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234-P

更新时间: 2024-11-21 14:56:39
品牌 Logo 应用领域
力特 - LITTELFUSE /
页数 文件大小 规格书
3页 243K
描述
The PumpSaver? Plus Model 234-P protects single-phase pumps with an input voltage value of 230 V ac, an input load range of ?–3 hp, and an output load rating of 3 hp @ 240 V ac (17 A maximum).

234-P 数据手册

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Motor and Pump Protection Relays  
234-P Series  
Single-Phase Pump Monitor  
Description  
The PumpSaver® Plus Model 234-P protects single-phase pumps from dry-well, dead-head, rapid-cycle, jammed impellers,  
and over/undervoltage conditions. Typical applications include residential waterwells, commercial waterwells, irrigation  
wells, golf courses, and other sprinkler systems. The Model 234-P is designed to be mounted inside a Grundfos* control  
box** to protect 1⁄  
–3 hp, 2- or 3-wire, 230 V pumps. An infrared LED communicates directly with a hand-held diagnostic  
3
tool called the Informer (sold separately).  
A calibration adjustment allows the 234-P to be calibrated to your specific pumping applications, reducing the possibility  
of false or nuisance tripping. A unique microcontroller-based voltage and current-sensing circuit constantly monitors the  
incoming power for fluctuations, overcurrent, and undercurrent. When an abnormality such as loss of suction is detected,  
the 234-P deactivates its output relay and directly disconnects the pump motor. The 234-P then begins its user-selectable  
restart delay (dry-well recovery) timer. When the timer counts to zero or power is removed and reapplied, the 234-P  
reactivates its output relay and turns the pump back on. By leaving the restart delay knob in the reset position, the 234-P  
will operate in manual reset mode.  
The Informer displays parameters including calibration points, trip points, run time and last faults. An IR Kit-12 (12” fiber  
optic kit) allows the Informer to access these parameters even when the 234-P is enclosed in a control box. This is valuable  
for troubleshooting the pump while it is running.  
NOTE: The PumpSaver® models have a sensitivity adjustment for the dry-well trip point. After calibration is done, you can adjust the sensitivity for the dry-well/dead-head trip point  
from 70 % - 90 % of the full load. This makes the unit even more adaptable to varying pumping applications. If you have a very low producing well, increase the sensitivity closer to the  
90 % mark, or if you have a very heavy producing well, decrease the sensitivity around the 70 % mark.  
* Grundfos is a trademark of its respective owner.  
**The Model 234-P is not recommended for use with the Grundfos Deluxe Control Box.  
Features & Benefits  
FEATURES  
BENEFITS  
Constant monitoring of voltage and current protects pumps from  
fault conditions  
Proprietary microcontroller-based circuitry  
Allows user to adjust the current sensitivity for the dry-well/dead-  
head trip point from 70 %–90 % of the full load  
Onboard sensitivity adjustment  
Adjustable restart delay  
Allows user to select well recovery time delay after a dry-well  
condition occurs, or to select manual reset  
Used with the Informer, allows user to see stored faults, run time,  
and also troubleshoot the pump while it’s running  
Built-in IR communications link  
LED indication  
Provides status and diagnostics for troubleshooting  
Littelfuse.com/234-P  
©2022 Littelfuse, Inc.  
Specifications are subject to change without notice.  
Revised: 11/02/2022  
1 of 3  

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