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Littelfuse 250A 3PH Motor Saver Protection Relay 190-480V

Special Price $202.12 Regular Price $224.36
In stock
SKU
250A
The Littelfuse 250A 3PH MotorSaver Protection Relay functions between 190-480V to protect three-phase motors from electrical failure. The device track motor current closely and automatically disconnect the circuit when it detect overcurrent situations including short circuits and overloads and ground fault. The protection relay functions as an essential component for safeguarding three-phase motors across HVAC systems which contain equipment like chillers pumps and fans. The protection relay offers three key advantages through which it prevents motor damage while reducing system downtime and improving system reliability. The quick detection of electrical irregularities through this device results in long-lasting performance of essential HVAC components which creates a safer and steadier operational.
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Specifications

  • Type: MotorSaver Protection Relay
  • Input Voltage: 190-480 VAC
  • Phase: 3PH
Manufacturer Name: Littelfuse
Product Number: 250A
OEM Part Number: 250A
Product Description: 190-480Vac 3Ph Syscom Mtr Svr
Weight:1.1lbs/498.95g

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Customer Questions
What maintenance is required for the Littelfuse 250A Motor Saver Protection Relay?

Inspect wiring and terminals regularly ensuring tight connections and no overheating. Keep unit clean and dry to prevent dust accumulation affecting sensing accuracy. Periodically verify voltage settings and calibration for accurate motor protection.

What are common issues with the Littelfuse 250A Motor Saver Protection Relay?

  • Overvoltage or undervoltage trip errors during motor operation.
  • Incorrect phase detection or phase loss alarms triggering shutdown.
  • Loose wiring causing intermittent shutdowns and unexpected resets.
  • Sensor calibration drift affecting protection accuracy and stability.

Installation Steps

Step 1: Turn off power and check zero voltage for safety.

Step 2: Mount relay on din rail/panel in ventilated area.

Step 3: Connect supply and motor load terminals per wiring diagram, ensuring tight, secure connections and correct phase order.

Step 4: Set voltage range and protection operation within manufacturer limits.

Step 5: Restore power, test motor start/stop, and confirm no fault alarms or trip conditions.