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 200-480VAC 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
trip is required.
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.
Wiring Diagram
TYPICAL WIRING DIAGRAM
MODEL
777
TYPICAL WIRING DIAGRAM FOR
FOR MODEL
777 (2 to 90 amps)
(20 TO 90 amps)
Features & Benefits
FEATURES
CURRENT TRANSFORMER WIRING DIAGRAM FOR MODEL 777
(80 to 800 amps)
BENEFITS
Visual indication for programming, viewing real-time
voltage or current, and last fault code
Allows usage on wide range of systems
Choose from automatic, semi-automatic, or manual to
best meet individual application needs
Program separate restart delay time for rapid cycle
protection, motor cool down, and dry-well recovery
Increases safety through remote display of real-time
data and fault history, without the need to open the
cabinet. Aids with arc flash safety regulations
Reset can be done through pushbutton on relay or
remotely with optional 777-MRSW or OL-RESET
remote reset kit
Compatible with Modbus, DeviceNet™, Profibus, or
Ethernet using optional communications module
Built-in display
Programmable voltage
and current settings
3 selectable
restart options
3 programmable restart
delay timers
LITTELFUSE RECOMMENDS
USING CTs WITH TERMINALS TO
SIMPLIFY INSTALLATION.
Remote display
compatibility
12 - 16 AWG
STRANDED
WIRE
Flexible reset
Network
communications
capability
Ordering Information
See next page.
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/777
www.littelfuse.com/
Rev: 1-A-062816
Protection Relays
Motor and Pump Protection - 3-Phase Motor Protection
777 SERIES
Ordering Information
MODEL
LINE VOLTAGE
MOTOR FULL
AMP RANGE
DESCRIPTION
777-P2
777-LR-P2
777-HVR-P2
777-HVR-LR-P2
777-575-P2
777-575-LR-P2
200-480VAC
200-480VAC
340-480VAC
340-480VAC
500-600VAC
500-600VAC
2-800A (external CTs
required above 90A)
1-800A (external CTs
required above 9A)
2-800A (external CTs
required above 90A)
1-800A (external CTs
required above 9A)
2-800A (external CTs
required above 90A)
1-800A (external CTs
required above 9A)
10-800A with
external CTs
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts
Protects low range motors when wired directly or with 10-800 FLA with use of external CTs
Provides low and high power trip*, linear overcurrent trip, and 470VA @ 600VAC output SPDT
relay contacts. Required when a control power transformer (CPT) is not used with a 480V system
Provides low and high power trip*, linear overcurrent trip, and 470VA @ 600VAC output SPDT
relay contacts. Required when a control power transformer (CPT) is not used with a 480V system
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts. Used in Canada and NE USA where 575V utility power services are common
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts. Used in Canada and NE USA where 575V utility power services are common
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts. Designed for Medium Voltage applications where both PTs and CTs are used. Has
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 480VA @ 240VAC output SPDT
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
777-MV-P2
100-240VAC
777-HRG-P2
777-LR-HRG-P2
200-480VAC
200-480VAC
2-90A only
10-800A (external CTs Overload relays designed for high resistance grounding systems that incorporate an external
required, external
zero-sequence CTs that correspond with the built in multipliers to detect ground faults
2-90A only
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts. Used in Canada and NE USA where 575V utility power services are common.
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 480VA @ 240VAC output SPDT
relay contacts. Used in Canada and NE USA where 575V utility power services are common.
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 480VA @ 240VAC 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 500ms - 70 seconds. Low trip delay is ideal in chain drive and drive
linkage applications to prevent breaking in overload or jam situations. Other applications include
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
Provides 480VA @ 240VAC output SPDT relay contacts. For use with Subtrol
®
equipped Franklin
submersible motors to detect high motor temperatures
Provides 480VA @ 240VAC output SPDT relay contacts. For use with Subtrol
®
equipped Franklin
submersible motors to detect high motor temperatures
Provides 480VA @ 240VAC output SPDT relay contacts. For use with Subtrol
®
equipped Franklin
submersible motors with nominal 500-600VAC range to detect high motor temperatures
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts. Has restart delay 1 setpoints of 2-500 minutes and undercurrent trip delay
setpoints of 2-60 minutes.
Provides low and high power trip*, linear overcurrent trip, and 480VA @ 240VAC output SPDT
relay contacts. For use with static and rotary single to 3-phase converters. High and low
voltage trip feature only applies to the utility supplied power. Works well with unloaded phase
converters because the relay ignores severely unbalanced voltages
777-575-HRG-P2
500-600VAC
777-575-LR-HRG-P2
500-600VAC
10-800A with
external CTs
777-FT
200-480VAC
2-800A (external CTs
required above 90A)
777-TS
777-LR-TS
777-575-TS
777VA-02
200-480VAC
200-480VAC
500-600VAC
200-480VAC
2-800A (external CTs
required above 90A)
1-9A only
2-800A (external CTs
required above 90A)
2-800A (external CTs
required above 90A)
2-800A (external CTs
required above 90A)
777VA-03
200-480VAC
* Network programmable only
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/777
www.littelfuse.com/
Rev: 1-A-062816
Protection Relays
Motor and Pump Protection - 3-Phase Motor Protection
777 SERIES
Accessories
RS485MS-2W Communication Module
(for limited Modbus capabilities)
Required to
enable the Modbus communications function on
Model 77X-type products.
CIO-MB/CIO-120-MB Communication Module
Modbus-RTU interfaces capable of providing
discrete control and monitoring of an overload
relay over a Modbus network.
CIO-DN-P/CIO-120-DN-P
Communication Module
DeviceNet™ interfaces capable of providing
discrete control and monitoring of motor
starters, drives and other devices over a
DeviceNet™ network.
CIO-777-PR Communication Module
Profibus interface capable of providing discrete
control and monitoring of motor starters, drives
and other devices over a Profibus network.
CIO-EN (non-POE) Communication Module
Modbus-TCP and Modbus-RTU interface capable
of providing discrete control and monitoring of an
overload relay over a Modbus network.
Communication Adapters
• RS485-RS232–Converter with cable & plug
• RS485-USB–Converter with cable & plug
• RS232-USB–Converter
Specifications match industry standard.
RM1000 Remote Monitor
The RM1000/777 motor management system
combines unsurpassed electronic motor
protection and critical, user-friendly, motor
monitoring for up to 16 devices.
RM2000 Remote Monitor
The RM2000/777 motor management system
combines unsurpassed electronic motor
protection and critical, user-friendly, motor
monitoring with event storage and real-time
clock for date and time stamp.
Solutions Software: Solutions-M
Software features include data logging, real-time
data monitoring and fault and event monitoring.
777-MRSW Manual Remote Reset Kit
Allows the 777 line of MotorSaver
®
and
PumpSaver
®
products to be manually reset
without opening the panel door.
OL-RESET Manual Remote Reset Kit
Allows the 777 line of MotorSaver
®
and
PumpSaver
®
products to be manually reset
without opening the panel door.
Specifications
Functional Characteristics
Frequency
TC- Overcurrent Trip Class
(777 Plus Series units)
TC- Overcurrent Trip Class
(77C, 777 non-Plus
Series units)
Output Characteristics
Output Contact Rating
(SPDT - Form C)
Pilot duty rating
General purpose
Pilot duty rating for
HVR models
General Characteristics
Ambient Temperature Range
Operating
Storage
Accuracy
Voltage
Current
GF Current
Timing (777 Plus Series units)
Timing (77C, 777 non-Plus
Series units)
Repeatability
Voltage
Current
Maximum Input Power
Pollution Degree
Class of Protection
Relative Humidity
Terminal Torque
Standards Passed
Electrostatic Discharge (ESD)
Radio Frequency Immunity
(RFI), Conducted
Radio Frequency Immunity
(RFI), Radiated
Fast Transient Burst
Short Circuit
Surge
IEC
ANSI/IEEE
Hi-potential Test
Vibration
Shock
Safety Marks
UL
CE
CSA
Maximum Conductor Size
(with insulation) through
777/77C
Dimensions
Weight
Mounting Method
50/60Hz
02-60, J02-J60, L00-L60 or Off
5, 10, 15, 20, 30
(J prefix enables jam protection feature)
480VA @ 240VAC, B300
10A @ 240VAC
470VA @ 600VAC, B600
-20° to 70°C (-4° to 158°F)
-40° to 80°C (-40° to 176°F)
±1%
±3%(<100 amps direct)
±15%
±0.5 second
5% +1 second
±0.5% of nominal voltage
±1% (<100 amps direct)
10 W
3
IP20
10-95%, non-condensing per IEC 68-2-3
7 in.-lbs.
IEC 61000-4-2, Level 3, 6kV contact, 8kV air
IEC 61000-4-6, Level 3 10V/m
IEC 61000-4-3, Level 3 10V/m
IEC 61000-4-4, Level 3, 3.5kV input power
100kA
61000-4-5, Level 3, 2kV line-to-line;
Level 4, 4kV line-to-ground
C62.41 Surge and Ring Wave Compliance to a
level of 6kV line-to-line
Meets UL508 (2 x rated V +1000V for 1 minute)
IEC 68-2-6, 10-55Hz, 1mm peak-to-peak,
2 hours, 3 axis
IEC 68-2-27, 30g, 3 axis, 11ms duration,
half-sine pulse
UL508, UL1053 (File #E68520)
IEC 60947-1, IEC 60947-5-1
C22.2
0.65”
H
77.47 mm (3.05”);
W
97.79 mm (3.85”);
D
128.27 mm (5.05”)
1.56 lbs. (24.96 oz., 707.6 g)
Surface mount (4 - #8 screws) or DIN rail mount
Rev: 1-A-062816
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/777
www.littelfuse.com/
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