Woodward DTSC-200A User guide

37942A
Application
Release 1.0 - 0
Document ID: 37942, Revision A
DTSC-200A
ATS Controller- Application

Manual 37942A DTSC-200A - ATS Controller - Application
Page 2/21 © Woodward
WARNING
Read this entire manual and all other publications pertaining to the work to be performed before in-
stalling, operating, or servicing this equipment. Practice all plant and safety instructions and precau-
tions. Failure to follow instructions can cause personal injury and/or property damage.
The engine, turbine, or other type of prime mover should be equipped with an overspeed (overtempera-
ture, or overpressure, where applicable) shutdown device(s), that operates totally independently of the
prime mover control device(s) to protect against runaway or damage to the engine, turbine, or other
type of prime mover with possible personal injury or loss of life should the mechanical-hydraulic gov-
ernor(s) or electric control(s), the actuator(s), fuel control(s), the driving mechanism(s), the linkage(s),
or the controlled device(s) fail.
Any unauthorized modifications to or use of this equipment outside its specified mechanical, electrical,
or other operating limits may cause personal injury and/or property damage, including damage to the
equipment. Any such unauthorized modifications: (i) constitute "misuse" and/or "negligence" within
the meaning of the product warranty thereby excluding warranty coverage for any resulting damage,
and (ii) invalidate product certifications or listings.
CAUTION
To prevent damage to a control system that uses an alternator or battery-charging device, make sure
the charging device is turned off before disconnecting the battery from the system.
Electronic controls contain static-sensitive parts. Observe the following precautions to prevent dam-
age to these parts.
•Discharge body static before handling the control (with power to the control turned off, contact a
grounded surface and maintain contact while handling the control).
•Avoid all plastic, vinyl, and Styrofoam (except antistatic versions) around printed circuit boards.
•Do not touch the components or conductors on a printed circuit board with your hands or with
conductive devices.
OUT-OF-DATE PUBLICATION
This publication may have been revised or updated since this copy was produced. To verify that you
have the latest revision, be sure to check the Woodward website:
http://www.woodward.com/pubs/current.pdf
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Important definitions
WARNING
Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that, if not avoided, could result in damage to equipment.
NOTE
Provides other helpful information that does not fall under the warning or caution categories.
Woodward reserves the right to update any portion of this publication at any time.Information provided by Woodward is believed to be
correct and reliable. However, Woodward assumes no responsibility unless otherwise expressly undertaken.
© Woodward
All Rights Reserved.

Manual 37942A DTSC-200A - ATS Controller - Application
© Woodward Page 3/21
Revision History
Rev.
Date
Editor
Changes
A
2022-31-03
Ma
1.0-0 - Based on DTSC-200 V2.0017
Content
CHAPTER 1. GENERAL INFORMATION.....................................................................................5
Related Documents.............................................................................................................................5
QR Code.............................................................................................................................................5
CHAPTER 2. APPLICATION MODES.........................................................................................6
Basic Applications...............................................................................................................................6
Application Mode: Util-Gen........................................................................................................6
Application Mode: Gen-Gen ......................................................................................................7
Application Mode: Util-Util..........................................................................................................8
Special Applications............................................................................................................................9
Example Application: Transfer Delay (Util-Util)...........................................................................9
Example Application: External Permit Closed Transition..........................................................10
CHAPTER 3. APPLICATION WIRING ......................................................................................12
Wiring the Limit Switch Reply Inputs..................................................................................................12
Wiring "Closed" Replies Only...................................................................................................12
Wiring All Replies....................................................................................................................13
CHAPTER 4. APPLICATION EXAMPLES..................................................................................14
Gen-2-Gen Application......................................................................................................................14
Functional Description.............................................................................................................14
Description of the Gen-2-Gen Functions Depending on the Source Priority..............................15
CHAPTER 5. REALIZING SPECIAL FUNCTIONS .......................................................................16
Enabling a Delayed Transition via Key Switch ...................................................................................16
External Initiation of an Extended Parallel Time.................................................................................17
Opening an External CB with the Shunt Trip Enable Signal ...............................................................18
Using the Overlap Time Counter .......................................................................................................20

Manual 37942A DTSC-200A - ATS Controller - Application
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Illustrations And Tables
Illustrations
Figure 2-1: Application mode - Util-Gen............................................................................................................................................6
Figure 2-2: Application mode - Gen-Gen ...........................................................................................................................................7
Figure 2-3: Application mode - Util-Util............................................................................................................................................8
Figure 2-4: Example application - transfer delay (Util-Util) .............................................................................................................9
Figure 2-5: Example application –external permit closed transition..............................................................................................10
Figure 2-6: Example application –LogicsManager .........................................................................................................................11
Figure 3-1: Limit switch reply wiring - "closed" replies only.........................................................................................................12
Figure 3-2: Limit switch reply wiring - all replies............................................................................................................................13
Figure 4-1: Gen-2-Gen application....................................................................................................................................................14
Figure 5-1: Example - transition mode selection switch wiring......................................................................................................16
Figure 5-2: Example - LogicsManager Delayed mode active.........................................................................................................16
Figure 5-3: Example - transition mode selection switch wiring......................................................................................................17
Figure 5-4: Example - LogicsManager Extended parallel time.......................................................................................................17
Figure 5-5: Example - Shunt trip enable signal wiring ....................................................................................................................18
Figure 5-6: Example - LogicsManager Shunt trip enable signal.....................................................................................................18
Figure 5-7: Overlap time counter screen...........................................................................................................................................20
Tables
Table 1-1: Manual - Overview.............................................................................................................................................................5

Manual 37942A DTSC-200A - ATS Controller - Application
© Woodward Page 5/21
Chapter 1.
General Information
Related Documents
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Type
English
German
DTSC-200A
DTSC-200A - Installation
37939
-
DTSC-200A - Configuration
37940
-
DTSC-200A - Operation
37941
-
DTSC-200A - Application
this manual 
37942
-
DTSC-200A - Interfaces
37943
-
Table 1-1: Manual - Overview
Intended Use The unit must only be operated for the uses described in this manual. The prerequisite for a proper
and safe operation of the product is correct transportation, storage, and installation as well as careful operation
and maintenance.
NOTE
This manual has been developed for a unit fitted with all available options. Inputs/outputs, functions,
configuration screens and other details described, which do not exist on your unit, may be ignored.
The present manual has been prepared to enable the installation and commissioning of the unit. On
account of the large variety of parameter settings, it is not possible to cover every possible combina-
tion. The manual is therefore only a guide. In case of incorrect entries or a total loss of functions, the
default settings can be taken from the enclosed list of parameters at the rear of this manual.
QR Code
To get access to the complete product documentation, scan this QR code or use the following link:
➔http://wwdmanuals.com/dtsc-200a

Manual 37942A DTSC-200A - ATS Controller - Application
Page 6/21 © Woodward
Chapter 2.
Application Modes
Basic Applications
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Application Mode: Util-Gen
This application mode has the following characteristics:
•The ATS controller monitors a mains sources and a generator source and transfers the load to the
generator source in case the mains source fails
•The ATS controller operates as Master controller
Figure 2-1: Application mode - Util-Gen

Manual 37942A DTSC-200A - ATS Controller - Application
© Woodward Page 7/21
Application Mode: Gen-Gen
This application mode has the following characteristics:
•The ATS controller monitors two generator sources and transfers the load to the other source in case
the regular source fails
•The ATS controller operates as Slave controller
•This application is not a stand-alone application and always combined with another ATS controller
in Util-Gen application mode, which operates as Master controller
Figure 2-2: Application mode - Gen-Gen

Manual 37942A DTSC-200A - ATS Controller - Application
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Application Mode: Util-Util
This application mode has the following characteristics:
•The ATS controller monitors two mains sources and transfers the load to the secondary source in
case the primary source fails
•The ATS controller operates as Master controller
•If “Connect to synchronous mains” parameter 8820 is enabled, the transfer between two utility
sources is allowed for the phase angle being in the phase angle range from 0 to value of “Max.
phase angle” parameter 8821.
Figure 2-3: Application mode - Util-Util

Manual 37942A DTSC-200A - ATS Controller - Application
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Special Applications
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Example Application: Transfer Delay (Util-Util)
The example shows two DTSC-200A (ATS 1 & ATS 2) which are feeding two loads (Load 1 & Load 2). Since
the two mains sources are always present, all stable delay timers are always expired. In case “Source 1” would
fail, both ATS would transfer both loads to “Source 2” immediately. In some transfer scenarios the loads can
have different priorities. In a hospital for example, “Load 1” could be the “Emergency” load and “Load 2” a
“Non-Emergency” load. In that case the system owner wants the “Emergency” loads to be transferred first, and
“Non-Emergency” loads to be transferred second. In such a scenario the “Transfer delay timers” become an im-
portant tool to prioritize the loads. See the following example:
Figure 2-4: Example application - transfer delay (Util-Util)
Example details:
•Assumption: ATS 1 transfer delay timers are configured to 5 seconds
•Assumption: ATS 2 transfer delay timers are configured to 10 seconds
•Source 1 and Source 2 are available and OK
•Now Source 1 fails
•After the transfer delay timer of ATS 1 has expired ( 5 seconds ), it will transfer Load 1 to Source 2
•After the transfer delay timer of ATS 2 has expired ( 10 seconds ), it will transfer Load 2 to Source 2
•Conclusion: Without the transfer delay timers, both ATS would transfer the load to Source 2 simultane-
ously

Manual 37942A DTSC-200A - ATS Controller - Application
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Example Application: External Permit Closed Transition
In some ATS applications the customer may want to use an additional “Sync-check relay” in combination with
the DTSC-200A for highest system security. Only if the external sync-check relay sends a “Synchronism detect-
ed” signal to the DTSC-200A, then the in-phase monitor in the DTSC-200A shall be activated.
The “Enable closed transition” LogicsManager is the ideal function to carry out this functionality.
Figure 2-5: Example application –external permit closed transition
Setup:
•Parameter “Ext. permit for cld. trans.” must be set to “On” to activate this feature
•Parameter “Transfer switch type” must be configured to “Closed”
•Wire the relay output of the external sync-check relay to a free discrete input on the DTSC-200A
•Configure the LogicsManager for “Enable closed transition” in such a way, that the discrete input you
intend to use is setup here

Manual 37942A DTSC-200A - ATS Controller - Application
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Figure 2-6: Example application –LogicsManager
Explanation LogicsManager:
•This LogicsManager becomes only active, if parameter “Ext. permit for cld. trans.” is set to “On”
•If discrete input “6” becomes active, the LogicsManager output will turn into a logical “TRUE” state,
and activates the “In-Phase monitoring” of the DTSC-200A

Manual 37942A DTSC-200A - ATS Controller - Application
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Chapter 3.
Application Wiring
Wiring the Limit Switch Reply Inputs
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Wiring "Closed" Replies Only
NOTE
This wiring scheme must be used for Standard transition switches and Delayed or Closed transition
switches if "Use Limit sw. OPEN replies" (parameter 3434) is configured to "NO".
Power Supply + 2
Reply: Switch in S1 position 10
Reply: Switch in S2 position 11
+24Vdc
*1
*2
GND
Power Supply - 1
Figure 3-1: Limit switch reply wiring - "closed" replies only
•*1Limit switch mounted on transfer switch indicating "S1 position"
•*2Limit switch mounted on transfer switch indicating "S2 position"
NOTE
Important:
If no voltage is applied to the reply DI, this DI is considered as active by the DTSC, i.e. the limit switch
position is considered as "reached":
Terminal 10 open = Switch is NOT in S1 position
Terminal 10 with Power supply GND connected = Switch is in S1 position
Terminal 11 open = Switch is NOT in S2 position
Terminal 11 with Power supply GND connected = Switch is in S2 position

Manual 37942A DTSC-200A - ATS Controller - Application
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Wiring All Replies
NOTE
This wiring scheme must be used for Delayed or Closed transition switches if the Parameter "Use Limit
sw. OPEN replies" is configured to "YES".
Reply: Switch in S1 position 10
Reply: Switch in S2 position 11
*1
*2
Reply: Switch in S1 open position 12
Reply: Switch in S2 open position 13
*3
*4
Power Supply + 2+24Vdc
GND
Power Supply - 1
Figure 3-2: Limit switch reply wiring - all replies
•*1Limit switch mounted on transfer switch indicating "S1 position"
•*2Limit switch mounted on transfer switch indicating "S2 position"
•*3Limit switch mounted on transfer switch indicating "S1 open position"
•*4Limit switch mounted on transfer switch indicating "S2 open position"
NOTE
Important:
If no voltage is applied to the reply DI, this DI is considered as active by the DTSC, i.e. the limit switch
position is considered as "reached":
Terminal 10 open = Switch is NOT in S1 position
Terminal 10 with Power supply GND connected = Switch is in S1 position
Terminal 11 open = Switch is NOT in S2 position
Terminal 11 with Power supply GND connected = Switch is in S2 position
Terminal 12 open = Switch is in S1 position
Terminal 12 with Power supply GND connected = Switch is NOT in S1 position
Terminal 13 open = Switch is in S2 position
Terminal 13 with Power supply GND connected = Switch is NOT in S2 position

Manual 37942A DTSC-200A - ATS Controller - Application
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Chapter 4.
Application Examples
Gen-2-Gen Application
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Functional Description
This application mode enables to perform an ATS application with two gensets.
If the preferred genset fails, the second genset will be started automatically and the load will be transferred to the
other genset (source).
Figure 4-1: Gen-2-Gen application
Parameters Related with the Gen-2-Gen Application
•Source 1 Priority
•Source 2 Priority
•Application mode must be configured to "Gen-Gen"
•LogicsManager for "Gen-Gen enable" (must be enabled to start the preferred genset)
•LogicsManager flag "Engine 1 start" (must be configured to a relay to issue a second engine start signal for
genset 1)
•"S1 start fail delay time"
•"S2 start fail delay time"
•"Preferred source delay time"
•"S1 outage delay"
•"S2 outage delay"
•"Engine 1 cooldown time"
•"Engine 2 cooldown time"
G1
G2
S1 ATS1 ATS2
Load
ATS2
Slave Controller
Gen-2-GenApplication
ATS1
Master Controller
Mains-2-GenApplication
Start =
Slave mode enable
Start engine 1
Start engine 2

Manual 37942A DTSC-200A - ATS Controller - Application
© Woodward Page 15/21
Configuration Checklist for Enabling the Gen-2-Gen Mode
Determine the source priority using the "Source 1 priority" and "Source 2 priority" parameters
Assign a discrete input to the "Gen-Gen enable" LogicsManager to release an engine start signal
A second engine start signal (LogicsManager Parameter 20.18 Engine 1 start) must be configured to a relay out-
put
The "Cooldown timer" for both engines must be configured correctly
Description of the Gen-2-Gen Functions Depending on the Source Priority
Source 1 is Prioritized
If the "Gen-Gen enable" LogicsManager becomes "True", genset 1 will be started. This will be indicated on the
display with the "Start engine 1" message.
If genset 1 starts before the configured "S1 start fail delay time" expires, the "Source 1 stable timer" will be start-
ed and the load will be transferred to genset 1.
Special case: genset 1 doesn't start
If genset 1 does NOT start within the configured "S1 start fail delay time", a "Start fail S1" failure will be issued,
genset 2 will be started immediately and the load will be transferred to genset 2.
Source 2 is Prioritized
If the "Gen-Gen enable" LogicsManager becomes "True", genset 2 will be started. This will be indicated on the
display with the "Start engine 2" message.
If genset 2 starts before the configured "S2 start fail delay time" expires, the "Source 2 stable timer" will be start-
ed and the load will be transferred to genset 2.
Special case: genset 2 doesn't start
If genset 2 does NOT start within the configured "S2 start fail delay time", a "Start fail S2" failure will be issued,
genset 1 will be started immediately and the load will be transferred to genset 1.
Both Sources are NOT Prioritized (Priority = None)
If the "Gen-Gen enable" LogicsManager becomes "True", the gensets 1 and 2 will be started simultaneously.
This will be indicated on the display with the "Start engines" message.
The first genset which starts becomes the "prioritized" source automatically. The engine start command for the
other generator (secondary source) will be de-energized.
Now, the secondary source serves as emergency source in case that the prioritized source fails.
If genset 2 starts before the configured "S2 start fail delay time" expires, the "Source 2 stable timer" will be start-
ed and the load will be transferred to genset 2.
Special case: both gensets do not start
If genset 1 and genset 2 do NOT start within the configured "S1 Start fail delay time" or “S2 Start fail delay
time”, a "Start fail S1" and a "Start fail S2" failure will be issued. Both engine start signals will be disabled again.
All failures must be acknowledged before a new start attempt may be performed.

Manual 37942A DTSC-200A - ATS Controller - Application
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Chapter 5.
Realizing Special Functions
Enabling a Delayed Transition via Key Switch
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Sometimes it may be necessary to install a key switch for selecting the transition mode. This may happen if the
utility provider prevents a "parallel operation" i.e. an operation with a closed transition switch.
In this case it is possible to install a key switch, which is wired to a discrete input (in this example DI 6) of the
DTSC, in the front panel.
Power Supply - 1
Discrete Input 6 15
+24Vdc
GND
Power Supply + 2
Key-
Switch
0
1
Key-switch position 0 = Close transition mode
Key-switch position 1 = Delayed mode
Figure 5-1: Example - transition mode selection switch wiring
The LogicsManager function "Delayed mode active" must be configured to this discrete input to become TRUE
as soon as this DI is energized (key switch is turned to "Delayed").
Figure 5-2: Example - LogicsManager Delayed mode active
NOTE
Please refer to parameter “In-phase check for DLY trans.” (parameter 4585) in the configuration manual
(37940).

Manual 37942A DTSC-200A - ATS Controller - Application
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External Initiation of an Extended Parallel Time
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If a closed transition is performed, the overlap time of the make-before-break process, in which both sources are
parallel, is less than 100 ms (refer to parameter 4577). If this time is to be extended, a LogicsManager function is
available to keep the transition switch in overlap position. This may be achieved by a digital signal of an external
synchronization device for example.
In this case it is possible to configure the external synchronization device to close a relay, which is wired to a dis-
crete input (in this example DI 7) of the DTSC, as long as the transfer switch shall remain in parallel position.
Power Supply - 1
Discrete Input 7 19
+24Vdc
GND
Power Supply + 2
External device
Figure 5-3: Example - transition mode selection switch wiring
The LogicsManager function "Extended parallel time" must be configured to this discrete input to become TRUE
as soon as this DI is energized (external synchronization device energizes its relay to keep the transfer switch in
parallel position).
Figure 5-4: Example - LogicsManager Extended parallel time

Manual 37942A DTSC-200A - ATS Controller - Application
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Opening an External CB with the Shunt Trip Enable Signal
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If a closed transition transfer switch fails to open from overlap position due to a mechanical or electrical failure, it
is necessary to provide an external circuit breaker to disconnect the source from the load to prevent a continuous
parallel time. The DTSC-200A provides a shunt trip enable signal, which is enabled if the unit fails to open the
transfer switch from both sources.
In this case it is possible to configure a discrete output of the DTSC-200A (in this example R 3) to energize when
the shunt trip signal is enabled using the LogicsManager. The discrete output will then open an external circuit
breaker to disconnect the source from the load.
Discrete Output R3
7
Power supply
2
+24Vdc
GND
Figure 5-5: Example - Shunt trip enable signal wiring
Please configure LogicsManager function "Relay 3" with command variable “Shunt trip enable signal (20.12)” as
shown in Figure 5-6.
Figure 5-6: Example - LogicsManager Shunt trip enable signal

Manual 37942A DTSC-200A - ATS Controller - Application
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The following example shows a transfer sequence, which fails to open the switch from both sources, which caus-
es the shunt trip enable flag to be enabled:
Initial situation:
A transfer from source 1 is initiated and the transfer switch is in
overlap position.
If the maximum overlap time has expired and the LogicsManag-
er function "Extended parallel time" is FALSE, the unit tries to
open the transfer switch from the previous source. If this fails,
the unit detects an opening failure from the previous source.
Now, the unit tries to open the transfer switch from the new
source. If this fails as well, the unit detects an opening failure
from the new source and enables the shunt trip enable flag
(20.12). This flag remains enabled until the switch is opened and
the failure has been acknowledged.
S1 S2
1
S1 S2
2
S1 S2
2

Manual 37942A DTSC-200A - ATS Controller - Application
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Using the Overlap Time Counter
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The DTSC-200A provides an overlap time counter, which displays the transfer switch overlap time of the last
transfer. This counter will be refreshed with every transfer across the overlap position.
The overlap time counter is displayed on the Counter screen, which may be viewed by pressing next page button
until the Counter screen is displayed.
Figure 5-7: Overlap time counter screen
It is very important for some applications that a maximum overlap time is not exceeded. Aging or wear of the
transfer switch as well as heavily chattering feedback contacts of the limit switches may result a deterioration of
the transfer characteristics of a switch, which again increases the overlap time. The overlap time counter provides
a convenient way to monitor the time for which the transfer switch has remained in overlap position for the last
transfer.
NOTE
Overlap time measurement has an intense dependency on the quality of the feedback signals. If the
feedback signals are chattering heavily, deviations of the time measurement may occur. If the feedback
signals do not chatter, the accuracy of the overlap time counter is +1 ms. Tests with a heavily chatter-
ing signal with a chatter time of approx. 20 ms have shown a deviation of approx. +3 ms. This means
that the actual overlap time may be shorter than the reading.
This feature is intended to estimate whether a transfer switch is still operated within its specifications.
If overlap times outside the specifications are detected using the DTSC-200A, the overlap time of the
transfer switch should be determined using professional calibrated test tools like oscilloscopes for ex-
ample.