Features
• Digital programmability permits
precise customization.
• Sixteen setpoints can be programmed for
maximum protection.
777-KW/HP
777-LR-KW/HP
777-575-KW/HP
777-HVR-KW/HP
777-HVR-LR-KW/HP
• Last fault memory provides instant
troubleshooting diagnostics.
• Voltage, current, last 4 faults, kW, hp and
power factor are recordable when using
communications package.
Power Monitor
Motor Protection
Relay
•
Engineered
Protection
• An RS485 communication port comes
standard for use with computerized
systems using Modbus protocol.
• UL and CSA listed as an overload relay.
Applications
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.
Description
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.
Protects 3-Phase Motors
and Pumps from:
• 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
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
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
CURRENT TRANSFORMER WIRING DIAGRAM FOR
MODEL 777-KW/HP (80-800 AMPS)
TYPICAL WIRING DIAGRAM FOR
MODEL 777-KW/HP (20-90 AMPS)
& 777-LR-KW/HP (2-9 AMPS)
SYMCOM RECOMMENDS USING
CTs WITH TERMINALS TO SIMPLIFY
INSTALLATION.
L2
C
NC
DISPLAY / PROGRAM
A
G
C U
E
A B
R
C
L2-L3
LV
HV
VUB
AVG
KW
-L2
L1
E N T
L3
-L1
R
+
IND. CONT. EQ.
®
784X
L1
L2
L3
NO
C
NC
LISTED
SUITABLE 10 KA RMS, 600 VAC MAX
SYMCOM INC. 800-243-8848 RAPID CITY, SD
MODE SELECT
G
C U
E
A B
R
C
L2-L3
AVG
KW
-L2
L1
E N T
L3
-L1
G
MULT
DISPLAY / PROGRAM
R
OC
MODEL 777-KW/HP
OVERLOAD RELAY 20-90A
AV
#RU/ADDR
#RF
RD3
RD2
KWS
RD1
GF
TC
RUN
CUB
LV
LKW
HV
A
RESET/
PROGRAM
LR46510
V O LT
MULT
NO
G
AV
CUB
LKW
OC
L3
MODEL 777-KW/HP
OVERLOAD RELAY 20-90A
V O LT
L1
MODE SELECT
#RU/ADDR
#RF
RD3
RD2
KWS
RD1
GF
TC
RUN
+
VUB
IND. CONT. EQ.
®
784X
RESET/
PROGRAM
Wiring configuration based on motor amps.
LR46510
LISTED
SUITABLE 10 KA RMS, 600 VAC MAX
SYMCOM INC. 800-243-8848 RAPID CITY, SD
Overload Trip Classes
777-LR-KW/HP
777-KW/HP
External CTs
required. See
wiring diagram
for external CTs
Full Load
Amps
1-2
2-9
8 - 12
12 - 25
25 - 90
80 - 110
110 - 160
160 - 220
220 - 320
320 - 420
400 - 520
480 - 600
560 - 800
# of
# of Conductors MULT to Program
Loops through A, B and C
(CT Ratio)
2
1
2
1
0
1
2
3
3
1
2
2
0
1
1
4
5
100 (100:5)
4
5
150 (150:5)
4
5
200 (200:5)
4
5
300 (300:5)
4
5
400 (400:5)
4
5
500 (500:5)
4
5
600 (600:5)
4
5
800 (800:5)
Trip Time (Seconds)
10000
Model
1000
100
Class 30
10
Class 20
Class 15
Class 10
Class 5
1
0
100
200
300
400
500
600
700
800
900
1000
% of OC Setting
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
Advantages:
Specifications
•
Operating Points
•
Special Options
• Integrated UL Listed/CSA approved
electronic overload relay
• Greater underload sensitivity than
power factor or current monitors
• Built-in undervoltage, overvoltage
and unbalance protection
• Digitally programmable
• Remote programmability
• Digital display
• Optional remote display
• Data logging capabilities
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
0.002" (5.08)
MODE SELECT
L3
NO
MODEL 777-KW/HP
C
NC
DISPLAY / PROGRAM
OVERLOAD RELAY 20-90A
G
C U
E
A B
R
C
AVG
KW
E N T
L3
-L1
L2-L3
-L2
L1
2.280"
(57.91)
3.050"
(77.47)
+
IND. CONT. EQ.
®
784X
RESET/
PROGRAM
2.650"
(67.31)
R
#RU/ADDR
#RF
RD3
RD2
KWS
RD1
GF
TC
RUN
CUB
LV
LKW
HV
OC
VUB
MULT
L2
A
L1
G
AV
Small motors, those under 3 hp and especially fractional horsepower, exhibit
small changes in current vs. load but the change in power is large. When
larger motors are derated, run below their rated horsepower, the change in
current is small vs. load, but again, the change in power is large and linear.
Other typical applications include slower speed mixer or agitator motors up to
50 hp and beyond. These motors and others that run slower than around 3400
rpm usually have small current changes vs. load.
Dimensions for All 777-KW/HP Units
V O LT
The Model 777-KW/HP has important advantages over current monitors in
many protection applications. Any motor load that has a small or very non-linear change in current vs. load requires the use of a power monitor for underload, dry-run and dead-head protection. The change in power vs. load is more
linear for most motor loads and is greater in magnitude than the change in current in all motor loads. This is because power measurements take into account
both power factor (pf) and current.
LR46510
LISTED
SUITABLE 10 KA RMS, 600 VAC MAX
SYMCOM INC. 800-243-8848 RAPID CITY, SD
3.100" (78.74)
Magdrive and can pumps tend to be small horsepower, positive displacementtype pumps. These pumps need the high sensitivity of a power monitor to
protect them from dry-run using the underpower feature and dead-head
conditions using the underpower feature if the motor decouples from the pump
and the overpower feature if the motor does not decouple.
3.600" (91.44)
3.850" (97.79)
The built-in UL Listed/CSA approved overload, current unbalance, reversephase, single-phase and other protection features are significant benefits over
similar products. The Modbus communications capability allows this device to
be directly integrated with the SymCom RM-1000 and RM-2000 remote
displays or other remote monitoring and control equipment.
1.200"
(30.48)
777-KW/HP uses power measurements for sensitive underload protection,
while using current measurements for UL listed overload protection.
5.050"
(128.27)
Current
Power
Full Load
4.700"
(119.38)
Current is not linear, low
sensitivity for low loads
and high sensitivity
for high loads.
Power is Linear, equal
sensitivity at both
low and high
loads.
No Load
0.650" (16.51)
200-480 VAC 3Ø
50/60 HZ
No Load
Full Load
3.600" (91.44)
3.850" (97.79)
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
Electrical
Input Voltage Ranges and Low and High Voltage Setpoints
777-KW/HP
Low Setpoint (LV)
170-HV Setting
Nominal Voltage Range
200-480 VAC
High Setpoint (HV)
LV Setting - 528
340-HV Setting
380-480 VAC
LV Setting - 528
450-HV Setting
480-600 VAC
LV Setting - 660
Nom. Current Range
2-25A Looped
Overcurrent Setpoint (OC)
(20 to 100A)/MULT
Ground Fault Setpoint (GF)
OFF, (3 to 20A)/MULT
777-LR-KW/HP
777-HVR
777-HVR-LR
777-575
777-575-LR
Nominal Motor Full Load Current and Overcurrent Setpoint
777, 777-HVR, 777-575
777-LR, 777-HVR-LR, 777-575-LR
25-90A Direct
20 to 100A
OFF, 3-20A
80-800A Ext CTs
80-120% of CT Prim
OFF, 10-30% of CT Prim
1-2.5A Looped
1-5A
0.15-1A
2-9A Direct
2-10A
0.3-2A
Frequency
50/60 Hz
Short Circuit
100 kA
Power Consumption
10 Watts (max.)
Output Contact Rating SPDT (Form C)
All 777-XXX-XX KW/HP types except -HVR
Pilot duty rating: 480VA @ 240VAC
General purpose: 10A @ 240VAC
Max Voltage: 277VAC
777-HVR-KW/HP
Pilot duty rating: 480VA @ 600VAC
777-HVR-LR-KW/HP
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)
Safety Marks
UL
UL508, UL1053
CSA
LR46510
CE
IEC 60947-1, IEC 60947-5-1
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, Level 3, 2kV line-to-line; Level 4, 4kV line-to-ground
ANSI/IEEE
C62.41 Surge and Ring Wave Compliance to 6kV line-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
Mechanical
Dimensions
3.0"H x 5.1 " D x 3.6"W
Terminal Torque
7 in.-lb.
Enclosure Material
Polycarbonate
Weight
1.2 lbs.
Maximum Conductor Size Through 777-KW/HP
0.65" with insulation
Environmental
Temperature Range
Ambient Operating: -20° to 70° C (-4° to 158°F)
Ambient Storage: -40° to 80° C (-40° to 176°F)
Pollution Degree
3
Class of Protection
IP20, NEMA 1
Relative Humidity
Programmable
Operating
10-95%, non-condensing per IEC 68-2-3
Points
Range
LV, HV, OC, GF
See electrical specifications above
UB- Voltage Unbalance Threshold
2 - 15% or 999%
MULT- # of Loops or CT Ratio (XXX:5)
1-10 Loops or 100-800 Ratio
LP- Low Power Setting
See Power Ranges Below or 0=off
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
RD2- Restart Delay After All Faults Except Underload
(motor cool down timer)
0, 2 - 500 Seconds
2 - 500 Minutes
RD3- Restart Delay After Underload (dry-well recovery timer)
2 - 500 Minutes
#RU- Number of Restarts After Underload
0, 1, 2, 3, 4, A(Automatic)
ADDR- RS485 Address
A01- A99
#RF-Number of Restarts After All Faults Except Underload***
Low Power (LP) / Power Range Setting (PWS)
0, 1, oc1, 2, oc2, 3, oc3, 4, oc4, A, ocA
(PWS = LP Range)
NOTES: SymCom's 777-KW/HP & 777-LRKW/HP can be preprogrammed prior to installation by applying 120 VAC between the L1 and
L2 terminals.
1 = 0.01 - 0.99 KW
5 = 0.01 - 0.99 HP
2 = 1.00 - 9.95 KW
6 = 1.00 - 9.95 HP
3 = 10.0 - 99.5 KW
8 = 10.0 - 99.5 HP
4 = 100 - 650 KW
9 = 100
SymCom warrants its microcontroller based
products against defects in material or workmanship
for a period of five (5) years from the date of
manufacture. All other products manufactured by
SymCom shall be warranted against defects in
material and workmanship for a period of two (2)
years from the date of manufacture. For complete
information on warranty, liability, terms returns, and
cancellations, please refer to the SymCom Terms
and Conditions of Sale document.
- 650 HP
* 575 volt Model (MS 777-575-KW/HP)
** If J prefix is displayed in trip class setting,
jam protection is enabled.
*** If "oc" is disabled in the #RF setting, the
overcurrent will be included as a normal
fault and the relay will automatically restart
after RD2 expires, otherwise, manual reset
is required after an overcurrent fault.
11/05