Brand: K-Rain SKU: 1552
Product Overview
The K-Rain 1552 is a higher-capacity pump start relay with a 24 VAC control coil for compatible irrigation controllers. The controller's pump-start or master-valve output energizes the low-voltage coil, while the relay's double-pole contacts switch the pump's separate line-voltage circuit.
K-Rain rates the 1552 for compatible pump loads up to 3 horsepower at 120 VAC and up to 5 horsepower at 240 VAC. It combines a 24 VAC coil with higher-capacity 40-amp inductive and 50-amp resistive contact ratings. The control circuit and pump circuit remain electrically distinct, so the 24 VAC controller signal does not power the motor.
The Type 3R rainproof enclosure offers accessible wiring space and protected conduit entry. Before ordering, confirm that the controller can supply the relay's coil inrush and sealed demand, particularly over long control-wire runs. Verify pump phase, voltage, horsepower, full-load and starting current, conductor size, grounding, disconnect, overload protection, and circuit protection. This relay is not intended for three-phase pump switching. Installation involves hazardous voltage and should be performed by a qualified professional following K-Rain instructions and applicable codes.
Key Features
- 24 VAC, 60 Hz control coil
- Double-pole, single-throw contacts
- Up to 3 HP at 120 VAC
- Up to 5 HP at 240 VAC
- 40-amp inductive and 50-amp resistive ratings
- Rainproof Type 3R enclosure
Common Uses
- Starting a higher-capacity pump from a compatible 24 VAC controller
- Replacing an exact K-Rain 1552 relay
- Keeping pump current isolated from controller circuitry
Compatibility and Installation Notes
- Confirm the controller provides a compatible 24 VAC pump-start signal.
- Verify coil demand and voltage at the relay under load.
- Keep pump horsepower and current within listed ratings.
- This double-pole model is not for three-phase operation.
- Disconnect controller and pump power before wiring.
Frequently Asked Questions
How is the 1552 different from the 1551?
The pump-load ratings are similar, but the 1552 has a 24 VAC coil while the 1551 has a 120 VAC coil.
Can the 24V coil power the pump?
No. The coil only closes the relay contacts. The pump uses its own separately supplied 120V or 240V circuit.
Can this switch a three-phase pump?
No. Use a verified triple-pole three-phase relay such as the appropriate K-Rain model for the installation.
Why Buy This K-Rain 1552 from Big Frog Supply?
Big Frog Supply pairs the correct 24V coil information with the separate 3 HP and 5 HP motor ratings, helping customers avoid selecting by horsepower alone and overlooking controller compatibility.
Product Type Higher-capacity pump start relay
Manufacturer Part Number 1552
Control Coil 24 VAC, 60 Hz
Contact Configuration Double pole, single throw
Pump Load Rating Up to 3 HP at 120 VAC; up to 5 HP at 240 VAC
Inductive Contact Rating 40 A
Resistive Contact Rating 50 A
Coil Inrush 60 VA
Coil Sealed 7 VA, 2.3 W
Enclosure Type 3R rainproof
Three-Phase Operation No
