Protection Relays Motor and Pump Protection - 3-Phase Motor Protection 777 SERIES 3-Phase Current & Voltage Monitor Description The 777 is a fully programmable electronic overload relay designed to protect any motor drawing 2-800 full load amps (external CTs are required above 90 amps). The 777 (family of products) is for 3-phase 200-480 V ac applications, with several specialized units for other voltage ranges and unique applications. Common applications include conveyor systems, HVAC equipment, saws and grinders, fan motors, and almost any pumping application. Some unique applications include use with a Subtrol* equipped Franklin submersible motor to detect high motor temperatures and applications where a fast linear Wiring Diagram trip is required. TYPICAL WIRING DIAGRAM FOR MODEL 777 TYPICAL WIRING DIAGRAM FOR MODEL 777 (2 to 90 A) (20 TO 90 amps) All of the overload relays provide unsurpassed protection by combining overload, voltage, phase loss and reversal, voltage and current unbalance, power monitoring, and underload based on current in one package. For standalone applications, the units incorporate a 3-digit LED display that is used for programming, providing real-time operational information and displaying diagnostic codes to aid in troubleshooting a fault condition. The units also feature a communications port that can be used with communication modules listed in the 777 accessories section to form a Modbus, DeviceNet*, Profibus, or Ethernet network. Up to 99 units can be remotely monitored and controlled from a PC, PLC, or SCADA system, and data logging through a PC with the optional Solutions software. This capability allows for a simple, cost-effective way to meet new requirements for arc-flash safety. Features & Benefits FEATURES BENEFITS Visual indication for programming, viewing real-time Built-in display voltage or current, and last fault code CURRENT TRANSFORMER WIRING DIAGRAM FOR MODEL 777 (80 to 800 A) Programmable voltage Allows usage on wide range of systems and current settings 3 selectable Choose from automatic, semi-automatic, or manual restart options to best meet individual application needs 3 programmable restart Program separate restart delay time for rapid cycle delay timers protection, motor cool down, and dry-well recovery LITTELFUSE RECOMMENDS Increases safety through remote display of real-time Remote display USING CTs WITH TERMINALS TO data and fault history, without the need to open the compatibility SIMPLIFY INSTALLATION. cabinet. Aids with arc flash safety regulations Reset can be done through pushbutton on relay or 12 - 16 AWG Flexible reset remotely with optional 777-MRSW or OL-Reset STRANDED WIRE remote reset kit Network Compatible with Modbus, DeviceNet*, Profibus, or communications Ethernet using optional communications module capability Ordering Information See next page. *Subtrol and DeviceNet are trademarks of their respective owners. 2019 Littelfuse, Inc. Rev: 2-C-042619 wwwwwwwww.littelfuse.com/.littelfuse.com/.littelfuse.com/777Protection Relays Motor and Pump Protection - 3-Phase Motor Protection 777 SERIES Ordering Information MOTOR FULL MODEL LINE VOLTAGE DESCRIPTION AMP RANGE 2-800 A (external CTs Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 777-P2 200-480 V ac required above 90 A) relay contacts 1-800 A (external CTs 777-LR-P2 200-480 V ac Protects low range motors when wired directly or with 10-800 FLA with use of external CTs required above 9 A) 2-800 A (external CTs Provides low and high power trip*, linear overcurrent trip, and 470 VA 600 V ac output SPDT 777-HVR-P2 340-480 V ac required above 90 A) relay contacts. Required when a control power transformer (CPT) is not used with a 480 V system 1-800 A (external CTs Provides low and high power trip*, linear overcurrent trip, and 470 VA 600 V ac output SPDT 777-HVR-LR-P2 340-480 V ac required above 9 A) relay contacts. Required when a control power transformer (CPT) is not used with a 480 V system 2-800 A (external CTs Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 777-575-P2 500-600 V ac required above 90 A) relay contacts. Used in Canada and NE USA where 575 V utility power services are common 1-800 A (external CTs Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 777-575-LR-P2 500-600 V ac required above 9 A) relay contacts. Used in Canada and NE USA where 575 V utility power services are common Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 10-800 A with relay contacts. Designed for Medium Voltage applications where both PTs and CTs are used. Has 777-MV-P2 100-240 V ac external CTs built in multipliers for 25.5, 50.5, 100.5 CTs. The voltage unbalance, single-phase and reverse phase protection can be disabled for applications where only the PTs are used Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 777-HRG-P2 200-480 V ac 2-90 A only relay contacts. Designed for high resistance grounding systems that incorporate an external zero-sequence CT that correspond with the built in multipliers to detect ground faults 10-800 A (external Overload relays designed for high resistance grounding systems that incorporate an external 777-LR-HRG-P2 200-480 V ac CTs required, external zero-sequence CTs that correspond with the built in multipliers to detect ground faults Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT relay contacts. Used in Canada and NE USA where 575 V utility power services are common. 777-575-HRG-P2 500-600 V ac 2-90 A only Designed for high resistance grounding systems that incorporate an external zero-sequence CT that correspond with the built in multipliers to detect ground faults Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 10-800 A with relay contacts. Used in Canada and NE USA where 575 V utility power services are common. 777-575-LR-HRG-P2 500-600 V ac external CTs Designed for high resistance grounding systems that incorporate an external zero-sequence CT that correspond with the built in multipliers to detect ground faults Provides linear overcurrent trip and 480 VA 240 V ac output SPDT relay contacts. Also known as shock relay, it is designed for fast linear trip applications. Overcurrent trip delay can be set ranging from less than 500 ms - 70 seconds. Low trip delay is ideal in chain drive and drive 2-800 A (external CTs 777-FT 200-480 V ac linkage applications to prevent breaking in overload or jam situations. Other applications include required above 90 A) sewage clarifiers, mixers, augers, and conveyors. Longer trip delay is ideal for motor test panels in rewind shops. Also includes adjustable motor acceleration time and overcurrent trip delay time when the faster linear trip mode is used 2-800 A (external CTs Provides 480 VA 240 V ac output SPDT relay contacts. For use with Subtrol equipped Franklin 777-TS 200-480 V ac required above 90 A) submersible motors to detect high motor temperatures Provides 480 VA 240 V ac output SPDT relay contacts. For use with Subtrol equipped Franklin 777-LR-TS 200-480 V ac 1-9 A only submersible motors to detect high motor temperatures 2-800 A (external CTs Provides 480VA 240 V ac output SPDT relay contacts. For use with Subtrol equipped Franklin 777-575-TS 500-600 V ac required above 90 A) submersible motors with nominal 500-600 V ac range to detect high motor temperatures Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output SPDT 2-800 A (external CTs 777VA-02 200-480 V ac relay contacts. Has restart delay 1 setpoints of 2-500 minutes and undercurrent trip delay required above 90 A) setpoints of 2-60 minutes. Provides low and high power trip*, linear overcurrent trip, and 480 VA 240 V ac output 2-800 A (external CTs SPDT relay contacts. For use with static and rotary single to 3-phase converters. High and low 777VA-03 200-480 V ac required above 90 A) voltage trip feature only applies to the utility supplied power. Works well with unloaded phase converters because the relay ignores severely unbalanced voltages * Network programmable only 2019 Littelfuse, Inc. Rev: 2-C-042619 wwwwww.littelfuse.com/777.littelfuse.com/