© 2016 Littelfuse Protection Relays & Controls
Protection Relays
Current Monitoring Relays and Transducers
www.littelfuse.com/cp5
Rev: 1-A-062716
CP5 SERIES
Single-phase current monitor
Wiring Diagram
Description
The CP5 Series are undercurrent monitors designed to monitor
one leg of a 3-phase system. It is commonly used as a tower
monitor on center pivot irrigation systems to detect stalled or
jammed towers to prevent over watering.
The CP5 Series has both an adjustable trip level and an
adjustable trip delay timer. When the current is sensed, the CP5
Series activates its output relay, thus starting the motor/pump.
When the current in the monitored power line falls below the
user-selectable trip point, the unit goes through a trip delay timer
and then deactivates the output relay if the monitored current
does not recover first.
Features & Benefits
FEATURES BENEFITS
Adjustable trip
level (0-5A)
Provides ability to precisely set the current trip point
for any application
Adjustable trip
delay (0-10m)
Prevents nuisance tripping due to power
line fluctuations
600V rated relay
contacts available
on CP-5-460 model
Eliminates the need for a control transformer to step
voltage down to 120 - 240V for a control circuit
Specifications
Input Characteristics
Nominal Input Voltage
CP5115 115VAC
CP5460 460VAC
Frequency 50*/60Hz
Functional Characteristics
Operating Points
Trip Level 0-5 Amps
Trip Delay 0-10 minutes
Restart 1 second
Output Characteristics
Output Contact Rating (SPDT)
Pilot Duty
CP5115 480VA @ 240VAC
CP5460 470VA @ 600VAC
General Characteristics
Terminal
Torque 7 in.-lbs.
Wire Size 12-18AWG
Safety Marks
UL UL508 (File #E68520)
Dimensions H 74.4 mm (2.93”); W 133.9 mm (5.27”);
D 74.9 mm (2.95”)
Weight 1 lb. (16 oz., 453.59 g)
Mounting Method #8 screws
*Note: 50Hz will increase all delay timers by 20%
Ordering Information
MODEL LINE VOLTAGE
CP5115 115VAC
CP5460 460VAC
