The 77C-LR is a single-phase motor and pump protection relay designed for 100-240 V ac applications with a motor full load ampere range of 1-9 A direct, eliminating the need for external CTs. It features a built-in 3-digit LED display for programming and real-time monitoring, three selectable restart options, and programmable restart delay timers. The relay provides SPDT output contacts rated at 480 VA @ 240 V ac and supports remote reset via optional kits. It is surface mount or DIN rail mountable, with dimensions of 77.47 mm H x 97.79 mm W x 128.27 mm D, and weighs 1.56 lbs. The unit operates across -20 °C to 70 °C and meets UL 508, UL 1053, CE IEC 60947-1, and CSA C22.2 standards.
The 77C-LR single-phase relay provides motor protection with input voltage from 100–240 V ac and motor full load ampere range as follows: 1.0–2.5 A (looped conductors required); 2.0–9.0 A (direct).
1-PHASE OVERLOAD RELAY/ 100-24
1-PHASE OVERLOAD RELAY/ 100-24
Industrial Relays 95-125V CROSS-WIRED ALTERNATING RELAY
| Littelfuse, Inc. | DigiKey | Quarktwin Technology Ltd. | VAST STOCK CO., LIMITED | |
|---|---|---|---|---|
| Product Category | Protective Relays and Monitoring Relays | Protective Relays and Monitoring Relays | Protective Relays and Monitoring Relays | Electromechanical Relays |
| Product Number | 77C-LR | 5666-77C-LR-ND | 77C-LR | 77C-LR |
| Product Name | Littelfuse 77C Current & Voltage Monitor Provides Exceptional Protection | Protection Relays & Systems | Protection Relays & Systems | Industrial Relays |
| Current Sensitive Relay | Over-Current Protection; Undercurrent |
