UL 1449 Third Edition Three Phase Surge Suppressors
Last Updated: April 1, 2025
Description
UL 1449 Third Edition Three Phase Surge Suppressors are devices designed to protect electrical systems from voltage spikes by limiting the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold. These suppressors are specifically tailored for three-phase AC power systems, ensuring that all three phases are protected from transient overvoltages.
Working Principle
Three-phase surge suppressors operate by detecting overvoltage conditions and diverting the excess energy away from the protected equipment. They typically use components such as metal oxide varistors (MOVs) or gas discharge tubes (GDTs) to clamp the voltage to a safe level. When a surge occurs, these components change their impedance, allowing the excess voltage to be safely redirected to the ground. This mechanism is crucial for preventing damage to sensitive electrical equipment and maintaining the reliability of power systems.
Applications
Three-phase surge suppressors are commonly used in industrial and commercial settings where three-phase power systems are prevalent. Specific examples include manufacturing plants, data centers, and telecommunications facilities. In these environments, they protect critical equipment such as motors, transformers, and servers from voltage transients that could lead to costly downtime or equipment failure.
Advantages over other Three Phase Surge Suppressors
UL 1449 Third Edition surge suppressors offer enhanced safety and performance standards compared to previous editions. They are tested under more rigorous conditions, such as 3kA impulses, to ensure higher reliability and effectiveness in protecting against surges. This makes them particularly advantageous in environments where high surge currents are expected, providing a higher level of protection and compliance with updated safety standards.
Limitations
One limitation of UL 1449 Third Edition surge suppressors is that they may require more frequent maintenance and testing to ensure they continue to meet the stringent standards set by the certification. Additionally, while they offer superior protection, they might be more expensive upfront compared to older models or less advanced surge suppressors.
Considerations
When selecting a UL 1449 Third Edition Three Phase Surge Suppressor, it is important to consider the initial cost, which may be higher due to the advanced technology and rigorous testing standards. However, this cost can be offset by the reduced risk of equipment damage and downtime. Operating expenses are generally low, but regular maintenance and testing are recommended to ensure ongoing compliance and performance. Durability is typically high, but the suppressors should be inspected periodically for wear and tear, especially after significant surge events. Replacement and maintenance costs should be factored into the overall cost of ownership, as these devices may need to be replaced after a certain number of surge events or if they fail testing.
from Eaton | Power Quality
Eaton's PSPD series surge protectors are the latest and most advanced UL 1449 3rd Edition certified surge protection devices. Application of PSPD Series units throughout a facility will ensure that equipment is protected with the safest and most reliable surge protective devices available. PSPD... [See More]
- Standards: UL 1449 Third Edition
- Technology: Metal Oxide Varistor
- Mounting: Standalone
- Surge Current: 50000 to 400000
from CITEL SURGE PROTECTION
Type 2 AC Power Surge Protector. Imax: 80-200kA per phase. Protects All Modes. On Board Diagnostics: LED indicators, Audible Alarm, and Remote Contacts. EMI/RFI Noise Filtering. Sinewave Tracking. UL 1449 3rd Edition Listed. Optional Surge Counter [See More]
- Standards: UL 1449 Third Edition; UL
- Operating Temp: -40 to 185
- Mounting: Wall/Panel
- 3-Phase Configuration: Delta; Wye
from MCG SURGE PROTECTION
Features: 120LS: I peak=120,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition. NEMA LS1-1992. Three times redundant protection paths per phase. Employs new 40kA varistors with built in high-speed thermal disconnect. Solid copper bus bar construction. Field-replaceable modules. EMI/RFI noise... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from ASCO Power Technologies
Industrial computers, PLCs, and sensitive instrumentation are at the heart of today's automation systems. Maintaining reliability and uptime are essential to the processes running on the factory floor. Semiconductor technology has advanced over the last several decades increasing equipment's... [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: DIN Rail
- Surge Current: 50000
from Surge Suppression Incorporated
Advantage panel Protection Series, Nema 1, Frequency Responsive Circuitry / Voltage Response Circuitry (Sine Wave Tracking) [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; CSA Mark; UL; ISO 9001:2005
- Technology: Hybrid
- Mounting: Device Mount
- Operating Temp: 176
from CITEL SURGE PROTECTION
CITEL model DS250VG is a heavy duty AC Surge Protection Device (SPD) for high risk, low tolerance electrical service entrance applications. The DS250VG provides protection against the direct and indirect effects of lightning and is particularly useful in a high lightning area where the risk of heavy... [See More]
- Standards: UL 1449 Third Edition; CE Marking; CSA Mark; IEC; UL; EN 61643-11: Europe; NF EN 61643-11: France; DVE
- Technology: VG Technology for Maximum Performance
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
from MCG SURGE PROTECTION
Features: 120,000 amps per phase. UL1449 3rd Edition. Field-replaceable, high capability protection modules with lifetime replacement warranty. High performance, low inductance MicroZ ™ -installed cable. (Click here). Event counter and front panel LEDs for status indication. LED internal... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; CE Marking
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from ASCO Power Technologies
The SPDee Series utilizes large Block 50kA Thermal Protected MOV ’s with surge current levels of 50kA per mode. The unit is a perfect replacement to the obsolete surge arrestors. With a small, compact design and line or load side installation flexibility, this unit can be installed anywhere in... [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel (optional feature); DIN Rail (optional feature); Pipe Nipple
- Surge Current: 50000
from Surge Suppression Incorporated
Advantage panel Protection Series, Nema 1, Frequency Responsive Circuitry / Voltage Response Circuitry (Sine Wave Tracking) [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; CSA Mark; UL; ISO 9001:2005
- Technology: Hybrid
- Mounting: Device Mount
- Operating Temp: 176
from CITEL SURGE PROTECTION
CITEL model DS150E is a heavy duty AC Surge Protection Device (SPD) for high exposure applications such as direct lightning strikes, capacitor bank switching and large inductive loads. The DS150E is a single pole device that incorporated a multi-varistor circuit. It offers unmatched mechanical... [See More]
- Standards: UL 1449 Third Edition; CE Marking; CSA Mark; IEC; UL; EN 61643-11: Europe; NF EN 61643-11: France
- Technology: Metal Oxide Varistor
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
from MCG SURGE PROTECTION
Features: 120,000 amps per phase. UL1449 3rd Edition. Field-replaceable, high capability protection modules with lifetime replacement warranty. 8 Ft. installed cable. Front panel LED's for status indication. LED internal diagnostics for on-site maintenance. Audible fault alarm with mute switch. All... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from ASCO Power Technologies
With surge current levels of 100kA, 150kA, 200kA, 250kA, 300kA, 400kA and 500kA per phase, our XAL Series is the SPD that covers most current SPD needs. With one replaceable module per unit containing Large Block 50kA Thermal Protected MOV ’s, this units low cost, reliability, flexibility and... [See More]
- Standards: UL 1449 Third Edition; ANSI; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel
- Surge Current: 150000
from Surge Suppression Incorporated
Advantage panel Protection Series, Nema 1, Frequency Responsive Circuitry / Voltage Response Circuitry (Sine Wave Tracking) [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; CSA Mark; UL; ISO 9001:2005
- Technology: Hybrid
- Mounting: Device Mount
- Operating Temp: 176
from CITEL SURGE PROTECTION
CITEL model DS40 is a standard duty AC Surge Protector (SPD) used in distribution or control panel applications. The DS40 is a single pole module that can be combined with other DS40 modules or a DS40G (N-G Mode Only) module. It is configurable for all 1, 2, and 3 phase application up to 480V AC. [See More]
- Standards: UL 1449 Third Edition; CE Marking; CSA Mark; IEC; UL; EN 61643-11: Europe; NF EN 61643-11: France
- Operating Temp: -40 to 185
- Mounting: Symmetrical Rail 35 mm
- 3-Phase Configuration: Delta; Wye
from MCG SURGE PROTECTION
Features: 200,000 amps per phase. UL1449 3rd Edition. Independent lab tested modules. NEMA LS 1 Tested. Redundant modular protection withstands multiple lightning strikes. Solid copper bus bar construction for minimal impedance and enhanced current sharing. High performance, low inductance. Micro-Z... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 200000
from ASCO Power Technologies
Our largest, highest kA SPD, the XBL Series utilizes two separate, dual redundant replaceable modules that work in parallel. With Large Block 50kA Thermal Protected MOV ’s with surge current levels of 600kA, 800kA and 1000kA per phase, this unit is for those “Mission Critical ”... [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel
- Surge Current: 600000
from CITEL SURGE PROTECTION
CITEL model DS70RS is a standard duty AC Surge Protector (SPD) used in distribution or control panel applications. The DS70RS is a single pole module. It is configurable for all 1, 2, and 3 phase application up to 70kA. UL1449 3rd Edition. (UL1449 4th Edition - Type 1CA for -400, -600 *Other... [See More]
- Standards: UL 1449 Third Edition; CE Marking; CSA Mark; IEC; UL; EN 61643-11: Europe; NF EN 61643-11: France
- Technology: Metal Oxide Varistor
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
from MCG SURGE PROTECTION
Features: 200,000 amps per phase, 8x20 us. Date & time of last event it handled/diverted displayed. Independent lab tested modules. UL1449 3rd Edition. NEMA LS 1. Redundant modular protection withstands multiple lightning strikes. Solid copper bus bar construction for minimal impedance and... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 200000
from ASCO Power Technologies
The XCS Series utilizes large Block 50kA Thermal Protected MOV ’s with surge current levels of 100kA per phase. With a compact economical design and line or load side installation flexibility, this unit can be installed anywhere in any electrical distribution system. FEATURES: UL 1449 Third... [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel
- Surge Current: 100000
from CITEL SURGE PROTECTION
CITEL model DS240 surge protectors are used mainly for distribution panels of single-phase and three-phase networks. They provide common-mode protection (between the active conductors and ground) and are available with an option remote alarm. The DS240 is built with a plug-in module and a fixed... [See More]
- Standards: UL 1449 Third Edition; CE Marking; CSA Mark; IEC; UL; EN 61643-11: Europe; NF EN 61643-11: France
- Operating Temp: -40 to 185
- Mounting: Symmetrical Rail 35 mm
- 3-Phase Configuration: Delta; Wye
from MCG SURGE PROTECTION
Features: 400,000 Amps per phase 8x20 us. Date & time of last event it handled/diverted displayed. Independent lab tested modules. UL1449 3rd Edition. NEMA LS 1 Tested. High capability redundant modular protection withstands multiple lightning strikes. Solid copper bus bar construction for... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 400000
from ASCO Power Technologies
The XDS Series utilizes large Block 50kA Thermal Protected MOV ’s with surge current levels of 100kA, 150kA and 200kA per phase. With line or load side installation flexibility, this unit is a great fit from the service entrance all the way down to each distribution and/or branch panel. [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel
- Surge Current: 100000
from MCG SURGE PROTECTION
Features: I peak=120,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Triple redundant - three fused surge paths/phase. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 120000
from ASCO Power Technologies
The XRL Series utilizes uni-modular replaceable module design with Large Block 50kA Thermal Protected MOV ’s with surge current levels of 100kA, 150kA, 200kA, 250kA and 300kA per phase. FEATURES: UL 1449 Third Edition Listed. Directly Connected, Discrete Protection Elements Between All... [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: Device Mount
- Surge Current: 150000
from MCG SURGE PROTECTION
Features: I peak=160,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Triple redundant - three fused surge paths/phase. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 160000
from ASCO Power Technologies
Our highest kA internal-mount SPD, the XWL Series utilizes uni-modular replaceable module design with Large Block 50kA Thermal Protected MOV ’s with surge current levels of 300kA, 400kA, and 500kA per phase. This unit is for those “Mission Critical ” environments. FEATURES: UL 1449... [See More]
- Standards: UL 1449 Third Edition; ANSI; CE Marking; IEC; IEEE; UL; RoHS
- Technology: Metal Oxide Varistor
- Mounting: Device Mount
- Surge Current: 300000
from MCG SURGE PROTECTION
Features: I peak=250,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Triple redundant - three fused surge paths/phase. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 250000
from MCG SURGE PROTECTION
Features: I peak=40,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. Filtering standard. Thermally protected MOVs. 20 Year... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 40000
from MCG SURGE PROTECTION
Features: I peak=80,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. Filtering standard. Thermally protected MOVs. 20 Year... [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 80000