K-Rain 1552 3–5 HP Pump Start Relay with 24V Coil

K-Rain 1552 3–5 HP Pump Start Relay with 24V Coil

Brand: K-Rain | SKU: 1552

Product Overview

The K-Rain 1552 is a pump start relay that lets a compatible irrigation controller start a higher-capacity pump. The controller’s 24 VAC pump-start output energizes the low-voltage coil, while separate double-pole contacts switch the pump’s line-voltage circuit.

K-Rain rates this model for compatible pump loads up to 3 HP at 120 VAC or 5 HP at 240 VAC. Before ordering, confirm the controller’s coil output, pump voltage, phase, horsepower, starting and full-load current, wire run, conductor size, and required electrical protection. This relay is not intended for three-phase pump switching, and installation should be completed by a qualified professional.

Key Features

• 24 VAC control coil
• Double-pole, single-throw contacts
• Separate controller and pump circuits
• Rainproof Type 3R enclosure
• Accessible wiring space and protected conduit entry

Common Uses

• Starting a compatible pump from a 24 VAC irrigation controller
• Isolating pump current from controller circuitry
• Replacing an exact K-Rain 1552 relay

Technical Specifications

• Model: 1552
• Control Coil: 24 VAC, 60 Hz
• Switching: Double-pole, single-throw
• Maximum Motor Rating at 120 VAC: 3 HP
• Maximum Motor Rating at 240 VAC: 5 HP
• Inductive Rating: 40 A
• Resistive Rating: 50 A
• Enclosure: Type 3R rainproof

Compatibility & Installation Notes

Verify that the controller supplies a compatible 24 VAC pump-start signal and adequate coil voltage at the relay under load. Keep the pump within all listed voltage, phase, horsepower, and current ratings. Use proper disconnects, grounding, overload protection, and circuit protection. Disconnect both controller and pump power before wiring.

Frequently Asked Questions

How does the 1552 differ from the 1551?
The 1552 uses a 24 VAC coil, while the 1551 uses a 120 VAC coil.

Does the 24V coil power the pump?
No. It closes the relay contacts; the pump uses its own separate 120V or 240V circuit.

Can this relay switch a three-phase pump?
No. Use a properly rated three-pole relay designed for the installation.

Can every 5 HP pump use this relay?
No. The pump voltage, phase, current, starting characteristics, and other nameplate requirements must all fit the relay rating.

Why Buy the K-Rain 1552 Pump Start Relay?

Big Frog Supply organizes the coil voltage, separate motor ratings, contact capacity, and installation requirements so contractors and maintenance teams can compare SKU 1552 with other pump-start relays before ordering.