BYPASSING & ISOLATING (continued)

RETURN TO SERVICE

This procedure explains how to return the automatic transfer switch (ATS) to service after inspection and maintenance. Observe the Bypass Switch Position indica- tor and lights).

1.Use the two tab handles to roll the transfer switch into the enclosure (isolation contacts facing inward) until the crank bearings stop against the draw–in plates. Then push in both side rails and close the enclosure door.

tab

handles

left rail

right rail

 

Figure 3–15.Transfer switch isolated

and pulled out for inspection.

Close the enclosure door to prevent personal

injury in case of electrical system fault.

2.Turn Isolation Handle clockwise (approx. 6 turns) until the window shows TEST and TS TEST light comes on.

Bypass Switch

E

Turn crank

 

clockwise

 

until

L

window

 

shows

 

TEST.

 

 

N

Automatic Transfer Switch

 

Figure 3–16. ISOLATE to TEST position.

3---5

TS CONNECTED

Middle amber light

 

should come on.

TS TEST

 

 

TS ISOLATED

position

TEST

clockwise – draws in

window

the transfer switch

 

Figure 3–17. Isolation Handle turned to TEST.

3.The ATS can be tested now without load interruption (see page 2–1).

Solenoid interlock prevents you from closing the isolation contacts until the ATS is in the same position as the Bypass Switch.

4.Observe which Bypass Switch Position window indica- tor is yellow (NORMAL or EMERGENCY) at the Bypass Switch Handle. This indicates the source connected to the load.

5.Observe which Transfer Switch Connected To light is on (Normal or Emergency) on the door. This is the position of the Transfer Switch. If it is not in the same position as the Bypass Handle change the position of the Transfer Switch as follows:

To change the position of transfer switch

Operate to NORMAL

Operate to EMERGENCY

Turn Transfer Control

Turn Transfer Control

switch to Retransfer

switch to Transfer Test

Delay Bypass.

(hold 15 seconds).*

 

 

Connected To Normal

Connected To Emergency

light should come on.

light should comes on.

 

 

*If Feature 2B time delay is used, there will be a delay before transfer to Emergency.

NOTE: With Normal available, the automatic transfer switch will not stay in the emergency position unless Feature 3A time delay is used (at least 30 seconds).

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Image 14
Emerson 7ADTB manual Turn crank Clockwise Until Window Shows, Return to Service, Middle amber light Should come on
Page 13 Page 15

7ADTB specifications

The Emerson 7ADTB is a cutting-edge device designed primarily for temperature and pressure monitoring in industrial applications. This versatile model showcases a blend of advanced technologies that ensure high accuracy, reliability, and durability even in the most demanding environments.

One of the key features of the Emerson 7ADTB is its exceptional measurement range. Capable of handling extreme temperatures and pressures, it appeals to industries such as oil and gas, chemical processing, and pharmaceuticals. The device is engineered to maintain precise readings, ensuring optimal safety and efficiency in processes where temperature and pressure control is crucial.

A standout technology in the Emerson 7ADTB is its intelligent sensor technology. This advanced feature allows the device to self-calibrate and adapt to various conditions, minimizing human error and ensuring accurate data collection. It uses built-in diagnostics to monitor its performance continuously, providing real-time alerts for any anomalies or maintenance needs. As a result, users can implement preventive measures to avoid costly downtimes.

The device is also notable for its robust construction. Built to withstand harsh industrial environments, the Emerson 7ADTB boasts an IP67 ingress protection rating, meaning it is dust-tight and can endure immersion in water. This characteristic, combined with high-grade materials, ensures a long lifespan and reliable performance in various applications, from offshore platforms to refining facilities.

Integrating seamlessly into existing systems is another crucial aspect of the Emerson 7ADTB. It supports a variety of communication protocols, including Modbus and HART, allowing for easy integration with control systems. This compatibility facilitates real-time data monitoring and control, enabling operators to make informed decisions based on accurate and timely information.

Moreover, the user-friendly interface of the Emerson 7ADTB enhances operational efficiency. The device features an intuitive display that allows users to access data, adjust settings, and perform diagnostics with ease, reducing the learning curve for new operators.

In conclusion, the Emerson 7ADTB represents a significant advancement in temperature and pressure measurement technology. With its robust construction, intelligent sensor capabilities, and ease of integration, it meets the demands of modern industrial applications while ensuring safety, reliability, and performance. As industries continue to evolve, devices like the Emerson 7ADTB will play a pivotal role in enhancing operational efficiency and productivity.
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