Solar-Catalog.com 2009
Lightning & Surge Protection
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Why Have Surge Protection Photovoltaic, wind and hydroelectric systems usually have long runs of exposed wire that can pick up surges from lightning, even if the lightning strike is not nearby. These power surges can damage sensitive electronic components in meters, charge controls and inverters. Surges can also damage telephone, audio and video equipment connected to the power system. It is a good idea to install surge protection on all incoming wires in the system, including incoming PV, wind or hydroelectric power lines, AC generator lines, telephone and antenna leads. Proper grounding is absolutely necessary for lightning protection to be effective. In the event of a direct strike, damage may occur, even with surge protectors installed. |
The Delta Lightning Arrestors have a max current rating of 60,000 amps and 2,000 joules per line. Response time is 25ns to clamp 50,000 amps. Mounts easily in a 1/2" knockout.
Install the DC version for surge protection on wires coming from a PV array, DC wind generator or DC hydroelectric turbine. Use the 600 VDC unit for high-voltage grid-tie PV arrays. Lightening protection can be installed in a combiner box, DC load center or intertie inverter.
The AC versions can be mounted in your AC load-center to protect 120/240 VAC equipment and on AC wiring running outside of the building, to generators, pumps or outbuildings. All units are waterproof.
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Delta Model |
Description |
SKU |
Price |
Purchase |
| LA302DC | Arrestor for up to 300 VDC |
053-04115 |
$40 |
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| LA602DC | Arrestor for up to 600 VDC |
053-04109 |
$42 |
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| LA302R | Arrestor for up to 300 VAC |
053-04112 |
$40 |
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| LA303R | Arrestor for up to 300 VAC 3-Phase |
053-04118 |
$50 |
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| Mounting Bracket for surge Arrestors |
053-04138 |
$5 |
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PolyPhaser Lightning Protectors set the standard for the lightning protection industry. They are the product of choice in the telecom industry.
Designed to protect PWM switching and relay type charge controls, these units can handle the high voltage of open circuit arrays and will not cause power robbing voltage drop.
Models are available for 12 and 24 volt negative ground systems and 48 volt negative and positive ground systems. Maximum continuous current 50 amps.
|
Model |
System Voltage |
Description |
SKU |
Price |
Purchase |
|
IS17NG |
12 |
17V Negative Ground |
053-04165 |
$225 |
|
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IS35NG |
24 |
35V Negative Ground |
053-04168 |
$225 |
|
|
IS60NG |
48 |
60V Negative Ground |
053-04171 |
$225 |
|
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IS60PG |
48 |
60V Positive Ground |
053-04174 |
$225 |
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Citel PV surge protectors are DIN mount and are ideal for placement inside combiner boxes.
The Citel DS210DC 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. DS210DC 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.
| Citel model | Nominal volts |
Maximum DC volts |
Discharge current |
Width in (mm) |
SKU | Price | Purchase |
| DS210-12DC | 12 | 15 | 1 kA | 0.7 (18) | 053-04201 | $52 |
|
| DS210-24DC | 24 | 30 | 1 kA | 0.7 (18) | 053-04203 | $52 |
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| DS210-48DC | 48 | 56 | 1 kA | 0.7 (18) | 053-04205 | $52 |
|
| DS210-95DC | 95 | 100 | 2 kA | 0.7 (18) | 053-04207 | $52 |
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| DS210-130DC | 130 | 150 | 2 kA | 0.7 (18) | 053-04209 | $52 |
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The DS50PV is designed to protect the solar panel array at the solar PV array combiner box for a utility-interactive PV system. The DS50PV is designed to withstand 40kA (8/20us) induced transient surges and is designed with replaceable modules.
Use the DS50PV-500 for systems with inverters that have an upper limit of 500 volts. Use the DS50PV-800 for inverters that allow arrays over 500 VDC. For use with grounded arrays.
| Citel model | Nominal volts |
Maximum DC volts |
Discharge current |
Width in (mm) |
SKU | Price | Purchase |
| DS50PV-500 | 500 | 530 | 20 kA | 1.4 (36) | 053-04218 | $128 |
|
| DS50PV-1000 | 800 | 840 | 20 kA | 1.9 (48) | 053-04220 | $164 |
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DS60PV are Type 1 heavy duty surge protectors, recommended when a direct lightning strike is possible on the installation. They are available in 500- and 1000-VDC operating voltages. The use of Type 1 surge protector is recommended at both ends of the DC power supply line (solar panel side and inverter/converter side).
The DS60PV is made with a monobloc enclosure and mounts on DIN rail.
| Citel model | Nominal volts |
Maximum DC volts |
Discharge current |
Width in (mm) |
SKU | Price | Purchase |
| DS60PV-500 | 500 | 550 | 40 kA | 2.8 (72) | 053-04224 | $168 |
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| DS60PV-1000 | 1000 | 1000 | 40 kA | 2.8 (72) | 053-04226 | $279 |
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This page last up-dated on July 03, 2009