Symcom 777, 777-LR, 777-575 Catalog Page

Recordable voltage,
current, last 4 faults,
KWh usage, and power
factor is available when
using communications
package.

Digitally programmable
for precise customizing.

Sixteen set points can
be programmed for
maximum protection.

Last fault memory
provides instant trouble­shooting diagnostics.

UL and cUL listed as an
overload relay.

RS485 communication
port for use with
computerized systems
using Modbus protocol.

2880 North Plaza Drive • Rapid City, SD 57702
[phone] • [phone] • FAX [phone]
www.symcominc.com • email: [e-mail]

7/04

Features

Applications

Description

The Model 777 can be used on any 3-phase motor drawing 2-800 amps. Applications include
CONVEYOR SYSTEMS, HVAC EQUIPMENT, PUMPS, SAWS, GRINDERS AND OTHER 3-PHASE
ELECTRIC MOTORS.

The Model 777 is a fully-programmable electronic overload relay. An alphanumeric LED display
provides programming and diagnostic information. Sixteen parameters can be programmed in
the Model 777:

1) Low Voltage Setpoint 9) Rapid-Cycle Timer (RD1)

2) High Voltage Setpoint 10) Fault Restart Delay (RD2 - Motor Cool-down Timer)

3) Voltage Unbalance Setpoint 11) Underload Restart Delay (RD3 - Dry Well Recovery Timer)

4) CT Size/Loop Setting 12) No. of restarts after an overload (Manual or Automatic)

5) Overcurrent Trip Point 13) RS485 Address

6) Undercurrent Trip Point 14) No. of restarts after an underload fault

7) Current Unbalance Trip Point 15) Underload Trip Delay

8) Trip Class (5, 10, 15, 20, 30) 16) Ground Fault Trip Point

Programming the Model 777 is an easy four step process: 1) Rotate the MODE SELECT
switch to the parameter to be programmed; 2) Depress and hold the RESET/PROGRAM button;

3) Rotate the DISPLAY/PROGRAM dial to the desired setting as shown in the LED display;
and 4) Release the RESET/PROGRAM button.

An RS-485 port allows the Model 777 to be connected to an RM-1000 or RM-2000 remote
monitor or directly to a computer or PLC. The RM-2000/777 motor management system
combines unsurpassed electronic motor protection and critical, user friendly motor monitoring.
SymCom's Solutions Software (sold separately) can be used to monitor and control up to 99
Model 777s from a central computer. Using Solutions Software, an operator can control motors,
view the operating parameters, and record the following operating parameters:

• Line - Line Voltages (Recordable) • Restart Delay Timers

• Line Currents (Recordable) • KWH Usage (Recordable)

• Last 4 Faults (Recordable) • Power Factor (Recordable)

Model 777
Model 777-LR
Model 777-575

Overload Relays

•

Engineered

Protection

•Overload

•Underload

•Jams

•Undervoltage

•Overvoltage

•Single phasing

•Unbalance
(voltage & current)

•Ground fault (Class II)

•Rapid cycling

•Phase reversal

•Fully programmable

•UL and cUL listed

•CE compliant

•CSA approved

•Automatic or manual
reset

•Tamper guard

•RS485 communications
port

•Surface mount or
DIN rail mount

•Alphanumeric LED
diagnostic display

•Last fault memory

•5 year warranty

•Made in USA

•Network programmable

•Ability to clear last fault

Protects 3-Phase
motors from:

Standard Features

New Features

2880 North Plaza Drive • Rapid City, SD 57702
[phone] • [phone] • FAX [phone]
www.symcominc.com • email: [e-mail]

7/04

777 • 777-LR • 777-575

Overload Relays

ABC

CONTACTOR

H1

X1

H1

X1

H1

X1

12 - 16 AWG

Stranded Wire

3 0

MOTOR

CURRENT TRANSFORMER WIRING DIAGRAM FOR MODEL 777 (80 TO 800 AMPS)

SYMCOM RECOMMENDS USING
CTs WITH TERMINALS TO SIMPLIFY
INSTALLATION.

Note: All CTs must face the same direction and all CT
secondaries must be wired identically, i.e. all X1 terminals
enter the main (round) window and returns to H1 terminal
after exiting the loop conductor window (rectangle).

Every CT secondary must make five passes through the
correspondin

g

main conductor window on the model 777.

DISPLAY / PROGRAM

L
3

-L
1

L3-L1

L

B

E

+

O

V

AVG

A
VG

T

L1-L2

L1-L2

L2-L3

L2-L3

C

N

T

C

E

A

A

G

A

V
G

AVG

R

R

U

RD2

UCTD

CUB

LV

MULT

UC
OC

HV

VUB

RD1

TC

GF
RUN

#RU / ADDR

RD3

#RF

MODE SELECT

L1 L2

L3

NO C NC

MODEL 777

OVERLOAD RELAY

DISPLAY MESSAGE

RESET/

PROGRAM

800-843-8848SYMCOM, INC. RAPID CITY, SD

Wiring configuration based on motor amps. Overload T rip Classes

777

External CTs
required. See
wiring diagram
for external
CTs

777-LR

Model

1 - 2
2 - 9

Full Load

Amps

# of

Loops

1
0

# of Conductors

through A, B and C

2
1

MULT to Program

(CT Ratio)

2
1

8 - 12
12 - 25
25 - 90

80 - 110
110 - 160
160 - 220
220 - 320
320 - 420
400 - 520
480 - 600
560 - 800

2
1
0

4
4
4
4
4
4
4
4

3
2
1

5
5
5
5
5
5
5
5

3
2
1

100 (100:5)
150 (150:5)
200 (200:5)
300 (300:5)
400 (400:5)
500 (500:5)
600 (600:5)
800 (800:5)

10000

1000

100

10

0 300 400 500

% of OC Setting

Trip Time (Seconds)

600 700 800 900 1000

Class 10

Class 30

Class 20
Class 15

Class 5

200100

1

Wiring Diagrams

•

Charts

777 Manual Remote Reset Kit

The manual remote reset allows the 777 line of
MotorSaver®and PumpSaver®products to be
manually reset without opening the panel door.
Simply connect the 9-pin adapter to the 777
communication port and mount the reset
switch in a convenient location.

RM-1000

The RM-1000 is a local display/controller with RS-485
Modbus network capabilities. Its modular design allows
for flexible, inexpensive installation yet provides robust
motor management. Plant personnel safety is also
enhanced by allowing system troubleshooting and
control without opening the starter box.

2880 North Plaza Drive • Rapid City, SD 57702
[phone] • [phone] • FAX [phone]
www.symcominc.com • email: [e-mail]

7/04

Dimensions for All 777 Units

777 • 777-LR • 777-575

Overload Relays

4.5"

4.0"

3.3"

777 Angle Mounting Bracket

777 Angle Mounting Bracket allows the 777 line of

MotorSaver®and PumpSaver®products to be mounted into

shallow panels such as the Furnas Size 1 and other low

profile panels. The angle bracket reduces the

installed depth from 5.05" to 4.25".

RS485MS-2W

The optional RS485MS-2W communications module

is required if Model 777-type products are used on a

Modbus network or with RM-1000 or RM-2000

remote displays. The communications module

provides RS-485 bus drive capabilities and optical

isolation from the overload electronics and po werline.

Accessories

•

Dimensions

RM-2000

The RM-2000 motor monitoring device used in conjunction

with SymCom’s Model 777 provides a complete motor

management system. This system provides full electronic

motor protection, historical data and critical, user-friendly

motor-monitoring information. The RM-2000 also features

a real-time clock, 2x20 backlit LCD, one upstream RS-485

Modbus communication port and is rated NEMA-3R when

mounted on a panel door.

Specifications
Model 777,
Model 777-LR &
Model 777-575

SymCom w arrants its microcontroller based
products against defects in material or workmanship
for a per iod of fiv e (5) y ears from the date of
manufacture. All other products manufactured by
SymCom shall be w arranted against def ects in
material and workmanship for a period of two (2)
years from the date of manufacture. For complete
information on w arranty, liability , ter ms retur ns,
and cancellations , please ref er to the SymCom
Terms and Conditions of Sale document.

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Input Voltage 200-480 VAC, 3Ø(Standard)

Frequency 50-60 Hz
Motor Full Load Amp Range

777, 777-575 777-LR, 777-575-LR

2-25 Amps, 3Ø (Loops Required) 1-4.5 Amps, 3Ø(Loops Required)
25-90 Amps, 3Ø(Direct) 2-9 Amps, 3Ø(Direct)

80-800 Amps, 3Ø(External CTs)
Short Circuit Rating 100kA
Power Consumption 10W (Maximum)
Output Contact Rating SPDT (Form C) Pilot duty rating: 480 VA @ 240 VAC

Expected Life

Mechanical 1 x 106 operations

Electrical 1 x 105 operations at rated load
Accuracy at 25° C (77° F)

Voltage ±1%
Current ±3%(<100 Amps Direct)
GF Current ±15%
Timing 5% ± 1 second

Repeatability

Voltage ± 0.5% of nominal voltage
Current ± 1% (<100 amps direct)

Trip Times (Those not shown have user selectable trip times.)

Ground Fault Trip Time Trip time

101%-200% of Setpoint 8 seconds ± 1 second

201%-300% of Setpoint 4 seconds ± 1 second

301%-400% of Setpoint 3 seconds ± 1 second

401% or Greater 2 seconds ± 1 second

Current Unbalance Trip Times

% Over Setpoint Trip time % Over Setpoint Trip time

1% 30 seconds 5% 6 seconds
2% 15 seconds 6% 5 seconds
3% 10 seconds 10% 3 seconds
4% 7.5 seconds 15% 2 seconds

Safety Marks

UL UL508, UL1053
CE IEC 60947-1, IEC 60947-5-1
CSA

Standards Passed

Electrostatic Discharge (ESD) IEC 1000-4-2, Level 3, 6kv contact, 8kv air
Radio Frequency Immunity (RFI), Conducted IEC 1000-4-6, Level 3 10V/m
Radio Frequency Immunity (RFI), Radiated IEC 1000-4-3, Level 3 10V/m
Fast Transient Burst IEC 1000-4-4, Level 3, 3.5 kv input power
Surge

IEC 1000-4-5

ANSI/IEEE C62.41 Surge and Ring Wave Compliance to a level of 6kv line-to-line
Hi-potential Test Meets UL508 (2 x rated V +1000V for 1 minute)
Vibration IEC 68-2-6, 10-55Hz, 1mm peak-to-peak, 2 hours, 3 axis
Shock IEC 68-2-27, 30g, 3 axis, 11ms duration, half-sine pulse

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Dimensions 3.1"H x 5.1"D x 3.9"W
Termnal Torque 7 inch•lb
Enclosure Material Polycarbonate
Weight 1.2 lbs
Maximum Conductor Size Through 777 0.65" with insulation

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Temperature Range Ambient Operating: -20° - 70° C (-4° - 158° F)

Pollution Degree 3
Class of Protection IP20, NEMA 1
Relative Humidity 10-95%, non-condensing per IEC 68-2-3

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LV- Low Voltage Threshold 170V (450V*) - HV Setting
HV- High Voltage Threshold LV Setting - 528V (660V*)
VUB- Voltage Unbalance Threshold 2 - 15% or 999
MULT- # of Conductors or CT Ratio (XXX:5) 1-10 Conductors or 100-800 Ratio
OC- Overcurrent Threshold (20 to 100A) ÷ MULT or 80 to 120% of CT Primary; LR, (2 to 10A) ÷ MULT
UC- Undercurrent Threshold (0, 10 to 98A) ÷ MULT or 40 to 100% of CT Primary; LR. (0, 1 to 9.8A) ÷ MULT
CUB- Current Unbalance Threshold 2 - 25% or 999
TC- Overcurrent Trip Class ** 5, J5, 10, J10, 15, J15, 20, J20, 30, J30
RD1- Rapid Cycle Timer 0, 2 - 500 Seconds
RD2- Restart Delay After All Faults Except Undercurrent 2 - 500 Minutes

(motor cool down timer)
RD3- Restart Delay After Undercurrent 2 - 500 Minutes

(dry well recovery timer)
#RU- Number of Restarts After Undercurrent 0, 1, 2, 3, 4, A(Automatic)
ADDR- RS485 Address A01- A99
#RF-Number of Restarts After All Faults Except Undercurrent*** 0, 1, oc1, 2, oc2, 3, oc3, 4, oc4, A, ocA
UCTD- Undercurrent Trip Delay 2 - 60 Seconds
GF- Ground Fault Current Threshold (3 to 20A) ÷ MULT or 10 to 30% of CT Primary or OFF; LR, (0.3 to 2.0A) ÷ MULT or OFF

500-600VAC for model 777-575

General purpose: 10A @ 240 VAC

Level 3, 2kv line-to-line; Level 4, 4kv line-to-ground

Ambient Storage: -40° - 80° C (-40° - 176° F)

NOTES: SymCom's 777 & 777-LR can be preprog rammed prior to installation by applying 120 VAC between the L1 and L2 terminals.
* 575 volt Model (MS 777-575)
** If J prefix is displayed in trip class setting, jam protection is enabled.
*** If "oc" is disabled in the #RF setting, the o vercurrent will be included as a nor mal fault and the relay will automatically

restart after RD2 expires,otherwise, manual reset is required after an overcurrent fault.

7/04