355 Series – Three-Phase Voltage Monitor Relay シリーズ - Littelfuse 355 Voltage Monitoring Relays Provide Superior Protection

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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.

特長:

  • Proprietary microcontroller-based circuitry
  • Advanced LED indication
  • Adjustable trip and restart delay settings
  • 600 V rated relay contacts available on some models

商品仕様、各種認証情報、在庫のご確認、部品のご注文は以下をご覧ください

Catalog #Input
Voltage (V)
Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)Input AC Line Frequency (Hz)Maximum Input PowerOutput Load Rating (VA)Overvoltage Reset Voltage (%)Overvoltage Trip Voltage (%)Repeat Accuracy (%)Restart Delay RangeStorage Temperature (F/C)Trip Delay RangeStockSamplesCompare
カタログ番号入力
電圧 (V)
出力
フォーム
端子タイプ取付け方式寸法重量 (ポンド / g)Input AC Line Frequency (Hz)Maximum Input PowerOutput Load Rating (VA)Overvoltage Reset Voltage (%)Overvoltage Trip Voltage (%)Repeat Accuracy (%)Restart Delay Range保管温度 (F/C)Trip Delay Range在庫サンプル比較する
355200 190 - 240 VacSPDTTorque: 7 in-lbs; Wire Size: 12 - 18 AWG#8 screws2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)0 Kg50 / 60 (50 will increase all delay timers by 20%)6Pilot Duty: 480 VA @ 240 Vac; General Purpose: 10 A or 1 hp @ 240 Vac107%110%±0.1%After a Fault or power loss: Manual; 2 - 300 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 2 - 30 s adjustable; single-Phase faults (>25%UB): 2 s確認 Order
355400 380 - 480 VacSPDTTorque: 7 in-lbs; Wire Size: 12 - 18 AWG#8 screws2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)0 Kg50 / 60 (50 will increase all delay timers by 20%)6Pilot Duty: 470 VA @ 600 Vac; General Purpose: 10 A107%110%±0.1%After a Fault or power loss: Manual; 2 - 300 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 2 - 30 s adjustable; single-Phase faults (>25%UB): 2 s確認 Order
3554005 380 - 480 VacDPDTTorque: 7 in-lbs; Wire Size: 12 - 18 AWG#8 screws2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)0 Kg50 / 60 (50 will increase all delay timers by 20%)6Pilot Duty: 470 VA @ 600 Vac; General Purpose: 10 A107%110%±0.1%After a Fault or power loss: Manual; 2 - 300 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 2 - 30 s adjustable; single-Phase faults (>25%UB): 2 s確認 Order
355600 475 - 600 VacSPDTTorque: 7 in-lbs; Wire Size: 12 - 18 AWG#8 screws2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)0 Kg50 / 60 (50 will increase all delay timers by 20%)6Pilot Duty: 470 VA @ 600 Vac; General Purpose: 10 A107%110%±0.1%After a Fault or power loss: Manual; 2 - 300 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 2 - 30 s adjustable; single-Phase faults (>25%UB): 2 s確認 Order
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