Emerson 7ADTB manual Table B. Trouble-Shooting Checks, Contact position indicators

Page 8

TESTING & SERVICE (continued)

TROUBLE-SHOOTING

Note any optional accessories that may be furnished on the 7ADTB and review their operation. Refer to any separate drawings and/or instructions that may be packed with the 7ADTB. See Table B.

Hazardous voltage capable of causing shock,

burns, or death is used in this switch. Do not touch the power or load terminals of the bypass switch or transfer switch!

Table B. Trouble-Shooting Checks.

PROBLEM

CHECK IN NUMERICAL SEQUENCE

1 OPERATION

2 GEN-SET

3 VOLTAGE

 

Engine–generator set does

Hold Transfer Test switch 15

Starting control must be in the

 

not start when the Transfer

seconds or the outage must

automatic position. Batteries

 

Control switch is turned and

be long enough to allow for

must be charged and

---

held in Transfer Test position

Feature 1C time delay plus

connected. Check wiring to

 

or when normal source fails.

engine cranking and starting.

engine starting contacts.

 

 

 

 

 

Transfer switch does not

Wait for Feature 2B time delay

Generator output circuit

Voltmeter should read at least

transfer the load to the

to time out.

breaker must be closed.

90% of nominal phase to

emergency source after the

 

Generator frequency must be

phase voltage between

engine–generator set starts.

 

at least 95% of nominal (57 Hz

terminals EA and EC (or EL1

 

 

for a 60 Hz system.) *

and EL2 for 2 pole switches)*

 

 

 

 

Transfer switch does not

Wait for Feature 3A time delay

 

Voltmeter should read at least

transfer the load to normal

to time out.

 

90% of nominal phase to

source when normal returns

 

---

phase voltage between

or when the Transfer Control

 

terminals NB and NC, NC and

 

 

switch is released.

 

 

NA, and NA and NB (or NL1

 

 

 

and NL2 for 2 pole switches).

 

 

 

 

Gen. does not stop after load

Wait for Feature 2E time delay

Starting control must be in the

---

retransfer to normal source.

to time out.

automatic position.

 

 

 

 

 

Load Disconnect Active light

Wait for load disconnect time

Explanation: Transfer switch in

delayed transition transfer mode.

comes on.

delay to time out.

Load disconnect time delay is adjustable from 0 to 5 min. 59 sec.

 

 

 

Load Disconnect Active light

Check load disconnect time

Explanation: Transfer switch contacts are open longer than 5

stays on longer than 6 min.

delay setting. Call ASI.

min. 59 sec (maximum setting). Load remains disconnected.

 

 

 

 

* These are factory settings. Refer to Controller’s User’s Guide.

If the problem is isolated to circuits on the controller or the transfer switch, call your local ASCO Power Technologies sales office or ASI: in the United States, call 1–800–800–2726 or in Canada call 1–888–234–2726. Furnish the Serial No., Catalog No., and Bill of Material (BOM) No. from the transfer switch nameplate.

MAINTENANCE HANDLE

Bypass and isolate the Transfer Switch before using the maintenance handle! See pages 3–1 through 3–4. Remove the maintenance handle after using it; store it inside.

1.Bypass, isolate, and withdraw the transfer switch (pages 3–1 through 3–4). Then locate and remove the maintenance handle from the clip (inside lower left side). Insert the handle onto the shaft on the left side of the operator of the transfer switch See Figures 2–1, 2–2, 2–3 and Table C.

2.Move the maintenance handle up or down as shown to manually operate the transfer switch. Operate

both upper and lower contact shafts. Observe the window indicators (right side). Remove the mainte- nance handle and store it on the lower left side.

Emergency contacts

(upper shaft)

windowcontact

indicatorsposition indicators

O is open(right side) C is closed

Normal contacts

(lower shaft)

Figure 2–1. Contact position indicators.

2--2

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Contents Table of Contents Rating LabelStandard Controls Indicators Group Controller NameplateCatalog Number Identification 600Installation SectionWhen normal source Engine Starting ContactsAuxiliary Circuits FailsObserve these lights Go off. Then put the starting Control selector switch onVoltage Checks This switch Turn and hold Transfer Control switch clockwise to TransferElectrical Operation OperateTesting & Service Replacement PartsTable B. Trouble-Shooting Checks Contact position indicators= O Normal= C Load Disconnected = OBypass Switch Bypassing & IsolatingBypassing the ATS Upper amber lightPush Bypass Handle Turn it Counter ClockwiseTurn Bypass Handle Clock WiseTurn crank Counter Clockwise Until Window Shows Isolating the ATSMiddle amber light Should be on Lower amber lightContact Inspection Tab Handles Left rail Right railMiddle amber light Should come on Return to ServiceTurn crank Clockwise Until Window Shows Conn Turn the handle clockwise Turn the handle counterclockwise Bypass Handle ClockwiseBypass Handle Counter Clockwise Index See Controller User’s Guide

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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