{"product_id":"citel-ds220s-24dc-24vdc-off-grid-surge-arrestor","title":"Citel DS220S-24DC 24VDC Off Grid Surge Arrestor","description":"\u003cp class=\"main-text\"\u003e  \t\u003cfont\u003e\u003cstrong\u003eCitel DS220S-24DC 24VDC Off Grid Surge Arrestor\u003c\/strong\u003e\u003c\/font\u003e\u003c\/p\u003e  \u003cp class=\"main-text\"\u003e  \t\u003cfont\u003eThe Citel DS220DC series is designed to protect 12V, 24V, 48V and 150V DC power lines for an off-grid PV system. The surge protectors protect the charge controller and other system electronics. DS220DC automatically reset after each lightning surge or electrical transient. These surge arrestors clamp at much lower voltage than Delta surge arrestors at left so they offer much better protection for charge controllers and inverters in low-voltage DC systems.\u003c\/font\u003e\u003c\/p\u003e  \u003cp class=\"main-text\"\u003e  \t\u003cfont\u003eCitel PV surge protectors are DIN mount and are ideal for placement inside combiner boxes.\u003c\/font\u003e\u003c\/p\u003e  \u003cp\u003e  \t\u003cfont color=\"#363636\"\u003e\u003cspan class=\"style51 style58\"\u003e\u003cstrong\u003e\u003cfont color=\"#000000\"\u003eDC Power Surge Protection Overview\u003c\/font\u003e\u003c\/strong\u003e \u003c\/span\u003e\u003c\/font\u003e\u003c\/p\u003e  \u003cp\u003e  \t\u003cfont\u003eSolar Photovoltaic (PV) Systems are very demanding and cost intensive projects. They often require the Solar PV System to be operational for several decades before it can yield the desired return on investment.\u003c\/font\u003e\u003c\/p\u003e  \u003cp class=\"style63\"\u003e  \t\u003cfont\u003eMany manufacturers will guarantee a system life of greater than 20 years while the inverter is generally guaranteed for only 5-10 years. All costs and return on investments are calculated based on these time periods. However, many PV systems are not reaching maturity due to the exposed nature of these applications and its interconnection back to the AC utility grid. The solar PV arrays, with its metallic frame and mounted in the open or on roof tops, act as a very good lightning rod. For this reason, it is prudent to invest in surge protection to eliminate these potential threats and thus maximize the systems life expectancy. The cost for a comprehensive surge protection system is less than 1% of the total system expenditure.\u003c\/font\u003e\u003c\/p\u003e  \u003cp class=\"style63\"\u003e  \t\u003cstrong\u003e\u003cfont\u003eTo analyze the full threat level of the installation, we must make a risk assessment.\u003c\/font\u003e\u003c\/strong\u003e\u003c\/p\u003e  \u003cp class=\"main-text\"\u003e  \t \u003c\/p\u003e  \u003ctable cellpadding=\"0\" cellspacing=\"0\" width=\"601\"\u003e  \t\u003ctbody\u003e  \t\t\u003ctr\u003e  \t\t\t\u003ctd width=\"181\"\u003e  \t\t\t\t\u003cdiv align=\"right\"\u003e  \t\t\t\t\t\u003cfont\u003eOperational Downtime Risk – \u003c\/font\u003e \u003c\/div\u003e  \t\t\t\u003c\/td\u003e  \t\t\t\u003ctd width=\"15\"\u003e  \t\t\t\t\u003cfont\u003e \u003c\/font\u003e \u003c\/td\u003e  \t\t\t\u003ctd width=\"403\"\u003e  \t\t\t\t\u003cfont\u003eAreas with severe lightning and unstable utility power are more vulnerable.\u003c\/font\u003e \u003c\/td\u003e  \t\t\u003c\/tr\u003e  \t\t\u003ctr\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cdiv align=\"right\"\u003e  \t\t\t\t\t\u003cfont\u003ePower Interconnection Risk –\u003c\/font\u003e \u003c\/div\u003e  \t\t\t\u003c\/td\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cfont\u003e \u003c\/font\u003e \u003c\/td\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cfont\u003eThe greater the surface area of the solar PV array, the more exposure to direct and\/or induced lightning surges. \u003c\/font\u003e \u003c\/td\u003e  \t\t\u003c\/tr\u003e  \t\t\u003ctr\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cdiv align=\"right\"\u003e  \t\t\t\t\t\u003cfont\u003eApplication Surface Area Risk –\u003c\/font\u003e \u003c\/div\u003e  \t\t\t\u003c\/td\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cfont\u003e \u003c\/font\u003e \u003c\/td\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cfont\u003eThe AC utility grid is a likely source of switching transients and\/or induced lightning surges. \u003c\/font\u003e \u003c\/td\u003e  \t\t\u003c\/tr\u003e  \t\t\u003ctr\u003e  \t\t\t\u003ctd\u003e  \t\t\t\t\u003cdiv align=\"right\"\u003e  \t\t\t\t\t\u003cfont\u003eGeographic Risk –\u003c\/font\u003e \u003c\/div\u003e  \t\t\t\u003c\/td\u003e  \t\t\t\u003ctd valign=\"top\"\u003e  \t\t\t\t\u003cfont\u003e \u003c\/font\u003e \u003c\/td\u003e  \t\t\t\u003ctd valign=\"top\"\u003e  \t\t\t\t\u003cfont\u003eConsequences of system downtime are not only limited to equipment replacement. Additional losses can result from lost orders, idle workers, overtime, customer\/management dissatisfaction, expedited freight charges and expedited shipping costs.\u003c\/font\u003e \u003c\/td\u003e  \t\t\u003c\/tr\u003e  \t\u003c\/tbody\u003e  \u003c\/table\u003e  \u003cp\u003e  \t \u003c\/p\u003e  \u003cp\u003e  \t\u003cstrong\u003e\u003cfont\u003e\u003cfont\u003e\u003cspan class=\"style60\"\u003eRecommend Practices\u003c\/span\u003e\u003cbr\u003e  \t\u003cbr\u003e  \t\u003c\/font\u003e\u003c\/font\u003e\u003c\/strong\u003e\u003cspan class=\"style63 style64\"\u003e\u003cfont\u003e\u003cfont\u003e\u003cstrong\u003e1) Earthing System\u003c\/strong\u003e\u003cbr\u003e  \tSurge Protectors shunt transients to the earth grounding system. A low impedance ground path, at the same potential, is critical for the surge protectors to function properly. All power systems, communication lines, grounded and ungrounded metallic objects need to be equipotentially bonded for the protection scheme to work efficiently.\u003c\/font\u003e\u003c\/font\u003e\u003cbr\u003e  \t\u003cbr\u003e  \t\u003cstrong\u003e \u003cfont\u003e2) Underground Connection from External PV Array to Electrical Control Equipment\u003c\/font\u003e\u003c\/strong\u003e\u003cbr\u003e  \t\u003cfont\u003eIf possible, the connection between the external Solar PV Array and the internal power control equipment should be underground or electrically shielded to limit the risk of direct lightning strikes and\/or coupling.\u003cbr\u003e  \t\u003cbr\u003e  \t\u003cstrong\u003e3) Coordinated Protection Scheme\u003c\/strong\u003e\u003cbr\u003e  \tAll available power and communication networks should be addressed with surge protection to eliminate PV system vulnerabilities. This would include the primary AC utility power supply, Inverter AC output, Inverter DC input, PV string combiner and other related data\/signal lines such as RS-485, 4-20mA current loop, PT-100, RTD, and telephone modems.\u003c\/font\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Citel","offers":[{"title":"Default Title","offer_id":55064710414675,"sku":"053-04203","price":48.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1076\/9324\/4755\/files\/DS210-12DC.jpg?v=1790373883","url":"https:\/\/progradewarehouse.com\/products\/citel-ds220s-24dc-24vdc-off-grid-surge-arrestor","provider":"PRO GRADE WAREHOUSE","version":"1.0","type":"link"}