Switch Safety

Disconnect Safety

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H361DX 600V 30A 3Phase NEMA 4X Fusible Safety Disconnect Switch
H361DX 600V 30A 3Phase NEMA 4X Fusible Safety Disconnect Switch
$1,781.38
H464 600V 200A 3Phase NEMA 1 Fusible Safety Disconnect Switch
H464 600V 200A 3Phase NEMA 1 Fusible Safety Disconnect Switch
$688.73
Square D disconnect safety switch H365 3 pole 600 VAC 400 amp fusible
Square D disconnect safety switch H365 3 pole 600 VAC 400 amp fusible
$625.00
HU361DX 600V 30A 3Phase NEMA 4X Non-Fusible Safety Disconnect Switch
HU361DX 600V 30A 3Phase NEMA 4X Non-Fusible Safety Disconnect Switch
$261.38
H363 600V 100A 3Phase NEMA 1 Fusible Safety Disconnect Switch
H363 600V 100A 3Phase NEMA 1 Fusible Safety Disconnect Switch
$389.31
Square D H363 Fusible 100 Amp Nema 1 Heavy Duty Safety Disconnect Switch Used
Square D H363 Fusible 100 Amp Nema 1 Heavy Duty Safety Disconnect Switch Used
$175.00
I-T-E NF-352 SAFETY DISCONNECT SWITCH 60 AMP + 1 year warranty
I-T-E NF-352 SAFETY DISCONNECT SWITCH 60 AMP + 1 year warranty
$39.99
Siemens GF321N Type 1 Enclosure 30A 240V Safety Disconnect 1 Year Warranty
Siemens GF321N Type 1 Enclosure 30A 240V Safety Disconnect 1 Year Warranty
$39.99
92446 600V 600A 4Pole 3Phase 4Wire NEMA 1 Non-Fusible Safety Disconnect Switch
92446 600V 600A 4Pole 3Phase 4Wire NEMA 1 Non-Fusible Safety Disconnect Switch
$4,468.37
92346 600V 600A 2Pole 1Phase 2Wire Non-Fusible Safety Disconnect Switch
92346 600V 600A 2Pole 1Phase 2Wire Non-Fusible Safety Disconnect Switch
$3,964.12
Square D H366NR 600a 600v 3P 4W Heavy Duty Disconnect Fusible Safety Switch- NIB
Square D H366NR 600a 600v 3P 4W Heavy Duty Disconnect Fusible Safety Switch- NIB
$3,200.00
92355 240V 400A 3Pole 3Phase 3Wire NEMA 1 Non-Fusible Safety Disconnect Switch
92355 240V 400A 3Pole 3Phase 3Wire NEMA 1 Non-Fusible Safety Disconnect Switch
$2,654.55
92454 240V 200A 4Pole NEMA 1 Non-Fusible Safety Disconnect Switch
92454 240V 200A 4Pole NEMA 1 Non-Fusible Safety Disconnect Switch
$1,539.44
H365R 600V 400A 3Phase NEMA 3R Fusible Safety Disconnect Switch
H365R 600V 400A 3Phase NEMA 3R Fusible Safety Disconnect Switch
$1,469.82
H366 600V 600A 3Phase NEMA 1 Fusible Safety Disconnect Switch
H366 600V 600A 3Phase NEMA 1 Fusible Safety Disconnect Switch
$1,292.75
HU365 600V 400A 3Phase NEMA 1 Non-Fusible Safety Disconnect Switch
HU365 600V 400A 3Phase NEMA 1 Non-Fusible Safety Disconnect Switch
$715.12
D326 240V 600A 3Pole Fusible Safety Disconnect Switch
D326 240V 600A 3Pole Fusible Safety Disconnect Switch
$538.09
Siemens Safety Switch Fusible Disconnect 400A 3PH 600/480V HF365 1 YEAR WARRANTY
Siemens Safety Switch Fusible Disconnect 400A 3PH 600/480V HF365 1 YEAR WARRANTY
$499.99
Siemens Safety Switch Fusible Disconnect 400A 3PH 600/480V F355 1 YEAR WARRANTY
Siemens Safety Switch Fusible Disconnect 400A 3PH 600/480V F355 1 YEAR WARRANTY
$399.99
H362RB 600V 60A 3Phase NEMA 1 Fusible Safety Disconnect Switch
H362RB 600V 60A 3Phase NEMA 1 Fusible Safety Disconnect Switch
$335.68
H363 600V 100A 3Phase NEMA 1 Fusible Safety Disconnect Switch
H363 600V 100A 3Phase NEMA 1 Fusible Safety Disconnect Switch
$223.77
H362RB 600V 60A 3Phase NEMA 1 Fusible Safety Disconnect Switch
H362RB 600V 60A 3Phase NEMA 1 Fusible Safety Disconnect Switch
$157.38



1911 Sear Disconnect: Safety or No?





Dielectric Voltage Stand up to Check of Electrical Products

Dielectric voltage withstand check is demanded in nearly every security standard of
electrical safety tester
products, for dielectric voltage stand up to check is really a vital component of security standard of electrical items. Dielectric voltage stand up to test will be the so-called higher voltage check which happens to be a test to determine whether or not the insulating materials and spatial distances adhere to the standard by giving a voltage which happens to be higher compared to the rated voltage to the equipments for certain time.

Check Method

one. Check if the main power change in the hipot tester is “OFF”.

2. Except for the special design in the equipment, all the other conductive metal parts really should be well grounded.

3. Connect all the wires or terminals at the energy input end in the measured equipment.

4. Close all the energy switches and relays, etc.

5. Set the tested voltage of the hipot tester to zero.

6. Connect the higher voltage transmission line (generally red) to the energy input end in the measured equipment.

7. Connect the loop grounding line (generally black) towards the accessible conductive metal part in the measured equipment.

8. Close the main energy change of the hipot tester and raise the secondary voltage of the hipot tester to the desired value slowly. Usually, the raise speed of voltage must be kept below 500V/sec.

9. Maintain this testing voltage within the time specified.

10. Lower the testing voltage slowly.

11. Disconnect the main energy switch of the hipot tester. First disconnect the high voltage transmission line and then the loop grounding line.

The following cases show that the measured equipment fails the check:

The testing voltage cannot be raised towards the desired voltage value or it lowers instead.

There may be warning signal on the hipot tester.

It needs to be noticed that we ought to be extremely careful because there may be higher voltage which happens to be danger for human body existing in the dielectric voltage stand up to test.

Cases that can make the equipment free from factory dielectric voltage stand up to check.

The energy input of the items will be the ELV or SELV in the secondary output of other items, such as power supply and transformer.

The merchandise will use alternative power supply as component, and this energy supply is identified by CSA, of complete case and input and output connector. For it's identified by CSA, this energy supply has passed the dielectric voltage withstand check. Therefore, we can consider relieving it from dielectric voltage withstand check. Nonetheless, we have to check whether the energy supply is damaged before it is installed.

When the signal transformer is applied within the circuit of same voltage, and it's not the safety device, we can consider relieving the component from the start towards the iron core from dielectric voltage withstand test.

Matters that must be paid specially attention to:

It must be specified that only trained and authorized personnel can come into the check zone and operate the equipment.

Fixed eye-catching warning signals ought to be set around the test zone to keep other people from the danger area.

During the check, all the personnel, including the operators, must keep distance with the
hipot tester
and measured equipment.

When the tester is started, the output line should not be touched by anyone.




Protect Yourself Against Malware

The same Internet connection that lets you reach out and touch millions of Web servers, e-mail addresses, and other digital entities across the globe also endangers your PC and the information it contains about you.

Every day, virus, spyware, and adware creators come up with new, ingenious ways to gain access to your PC. These steps will help keep you safe:

Think before you click:
Attached files that end with .exe, .com, .bat, and .scr, as well as scriptable document files, including .doc and .xls, can infect your PC with a single click. Many e-mail programs block access to executable-file attachments.

Use a spam filter:
Though some malware makes its way onto your computer via drive-by browser hijacking, e-mail is its other main source. Install a junk-mail filter to reduce your chances of activating malicious scripts embedded in messages.

Update your antivirus software:
Allowing your antivirus software to continue running after its subscription has expired is actually worse than using no antivirus software at all: Not only do you lack the crucial virus signature database updates, but you expose your system to malware that targets known flaws in antivirus software.

Tips on avoiding Viruses and Worms:


    Install antivirus software, update regularly, and use it regularly.

    Never open unsolicited e-mail attachments with the file extensions VBS, SHS, or PIF.

    Disconnect your network or modem cable when you are not using your computer-or just power it down.

    Avoid attachments with sexual file names.

Antivirus software is a software installed on your computer that protects you from viruses. Antivirus software programs can contain between 40,000 - 100,000 "virus definitions" that are updated on a daily or as needed basis.

My personal favorite free antivirus app is Grisoft AVG Anti-Virus Free. In the paid programs, i do recommend Kaspersky anti virus. Its great in work.

Get a second opinion:
Install and use only one antivirus program at a time on your computer because multiple real-time scanners will conflict with one another. If you have doubts about your programs effectiveness, however, use a free online virus scanner, such as Panda Softwares ActiveScan) or Trend Micros HouseCall.

Download with discretion:
Any program you download and run on your system could potentially result in a lethal infection or zombification. Download software only from reputable online sources that first scan all of their download files for any malware.

Use a bidirectional firewall:
Windows XP and Vista each come with a firewall that blocks incoming attacks; it is enabled by default in Windows XP Service Pack 2 and later. For the best protection, you will also want to block unwanted outgoing connections made by malware on your PC that attempts to either connect to a remote server or send out spam.

Vistas firewall can be set up to do that, but configuring it is not a job for the average Windows user. Instead, get one of several free bidirectional firewall programs, such as Zone Labs ZoneAlarm Free, or Agnitums Outpost Firewall Free.

Most commercial security software suites also include a firewall program.

Use antispyware:
Anyone who uses a computer is susceptible to spyware infection. In fact, nine out of 10 Internet-connected PCs are infected with spyware. Spyware threats can be any application that may track your online or offline PC activity. If you use the Internet, its very likely some form of spyware threats are already at work on your PC.

Detecting spyware is tough and spyware removal is even more difficult. Even if you think you have successfully removed an unwanted program manually, a remaining tickler file can trigger a complete reinstallation the next time you start your PC. And as a survival tactic, malware programs often leave similar traces elsewhere on your system so the game of cat and mouse never ends.

Spyware, adware, and some browser cookies slow down your system, cause crashes, and track your online activity. Antispyware utilities work much like antivirus software, detecting and removing the unwanted software from your PC. We picked Webroot Spy Sweeper 5 and NoAdware as our favorite in our "Spyware Fighters" antispyware roundup.

Upgrade from XP:
Service Pack 2 makes Windows XP much safer, but the operating system still has security holes, and it remains a top target for malware authors. Windows Vistas new user access controls ask your permission before launching new programs, which reduces the chances that malware can leap from the Web to your PC automatically, though some Vista bugs have already been found.

Both the Mac OS and Linux offer even stronger safeguards against program launching, and they are rarely the targets of malware attacks, which makes it very unlikely that Web-hosted attacks--or any other kind--will afflict computers running those operating systems.Cher K Markov articles on various subjects and has a treasure chest of information and resources onAntiSpywareathttp://online-downloads.blogspot.com

Article Source: http://www.simplysearch4it.com/article/52126.html

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