THOMSON MEC 320 - GENSET CONTROLLER, MEC 320 Operating Manual
MEC 320
GENSET CONTROLLER
OPERATING MANUAL
SOFTWARE VERSION 2.33.X
9087A – 198th Street, Langley, BC Canada V1M 3B1 Telephone (604) 888-0110
Telefax (604) 888-3381 E-Mail: info@thomsontechnology.com www.thomsontechnology.com
PM079 Rev 0 07/06/08
MEC 320 GENSET CONTROLLER
Table of Contents
1. ABOUT THIS DOCUMENT ........................................................................................................... 4
ENERAL PURPOSE
G
NTENDED USERS
I
ONTENTS/OVERALL STRUCTURE
C
2. WARNINGS AND LEGAL INFORMATION ............................................................................... 6
EGAL INFORMATION AND RESPONSIBILITY
L
LECTROSTATIC DISCHARGE AWARENESS
E
AFETY ISSUES
S
EFINITIONS
D
3. GENERAL PRODUCT INFORMATION .....................................................................................7
NTRODUCTION
I
YPE OF PRODUCT
T
UTILITY SOFTWARE WARNING
PC
4. FUNCTIONAL DESCRIPTIONS................................................................................................... 8
TANDARD FUNCTIONS
S
PPLICATIONS
A
LOWCHARTS
F
EQUENCES
S
5. DISPLAY UNIT AND MENU STRUCTURE.............................................................................. 35
ISPLAY UNIT
D
ENU STRUCTURE
M
ODE OVERVIEW
M
ODE SELECTION
M
ASSWORD
P
6. ADDITIONAL FUNCTIONS ........................................................................................................ 50
HORT TIME PARALLEL
S
IME DEPENDENT START/STOP
T
ERATE GEN-SET
D
AIL CLASS
F
ERVICE TIMERS
S
IRE BREAK DETECTION
W
INPUTS
VDO
ANGUAGE SELECTION
L
EXTS IN STATUS LINE
T
ERVICE MENU
S
VENT LOG
E
OUNTERS
C
7. PROCEDURE FOR PARAMETER SETUP ............................................................................... 68
INDING THE SELECTED PARAMETER
F
ARAMETER DESCRIPTIONS
P
ETUP
S
8. PARAMETER LIST ...................................................................................................................... 70
ARAMETER TABLE DESCRIPTION
P
VERVIEW LIST
O
ROTECTION
P
ONTROL
C
NPUT/OUTPUT
I
YSTEM
S
UMP MENUS
J
............................................................................................................................................. 67
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PM079 Rev 0 07/06/08 3 Thomson Technology
MEC 320 GENSET CONTROLLER
Please make sure to read this handbook before working with the MEC 320
set to be controlled. Failure to do this could result in
1. About this document
This chapter includes general user information about this handbook concerning the general
purpose, the intended users and the overall contents and structure.
General purpose
This document is the Peak Plus Reference Handbook for Thomson Technology’s Automatic Genset Controller, the MEC 320. The document mainly includes functional descriptions, presentation of
display unit and menu structure, the procedure for parameter setup and complete standard
parameter lists.
The general purpose of the Reference Handbook is to provide useful overall information about the
functionality of the unit in the AMF/Load Take Over applications. This handbook also offers the
user the information he needs in order to successfully set up the parameters needed.
controller and the genhuman injury or damage to the equipment.
Intended users
The handbook is mainly intended for the person responsible for the unit parameter setup. In most
cases, this would be a panel builder designer. Naturally, other users might also find useful
information in this handbook.
Contents/overall structure
This Reference Handbook is divided into chapters and in order to make the structure of the
document simple and easy to use, each chapter will begin from the top of a new page. The
following will outline the contents of each of the chapters.
About this document
This first chapter includes general information about this handbook as a document. It deals with the
general purpose and the intended users of the Reference Handbook. Furthermore, it outlines the
overall contents and structure of the document.
Warnings and legal information
The second chapter includes information about general legal issues and safety precautions
relevant in the handling of Thomson Technology products. Furthermore, this chapter will introduce
note and warning symbols, which will be used throughout the handbook.
General product information
The third chapter will deal with the unit in general and its place in the Thomson Technology
product range.
Functional descriptions
This chapter will include functional descriptions of the standard functions as well as illustrations of
the Peak Plus application types. Flowcharts and single-line representations will be used in order to
simplify the information.
PM079 Rev 0 07/06/08 4 Thomson Technology
MEC 320 GENSET CONTROLLER
Display unit and menu structure
This chapter deals with the display unit including the push-button and LED functions. In addition,
the unit menu structure will be presented. Furthermore, the selection of unit mode and password
will be illustrated.
Additional functions
This chapter describes the additional functions of the unit.
Procedure for parameter setup
This chapter deals with the procedure to be followed, when the parameters are set up or changed.
By use of various illustrations this chapter will guide the user through the procedure for parameter
setup step by step.
Parameter list
This chapter includes a complete standard parameter list for setup. Therefore, this chapter is to be
used for reference, when information about specific parameters is needed.
PM079 Rev 0 07/06/08 5 Thomson Technology
MEC 320 GENSET CONTROLLER
The notes provide general information which will be helpful for the reader to
ult in
death, personal injury or damaged equipment, if certain guidelines are not
nd voltages. Do not touch any AC
2. Warnings and legal information
This chapter includes important information about general legal issues relevant in the handling of
THOMSON TECHNOLOGY products. Furthermore, some overall safety precautions will be
introduced and recommended. Finally, the highlighted notes and warnings, which will be used
throughout this handbook, are presented.
Legal information and responsibility
THOMSON TECHNOLOGY takes no responsibility for installation or operation of the generator set.
If there is any doubt about how to install or operate the generator set controlled by the unit, the
company responsible for the installation or the operation of the set must be contacted.
The units are not to be opened by unauthorized personnel. If opened anyway, the
Electrostatic discharge awareness
Sufficient care must be taken to protect the terminals against static discharges during the
installation. Once the unit is installed and connected, these precautions are no longer necessary.
warranty will be void.
Safety issues
Installing the unit implies work with dangerous currents and voltages. Therefore, the installation
should only be carried out by authorized personnel who understand the risks involved in working
with live electrical equipment.
Be aware of the hazardous live currents a
measurement inputs as this could lead to injury or death.
Definitions
Throughout this document a number of notes and warnings will be presented. To ensure that these
are noticed, they will be highlighted in order to separate them from the general text.
Notes
Warnings
bear in mind.
The warnings indicate a potentially dangerous situation which could res
followed.
PM079 Rev 0 07/06/08 6 Thomson Technology
MEC 320 GENSET CONTROLLER
Vision or the Graphical Display Unit (GDU) by use of a modem. To avoid
3. General product information
This chapter will deal with the unit in general and its place in the THOMSON TECHNOLOGY
product range.
Introduction
The MEC 320 is part of the THOMSON TECHNOLOGY product family.
The concept of the MEC 320 is to offer a cost-effective solution to gen-set builders, who need a
flexible generator protection and control unit for medium to large gen-set applications. Being part
of the THOMSON TECHNOLOGY product family, the standard functions can be supplemented
with a variety of optional functions.
Type of product
The Automatic Gen-set Controller is a micro-processor based control unit containing all
necessary functions for protection and control of a gen-set.
It contains all necessary 3-phase measuring circuits, and all values and alarms are presented on
the LCD display
PC utility software warning
It is possible to remote control the gen-set from the PC utility software M-
personal injury make sure that it is safe to remote control the gen-set.
PM079 Rev 0 07/06/08 7 Thomson Technology
MEC 320 GENSET CONTROLLER
4. Functional descriptions
This chapter includes functional descriptions of standard functions as well as illustrations of the
relevant application types. Flowcharts and single-line diagrams will be used in order to simplify
the information.
Standard functions
In the following paragraphs the standard functions are listed.
Operation modes
Automatic Mains Failure
•
Load take over
•
Engine control
Start/stop sequences
•
Fuel solenoid selection
•
Relay outputs for governor control
•
Protections (ANSI)
Overcurrent, 2 levels (51)
•
Reverse power (32)
•
4-20mA inputs
•
PT100 or VDO inputs
•
Digital inputs
•
Display
•
•
•
•
M-logic
•
•
•
Prepared for remote mounting
Push-buttons for start and stop
Push-buttons for breaker operations
Status texts
Simple logic configuration tool
Selectable input events
Selectable output commands
PM079 Rev 0 07/06/08 8 Thomson Technology
MEC 320 GENSET CONTROLLER
Automatic Mains Failure (with back sync. /
set
This section about applications is to be used for reference using the particular
set mode as starting point. It is not suitable for reading from beginning to
end.
Applications
The unit can be used for the applications listed in the table below.
Application Comment
Load take over Standard
Automatic Mains Failure (no back sync. /
Open Transition)
Automatic Mains Failure (with back sync. /
Closed Transition)
Gen-set mode Running mode
Load take over X X X X X
Automatic Mains Failure (no back sync. /
Open Transition)
Closed Transition)
gen-
Standard
Standard
Auto Semi Test Man Block
X X X X X
X X X X X
See mode overview in chapter 6 on page 46 for short description.
The flowcharts below illustrate the full functionality of the mentioned genmodes.
Load take over
Auto mode description
Back synchronizing ON (Closed Transition)
The purpose of the load take over mode is to transfer the load imported from the mains to the
gen-set for operation on generator supply only.
When the start command is given, the gen-set will start and synchronize the generator breaker
to the mains. When the generator breaker is closed, the imported load is decreased (the power
is being transferred to the gen-set), until the load is at the open breaker point. Then the mains
breaker opens.
When the stop command is given, the mains breaker is synchronized to the generator and after
closure the gen-set is deloaded, cooled down and stopped.
A 4-20mA transducer is used for indication of the power imported from the mains.
PM079 Rev 0 07/06/08 9 Thomson Technology
kW
Start signal Stop signal
Generator power
MB opens GB opens
t
The load take over mode can be combined with the short time parallel. In that
case, the generator and the mains breakers will never be closed at the same
set an alarm appears, and
set power, an alarm appears
Diagram, load take over - example
time for a longer period than the adjusted ‘short time parallel’ time.
If the imported load is higher than the nominal genand the load take over sequence is paused.
MEC 320 GENSET CONTROLLER
Mains power
Back synchronizing OFF (Open Transition)
When the start command is given, the gen-set will start. When the frequency and voltage is OK,
the mains breaker is opened and the generator breaker is closed. Now the generator supplies
the load, until the stop command is given. Then the generator breaker opens and the mains
breaker closes. The gen-set cools down and stops.
A 4-20mA transducer is used for indication of the power imported from the mains.
If the imported load is higher than the nominal genthe load take over sequence is paused.
Semi-auto mode
When the generator breaker is closed, and the mains breaker is opened, the unit will use the
nominal frequency as set point for the speed governor.
When the generator is paralleled to the mains, it will be controlled, so the imported power from
the mains will be kept at 0 kW.
See general semi-auto mode description on page 12.
Test mode description
See general test mode description valid for all gen-set modes on page 13.
Manual mode description
See general manual mode description valid for all gen-set modes on page 13.
PM079 Rev 0 07/06/08 10 Thomson Technology
MEC 320 GENSET CONTROLLER
Block mode description
AMF (no back Synchronization / Open Transition)
Auto mode description
The unit automatically starts the gen-set and switches to generator supply at a mains failure
after an adjustable delay time. It is possible to adjust the unit to change to gen-set operation in
two different ways.
In both cases, the generator breaker will be closed, when the generator voltage and frequency is
OK, and the mains breaker is open.
When the mains returns, the unit will switch back to mains supply and cool down and stop the
gen-set. The switching back to mains supply is done without back Synchronization (Open
Transition), when the adjusted ‘mains OK delay’ has expired.
See general block mode description valid for all gen-set modes on page 14.
1. The mains breaker will be opened at gen-set start-up.
2. The mains breaker will remain closed, until the gen-set is running, and the gen-set
voltage and frequency is OK.
Semi-auto mode description
When the generator breaker is closed, the unit will use the nominal frequency as the set point for
the speed governor.
Test mode description
Manual mode description
Block mode description
See general semi-auto mode description on page 12.
See general test mode description valid for all gen-set modes on page 13.
See general manual mode description valid for all gen-set modes on page 13.
See general block mode description valid for all gen-set modes on page 14.
PM079 Rev 0 07/06/08 11 Thomson Technology
MEC 320 GENSET CONTROLLER
ins failure mode can be combined with the short time parallel
function. In that case, the generator breaker and the mains breaker will never be
closed at the same time for a longer period than the adjusted ‘short time parallel’
AMF (with back Synchronization/Closed Transition)
Auto mode description
The unit automatically starts the gen-set and switches to generator supply at a mains failure
after an adjustable delay time. It is possible to adjust the unit to change to gen-set operation in
two different ways:
1. The mains breaker will be opened at gen-set start-up.
2. The mains breaker will remain closed until the gen-set is running and the gen-set
voltage and frequency is OK.
In both cases, the generator breaker will be closed, when the generator voltage and frequency is
OK, and the mains breaker is open.
When the mains returns, the unit will synchronize the mains breaker to the generator, when the
‘mains OK delay’ has expired. Then the gen-set cools down and stops.
The automatic ma
time.
Semi-auto description
When the generator breaker is closed and the mains breaker is opened, the unit will use the
nominal frequency as the set point for the speed governor.
When the generator is paralleled to the mains, the governor regulation will not be active.
Test mode description
Manual mode description
Block mode description
See general semi-auto mode description on page 12.
See general test mode description valid for all gen-set modes on page 13.
See general manual mode description valid for all gen-set modes on page 13.
See general block mode description valid for all gen-set modes on page 14.
PM079 Rev 0 07/06/08 12 Thomson Technology
MEC 320 GENSET CONTROLLER
auto is
lator is
General semi-auto mode description
The unit can be operated in semi-automatic mode. Semi-auto means that the unit will not initiate
any sequences automatically, as is the case with the auto mode. It will only initiate sequences, if
external signals are given.
An external signal may be given in three ways:
1. Push-buttons on the display are used
2. Digital inputs are used
3. Modbus command.
When the gen-set is running in semi-auto mode, the unit will control the speed governor.
The following sequences can be activated in semi-auto:
Command Description Comment
Start The start sequence is initiated and continues until the gen-
Stop The gen-set will be stopped. After disappearance of the
Close GB The unit will close the generator breaker, if the mains
Open GB The unit will ramp down and open the generator breaker at
Close MB The unit will close the mains breaker, if the generator
Open MB The unit opens the mains breaker instantly.
Manual
GOV UP
Manual
GOV DOWN
It is possible to manually increase and decrease the speed when semiselected. When the digital up/down input is activated, then the regu
deactivated as long as the manual up/down inputs are activated.
set starts or the maximum number of start attempts has
been reached. The frequency will be regulated to make the
GB ready to close.
running signal, the stop sequence will continue to be active
in the ‘extended stop time’ period. The gen-set is stopped
without cooling-down time.
When AMF mode
breaker is open, synchronize and close the generator
breaker, if the mains breaker is closed.
the breaker open point, if the mains breaker is closed.
breaker is open, synchronize and close the mains breaker,
if the generator breaker is closed.
The regulator is deactivated and the governor output is
activated as long as the GOV input is ON.
The regulator is deactivated and the governor output is
activated as long as the GOV input is ON.
is selected, the
unit will not regu-
late after breaker
closure.
PM079 Rev 0 07/06/08 13 Thomson Technology
MEC 320 GENSET CONTROLLER
If short time parallel is activated, the test will be terminated immediately after
set will cool down
and stop.
reaker or the mains breaker
in manual mode.
It is necessary to configure the digital inputs through the PC utility software to
use the manual commands. The number of configurable digital inputs is option
MAN mode cannot be selected, when AUTO mode is selected. To go from AUTO
General test mode description
The test mode function is activated by selecting test with the MODE push-button on the display
or by activating a digital input, if one of them is configured to ‘test’. The test mode will only test
synchronizing, if the ‘Sync. to mains’ function is enabled. If this is the case, the gen-set will start,
and the unit will synchronize and close the generator breaker to let the gen-set run in parallel,
until the test time expires. If the ‘Sync. to mains’ function is not activated, then the gen-set will
start and run at the nominal frequency with the generator breaker open.
The settings for the test function are set up in menu
Set point: Load set point when paralleling to mains.
•
Timer: Engine run time during the test period
•
Return: When the test is completed, the unit will return to the selected mode
•
(semi-auto or auto).
General manual mode description
When manual mode is selected, the gen-set can be controlled with digital inputs. The following
commands are possible:
the short time parallel time has expired. This means the gen-
Command Comment
Start Gen-set starts.
Stop Gen-set opens GB and stops
Manual increase speed Unit gives increase signal to
Manual decrease speed Unit gives decrease signal to
dependent.
It is not possible to open and close the generator b
to MAN it is necessary to go to SEMI-AUTO to make MAN available.
6540 Test running
without cooling-down.
speed governor.
speed governor.
.
PM079 Rev 0 07/06/08 14 Thomson Technology
MEC 320 GENSET CONTROLLER
ted from the local engine control panel, if such is
installed. Therefore, Thomson Technology recommends to avoid local
If block mode is selected using the display after the digital block input is
activated, the MEC 320 will stay in block mode after the block input is
e display. The block
mode can only be changed locally by display or digital input.
Before the running mode is changed it is important to check that persons are
The flowcharts below are for guidance only. For illustrative purposes the
General block mode description
When the block mode is selected, the unit is locked for certain actions. This means that it cannot
start the gen-set or perform any breaker operations.
To change the running mode from the display, the user will be asked for a password, before the
change can be made. It is not possible to select ‘block mode’, when running feedback is present.
The purpose of the block mode is to make sure that the gen-set does not start for instance
during maintenance work.
If the digital inputs are used to change the mode, then it is important to know that the input
configured to block mode is a constant signal. So, when it is ON the unit is in a blocked state,
and when it is OFF, it returns to the mode it was in before block mode was selected.
deactivated. The block mode must now be changed using th
clear of the gen-set and that the gen-set is ready for operation.
Alarms are not influenced by block mode selection.
The gen-set can be star
cranking and starting of the gen-set.
Flowcharts
Using flowcharts, the principles of the most important functions will be illustrated in the next
sections. The functions included are:
Mode shift
•
MB open sequence
•
GB open sequence
•
Stop sequence
•
Start sequence
•
MB close sequence
•
GB close sequence
•
Load take over
•
Automatic Mains Failure
•
Test sequence
•
flowcharts are simplified in some extent.
PM079 Rev 0 07/06/08 15 Thomson Technology
Mode shift
MEC 320 GENSET CONTROLLER
Start
Mode shift
enabled
Yes
Load take over
and AMF
Yes
mains failure
Yes
initiate AMF
sequence
No
No
No
No
mains OK timer
timed out
PM079 Rev 0 07/06/08 16 Thomson Technology
Yes
initiate mains
return
sequence
MB close
sequence
continue in
selected mode
END
MB open sequence
MB closed
load take over
Yes
MEC 320 GENSET CONTROLLER
Start
No
Yes
No
mains failure
deload MB
load = 0
Yes
open MB
MB opened
Yes
No
No
No
load too high
alarm 'MB
open failure'
Yes
alarm
PM079 Rev 0 07/06/08 17 Thomson Technology
END
GB open sequence
MEC 320 GENSET CONTROLLER
Start
stop conditions
OK
Yes
is GB closed
Yes
Soft open
Yes
deload DG
load< open set
point
No
No
No
No
fail class
shutdown
No
ramp down
timer expired
PM079 Rev 0 07/06/08 18 Thomson Technology
Yes
open GB
No
GB opened Alarm
Yes
end
Yes
Stop sequence
MEC 320 GENSET CONTROLLER
Start
No
stop
conditio
ns OK
Yes
GB open
seq OK
Yes
AUTO
mode
cooldown
timer run
out
Yes
No
No
No
Yes
run coil
Yes
deactivate
'stop' relay
genset
stopped
Yes
end
No
stop relay
activate stop
relay
No
alarm
PM079 Rev 0 07/06/08 19 Thomson Technology
Start sequence
No
Start
start condition
OK
Yes
start prepare
timer
Yes
Start relay ON
start relay timer
timeout
Yes
off relay ON
stop relay timer
timed out
Yes
max start
attempts
Yes
Start failure
alarm
MEC 320 GENSET CONTROLLER
No
No
No No
genset started
Yes
run feedback
detected
No
f/U OK
ready to close
GB
end
No
Alarm
Yes
No
Yes
PM079 Rev 0 07/06/08 20 Thomson Technology
MB close sequence
alarm GB open
is MB open
voltage on
mains/bus
voltage on gen
Yes
GB cl osed
Yes
back sync ON
Yes
sync MB
synchronised
Yes
close MB
MB closed
Yes
Start
end
Yes
Yes
No
No
No
No
No
No
No
MEC 320 GENSET CONTROLLER
direct cl ose OK
No
Yes
No
sync ti mer
runout
Yes
close failure
alarm
GB open
sequence
alarm sync.
failure
failure
PM079 Rev 0 07/06/08 21 Thomson Technology
GB close sequence
Start
is GB open
Yes
No
Start seq OK
No
Yes
single DG
application
No
Yes
island mode
voltage on bus
No
Yes
No
Yes Yes
MB close
MEC 320 GENSET CONTROLLER
No
voltage on
busbar
Yes
MB open
No
DG freq match
No
All GBs OFF
Yes
TB Present
Yes
TB open
Yes
No
No
No
Yes
direct closing
OK
Sync GB
BB freq
Yes
close GB
GB closed alarm
Yes
end
time runout
No
No
No
Yes
alarm sync
failure
PM079 Rev 0 07/06/08 22 Thomson Technology
Load take over
Start
Activate start
input
start sequence
MEC 320 GENSET CONTROLLER
GB close
sequence
Mains load
= 0 kW
Yes
MB open
sequence
deactivate start
input
No
ramp-up
genset load
genset
operation
MB close
sequence
PM079 Rev 0 07/06/08 23 Thomson Technology
GB open
sequence
stop sequence end
Automatic Mains Failure
Start
MEC 320 GENSET CONTROLLER
mains failure
No
Yes
eng+open MB
#6595: start
No
Yes
open MB
start sequence
open MBstart sequence
GB close
sequence
GB close
sequence
No
mains ok
Yes
time out
MB close
sequence
end
PM079 Rev 0 07/06/08 24 Thomson Technology
Test sequence
Start
select test
mode
start sequence
test timer
timer run out
Yes
stop sequence
engine stopped
No
return to
running mode,
menu 6544
end
MEC 320 GENSET CONTROLLER
No
No
engine running
Yes
No
freq/voltage OK
Yes
Sync of GB
allowed
Yes
sync GB
ramp up to P
set point
No
PM079 Rev 0 07/06/08 25 Thomson Technology
MEC 320 GENSET CONTROLLER
1 2
OFF
OFF
formation about the required breaker
wiring.
Sequences
The following contains information about the sequences of the engine, the generator breaker
and, the mains breaker. These sequences are automatically initiated if the auto mode is
selected, or if the commands are selected in the semi-auto mode.
In the semi-auto mode the selected sequence is the only sequence initiated (e.g. press the
START push-button: The engine will start, but no subsequent synchronizing is initiated).
The following sequences will be illustrated below:
START sequence
•
STOP sequence
•
Breaker sequences
•
START sequence
The drawings illustrate the start sequences of the gen-set.
Refer to our ‘Application Notes’ for in
Start sequence:
Run coil
Start attempts
Running feedback
PM079 Rev 0 07/06/08 26 Thomson Technology
MEC 320 GENSET CONTROLLER
1 2
Start sequence:
Stop coil
Stop output
Start attempts
Running feedback
4 different types of running feedback can be used to detect if the motor is running. Refer to
menu 4300 for selection of the running feedback type.
The running detection is made with a built-in safety routine. The running feedback selected in
menu 4300 is the primary feedback. At all times all the types of running feedback is used for
running detection. If for some reason the primary choice is not detecting any running feedback,
the starter relay will stay activated for additionally 1 second. If a running feedback is detected
based on one of the secondary choices, the gen-set will start. This way the gen-set will still be
functional even though a tacho sensor is damaged or dirty.
As soon as the gen-set is running, no matter if the gen-set is started based on the primary or
secondary feedback, the running detection will be made based on all 4 types.
The sequence is shown in the diagram below.
PM079 Rev 0 07/06/08 27 Thomson Technology
MEC 320 GENSET CONTROLLER
1 2
OFF
OFF
3
Running feed
back
OFF
OFF
1
sec
t
Alarm
Start attempts
Primary Running
Running feedback error:
Run coil
Secondary
Engine running
PM079 Rev 0 07/06/08 28 Thomson Technology
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