277 Three Phase Surge Suppressors
Last Updated: April 1, 2025
Description
277 Three Phase Surge Suppressors are devices designed to protect electrical systems from voltage spikes and surges. These suppressors are specifically tailored for three-phase AC power systems, which are commonly used in industrial and commercial settings. They work by diverting excess voltage away from sensitive equipment, thereby preventing potential damage.
Working Principle
Three-phase surge suppressors operate by using components such as gas discharge tubes, metal oxide varistors (MOVs), and transient voltage suppressors to manage and mitigate voltage spikes. When a surge occurs, these components work together to shunt the excess voltage away from the protected equipment, ensuring that only the appropriate voltage levels reach the devices. This is crucial in maintaining the integrity and functionality of electrical systems, as it prevents damage that could be caused by overvoltage conditions.
Applications
Three-phase surge suppressors are widely used in environments where three-phase power is prevalent. Specific applications include protecting industrial machinery, large motors, and HVAC systems. They are also essential in data centers and telecommunications facilities, where maintaining uninterrupted power supply and protecting sensitive equipment from voltage spikes is critical.
Advantages over other Three Phase Surge Suppressors
One of the advantages of using 277 Three Phase Surge Suppressors is their ability to handle higher voltage levels and provide robust protection for large-scale industrial equipment. They are designed to manage the unique challenges posed by three-phase power systems, such as phase imbalances and higher power loads, which may not be adequately addressed by single-phase surge suppressors.
Limitations
A limitation of 277 Three Phase Surge Suppressors is that they may require more complex installation and maintenance compared to single-phase suppressors. Additionally, they might not be suitable for environments where space is limited, as they can be larger and require more room for installation.
Considerations
When selecting a 277 Three Phase Surge Suppressor, it is important to consider factors such as initial costs, which can be higher due to the complexity and capacity of these devices. Operating expenses should also be evaluated, as well as the durability and lifespan of the suppressor. Regular maintenance and potential replacement costs are other considerations, as these devices need to be checked periodically to ensure they are functioning correctly and providing adequate protection.
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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from Transtector Systems, Inc.
The SP Series of AC panel surge protectors provides a full range of nominal operating voltages from 120 Vac to 600 Vac to support global AC surge protection requirements and voltages. The UL 1449 4th Edition design, uses thermally protected MOV technology to ensure robust, reliable, protection for... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120-600, 120-480 Vac
- Technology: Metal Oxide Varistor
- Mounting: DIN Rail
- Surge Current: 50000 to 100000
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]
- Voltage: 277
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel (optional feature); DIN Rail (optional feature); Pipe Nipple
- Surge Current: 50000
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]
- Voltage: 120; 220; 277; 120-127 V, 220-277 V
- 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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from Transtector Systems, Inc.
AC surge protector (also known as SPD or lightning protector) I2R-T240-4PG277 from Transtector is a DIN-Rail style SPD that utilizes state of the art MOV/GDT technology to protect critical equipment that operates on a 277 Vac 3-Phase Wye + CM electrical service. This surge protector provides... [See More]
- Voltage: 277
- Technology: Metal Oxide Varistor
- Mounting: DIN Rail
- Surge Current: 40000
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]
- Voltage: 120; 220; 277; 480; 347V-480V, 347V-480V, 347V-480V
- 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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
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]
- Voltage: 120; 220; 240; 277; 277-347 V, 220-240 V, 120-127 V
- Technology: Metal Oxide Varistor
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 200000
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]
- Voltage: 120; 208; 220; 240; 277
- 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, 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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 200000
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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 400000
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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 120000
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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 160000
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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- 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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- 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]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 80000