Category: Eaton

easyE4 nano programmable logic controllers core features

• Maximum flexibility, with up to 11 local expansion modules per base unit

• The 188 available inputs/outputs within a single easyE4 system provide coverage

for a broad range of applications

• A compact product with a large voltage range (DC, AC and UC)

• Base units with different voltage types can be combined as required by means of the

available expansion modules, which makes handling the easyE4 devices even more effortless

• The integrated Ethernet interface allows for a broad range of communication options

• A user-friendly programming environment with four programming languages

(ST, FBD, LD, EDP) to choose from

• Various display and visualization options, the integrated display, web server,

and Ethernet options make visualization on mobile devices possible

• The integrated micro SD card facilitates data logging and customized startup displays

• Display with three background colors (red, green, white) for visualization of

different device statuses

• Real-time clock as well as Ethernet services ensure highly precise date and time indication

• The interrupt function enables fast event recognition and rapid response times

• Communication modules available for field bus protocols such as Modbus RTU and Smartwire-DT

Think differently about effortless control

The easyE4 PLC has 12 I/O and can be expanded to a network of up to 188 I/O points,

providing the ideal solution for lighting, energy management, industrial control, irrigation,

pump control, HVAC and home automation. In whatever your application, the compact and

flexible easyE4 enables control systems that are efficient and effortless to implement.

After the easyE4 is installed, changes are easily accomplished through front panel

programming, which eliminates the need to change wiring and minimizes downtime.

Gain effortless control with the easyE4.

• Various display and visualization options, the integrated display, web server,

and Ethernet options make visualization on mobile devices possible

• The integrated micro SD card facilitates data logging and customized startup displays

• Display with three background colors (red, green, white) for visualization of

different device statuses

• Real-time clock as well as Ethernet services ensure highly precise date and time indication

• The interrupt function enables fast event recognition and rapid response times

• Communication modules available for field bus protocols such as Modbus RTU and Smartwire-DT

Design features and benefits

• Replace three components with one DirectConnect elbow arrester

• Save material costs with the DirectConnect arrester over bushing extender,

loadbreak reducing tap plug, and 200 A elbow arrester

• Reduce stocking requirements

• Shorter stacking height

• Decrease stacking height more than 50%

• Fits into smaller enclosures

• Reduces pulling force due to elimination of cantilever effect

• Easily retrofittable to existing 600 A installations

• Simply replace the bushing extender, loadbreak reducing tap plug and 200 A elbow

arrester with an adapter and a DirectConnect elbow arrester

• TOV performance

• Enhanced temporary overvoltage characteristics

• 36 kV—highest TOV in the industry

• Arresters that will survive higher AC overvoltages, reducing downtime

• Increased system reliability

• EPDM molded rubber deadfront construction

• 40+ years of experience in EPDM rubber cable accessories and 27+ years

of elbow arrester technology

• Eaton is the only separable connector manufacturer that mixes and blends its own

insulation in-house

• Eaton’s chemists maintain control of the formulation at all times

• Ease of installation

• Cuts installation time by 80% versus installing three components

• Visually can verify contact with threads, which reduces chance of cross threading

• No special training required for linemen or contractors

Standard design tests

• IEEE Std 386E separable insulated connector systems

• IEEE Std C62.11 metal oxide surge arresters for AC power circuits

Look to Eaton’s Cooper PowerE series 600 A 35 kV class DirectConnect

elbow arrester to offer wind farm customers significant cost savings and

ease of installation.

This new deadbreak design replaces three components:

bushing extender, loadbreak reducing tap plug and the traditional 200 A

elbow arrester. The DirectConnect elbow arrester is available in two design

options: VariGAP and M.O.V.E. Eaton values your trust in our experience to

engineer products that save you money.

Reliability, cost savings and ease of installation

Eaton is now combining their 40+ year track record in separable connectors

and 27 years in underground arresters to introduce the 600 A DirectConnect

elbow arrester.

Eaton offers a cost-effective design with a shorter stacking height.

With this design, you no longer have to worry about clutter or not being able to

fit your cable accessories into smaller enclosures. The DirectConnect elbow arrester

replaces three components with one and is over 50% smaller in size than the

traditional offering, cutting installation time by 80%.

Not only does this design save you money on direct material costs, but it also

reduces overall labor expenses.

The DirectConnect elbow arrester utilizes the design expertise and manufacturing

know-how that contractors, developers and owners alike have come to rely on from

Eaton. Specific for 35 kV wind farm applications, the VariGAP design option provides

enhanced temporary overvoltage (TOV) characteristics for superior MCOV performance

over time. The VariGAP design is available in 27 kV and the standard M.O.V.E. design

is available in 27 kV and 30 kV ratings. Installation is easy. Simply thread the adapter

into a standard 600 A bushing and install the DirectConnect elbow arrester onto the

bushing. The probe inside the arrester latches into the adapter.

How the ATC-900 evaluates closed or in-phase transitions

The controller software will confirm that the closed transition (CT) or

in-phase transition is enabled through the setpoints. When source

1 and source 2 are both available within voltage and frequency set

point tolerances:

• If S1 and S2 setpoints (UV/OV, UF/OF) are identical, there can be

a difference in voltage and/or frequency when transition occurs.

Also, if there is a difference in setpoints, the actual voltage and/or

frequency may be identical when the transition occurs.

• It confirms that sources are within closed or in-phase transitions

set point tolerances when:

• Voltage difference for closed transition = +/- 1 to 5%,

• There is no voltage difference setpoint for in-phase. As long

as both voltages are within voltage limits, any difference is

acceptable

• Freq. difference = +/- 0 to 0.3 Hz for closed transition

• Freq. difference = +/- 0 to 3 Hz for in-phase

• Phase angle, when the number of generators = 0. the phase

angle difference is fixed at +/- 8 degrees

• Phase angle, when the number of generators = 1 or 2. the

phase angle difference is fixed at +/- 5 degrees

• The controller attempts a closed or in-phase transition until the

sync timer (adjustable from 1 to 60 min) expires.

Synchroscope data for in-phase & closed transitions

Load voltage decay operation (open transition)

Load voltage decay utilizes the load voltage measurements to sense

back EMF that is generated when the transfer switch is in the

neutral position (electrical load disconnected). It provides a delay

in transfer in either direction if an unacceptable level is sensed

as established by a customer programmed level. The transfer will

not take place until the back EMF decays below the acceptable

programmed level. This feature has a separate setting of enabling or

disabling the operation. If disabled, the transfer switch will not delay

in the neutral position and will transfer between the sources as fast

as possible.

Time delay neutral operation (open transition)

Time delay neutral provides a time delay in the transfer switch

neutral position when both breakers/contactors are open. This delay

takes place when the load is transferred in either direction to prevent

excessive in-rush currents due to out of phase switching of large

motor loads.

Optional feature 29G: Type of operation (selectable automatic or

non-automatic)

This feature provides two door mounted selector switches marked

auto/manual and S1-trip-S2 which permits the selection of automatic

or manual operation. In manual operation, the user can manually initi

ate and electrically operate between S1. trip, or S2. On the contactor

bypass’s, 29G uses the top switch and the bottom switch. The newer

contactor bypasses (some starting in 2018) have 29G integrated and

standard for either the ATS or the bypass contactors. See the switch

instruction booklet for operating  instructions. The controller is in

monitor mode during the manual operation meaning the controller

will not attempt to change the switch position but will monitor the

voltage availability and the switch positions. The ATC-900’s display

will show “Monitor Mode”.

Several options for closed transition

Once an ATS is in the field, other uses or changes may occur that

could require changes from the original configuration. For example,

an application may initially require that only a closed transition should

be used and if it fails to sync, then the transfer switch will not switch

to the other source and will show an alarm. If the requirements

change  and the transfer switch needs to transfer using open transi

tion if closed does not occur, instead of sending the controller back

to the factory for reprogramming, the user can easily change the

transition setpoints to accomplish this.

If the controller is ordered with closed-transition enabled, the

user will have access to options 47C, D, E, F and G, which can be

changed by the setpoints to disable or enable the functions (see

below). Screen 3 of 5 in the system setup menu (See section 3.4.1)

is where the user can set the closed transition options as shown below:

47C = Closed/in-phase/load voltage decay

47D = Closed only (alarm on sync fail)

47E = Closed/in-phase/time delay neutral

47F = Closed/load voltage decay

47G = Closed/time delay neutral

Closed transition operation

Closed transition is a feature that will temporarily parallel two live

sources in a make-before-break scheme when performing a transfer.

This achieves a transfer between sources with no power interrup

tion. Both sources must be synchronized in frequency, phase, and

voltage before the transfer will take place. Closed transition voltage

and frequency limits are adjustable in the system setpoints  (3 of 5)

screen. Maximum phase difference is fixed at 0.3 degrees.

The user can also disable closed transition and just use the following:

In-phase > TDN

In-phase > LVD

Also with closed transition and in-phase disabled: TDN or LVD

The user setpoints for closed transition are as follows: Disabled (closed transition not used)

Alarm on synchronization fail (will not switch and will show an alarm)

Fallback to open on synchronization fail (to in-phase, TDN, and/or LVD)

For in-phase and closed transfers, the phase difference between

sources is displayed above the ATC-900’s sync time countdown message.

Emergency source

The emergency source is defined as the source that is not preferred.

If NONE is chosen for the preferred source setting, the emergency

source will be the source that is presently not attached to the load.

Therefore, in this condition after a transfer, the normal and emer

gency sources will switch between source 1 and 2.

Features

The ATC-900 has many features that are available to the user. These

features are standard and are available depending on the type of

transfer switch used (i.e. contactor, power frame switch/breaker,

or molded case switch/breaker). Appendix A has a list of all of the

features including any acronyms used along with a brief description.

See Table 8 “ATC-900 features” for a compact list of features, includ

ing a full list of available I/O. Consult Section 5 and Appendix B for

I/O descriptions. For some transfer switch configurations, standard

control input(s) and/or standard relay output(s) will come prepro

grammed from the factory. An example of this is service entrance

which requires the go to neutral input.

The ATC-900 is configured as either open-transition or closed-transi

tion. Closed-transition operation is covered in section 1.5.3.

Some ATC-900 programmable features are only available on specific

transfer switch construction types. By example, a contactor type

transfer switch (2-position) does not allow the electrical load to be

disconnected for a programmed time delay period therefore the

TDN (time delay neutral) feature is not available. A molded case type

transfer switch is mechanically interlocked to prevent paralleling of

the power sources therefore the closed transition feature is not available.