Brand: Hunter Industries SKU: PSR-53
Product Overview
The Hunter PSR-53 is a triple-pole, single-throw pump start relay that allows a compatible 24 VAC irrigation controller or supported decoder system to activate an external irrigation pump. Unlike the two-pole PSR-22 and PSR-52 models, the PSR-53 includes a published three-phase pump rating. The controller energizes the relay’s low-voltage coil, and the contactor switches the separate high-voltage pump circuit without placing the motor load directly on the controller.
Hunter lists the PSR-53 for single-phase pumps up to 3 HP at 120 VAC or 7.5 HP at 230 VAC, and for compatible three-phase pumps up to 10 HP at 230 VAC. The published maximum full-load rating is 40 amps, with a maximum resistive rating of 50 amps. Pump horsepower alone is not sufficient for selection; confirm the motor nameplate voltage, phase, full-load current, starting current, conductor size, disconnecting means, and local electrical requirements.
The outdoor enclosure includes 24 VAC flying leads for the control connection and multiple conduit knockouts for field wiring. Hunter recommends mounting the relay at least 15 feet from the irrigation controller to reduce the possibility of electrical noise reaching the controller through the low-voltage wiring.
Key Features
- Triple-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
- For compatible 230 VAC three-phase pumps up to 10 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
- Single- or three-phase irrigation pump control
- Well and booster-pump activation
- Commercial and larger landscape irrigation systems
- Replacing a matching Hunter PSR-53 relay
Compatibility and Installation Notes
- Verify pump voltage, phase, horsepower, full-load current, and starting current before selection.
- Confirm three-phase power availability and motor compatibility where applicable.
- 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 a 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
What is the difference between PSR-52 and PSR-53?
PSR-52 is a two-pole relay for single-phase pumps. PSR-53 is a three-pole relay and includes a published 230 VAC three-phase rating up to 10 HP.
Does PSR-53 include the PSR-B booster features?
No. The local transformer and solid-state booster are features of the separate PSR-B product, not the PSR-53.
Can it be selected only by horsepower?
No. Voltage, phase, full-load current, starting current, wiring, and electrical-code requirements must also be verified.
Why Buy from Big Frog Supply?
Big Frog Supply carries Hunter pump start relays, irrigation controllers, decoder accessories, sensors, valves, and pump-control components.
