The 777-HVR-SP is a single-phase motor and pump protection relay designed for 340-480 V ac applications, protecting motors with full load currents from 2 to 800 A using external current transformers above 90 A. It features a 470 VA @ 600 V ac pilot duty SPDT relay output, a built-in 3-digit LED display for programming and diagnostics, and supports remote monitoring via communication modules. The device operates within an ambient temperature range of -20 °C to 70 °C, mounts via surface mount or DIN rail, and complies with UL 508, UL 1053, IEC 60947-1, IEC 60947-5-1, and CSA C22.2. Its dimensions are 77.47 mm H × 97.79 mm W × 128.27 mm D, and it weighs 707.6 g.
The 777-HVR-SP single-phase relay provides motor protection with input voltage from 340–480 V ac and motor full load ampere range as follows: 2–25 A (looped conductors required); 26–90 A (direct); 80–800 A (external CTs required).
1-PHASE OVERLOAD RELAY/ 380-48
Industrial Relays 1-PHASE OVERLOAD RELAY/ 380-48
1-PHASE OVERLOAD RELAY/ 380-48
| Littelfuse, Inc. | DigiKey | VAST STOCK CO., LIMITED | Quarktwin Technology Ltd. | |
|---|---|---|---|---|
| Product Category | Protective Relays and Monitoring Relays | Protective Relays and Monitoring Relays | Electromechanical Relays | Protective Relays and Monitoring Relays |
| Product Number | 777-HVR-SP | 5666-777-HVR-SP-ND | 777-HVR-SP | 777-HVR-SP |
| Product Name | Littelfuse 77C Current & Voltage Monitor Provides Exceptional Protection | Protection Relays & Systems | Industrial Relays | Protection Relays & Systems |
| Current Sensitive Relay | Undercurrent |
