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355200 PDF预览

355200

更新时间: 2024-11-21 14:56:39
品牌 Logo 应用领域
力特 - LITTELFUSE /
页数 文件大小 规格书
3页 274K
描述
The 355 uses microcontroller technology to monitor incoming voltage and de-energize its output rel

355200 数据手册

 浏览型号355200的Datasheet PDF文件第2页浏览型号355200的Datasheet PDF文件第3页 
Voltage Monitoring Relays  
355 Series  
3-Phase Voltage/Phase Monitor  
Description  
The 355 series is a three-phase voltage monitor with adjustable trip and restart delay, adjustable voltage unbalance, and  
multiple diagnostic lights. It is ideal for heavy-duty applications that need both protection and simple user-friendly  
diagnostics. Suitable applications include pump panels, commercial HVAC, oil rigs, and many more. The 355 series uses  
microcontroller technology to monitor incoming voltage and de-energize its output relay if power problems exist. It can  
protect motors from damage caused by single-phasing, high- and low-voltage, phase reversal, and voltage unbalance.  
These relays have four diagnostic LEDs that clearly show overvoltage, undervoltage, voltage unbalance, reverse-phase, and  
normal conditions. The adjustable trip and restart settings prevent nuisance tripping due to rapidly fluctuating power line  
conditions and allow staggered start-up of multiple motors after a fault to prevent a low-voltage condition.  
Series 355 models include the 355-200, which is equipped with a heavy-duty 10 A general purpose SPDT relay. The 355-  
400 and 355-600 models are equipped with a 470 VA @ 600 V ac pilot duty SPDT relay. A high-voltage (600 V) DPDT relay  
output option is available with the 400 V model.  
Features & Benefits  
FEATURES  
BENEFITS  
Constantly monitors three-phase voltage to protect against harmful  
line conditions even before the motor is started  
Proprietary microcontroller-based circuitry  
Provides diagnostics that can be used for troubleshooting and to  
determine relay status  
Advanced LED indication  
Prevents nuisance tripping and allows staggered start-up of multiple  
motors after a fault to prevent a low-voltage condition  
Adjustable trip and restart delay settings  
600 V rated relay contacts available on some models  
Eliminates the need for a control transformer to step voltage down  
to 120–240 V for a control circuit  
Applications  
• Pump panels  
• Commercial HVAC  
• Oil rigs  
• Heavy-duty applications that need both protection and simple user-friendly diagnostics  
Littelfuse.com/355  
©2023 Littelfuse, Inc.  
Specifications are subject to change without notice.  
Revised: 07/13/2023  
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