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IB140036EN

For more information visit: www.eaton.com

Instruction Booklet

Effective:  October 2014

Page

 

11

O&M Manual for 40-1200A (480/600 Vac) ATC-900 3-Position, 

Open/Closed Transition Contactor Based Transfer Switch

lished by a customer programmed level. The transfer will not 

take place until the back EMF decays below the acceptable pro-

grammed 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.

Optional Feature 47G: Closed/Time Delay Neutral

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 

interruption. Both sources must be synchronized in frequency, 

phase, and voltage before the transfer is initiated. 

Time delay neutral provides a time delay in the transfer switch 

neutral position when both breakers 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.

Two Options for Closed Transition

If closed transition is available on the switch, the user will either 

receive 47 D or all of the other options 47 C, E, F, G which can 

be changed by the setpoints to disable or enable the function. 

Screen 3 of 3 in the System Setup menu (See section 3.4.1) is 

where the user will set the transition types of the switch. If the 

switch can perform closed transition the user will set up the set-

points depending on the scenario required as shown below.

Closed Transition only (47D) or

Closed Transition > In-Phase > TDN

Closed Transition > In-Phase > LVD

Closed Transition > TDN

Closed Transition > LVD

The user can 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

Standard Feature 3: Time Delay Emergency to Normal (TDEN)

TDEN delays the transfer to the Normal Source to permit stabili-

zation of the Normal power source before the transfer is made. 

This timer will begin the countdown from its setting value when 

the Normal Source becomes available. During the countdown of 

this timer, if the Normal Source should become unavailable, the 

timer will be aborted. If the Preferred Source is available and the 

Emergency Source fails while the TDEN timer is counting down, 

the TDEN timer will be bypassed. 

Standard Feature 4: Time Delay for Engine Cool-Off (TDEC)

TDEC permits the generator to run under a no-load condition 

after a transfer from the generator source has been made. Count-

down timing begins when the transfer is completed. In applica-

tions where two generators are selected, the same cool-off timer 

setting value is used for both. 

Display 

There are two displays used on the ATC-900.  There is the famil-

iar MIMIC display using LEDs (see below) and the color display 

using the push buttons for menu operation.

Source 1 Connected - Status LED

This LED is lit green if Source 1 is connected. This is accom-

plished by sensing the Source 1 breaker via the S1 closed auxil-

iary contact.

Source 2 Connected - Status LED

This LED is lit red if Source 2 is connected. This is accomplished 

by sensing the Source 2 breaker via the S2 closed auxiliary con-

tact.

Source 1 Available - Status LED

CAUTION

LOAD ENERGIZE LED IS NOT A POSITIVE INDICATION THAT VOLT-

AGE IS NOT PRESENT ON THE LOAD TERMINALS.

This LED is lit amber if Source 1 meets the criteria for pro-

grammed Source 1 setpoints.

Source 2 Available - Status LED

This LED is lit amber if Source 2 meets the criteria for pro-

grammed Source 2 setpoints.

Source 1 Preferred - Status LED

This LED is lit red if Source 1 is the preferred source choice.

Source 2 Preferred - Status LED

This LED is lit red if Source 2 is the preferred source choice.

Load Energized - Status LED

This LED is lit red if the load is connected to a source that is 

available.

 

CAUTION

CHANGING THE SYSTEM NOMINAL VOLTAGE OR FREQUENCY SET-

POINTS WILL CAUSE PICKUP AND DROPOUT SETPOINTS TO 

CHANGE AUTOMATICALLY TO NEW DEFAULT VALUES.

Optional Feature 9B: Maintenance Selector Switch (MSS)

Marked “OFF”, “ON”.  This feature provides selector switch dis-

connection of control to transfer thus allowing testing of the 

transfer switch control logic circuitry without initiating load 

transfer. Positioning the MSS in the “OFF” position isolates the 

control circuit, permitting manual operation of the transfer 

switch or testing of logic circuitry without load transfer.

Optional Feature 29G: Auto/Manual Operation 

 

(Available for 3-Position ATS only)

This feature provides 2-position auto/manual selector switch 

marked “Auto/Manual” which permits the selection of automatic 

or manual operation. Once the selector switch is transferred to 

manual mode, manual transfer between Normal (S1), Neutral and 

Emergency (S2) can be achieved by operating 3-position selector 

switch marked “Normal-OFF-Emergency”.

Optional Feature 29G: Auto/Manual Operation 

 

(Available for 2-Position ATS only)

This feature provides 2-position auto/manual selector switch 

marked “Auto/Manual” which permits the selection of automatic 

or manual operation. Once the selector switch is transferred to 

manual mode, manual transfer between Normal (S1) and Emer-

gency (S2) can be achieved by operating another 2-position 

selector switch marked “Normal-Emergency”.

Summary of Contents for ATC-900

Page 1: ...sition Contactor Based Transfer Switch Instruction Booklet Description Page Introduction 2 Receiving Handling and Storage 6 Equipment Description 7 Installation and Wiring 14 Operation 20 Testing and...

Page 2: ...A It is provided as a guide for authorized and qualified person nel only Please refer to the specific WARNING and CAUTION in Section 1 1 2 before proceeding If further information is required by the p...

Page 3: ...stored the ATS automatically transfers back and initiates generator shutdown In the event the Source 1 power source fails and the Source 2 power source does not appear the ATS remains connected to the...

Page 4: ...ent catalog numbers provide a significant amount of relevant information that pertains to a particular piece of equipment The Catalog Number Identification Table Table 2 provides the required interpre...

Page 5: ...applica ble setpoint ranges for the nominal voltage and frequency setting Source 2 Failed or Fails Source 2 is defined as failed when it is outside of its under voltage overvoltage underfrequency over...

Page 6: ...o sure Care should be exercised however to protect the equip ment from impact at all times Do not remove the protective packaging until the equipment is ready for installation When the ATS equipment r...

Page 7: ...POWER PANEL VOLTAGE SELECTION TRANSFORMER PANEL Figure 5A Three Basic Panels of an Open Transition ATS 1200A LOGIC PANEL POWER PANEL VOLTAGE SELECTION TRANSFORMER PANEL Figure 5B Three Basic Panels of...

Page 8: ...North American market voltage selection panel consists of multi tap transformers contained in a steel case mounted in the transfer switch enclosure Figure 7 The cover has two connec tors on it with th...

Page 9: ...oller has an operating temperature of 20 to 70 C 4 to 158 F The controller circuit board is protected by an insulating confor mal coating The specifications under normal operating conditions are as fo...

Page 10: ...hieves a transfer between sources with no power interruption Both sources must be synchronized in fre quency phase and voltage before the transfer is initiated In phase transition is a feature that wi...

Page 11: ...ad condition after a transfer from the generator source has been made Count down timing begins when the transfer is completed In applica tions where two generators are selected the same cool off timer...

Page 12: ...Control This feature displays status information of a remotely located ATC 900 controller The HMI type Remote Annunciator will seri ally communicate with the ATC 900 over the Modbus 485 or Ethernet u...

Page 13: ...ton ATS equipment enclosed in any of the enclosures listed in Table 3 is listed for application by UL and ULC In addition Eaton ATSs are listed in File E38116 by Underwriters Laborato ries Inc under S...

Page 14: ...supporting the weight of the enclosed ATS equipment For standard ATSs avoid locations that are moist hot or dusty However Eaton offers optional enclosure designs that can be used in special environmen...

Page 15: ...1A Typical Mounting of the ATS to a Mounting Surface Open Transition ATS for Wall Mounting Step 5 Double check to ensure that all packing and shipping materials have been removed Step 6 If Seismic Uni...

Page 16: ...tion Verify that the lugs supplied will accommodate the power cables being used Also verify that the cables comply with local electrical codes Standard ATS equipment as supplied from the factory will...

Page 17: ...ment is installed and operating properly 4 6 Engine Start Connection The engine control contact connections are located on the logic panel of the ATS Connect the engine start wires to the red ter mina...

Page 18: ...232 J14 CT Earth Controller Ground J8 USB Front Panel Memory Stick Interface J11 I O Module s SW1 Modbus Terminator Module J13 RS 422 Interface Source Load Interface Switch Position Contacts For more...

Page 19: ...he cover has two connec tors on it with the one on the right being selectable depending on the voltage applied to S1 and S2 The transformer unit is eas ily removed by removing the two front screws and...

Page 20: ...OURCE 2 IF A GENERATOR CONTROL SELECTOR SWITCH TO THE OFF POSITION BEFORE ATTEMPTING A MANUAL TRANS FER To manually operate 1 Disconnect all sources of power 2 Disconnect the J7 connector from the ATC...

Page 21: ...s on Source 1 4 Simultaneously the engine cool down timer initiates the shut down of the engine driven generator 5 Transfer of the load back to the Source 1 power source is now complete Section 6 Test...

Page 22: ...ded for a preset time after transfer to the Source 1 power source is com pleted 6 1 5 Alternate Tests 1 Alternate operational tests may be possible depending upon the options provided with any given A...

Page 23: ...to go to Source 1 Step 4 Depress the TRIP button located on the operating mechanism of the contactor to bring the contactor to neutral trip position Step 5 Depress the SELECT button located on the ope...

Page 24: ...the structure area for safety hazards or potential maintenance problems Inspect the area especially where switching device is installed for any safety hazards including personnel safety and fire hazar...

Page 25: ...at 68C8282H02 40 1200A Domestic Switch 480VAC 600VAC 4 Pole Cat 68C8282H02 Power Panel Close Transition Does not include Contactor 40 1200A Domestic Switch 480AC 600VAC 2 Pole Cat 69D8080H01 40 1200A...

Page 26: ...LY SUGGESTED THAT THE FULL INSTRUCTIONS BE FOLLOWED FOR ALL INSTALLATIONS SET UP AND TESTING Step 1 Mount the ATS on a flat rigid surface Figure 18A 18B Shim if necessary Figure 18A Mounting Details O...

Page 27: ...TAGE SELECTION PANEL LOGIC PANEL GROUND CONNECTION IB140036EN For more information visit www eaton com Instruction Booklet Effective October 2014 Page 27 O M Manual for 40 1200A 480 600 Vac ATC 900 3...

Page 28: ...TION PANEL LOGIC PANEL GROUND CONNECTION For more information visit www eaton com IB140036EN Instruction Booklet Page 28 Effective October 2014 O M Manual for 40 1200A 480 600 Vac ATC 900 3 Position O...

Page 29: ...e proper wire size as listed by the generator set Genset manufacturer For the I O connections there are some switches that the Inputs are wired to a terminal block while others are not When they are n...

Page 30: ...ource 1 contactor Momentarily energize K3 N Is Source 1 available yet Y Source 1 is powering the load TDN timer times out if Option 32A is enabled TDN timer times out if Option 32A is enabled Source 1...

Page 31: ...ad TDN timer times out if Option 32A is enabled TDN timer times out if Option 32A is enabled Source 1 is powering the load N Is Source 1 available yet TDEN timer times out Y Open Source 2 contactor En...

Page 32: ...ww eaton com IB140036EN Instruction Booklet Page 32 Effective October 2014 O M Manual for 40 1200A 480 600 Vac ATC 900 3 Position Open Closed Transition Contactor Based Transfer Switch Figure 22 Close...

Page 33: ...N For more information visit www eaton com Instruction Booklet Effective October 2014 Page 33 O M Manual for 40 1200A 480 600 Vac ATC 900 3 Position Open Closed Transition Contactor Based Transfer Swi...

Page 34: ...information visit www eaton com IB140036EN Instruction Booklet Page 34 Effective October 2014 O M Manual for 40 1200A 480 600 Vac ATC 900 3 Position Open Closed Transition Contactor Based Transfer Swi...

Page 35: ...N For more information visit www eaton com Instruction Booklet Effective October 2014 Page 35 O M Manual for 40 1200A 480 600 Vac ATC 900 3 Position Open Closed Transition Contactor Based Transfer Swi...

Page 36: ...OF TRADE ARE MADE REGARDING THE INFORMATION RECOMMENDATIONS AND DESCRIPTIONS CONTAINED HEREIN In no event will Eaton be responsible to the purchaser or user in contract in tort including negligence st...

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