Emerson 7ACTB manual Testing & Service, Trouble-Shooting Checks, Maintenance Handle

Page 7

TESTING & SERVICE (continued)

TROUBLE-SHOOTING

Note any optional accessories that may be furnished on the ACTB and review their operation. Refer to any sepa- rate drawings and/or instructions that may be packed with the ACTB.

Table 2-1. Trouble-Shooting Checks.

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!

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.

 

 

 

 

 

Failure to Synchronize

Conditions of Normal or

Emergency Sources not suitable for closed transition transfer.

light comes on.

Recheck voltage and frequency of both sources. Press Alarm Reset pushbutton.

 

 

Extended Parallel Time

CN and CE contacts are closed longer than setting in the Control Panel. Open the discon-

light comes on.

nected source circuit breaker, then call your nearest ASCO Service Center for assistance.

 

 

TS Locked Out

Transfer lockout operation has occured; transfer switch is disabled from automatic operation.

light comes on.

Open the disconnected source circuit breaker, then call your nearest ASI for assistance.

 

 

 

 

* These are factory settings. Refer to Controller 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 at 1–800–800–2726. Furnish the Serial No. and Catalog No. from the transfer switch nameplate.

MANUAL LOAD TRANSFER

MAINTENANCE HANDLE

This procedure manually transfers load to other source if the Transfer Switch or Control Panel are out of service.

Close enclosure doors to prevent personal injury in case of electrical system fault.

1.Be sure that the Bypass Handle is CLOSED on either Emergency or Normal (see page 3–1).

2.Be sure that the Isolation Handle is in the TEST or ISOLATE position (see page 3–2).

3.Turn the Bypass Handle counterclockwise to OPEN the Bypass Switch. Then Bypass to the other source (see page 3–1).

Bypass and isolate the Transfer Switch before using the maintenance handle! See pages 3–1 and 3–2. Remove the hub and handle after using them and store on frame.

Turn counterclockwise to OPEN contacts.

Turn clockwise to

 

Grasp

CLOSE contacts.

 

handle

slide hub

insert

firmly

 

handle

 

onto shaft

 

into hole

 

& insert pin

 

 

 

Pull out shaft to operate

Push in shaft to operate

Emergency contacts.

Normal contacts.

2--2

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Contents 1200 Rating LabelNameplate Catalog Number IdentificationSupporting foundation and mounting InstallationRemove three Shipping Angles From the Transfer Switch Remove the Shipping SkidInstallation Functional Test Use extreme caution when using a meterVoltage Checks Electrical Operation Turn and hold Transfer Control switch clockwise to TransferTransfer Test Testing & ServicePreventive Maintenance Disconnecting the ControllerMaintenance Handle Testing & ServiceTrouble-Shooting Checks TROUBLE-SHOOTINGPull out Bypassing & IsolatingPush Bypass Handle Turn it ClockwiseIsolating the ATS Turn crank Counter Clockwise Until Window ShowsTurn crank clockwise until window shows Conn connected Turn crank Clockwise Until Window ShowsInterlock prevents incorrect operation Bypass Handle Turn it Counter ClockwiseYou can only bypass to the same source That the ATS is connected. SolenoidSee Controller User’s Guide Index

7ACTB specifications

The Emerson 7ACTB is an advanced electronic device designed to optimize and streamline temperature and pressure monitoring in various industrial applications. Leveraging state-of-the-art technologies, the 7ACTB stands out for its precision, reliability, and ease of use.

One of the main features of the Emerson 7ACTB is its dual-channel capability, allowing simultaneous monitoring of two separate points. This flexibility makes it particularly useful in processes where multiple temperature or pressure readings are necessary for effective control and management. The device is equipped with high-resolution sensors that ensure accurate readings, minimizing the risk of errors that can lead to inefficiencies or safety concerns.

The 7ACTB utilizes cutting-edge communication protocols, including Modbus and HART, which facilitate easy integration with existing control systems. This enhances connectivity and ensures seamless data transfer between the device and central monitoring systems, allowing operators to make quick and informed decisions.

In terms of display, the Emerson 7ACTB features an intuitive user interface with a high-definition LCD screen that presents real-time data clearly and concisely. The menu navigation is straightforward, making it accessible for personnel with varying levels of technical expertise. Users can easily configure settings, calibrate the sensors, and review historical data logs, which are crucial for auditing purposes and troubleshooting.

Another significant characteristic of the Emerson 7ACTB is its robust construction, designed to withstand harsh industrial environments. Its housing is built with durable materials that offer protection against dust, moisture, and extreme temperatures, ensuring the device operates effectively in challenging conditions.

Furthermore, the device boasts advanced diagnostic capabilities, enabling proactive maintenance checks. This feature allows users to identify potential issues before they escalate, reducing downtime and maintenance costs.

The Emerson 7ACTB also adheres to rigorous safety and regulatory standards, making it compliant with industry requirements. Its reliability and performance have made it a preferred choice among engineers and operators looking to enhance process efficiency while maintaining safety and compliance.

In summary, the Emerson 7ACTB combines precision measurement, advanced technology, and robust design, making it an essential tool for effective temperature and pressure monitoring in various industrial settings.
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