346 Three Phase Surge Suppressors
Last Updated: April 1, 2025
Description
The 346 Three Phase Surge Suppressors are designed to protect electrical systems from voltage spikes and surges. These devices are specifically tailored for three-phase AC power systems, providing a safeguard against transient overvoltages that can damage equipment and disrupt operations.
Working Principle
Three-phase surge suppressors operate by diverting excess voltage away from sensitive components in an electrical system. They utilize various technologies to achieve this, such as gas discharge tubes (GDTs), metal oxide varistors (MOVs), and transient voltage suppressors (TVS). These components work together to shunt and clamp voltage transients, ensuring that only the appropriate voltage levels reach the equipment. This protection is crucial as it prevents damage from power surges, which can be caused by lightning strikes, power outages, or switching operations.
Applications
Three-phase surge suppressors are commonly used in industrial settings where large motors and heavy machinery are prevalent. For example, they are essential in manufacturing plants to protect conveyor systems and robotic arms from voltage spikes. Additionally, they are used in data centers to safeguard servers and networking equipment, ensuring uninterrupted operation and data integrity.
Advantages over other Three Phase Surge Suppressors
The 346 model may offer specific advantages such as enhanced durability and higher surge current capacity compared to other models. These features can provide better protection for critical infrastructure, reducing the risk of equipment failure and downtime.
Limitations
One limitation of three-phase surge suppressors is that they may not be effective against all types of electrical disturbances, such as those caused by electromagnetic interference (EMI) or radio frequency interference (RFI). Additionally, their performance can degrade over time, especially after repeated exposure to high-energy surges.
Considerations
When selecting a three-phase surge suppressor, it is important to consider the initial cost and the potential savings from preventing equipment damage. Operating expenses are generally low, but regular maintenance and periodic replacement are necessary to ensure continued protection. Durability and accuracy in clamping voltage levels are critical factors, as is the suppressor's ability to handle the specific surge current capacity required by the application.
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 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: 346
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel (optional feature); DIN Rail (optional feature); Pipe Nipple
- Surge Current: 50000
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 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 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 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 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