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SPD Series: UL 1449 3rd Edition
Eaton’s SPD series surge protective devices are the latest and most advanced UL 1449 3rd Edition certified surge protectors. Units are available integrated within Eaton electrical assemblies, including panelboards, switchboards, motor control centers, switchgear and bus plugs. Application of SPD Series units throughout a facility will ensure that equipment is protected with the safest and most reliable surge protective devices available. SPD Series units are available in all common voltages and configurations and also in a variety of surge current capacity ratings from 50 through 400 kA. Three feature package options are also available to choose from. The breadth of the SPD Series’ features, options and configurations ensures that the correct unit is available for all electrical applications, including service entrances, distribution switchboards, panelboards and point-of-use applications.
Powerware SPD Features
Eaton’s SPD series surge protective devices are the latest and most advanced UL 1449 3rd Edition certified surge protectors. Units are available integrated within Eaton electrical assemblies, including panelboards, switchboards, motor control centers, switchgear and bus plugs. Application of SPD Series units throughout a facility will ensure that equipment is protected with the safest and most reliable surge protective devices available.
SPD Series units are available in all common voltages and configurations and also in a variety of surge current capacity ratings from 50 through 400 kA. Three feature package options are also available to choose from.
The ever increasing use of microprocessors and other sensitive electronic equipment has increased the necessity for facility-wide surge protection. These sensitive electronic components are utilized within many pieces of equipment, including computers, programmable logic controllers, and other commonly used electrical and electronic equipment. Surges can wreak havoc on equipment, causing catastrophic failures, process interruptions and premature aging leading to failure. The application of surge protective devices (SPDs) can mitigate problems with sensitive electronic equipment, keeping the equipment and the related processes up and running reliably without disruption or damage due to surge-related events. In addition to externally generated surge events, such as lightning and grid switching, equipment is also susceptible to damage by internally generated surges. In fact, the majority of surges are generated internally by commonly used items, such as fluorescent lighting ballasts, light dimmers, photocopiers, fax machines and variable frequency drives. This further reinforces the necessity for facility-wide surge protection applied at all stages of the electrical distribution system, from the electrical service entrance down to the single-phase loads.
Surge suppression is now safer than ever with the SPD series
The SPD Series employs safety and design features that make surge protection safer than ever. Unlike many surge protective devices, the SPD Series contains no user-serviceable parts or items that require periodic maintenance, such as replaceable surge modules, replaceable fuses, surge counter memory backup batteries or wire lugs that require periodic retightening. Integrated versions of the unit are factory installed, meaning no potential contact with harmful voltages present within the unit is possible.
The SPD Series has also taken safety to the next level by using thermally protected metal oxide varistors (MOVs) as its core surge suppression component. These thermally protected MOVs operate in a safe manner, even when subjected to abnormal conditions, such as temporary overvoltages or high fault current conditions. When one of these conditions exists, the thermally protected MOVs are removed from the circuit quickly and safely before a potentially unsafe condition can occur, with absolutely no discharge of smoke or ionized gases. Usage of this technology eliminates any concerns of damage occurring to other components within the electrical assembly should failure of an integrated SPD occur. Using the latest in technology and surge protective device design, the SPD Series provides safe, reliable, worry-free surge protection.
The integrated SPD performance advantage
Installation conductor length is the single most important factor related to an SPD’s performance. Performance decreases as the connected conductor length increases. Integrating the SPD within the electrical assembly provides the best possible surge protection by keeping installation conductor lead lengths as short as possible. Integrating the SPD within an electrical assembly can decrease let-through voltages by hundreds of volts, providing you with the best possible surge protection for sensitive electronic loads. The SPD Series is available as an integrated device within the following
Eaton electrical assemblies:
Enhanced protection status indicators
The Eaton SPD Series has elevated the features normally found within surge protective devices to the next level. Unlike many surge protectors that may have only single-colored indicators that simply indicate whether power is applied to the SPD, each SPD Series unit includes dual-colored protection status light emitting diodes (LEDs) that indicate the true status of the protection. On three-phase units, if power is removed from a phase, the unit’s protection status LEDs continue to indicate the status of the protection on that phase, not the status of the power applied to the phase. This new feature ensures that the user is supplied with accurate information concerning the status of the protection the SPD is supplying on the phase, not the status of the power applied to the phase. All units that require a neutral wire connection also contain an additional set of dual-colored LEDs that report the status of the protection in the neutralground (N-G) protection mode. Like the phase protection status LEDs, the N-G protection status LEDs also report the true status of the protection in the N-G mode. Although most SPDs on the market contain N-G mode protection, they do not monitor and indicate the status of the protection in that mode. Specifying the SPD Series’ N-G protection mode status indication feature will ensure that users are supplied with complete and accurate information concerning the SPD’s protection status.
20 kA nominal discharge current rating (In)
The entire SPD Series product offering has a nominal discharge current (In) of 20 kA, the highest achievable rating for this important parameter. This is a new rating for SPDs that is included as part of UL 1449 3rd Edition testing and certification. This rating provides an indication of the SPD’s design robustness and ability to handle a number of large-magnitude surges over a short period of time and remain operational within tested parameters. During In testing, the SPD is subjected to 15 surges of a current magnitude chosen by the SPD’s manufacturer. Valid current magnitude choices for the test are 20 kA and 10 kA for Type 1 SPDs. Valid choices for Type 2 SPDs are 20 kA, 10 kA, 5 kA and 3 kA. The 15 surges are then applied at the value chosen by the manufacturer. Prior to the start of In testing, a preliminary voltage protection rating (VPR) is measured. The VPR is the measured let-through voltage of the unit when a 6 kV, 3 kA surge is applied. This value is documented and saved as a reference. After all surges have been applied, the VPR is measured once again and compared to the value that was recorded prior to the 15-surge sequence. In order to pass the In test, the SPD must survive all 15 surges, and the measured pre- and post-VPR values must be within ±10% of each other. Choosing an SPD with an In of 20 kA ensures that your equipment is being protected by a unit that will continue to maintain a high level of surge protection performance, even after being subjected to multiple high-magnitude surges. Industry standards for lightning protection systems require the installed SPDs to have a nominal discharge current of 20kA. The 2008 edition of National Fire Protection Agency (NFPA) Standard 780, titled “Standard for the Installation of Lightning Protection Systems,” states the requirement in section 22.214.171.124.2. The 2007 edition of Underwriters Laboratories (UL) Standard 96A, titled “Installation Requirements for Lightning Protection Systems,” states the requirement in section 13.1. Choosing an SPD with an In of 20 kA will ensure that compliance with these standards can be achieved.
SPD Series catalog number configuration for units integrated into electrical distribution equipment
Example: SPD250480D2J = SPD Series, 250 kA per phase, 480D voltage, standard feature package, motor control center application