Datasheet > 234-P

234-P

更新时间： 2024-11-06 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).

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234-P 数据手册

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

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

Speciﬁcations are subject to change without notice.

Revised: 11/02/2022

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