate your grounding system, you will have to hook up with the construction site, which is NEC and realistic requirements.

Security。 It is best to comply with the standards set out in ANSI-J-STD-607-A (telecommunications grounding and connection safety requirements for commercial buildings), rather than continue to recognize the Delli of section 645 because most of them are useless for the current data centers.

What should you be aware of using EPO?

Section 645 can still bring benefits to the datacenter. Local governments such as electrical inspectors, fire inspectors, or committees may require you to install EPO (even if section 645 does not actually apply). To note some nuances, the following may be ignored:

EPO switch: This part of the request is often misread, someone tried to install a layer of glass needed to break, to reduce the risk of this switch-this practice is often seen on the fire switch, when the need for the small hammer smashed glass press button, but this is not the norm. Section 645 clearly stated that "press the button to cut off the power."

to NEC in the 2011 update, 645 Requirements "These buttons should be placed on important exports, easy to contact", the 2011 NEC revision rules, allowing EPO to be placed in the vicinity of the room, but only in the authority of the authorities prior to the permission of the line, and must be placed in a clearly marked, A place that can be noticed by local fire officials.

It equipment rooms must be in the firewall, all can penetrate the place must seal up the UL listed fireproof material, the material must also conform to each penetrate the size and the pipeline passes through the construction model. All ducts through the wall have to be equipped with automatic fire gates.

The IT equipment room must be provided with a separate HVAC system, or the room serviced by the system must be able to isolate IT equipment rooms through an automatic fire barrier once the smoke or EPO operation is detected. Fire gates are often overlooked, allowing the catheter to pass directly through the room.

It equipment rooms are only allowed to transport personnel who operate the IT equipment into the.

The EPO switch must directly disconnect all power supplies, including IT equipment, air-conditioning, UPS batteries (with occasional exceptions), and so on.

Just because of the gas fire system, it is not necessary to install EPO, which can also cause accidental downtime. But people do this for two reasons: first, before releasing the fire-extinguishing gas, all the equipment power and air-conditioning must be turned off in time lest the fans in these devices disperse the fire-extinguishing gas, thus preventing fire from being avoided. Before gas activation, the room must also be sealed with a fireproof gate. Because the EPO's circuit requirements are the same, so everyone thinks that this switch is logical. 2nd, there is a misconception that EPO is required to install under a gas-based system. This is wrong and illogical. The purpose of EPO was to have a simple way to turn off the power supply before the fire department could enter a room with an electric spark under an active floor. Because the gas system's operating device has been able to do so, other methods are not necessary. Before the fire department arrives, the power supply will be cut off in time.

EPO Protection cover

If you are going to install the EPO switch, mark the point, put it in a transparent protective lid box, and immediately beep if the lid is opened. This will prevent most unplanned downtime and prevent those curious guys from touching them at random.