Datasheet

www.symcom.com • 800-843-8848 • fax: [phone]
3
Overload Relay
Available Models:
The Model 777 / 77C
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 77C (family of products) is for
single-phase 100-240VAC applications and 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 conveyer 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, underload,
voltage and power monitoring functions in one
package. The overload relays have a 3-digit display
for viewing real-time voltage and current and for
displaying the last or active fault code (to simplify
diagnostics) when tripped for a fault condition.
The units can be used as a stand-alone product
or the communications port can be used to form
a Modbus, DeviceNet™, Profibus, or Ethernet
network to monitor up to 99 units from a PC, PLC,
or SCADA system, and for data logging through a
PC with SymCom’s Solutions software (see page 15).
The communications port can also be used for
remote monitoring (see SymCom’s remote monitors
on page 13) to improve safety for personnel by
allowing them to monitor and control motor
operation without opening the electrical cabinet.
This capability allows for a simple, cost-effective
way to meet new requirements for arc-flash safety.
For more information see:
See Appendix A, page 66, Figure 1 for dimensional
drawing.
See Appendix B, page 71, Figures 1-4 for typical
wiring diagrams.
Auxiliary Products:
• Communication Modules (see pgs. 10-12)
• RM-1000/RM-2000 (remote displays) (see
pgs. 13-14)
• Solutions Software (see pg. 15)
• Manual Remote Reset Kit (see pg. 65)
Features:
• Built-in 3-digit display for programming, real-
time info, and diagnostics
• Programmable voltage and current settings/
parameters
• Programmable restart control (automatic, semi-
automatic, or manual)
• 3 separate programmable restart delay timers
(rapid-cycle protection, motor cool down and
dry-well recovery)
• Run-hour meter (available via network or
remote displays)
• Reset pushbutton (and optional remote reset
pushbutton)
• Current/last fault indication on 3-digit display
• Last four faults (with characteristics) available
via network or remote displays
• Network communications (Modbus,
DeviceNet™, Profibus, or Ethernet)
• Optional remote displays aid compliance with
arc-flash safety regulations
• Approvals:
77C
77C-LR
777-HVR-SP
777-P2
777-LR-P2
777-HVR-P2
777-HVR-LR-P2
777-575-P2
777-MV-P2
777-575-LR-P2
777-HRG-P2
777-LR-HRG-P2
777-575-HRG-P2
777-575-LR-HRG-P2
777-FT
777-575-FT
777-TS
777-LR-TS
777-575-TS
777VA-02
777VA-03
DEMOS:
777-P2-DEMO (777-P2 Demo only)
777-P2-DEMO-1 (777-P2 demo with CIO-EN
Ethernet Module)
777-P2-DEMO-2 (777-P2 demo, CIO-EN and
RM-1000 Remote Monitor)
777-P2-DEMO-3 (777-P2 demo, CIO-EN, RM-1000 and
RM-2000 Remote Monitors)
Model 777 Product Line
single-phase and 3-phase current & voltage monitor, on-board display, optional
communications to PLC/SCADA/monitoring systems
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