73

Maintenance

Maintenance

Rectifier

Procedure 20 - Float/equalize and remote equalize

Step

Action

 

 

1

Disconnect the sense leads from the rectifier, by either disconnecting a

 

quick disconnect tab TB1 on the shelf or removing the appropriate

 

system fuse. (See the “Introduction” chapter for system applications.)

2

Open the output DC breaker. The unit is ready for local adjustment.

 

 

3

The unit should provide voltage to the front panel test point terminals. If

 

it does not, cycle the AC breaker to reset the unit.

4

Momentarily hold the FLT/EQL switch to EQL for local equalize.

 

 

5

Using a voltmeter, verify and adjust the EQL potentiometer to obtain an

 

output voltage reading of 0.5 volts (see Note below) above the system

 

equalize requirement.

6

Release the FLT/EQL switch. Verify that the output voltage drops to the

 

float value plus 0.5V (see Note below).

7

Verify the HVSD level. It is recommended that it be set approximately 3 V

 

above the shutdown limit of the power system. Refer to the “Installation

 

and start-up procedure” chapter, subsection “Start-up procedure”, for the

 

verification procedure.

8

Reconnect the sense leads locally to the rectifier. Close the output DC

 

breaker. Cycle the AC breaker to reset the unit. The RFA/ON LED should

 

be green.

–end–

Note: The 0.5 volt DC extra does not apply to MPR25 rectifiers above Release 30.

25A Switch Mode RectifierNT5C06B / C Installation and User Manual

Page 73
Image 73
Emerson MPR25, MPR15 Series Maintenance Rectifier, Procedure 20 Float/equalize and remote equalize Step Action

MPR15 Series, MPR25 specifications

The Emerson MPR25 and MPR15 series are advanced pressure regulators designed for precise control and performance in various industrial applications. Known for their durability and reliability, these regulators are ideal for both gas and liquid control systems, ensuring consistent operation across a wide range of conditions.

One of the main features of the MPR series is its innovative design that utilizes a robust diaphragm mechanism. This mechanism provides a high degree of sensitivity and response time, allowing for quick adjustments and ensuring accurate pressure regulation. The regulators are available in different pressure ranges, making them versatile for various processes and systems.

The MPR25 series typically caters to applications requiring higher flow capacities. It boasts an extensive flow capacity with less pressure drop, making it suitable for demanding environments where maintaining system efficiency is crucial. This series is often used in applications such as gas distribution systems, instrumentation, and chemical processing.

On the other hand, the MPR15 series is designed for lower flow applications, providing precise pressure control in compact spaces. Despite its smaller size, it maintains excellent performance, featuring low droop characteristics that allow for consistent pressure output even with varying flow rates.

Both series incorporate advanced materials and sealing technologies to enhance their durability and resistance to harsh operating conditions. The body is commonly made from high-grade materials that ensure resistance to corrosion, allowing for longer service life and reduced maintenance needs. Additionally, the regulators feature easy-to-adjust set points, enabling operators to quickly adapt to changing process requirements.

Furthermore, the MPR25 and MPR15 series regulators are designed with safety in mind. They include built-in safety features to prevent over-pressurization, enhancing system protection and operator safety. The design also allows for easy installation and servicing, contributing to lower operational costs over time.

In summary, the Emerson MPR25 and MPR15 series pressure regulators stand out for their precision, durability, and efficiency. With their advanced diaphragm mechanism, robust construction, and user-friendly features, they meet the needs of a diverse range of industrial applications, ensuring reliable operation in every environment. Whether for high-demand or compact applications, these regulators are an excellent choice for maintaining the integrity and performance of pressure control systems.