Brand: Hunter Industries SKU: PSR52
Product Overview
The Hunter PSR-52 is a double-pole, single-throw pump start relay that allows a compatible 24 VAC irrigation controller or supported decoder system to activate an external irrigation pump. The Big Frog Supply SKU is stored as PSR52. The controller energizes the relay’s 24 VAC coil, and the contactor then switches the separate high-voltage pump circuit without placing the motor load directly on the controller.
Hunter lists the PSR-52 for single-phase pumps up to 3 HP at 120 VAC or 7.5 HP at 230 VAC. The published maximum full-load rating is 40 amps, with a maximum resistive rating of 50 amps. Final selection must also account for the pump motor’s voltage, phase, full-load current, starting current, conductor sizing, disconnecting equipment, and applicable electrical codes.
The outdoor enclosure includes 24 VAC flying leads for the controller connection and conduit knockouts for field wiring. Hunter recommends installing the relay at least 15 feet from the irrigation controller to reduce electrical noise that could travel through the low-voltage control wiring.
Key Features
- Double-pole, single-throw pump start relay
- 24 VAC controller coil with flying leads
- For compatible 120 VAC single-phase pumps up to 3 HP
- For compatible 230 VAC single-phase pumps up to 7.5 HP
- Maximum full-load rating of 40 amps
- Maximum resistive rating of 50 amps
- Suitable for supported conventional or two-wire decoder activation
- Outdoor-rated IP44 enclosure
Common Uses
- Irrigation well-pump control
- Booster-pump activation
- Pond, creek, cistern, or storage-tank irrigation systems
- Replacing a matching Hunter PSR-52 relay
Compatibility and Installation Notes
- Verify pump voltage, phase, horsepower, full-load current, and starting current before ordering.
- Confirm the controller or decoder output is compatible with the 24 VAC relay coil.
- Mount at least 15 feet from the irrigation controller unless current Hunter instructions specify otherwise.
- Do not connect the pump motor directly to the irrigation controller.
- High-voltage wiring and installation should be completed by a licensed electrician in accordance with applicable codes.
Frequently Asked Questions
Can the PSR-52 operate a three-phase pump?
No three-phase horsepower rating is published for PSR-52. The PSR-53 is the Hunter model in this family with a published 230 VAC three-phase rating.
Does it include a local transformer?
No. The local-transformer and solid-state booster description applies to the separate PSR-B booster, not the PSR-52.
Is horsepower the only sizing requirement?
No. Confirm motor nameplate amps, starting current, voltage, phase, wiring, and local code requirements.
Why Buy from Big Frog Supply?
Big Frog Supply carries Hunter pump start relays, irrigation controllers, decoder accessories, sensors, valves, and pump-control components.
