Symcom 777-KW/HP, 777-LR-KW/HP, 777-575-KW/HP, 777-HVR-KW/HP, 777-HVR-LR-KW/HP Catalog Page
•Digital programmability permits
precise customization.
•Sixteen setpoints can be programmed for
maximum protection.
•Last fault memory provides instant
troubleshooting diagnostics.
•Voltage, current, last 4 faults, kW, hp and
power factor are recordable when using
communications package.
• An RS485 communication port comes
standard for use with computerized
systems using Modbus protocol.
•UL and CSA listed as an overload relay.
2880 North Plaza Drive • Rapid City, SD 57702
(800) 843-8848 • (605) 348-5580 • FAX (605) 348-5685
www.symcominc.com • email:sales@symcominc.com
11/05
Features
Applications
Description
The Model 777-KW/HP can be used on ANY 3-phase motor. It has advantages over current
monitors in low speed motor applications (less than 1800 rpm), lower power applications and in
lightly loaded applications. Some examples include LOW SPEED MIXERS, CAN PUMPS, MAG
DRIVE PUMPS, FRACTIONAL HORSEPOWER PUMPS and MOTORS, SUBMERSIBLE PUMPS AND
COAL BED METHANE WELLS.
The Model 777-KW/HP is a fully-programmable motor and pump protection relay with
power-monitoring capability. Voltage, current and power measurements are displayed on the threedigit display, as well as fault information and setpoints. The display simplifies troubleshooting and
allows the user to easily and precisely configure setpoints. The Model 777-KW/HP has the
following adjustable protection features:
1) Low voltage
2) High voltage
3) Voltage unbalance
4) UL listed/CSA approved overload
5) Trip class (5, 10, 15, 20, 30)
6) Current unbalance
7) Ground fault
8) Low power
9) High power (via network only)
10) Rapid-cycle timer
11) Fault/overload restart delay
12) Underload restart delay
13) Underpower/overpower trip delay
Other user adjustable features include:
1) CT/loop multiplier so overcurrent and power setpoints can be made in actual amps, kW or hp
2) Number of restarts after faults - manual, automatic and semiautomatic options
3) Number of restarts after underload - manual, automatic and semiautomatic options
4) Network address
Adding the optional RS485MS-2W communications module activates the built-in Modbus RTU bus
capabilities. The 777-KW/HP can communicate with the SymCom RM-1000 and RM-2000 remote
display modules, PLCs, RTUs, SCADA systems, PCs and other similar control devices. Real-time
operating parameters can be gathered and setpoints can be viewed or modified via the RS-485 bus
using Modbus RTU protocol.
777-KW/HP
777-LR-KW/HP
777-575-KW/HP
777-HVR-KW/HP
777-HVR-LR-KW/HP
Power Monitor
Motor Protection
Relay
•
Engineered
Protection
• Underload (Low KW or HP)
• High power
• Overload (UL listed)
• Jams
• Undervoltage
• Overvoltage
• Single-phasing
• Unbalance (voltage & current)
• Ground fault (Class II)
• Rapid cycling
• Phase reversal
Additional Features
• Fully programmable
• UL and CSA listed
• CE marked
• Automatic or manual reset
• Tamper guard
• RS-485 communications port
• Surface or DIN rail mountable
• Alphanumeric LED
diagnostic display
• Last fault memory
• Up to 99 individually
programmable addresses
• 5-year warranty
• Made in USA
New Features
• Network programmable
• Ability to clear last fault
• Remote setup,
Diagnostics and control
• Remote data logging
Protects 3-Phase Motors
and Pumps from:
2880 North Plaza Drive • Rapid City, SD 57702
(800) 843-8848 • (605) 348-5580 • FAX (605) 348-5685
www.symcominc.com • email:sales@symcominc.com
11/05
Specifications
•
Operating Points
•
Special Options
L1 L2 L3 NO C NC
MODEL 777-KW/HP
OVERLOAD RELAY 20-90A
RESET/
PROGRAM
RD3
#RF
VUB
OC
#RU/ADDR
MULT
RD2 KWS
HV
LKW
RD1
CUB
GF
LV
TC
RUN
DISPLAY / PROGRAM
MODE SELECT
L
3
L
1
L
E
+
O
V
A
V
G
T
L
1
-
L
2
L
2
-
L
3
N
T
C
E
A
A
G
A
V
G
R
R
U
B
C
K
W
SUITABLE 10 KA RMS, 600 VAC MAX
SYMCOM INC. 800-243-8848 RAPID CITY, SD
®
IND. CONT. EQ.
LISTED
784X
LR46510
L1 L2 L3 NO C NC
MODEL 777-KW/HP
OVERLOAD RELAY 20-90A
RESET/
PROGRAM
RD3
#RF
VUB
OC
#RU/ADDR
MULT
RD2 KWS
HV
LKW
RD1
CUB
GF
LV
TC
RUN
DISPLAY / PROGRAM
MODE SELECT
L
3
L
1
L
E
+
O
V
A
V
G
T
L
1
-
L
2
L
2
L
3
N
T
C
E
A
A
G
A
V
G
R
R
U
B
C
K
W
SUITABLE 10 KA RMS, 600 VAC MAX
SYMCOM INC. 800-243-8848 RAPID CITY, SD
®
IND. CONT. EQ.
LISTED
784X
LR46510
SYMCOM RECOMMENDS USING
CTs WITH TERMINALS TO SIMPLIFY
INSTALLATION.
Wiring configuration based on motor amps. Overload T rip Classes
777-KW/HP
External CTs
required. See
wiring diagram
for external CTs
777-LR-KW/HP
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
777-KW/HP
777-LR-KW/HP
777-575-KW/HP
777-HVR-KW/HP
777-HVR-LR-KW/HP
Power Monitor/Motor Protection Relay
TYPICAL WIRING DIAGRAM FOR
MODEL 777-KW/HP (20-90 AMPS)
& 777-LR-KW/HP (2-9 AMPS)
CURRENT TRANSFORMER WIRING DIAGRAM FOR
MODEL 777-KW/HP (80-800 AMPS)
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