Beaudrey - Electrical Control Cabinets for Automatic Operation

There are essentially two distinct parts:

1. The control and display system
2. The motor control center for power

Control can be achieved using one of the following systems:

• All relay: this is suited for very simple plants and little available specialist maintenance.
• Local PLC: this is well suited to most cases. Care must be taken to shelter the PLC from high temperatures.

The choice of makes and types of PLC is large and prices soar when sophistication increases. Such sophistication is generally not necessary in the case of screens. BEAUDREY can help you limit your costs.

• DCS control: this avoids using a local PLC in most cases. The cost of the control hardware is reduced but owing to possible misunderstanding between the DCS programmer and our requirements, the duration and cost of commissioning may be high.

BEAUDREY can either supply control cabinets that included the power control in a separate compartment or the MCC in a separate cabinet.

The size and the cost of the MCC depends very much on the customer’s electrical specification (fixed circuit breakers or withdrawable type, etc.).

The variable frequency drives for the motors are generally part of the MCC.

As for the control part, BEAUDREY can assist in specifying the minimum, necessary equipment.

Screening plants are opened to wind, rain, sea-spray, burning sun and sand. While the cabinet enclosure can be chosen to resist these conditions when locked, there are many days in the year when it is totally unsafe to work in the cabinet.

Whenever possible, cabinets should be in a safe, climate-controlled building.