Direct-on-Line Starting Control Panel

I. Product Overview

The Direct-On-Line (DOL) starter control cabinet is a control unit specifically designed and developed by Shanghai Shenyin Pump Industry Co., Ltd. for water supply and drainage, pump control, and industrial automation systems.

Utilizing the Direct-On-Line (DOL) starting method, the unit engages the motor directly via an AC contactor. It features a simple structure, reliable control, ease of maintenance, and low cost.

It is suitable for applications involving lower power ratings, infrequent pump starts, and power grids with sufficient capacity.

Widely used in:

Constant-pressure water supply systems,

Non-negative pressure water supply equipment,

Water supply and drainage systems,

Cooling circulation systems,

Agricultural irrigation systems,

Industrial circulating water systems,

Water treatment equipment,

Firefighting pressure-stabilizing systems.

II. Product Features

Simple Structure

Employs a classic electrical control architecture; features a low failure rate and easy maintenance.

Reliable Starting

The contactor engages the motor directly; features simple control logic and rapid response.

Cost-Effective

Compared to soft-start or variable-frequency drive (VFD) cabinets, it offers lower initial costs, reduced maintenance expenses, and higher spare part compatibility.

Automatic Control

Supports various control modes, including automatic/manual start-stop, liquid level control, pressure control, and timing control.

Multi-Pump Coordination

Supports single-pump control, dual-pump alternation, three-pump linkage, and multi-pump cyclic control.

Comprehensive Protection