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Three-Phase Pump Protection
Fully Programmable
777-KW/HP-P2 SERIES
Electronic Power Monitors
Description
The Model 777-KW/HP-P2 Series is a family of fully
programmable electronic power monitors. They are designed
to monitor and protect any 3-phase 200-480VAC motor drawing
2-800 full load amps (external CTs are required above 90 amps).
They provide unsurpassed protection from faulty voltage,
underload and overload conditions. The 777-KW/HP-P2 can be
used in a variety of 3-phase applications and features a low
power trip point (adjustable on the unit) that is desirable any
time the current vs. load characteristic is non-linear or has little
change. In general, this applies to small slow speed motors,
small centrifugal motors and fractional horsepower motors. Low
power protection can be used any time in place of undercurrent
protection. The power monitor displays voltage, current,
kilowatts and horsepower on the face of the unit. The LR version
is designed for easier installation at a lower range of 1-9 full load
amps. The HVR version is designed with a high voltage relay for
control circuits operating at 480VAC.
The 777-KW/HP-P2 Series 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 unit’s many features include enhanced trip classes beyond
the NEMA standard trip classes. The settable trip class range
is 2-60, with or without jam protection, and a secondary linear
trip delay can be set with a range of 0-60 seconds. If both trip
class and linear trip delay are set, the 777-KW/HP-P2 will follow
the faster trip time. Another feature is the automatic dry-well
recovery timer that allows the unit to automatically select a
restart delay based on the last cycle’s run time. This allows the
777-KW-HP-P2 to optimize restart delay times.
Network communications:
compatible with Modbus,
DeviceNet™, Profibus, or Ethernet using optional
communications module.
Specifications
Functional Specifications
Programmable Operating
Points (on face of the units)
LV-Low Voltage Threshold
170-524V
HV-High Voltage Threshold
172-528V
VUB-Voltage Unbalance
Threshold
2-25% or 999 (disable)
MULT-# of Conductors or
CT Ratio (xxx:5)
1-10, 100, 150, 200, 300, 400, 500, 600,
700, 800
OC-Overcurrent Threshold
(20-100A) ÷ MULT or 80-140% of CT Primary
PWS-Power Scale
1
=0.01-0.99kW
5
=0.01-1.33hp
2
=1.00-9.95kW
6
=1.34-13.3hp
3
=10.0-99.5kW
7
=13.4-133hp
4
=100-650kW
8
=134-871hp
LP-Low Power
0.01-650kW or 0.01-871hp or 0 (off);
LP setting is dependent on PWS setting.
PWS setpoint must be programmed prior to LP
or setpoint setting
Ordering Information
MODEL
LINE
VOLTAGE
MOTOR FULL
AMP RANGE
DESCRIPTION
777-KW/
HP-P2
200-480VAC
(3-phase)
2-800A
(external CTs
required
above 90A)
Provides 480VA @ 240VAC
output SPDT relay contacts
777-LR-
KW/HP-P2
200-480VAC
(3-phase)
1-800A
(external CTs
required
above 9A)
Provides 480VA @ 240VAC
output SPDT relay contacts
777-HVR-
KW/HP-P2
340-480VAC
(3-phase)
2-800A
(external CTs
required
above 90A)
Provides 470VA @ 600VAC
output SPDT relay contacts.
Required when a CPT (control
power transformer) is not used
on a 480V system. Commonly
used in pumping applications to
save the cost and extra wiring
associated with a CPT
777-MLR-
KW/HP-P2
200-480VAC
(3-phase)
0.5-21A and
40-740A with
external CTs
Provides 480VA @ 240VAC
output SPDT relay contacts.
It is wired directly without
the need to loop conductors
for 5-21 amps (under 5 amps
requires looping of conductors),
and can be used with external
CTs for 40-740 amps
