If you work in communications and distribution networks, then you are already well aware of the importance of Surge Protection Devices (SPD) in maintaining the functionality of your systems.
They are commonly used for power electric supply networks, distribution and communication networks, but did you know that they are also valuable in lighting systems?
You have made the investment on energy efficient LED lighting… Now is the time to ensure that you protect that investment to the best level! Time to ensure you have SURGE PROTECTION on the panel that is supplying those LED fixtures! LED fixtures utilize electronics that are susceptible to SURGE. Installing Surge protection at the distribution panel can reduce these surges and any potential damage that may occur.
Surge Protection Devices (SPD) are electrical components used for voltage protection in power supply circuits and electrical distribution networks. They limit transient overvoltages and divert surge current to prevent equipment damage and downtime.
Mersen’s Surge-Trap® STXH surge protective device adds a critical layer of surge protection for your entire home. From your family room to your office, and your kitchen, your entire electrical system is protected. This simple whole house solution is installed at your load center – out of sight, out of mind.
Featuring Mersen’s industry leading TPMOV® Technology inside, Mersen’s Surge-Trap® SPDs meet the rigorous safety requirements of the UL 1449 4th edition safety standard and need no additional overcurrent protection.
A should match the utility system voltage where the device is to be installed
The Maximum Continuous Operating Voltage, this is the maximum voltage the device can withstand before conduction (clamping) begins. It is typically 15-25% higher than the nominal system voltage.
Voltage Protection Rating. A rating per the latest revision of ANSI/UL 1449, signifying the “rounded up” average measured limiting voltage of an SPD when the SPD is subjected to the surge produced by a 6 kV, 3 kA 8/20 µs combination waveform generator. VPR is a clamping voltage measurement that is rounded up to one of a standardized table of values. The standard VPR ratings include 330, 400, 500, 600, 700, etc. As a standardized rating system, VPR allows the direct comparison between like SPDs (i.e. same Type and Voltage).
is the peak value of current, through the SPD having a current waveshape of 8/20 where the SPD remains functional after 15 surges. The peak value is selected by the manufacturer from a predefined level UL has set. I(n) levels include 3kA, 5kA, 10kA and 20kA and may also be limited by the Type of SPD under test. Type 1 = 10kA or 20kA. Type 2 = 3kA, 5kA, 10kA or 20kA. SPD manufacturer selects the current to test their product with. SPD subject to 15 surges at chosen current, 1 minute apart with rated voltage applied between surges.
Short Circuit Current Rating. The suitability of an SPD for use on an AC power circuit that is capable of delivering not more than a declared rms symmetrical current at a declared voltage during a short circuit condition. SCCR is not the same as AIC (Amp Interrupting Capacity). SCCR is the amount of “available” current that the SPD can be subjected to and safely disconnect from the power source under short circuit conditions. The amount of current “interrupted” by the SPD is typically significantly less than the “available” current.
If Surge protection devices are OVERVOLTAGE protection . . . then why need to look at Nominal Discharge Current (In) ratings of SPD ?
In UL 1449 3rd edition, it was determined that ALL SPD manufacturers have their product tested to prove performance characteristics. In order to provide standard testing, Nominal Discharge Current (In) rating was chosen for a measure of how robust or rugged an SPD performs. While the SPD is an OVERVOLTAGE protection device, the I2t (discharge energy) that the SPD can handle safely without damage is selected by the manufacturer for the test. Typically Type 1 = 10kA or 20kA, Type 2 = 3kA, 5kA, 10kA or 20kA.
When selecting or specifying an SPD, looking at all other performance characteristics, one should select/specify an SPD with highest Nominal Discharge Current (In) rating. This will provide the greatest degree of longevity for the SPD (based on ACTUAL test results).
Looking at I2t :
Peak Surge Current rating is a measure of how large, or expected longevity of an SPD is, as given by the manufacturer. Peak Surge Current is NOT a UL 1449, 3rd edition, tested parameter. Rather it is information that each manufacturer determines for their given product.
Did you know? 80% of surges occur WITHIN your own facility! Utilizing a Mersen Surge Protective Device on your electrical distribution panel ensures a high degree of surge protection!
|Residential, Commercial & Industrial
|Type 1, Indoor Application - STXH product
|120/240volt, split phase
|Type 1, Indoor Applications - STXH,STXR product
|120/240volt, split phase
|120/208volt, 3ph Y
|347/600volt, 3ph, N-G
|347/600volt, 3ph, Y
|Industrial (Control Panels)/Commercial
|Din Rail, Pluggable Style - STP product
|120/240volt, split phase
Protect your facility from surges by utilizing Surge Protection Devices (SPD). This guide reveals the ins and outs of SPDs to help you select the right SPD for your application:
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