SECTION 3 BYPASSING & ISOLATING

BYPASSING THE ATS*

This procedure explains how to Bypass the closed automatic transfer switch contacts. Bypassing is required before the ATS can be tested or isolated. The Bypass Handle must be in the OPEN position (green indicator) and the Isolation Handle must be in the CLOSED position (window). See Figures 3–1, 3–2, and 3–3.

Indicator shows:

green ● OPEN when the ATS is not bypassed.

To Bypass Normal push in handle all the way & turn it clockwise.*

You can only bypass to the same source that the Transfer Switch is connected.

Solenoid interlock prevents incorrect operation.

1.Observe which Transfer Switch Connected To light is on (Normal or Emergency) on the door. This is the position of the automatic transfer switch.

2.Bypass to the same source as connected to transfer switch as follows (select Normal or Emergency).

Indicator shows:

yellow ● EMERGENCY CLOSED

when ATS is bypassed to Emergency or

yellow ● NORMAL CLOSED when ATS is bypassed to Normal Source.

To Bypass Emergency pull out han- dle all the way & turn it clockwise.*

Figure 3–1. Bypass Handle and position indicators.

To Bypass Normal Source*

(Load connected to Normal Source)

The Transfer Switch Connected To Normal light is on and Transfer Switch Connected To Emergency light is off.

Push in* the Bypass Handle all the way, then turn it clockwise until Bypass Switch Position shows CLOSED on NORMAL (yellow indicator). The red light Unit Not In Automatic will flash.

Push in

Bypass Switch

E

Bypass

 

 

Handle

 

 

&

 

 

turn it

 

 

clockwise.

 

L

 

 

 

 

N

 

ATS

 

Figure 3–2. Bypass to Normal.

To Bypass Emergency Source*

(Load connected to Emergency Source)

The Transfer Switch Connected To Emergency light is on and Transfer Switch Connected To Normal light is off.

Pull out* the Bypass Handle all the way, then turn it clockwise until Bypass Switch Position shows CLOSED on EMERGENCY (yellow indicator). The red light Unit Not In Automatic will flash.

Pull out

Bypass Switch

E

Bypass

 

 

Handle

 

 

&

 

 

turn it

 

 

clockwise.

 

L

 

 

N

 

ATS

 

Figure 3–3. Bypass to Emergency.

The automatic transfer switch can now be put in the TEST or OPEN position. See ISOLATING on page 3–2.

*NOTE: When Accessory 66A (reversed Normal & Emergency connections) is specified, the handle push–pull operation is reversed. Follow instructions on the door.

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Emerson 7ACTB manual Bypassing & Isolating, Push, Bypass Handle Turn it Clockwise, Pull out, Bypassing the ATS
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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.

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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.

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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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