Datasheet

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39
Available Models:
Features:
• Protects three-phase motors from:
• Overcurrent
• Undercurrent
• Current unbalance
• Rapid cycling
• Single phasing
• Phase reversal
A pprovals:
520CP-115
520CP-230
520CP-460
520CP-115-RX-30
520CP-115-RX-56
Specications
The Model 520CP
is a fully-programmable, microcontroller-based,
current-sensing device designed to monitor
3-phase pumps or systems with ramp-up
times of 4 seconds or less. Applications include
submersible pumps, booster pumps, reverse
osmosis systems, centrifugal pumps, vertical
turbine pumps, oil well pumps, chemical pumps
or other similar systems.
Three external current transformers must be
utilized in conjunction with the Model 520CP.
The following nine setpoints can be set and
viewed from the 3-digit alphanumeric display:
overcurrent trip point, undercurrent trip point,
current unbalance trip point, trip delay, rapid-
cycle timer (RD1), overload restart delay (RD2),
underload restart delay (RD3), number of starts
after an overload and number of restarts after an
underload fault. Last fault diagnostic is also viewable. When a harmful condition is detected,
the MotorSaver’s output relay is deactivated after the specified trip delay. The output relay
reactivates after the appropriate RD2 or RD3 timer has expired. If the pump is started on a
single-phase or a reverse-phase condition, the Model 520CP deactivates its output relay in 0.5
second.
For model selection, the voltage designation specified is based on the control circuit voltage
of the application.
520CP-115-RX-30 - The 520CP unit has two output relays that work independently of each
other. The right relay energizes on start up and the left relay energizes on a fault after all restart
attempts are exhausted. (RD1 in minutes)
520CP-115-RX-56 - This 520CP unit has two output relays that work in unison. Unit displays
‘nc’(no current) when the current of the motor equals ‘0’ for more than 4 seconds. (RD1 in
minutes)
For more information see:
See Appendix A, page 69, Figure 12 for dimensional drawing.
See Appendix B, page 77, Figure 34 for typical wiring diagrams.
RD1 - restart delay on power-up and rapid-cycle timer
RD2 - restart delay after all faults except undercurrent
RD3 - restart delay after undercurrent
Model 520CP
3-phase current monitor, for use with motors having ramp up times of 4 seconds or less,
second relay optional on 115VAC version
Current Monitor
General Characteristics
Temperature Range ...............................0° to 70°C (32° to 158°F)
Maximum Input Power ............................5 W
Transient Protection (Internal) ......................2500V for 10 ms
Safety Marks
UL ...............................................UL508
(File #E68520)
CSA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C22.2 (File #46510)
Dimensions .......................................8.25” H x 5.25” W x 3.25” D
(209.55 x 133.35 x 82.55mm)
Weight ..........................................2.2 lbs. (35.2 oz., 997.9 g)
Mounting Method ................................Four #10 or #12 screws (3/4”-1” in length)
Options (additional cost) ..........................DPDT Relay Contacts
*Note: 50Hz will increase all delay timers by 20%
Requires external current transformers (sold separately).
Input Characteristics
Control Voltage
520CP-115 .......................................100-130VAC
520CP-230 .......................................200-250VAC
520CP-460 .......................................400-500VAC
Frequency .......................................50*/60Hz
Functional Characteristics
Maximum full scale current ........................5 Amps (max.)
Fixed Operating Point
Reverse & Single-Phase Trip Delay. . . . . . . . . . . . . . . . . .0.5 second
Trip Point Accuracy ...............................±2%
Timing Accuracy .................................±25%, ±1 second
Temperature Range ..................................
0º to 70ºC
Output Characteristics
Output Contact Rating (SPDT)
520CP
-115, 520CP-230
Pilot Duty .......................................480VA @ 240VAC
General Purpose ..................................10A
520CP-460
Pilot Duty .......................................470VA @ 600VAC
CATALOG_SYMCOM_2014.indd 39 6/10/14 11:06 AM