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INDEX
INDEX .............................................................................................................................................................................................. 1
1 GENERAL ....................................................................................................................................................................................... 2
1.1 APPLICATION AREA ................................................................................................................................................................................ 2
1.2 OVERVIEW .......................................................................................................................................................................................... 2
2. SAFETY ......................................................................................................................................................................................... 2
2.1 GENERAL ............................................................................................................................................................................................ 2
2.2 SAFETY INSTRUCTIONS ........................................................................................................................................................................... 2
3. CONNECTIONS ............................................................................................................................................................................. 3
3.1 CONNECTION TO PC .............................................................................................................................................................................. 3
3.1.1 Connecting with RS232 serial port .......................................................................................................................................... 3
3.1.2 Connecting with Bluetooth ...................................................................................................................................................... 3
3.1.3 Create a Bluetooth connection ................................................................................................................................................ 3
3.1.4 Troubleshoot Bluetooth connection ........................................................................................................................................ 5
3.1.5 Remove the Bluetooth connection .......................................................................................................................................... 5
3.1.6 Installing Bluetooth adapter on a laptop that already has Bluetooth. .................................................................................... 6
3.1.7 Connecting with Ethernet (Requires BTS11 V1.6 or later) ....................................................................................................... 6
3.2 CONNECTION TO BREAKER POLES. ............................................................................................................................................................. 7
3.2.1 Connection for single phase and one contact element/phase ................................................................................................. 7
3.2.2 Connection for single phase and two contact element in series/phase................................................................................... 7
3.2.3 Connection for 3-phases with two contact element in series/phase ....................................................................................... 8
4. OPERATION .................................................................................................................................................................................. 9
4.1 PREPARATION ...................................................................................................................................................................................... 9
4.2 OPEN TEST WINDOW ............................................................................................................................................................................. 9
4.3 STATIC RESISTANCE MEASUREMENT ......................................................................................................................................................... 10
4.4 DYNAMIC RESISTANCE MEASUREMENT ..................................................................................................................................................... 10
5. TROUBLE SHOOTING .................................................................................................................................................................. 11
5.1 NOT RECOGNIZE DCM UNITS ................................................................................................................................................................ 11
5.2 NO TRIG ........................................................................................................................................................................................... 11
5.3 NO MEASUREMENT ............................................................................................................................................................................. 11
6. MAINTENANCE........................................................................................................................................................................... 11
6.1 BEFORE USE OR ACCORDING TO COMPANY POLICY ...................................................................................................................................... 11
6.2 CHECK EVERY 12 MONTHS OR ACCORDING TO COMPANY POLICY .................................................................................................................... 11
7. CHECK AND ADJUSTMENT .......................................................................................................................................................... 11
7.1 CALIBRATION APPROVAL ....................................................................................................................................................................... 11
7.2 SERVICE WINDOW DCM ..................................................................................................................................................................... 12
7.3 CALIBRATION WINDOW ........................................................................................................................................................................ 12
7.4 CALIBRATION WIZARD - VOLTAGE INPUTS ................................................................................................................................................. 12
7.4.1 Voltage calibration- Step 2 .................................................................................................................................................... 12
7.4.2 Voltage calibration- Step 3 .................................................................................................................................................... 13
7.4.3 Voltage calibration- Step 4 .................................................................................................................................................... 13
7.4.4 Voltage calibration- Step 5 .................................................................................................................................................... 13
7.5 CALIBRATION WIZARD – CURRENT OUTPUTS (RESISTANCE) ........................................................................................................................... 13
7.5.1 Current calibration - Step 3 ................................................................................................................................................... 13
7.5.2 Current calibration - Step 4 ................................................................................................................................................... 14
7.5.3 Current calibration - Step 5 ................................................................................................................................................... 14
8. TRANSPORTATION/SCRAPPING/RECYCLING............................................................................................................................... 14
9. SPECIFICATIONS ......................................................................................................................................................................... 15
9.1 DCM CU TECHNICAL SPECIFICATION ...................................................................................................................................................... 15
9.1.2 DCM CU Accessories Included ............................................................................................................................................... 16
9.2 DCM 2 TECHNICAL SPECIFICATION ......................................................................................................................................................... 17
9.2.1 DCM 2 Accessories Included .................................................................................................................................................. 17
9.3 DECLARATION OF CONFORMITY.................................................................................................................................................... 18
10. REVISIONS ................................................................................................................................................................................ 18
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1 GENERAL
1.1 APPLICATION AREA
The DCM units are used to perform dynamic contact measurements for High Voltage Circuit Breakers in sub stations with both side
grounded.
Static resistance measurement can also be performed for breakers with two contact element in series, both side grounded and the
middle point not grounded.
To be able to perform Static resistance measurement for breakers with one breaking element, only one side can be grounded.
1.2 OVERVIEW
The test equipment for Dynamic contact measurement consists of one DCM-CU unit and from one up to three DCM-2 units. That
means up to 6 contact elements can be tested at the same time.
DCM-CU unit handles the communication between the PC, external switch analyser and DCM-2 unit(s). It also charge two capacitors
(super cap) in each DCM-2 unit that is used to give a high measurement current during operation.
DCM-2 unit(s) handles the output of the current and sample the current values and voltage drop values during the operation. After
the operation has been done the current and voltage drop curves are downloaded to the PC-software for further evaluation.
2. SAFETY
Important!
2.1 GENERAL
This instrument shall only be used by authorized and educated personnel.
It’s the operators responsible to read and follow all operating and safety instructions for connecting and using this instrument.
Always keep the below safety instructions in mind when using the instrument.
2.2 SAFETY INSTRUCTI ONS






Local safety regulations.
Always follow local safety regulations for work on high-voltage circuit breakers.
Ground connection
The DCM units can only be used in electrical system with single grounds.
If there is a High voltage ground and Low voltage ground make sure that there is no potential voltages difference between these
grounds. If that’s not the case, consult local safety regulations.
Always connect the separate ground terminal on DCM-2 to protective ground before any other connections. Check that the
separate protective ground wire is in good condition before connection.
Make sure that the power socket for mains is a grounded outlet and that the power cable is in good condition before connecting
the main power to the control unit DCM-CU.
Connections to the instrument.
All cables to the DCM units shall first be connected to the DCM-units (DCM-CU and DCM-2) before any connections to the test
object.
Only use original cables for connection and make sure that the cables are in good conditions.
Before any connections to the high voltage circuit breaker.
Make sure that the breaker is in Close position and disconnected from the line at both sides.
Make sure that breaker is grounded on both sides.
Make sure that any remote control device is disconnected from the control circuits of the breaker.
Make first connection to the breaker poles before any connections to the breaker mechanism.
Connections in general
Take care when working near bare connectors and bus bars. Contact with a conductor may cause an electrical shock. Take special
care at wet conditions.
Surrounding personal
Make sure that surrounding personal can’t touch the breaker during a test
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3. CONNECTIONS
Important!
Read safety instruction chapter 2. SAFETY before any connections
3.1 CONNECTION TO PC
PC
DCM CU
DCM 2 UNIT 1
BREAKER POL A
DCM 2 UNIT 2
BREAKER POL B
DCM 2 UNIT 3
BREAKER POL C
BREAKER CLOSE COIL
SWITCH
ANALYSER
BREAKER TRIP COIL
BREAKER MOTOR
Take the supplied Serial connection cable DB9 of DCM CU and connect the
DB9 Male connector to RS232 port of the Switch Analyser and connect the DB9
connector to RS232 TO SWITCH ANALYSER port of DCM CU.
Connection between PC and DCM CU can be done in one of three ways.

See chapter 3.1.1 Connecting with RS232 serial port

See chapter 3.1.2 Connecting with Bluetooth

See chapter 3.1.7 Connecting with Ethernet (Requires BTS11 V1.6 or later)
Female
3.1.1 CONNECTING WIT H RS232 SERIAL PORT
Take the supplied Serial connection cable DB9 of DCM CU and connect the DB9 Female connector to RS232 port of the PC computer
and connect the DB9 Male connector to RS232 TO COMPUTER port of DCM CU
3.1.2 CONNECTING WIT H BLUETOOTH
When the driver is installed you can select the Bluetooth Serial
port (COMXXX) in the serial communication list
3.1.3 CREATE A BLUETOOTH CONNECTION
Right-click the Bluetooth
icon in the status bar.
If no Bluetooth icon appears, click the arrow
to show all
hidden icons.
If you still cannot find the Bluetooth icon, your computer is
probably not equipped with Bluetooth.
Click Show Bluetooth Devices
Click Add a device
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Select DCM-XXXX * and click Next.
DCM connected.
If no DCM-XXXX * found verify that DCM-XXX is turned on and
that you are not too far away from the unit (< 100 meters clear
sight).
* XXXX is the serial number on the unit.
DCM-0001
Now the Bluetooth device is paired with a code.
If your computer is equipped with Bluetooth version 2.1 and
later, paired the devices together automatically with a code
(see picture).
O.B.S! If you have an older version of Bluetooth than 2.1, you
must enter the pairing code to DCM.
The code you enter is 1234.
Click Next to continue.
DCM-0001
When the wizard is finished, you can close the wizard by
clicking the Close button.
DCM-0001
To find out which COM port that DCM got right click on DCMXXXX and click Properties.
Click on the Services tab.
Note the COM port DCM got (COMXXX).
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3.1.4 TROUBLESHOOT BLUETOO TH CONNECTION
Right click on DCM-XXXX and click
Troubleshoot.
Follow the instructions in the wizard.
3.1.5 REMOVE THE BLUETOOTH CONNECTION
Right click on DCM-XXXX and click Remove
device.
Click Yes in the dialog box to remove the
connection.
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3.1.6 INSTALLING BLUETOOTH ADAPTER ON A LAPTOP THAT ALREADY HAS BLUETOOT H.
Two Bluetooth adapters may not interact with Windows.
Therefore, the internal adapter needs to be disabled
before the USB Bluetooth adapter in connected.
Right-click the driver for your Bluetooth Receiver.
Open Device Manager by clicking the Start button ,
Control Panel, System and Security and then click Device
Manager under System.
If you are prompted for an
administrator password or confirmation, follow the
prompt.
Expand Bluetooth Radios.
Click Disable to disable the device. Click Yes in the
following dialog.
Then connect the Bluetooth USB Adapter to your
computer's USB port.
A new Bluetooth adapter together with Microsoft
Bluetooth Enumerator will be shown under Bluetooth
Radios
3.1.7 CONNECTING WITH ETHERNET ( REQUIRES BTS11 V1.6 OR L ATER)
At the moment Ethernet connection is not available. This will be added in BTS11 V1.6
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3.2 CONNECTION TO BR EAKER POLES.
3.2.1 CONNECTION FOR SINGLE PHASE AND ONE CONTACT ELEMENT/PHASE
Take the connection cable DCM-2 and Connect the M12, 8 pole
Female connector to DCM UNIT 1 plug on DCM CU, connect the
M12, 8 pole Male connector to CONNECT TO CONTROL UNIT plug
on DCM 2.
Attach DCM2 to the breaker base with the supplied straps.
Connect the connection cable, breaker base to – CURRENT and –
SENSE. Attach the clamp of the connection cable, breaker base to
the pole of breaker base.
Connect the connection cable, breaker T element to + CURRENT 1
and + SENSE 1. Attach the clamp of the connection cable, breaker
T element to the pole of breaker element.
DCM2
DCM CU
3.2.2 CONNECTION FOR SINGLE PHASE AND TWO CONTACT ELEMENT IN SERIES/PHASE.
Take the connection cable DCM-2 and Connect the M12, 8 pole
Female connector to DCM UNIT 1 plug on DCM CU, connect the
M12, 8 pole Male connector to CONNECT TO CONTROL UNIT plug
on DCM 2.
Attach DCM2 to the breaker base with the supplied straps.
Connect the connection cable, breaker base to – CURRENT and –
SENSE. Attach the clamp of the connection cable, breaker base to
the pole of breaker base.
Connect the connection cable, breaker T element to + CURRENT 1
and + SENSE 1. Attach the clamp of the connection cable, breaker
T element to the pole of left breaker T element.
Connect the connection cable, breaker T element to + CURRENT 2
and + SENSE 2. Attach the clamp of the connection cable, breaker
T element to the pole of right breaker T element.
DCM2
UNIT 1
DCM CU
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3.2.3 CONNECTION FOR 3-PHASES WITH TWO CONT ACT ELEMENT IN SERIE S/PHASE
A
B
C
DCM2
UNIT 1
DCM2
UNIT 2
DCM2
UNIT 3
DCM CU
Take the connection cable DCM-2 and
Take the connection cable DCM-2 and
Take the connection cable DCM-2 and
Connect the M12, 8 pole Female connector Connect the M12, 8 pole Female connector Connect the M12, 8 pole Female connector
to DCM UNIT 1 plug on DCM CU, connect to DCM UNIT 2 plug on DCM CU, connect to DCM UNIT 3 plug on DCM CU, connect
the M12, 8 pole Male connector to
the M12, 8 pole Male connector to
the M12, 8 pole Male connector to
CONNECT TO CONTROL UNIT plug on DCM CONNECT TO CONTROL UNIT plug on DCM CONNECT TO CONTROL UNIT plug on DCM
2.
2.
2.
Attach DCM2 to the breaker pole A base
Attach DCM2 to the breaker pole B base
Attach DCM2 to the breaker pole C base
with the supplied straps.
with the supplied straps.
with the supplied straps.
Connect the connection cable, breaker
Connect the connection cable, breaker
Connect the connection cable, breaker
base to – CURRENT and – SENSE. Attach the base to – CURRENT and – SENSE. Attach the base to – CURRENT and – SENSE. Attach the
clamp of the connection cable, breaker
clamp of the connection cable, breaker
clamp of the connection cable, breaker
base to the pole of breaker base.
base to the pole of breaker base.
base to the pole of breaker base.
Connect the connection cable, breaker T Connect the connection cable, breaker T Connect the connection cable, breaker T
element to + CURRENT 1 and + SENSE 1.
element to + CURRENT 1 and + SENSE 1.
element to + CURRENT 1 and + SENSE 1.
Attach the clamp of the connection cable, Attach the clamp of the connection cable, Attach the clamp of the connection cable,
breaker T element to the pole of left
breaker T element to the pole of left
breaker T element to the pole of left
breaker T element.
breaker T element.
breaker T element.
Connect the connection cable, breaker T Connect the connection cable, breaker T Connect the connection cable, breaker T
element to + CURRENT 2 and + SENSE 2.
element to + CURRENT 2 and + SENSE 2.
element to + CURRENT 2 and + SENSE 2.
Attach the clamp of the connection cable, Attach the clamp of the connection cable, Attach the clamp of the connection cable,
breaker T element to the pole of right
breaker T element to the pole of right
breaker T element to the pole of right
breaker T element.
breaker T element.
breaker T element.
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4. OPERATION
REMARK! All connections for testing according to chapter 3. CONNECTIONS assumed were performed.
The user is assumed to be familiar with the PC-software BTS11.
Se User manual BTS11 for more information of the PC-software.
4.1 PREPARATION
Read Safety instructions in chapter 2. SAFETY before any connections.
Make connections for DCM measurement as described in chapter 3. CONNECTIONS
Start the PC-software BTS11
See User manual BTS11 for creating a test object and preparing for a test
4.2 OPEN TEST WINDOW
Open the test window for
selected test.
Note! The test described below
is done for one phase with two
contact elements.
There are 3 command buttons
for operations that can be used
with the DCM units
“Static pole res.” Perform a
static resistance measurement
on a closed contact element.
Selection of phase and contact
element are done before the
measurement take place.
“DCM at Open”
Perform a
dynamic resistance/contact
measurement at an OPEN
operation. Selection of phase
and contact element are done
before the measurement take
place. The trig signal for start of measurement is taken from the output voltage to the Trip coil.
“DCM at Close”
Perform a dynamic resistance/contact measurement at a CLOSE operation.
Selection of phase and contact element are done before the measurement take place. Trig signal for start of measurement is taken
from the output voltage to the Close coil.
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4.3 STATIC RESISTANCE ME ASUREMENT
Pressing the command button “Static pole res.” opens a
selection window for selection of phase and contact element.
TEST PROCEDURE
 Select phase (if more than 1 phase) and contact
elements to be tested in the selection boxes.
 Press command button “Test” to execute the test.
RESULT AFTER TEST
4.4 DYNAMIC RESISTANCE MEASUREMENT
Pressing the command button “DCM at Open” or “DCM at Close” opens a selection window for
selection of phase and contact element.
TEST PROCEDURE:
•
Select phase (if more than 1 phase) and contact elements to be tested in the selection
boxes.
•
Press command button “Ok” to open the operation window
OPERATION WINDOW.
•
Press command button “Operation” (when enabled) to execute an
“Open” operation
Result after DCM operation at Open
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5. TROUBLE SHOOTING
Trouble shooting must only be performed by authorized and educated personnel.
5.1 NOT RECOGNIZE DCM UNITS
-
Check that the DCM-CU has main power
Check communication cable/connectors between PC and DCM-CU
Check communication cable/connectors between Switch analyser (SA10) and DCM-CU
5.2 NO TRIG
-
Check communication cable/connectors between DCM-CU and DCM-2
5.3 NO MEASUREMENT
-
Check cables/connectors for high current and voltage drop measurement
6. MAINTENANCE
Note!
Service and maintenance must only be performed by authorized and educated personnel.
6.1 BEFORE USE OR ACCORD ING TO COMPANY POLIC Y
Maintenance
Visual check of condition for cables and cable connectors
Visual check of condition for connectors at DCM units
Solution
Replace cable(s) or/and connector(s) with new if any damages
are found
Send the unit for repair if any damages are found.
6.2 CHECK EVERY 12 MONTHS OR ACCORDING TO COMPANY POLICY
Maintenance
Visual check of condition for cables and cable connectors
Visual check of condition for connectors at DCM units
Perform calibration of unit.
Solution
Replace cable(s) or/and connector(s) with new if any damages
are found
Send the unit for repair if any damages are found.
See chapter 7. Check and adjustment for check and calibration
of DCM units. Or send the unit to ELCON AB for calibration.
7. CHECK AND ADJUSTMENT
Note! Check and adjustments must only be performed by authorized and educated personnel.
Check and adjustments of DCM-2 are done with the PC-software BTS11. The personnel that are allowed to make checks and
calibration described in this chapter 7. Check and adjustment are assumed to familiarly with the PC-software BTS11. Refer to BTS11
User manual for operating instructions. Select Menu “Service” and function “DCM-unit” to get to the service window for DCM-2
All analogue inputs on the DCM-2 are software calibrated.
Calibration can easy be done from a calibration wizard.
All calibration constants and password for changing constants are saved in the DCM-2 unit.
Note! Password to save new calibration at delivery is “elcon”
Instrument needed
•
Variable DC-voltage source: ± 0.125V DC, ± 1.25 VDC
•
Voltage instrument:
± 1.25 VDC accuracy ± 0,02%
•
Reference resistance
100 -500 ohm, accuracy <= 0.5%
Principle of calibration
•
Two points are measured at about 10 respective about 90% of full scale.
•
The values are measured with both the DCM-2 and a connected reference instrument.
•
With use of the equation for a straight line the new calibration constants are calculated.
IMPORTANT!
•
All voltage inputs and current outputs must be checked/calibrated.
•
All voltage inputs must be checked/calibrated before Current outputs (resistance).
•
(The voltage inputs are used as reference when calibrate the current outputs).
7.1 CALIBRATION APPROVAL
Voltage inputs “Sense 1”, “Sense 2”
Approval: range 0-0.125V = 0.1 mV
Approval: range 0 -1.25V = 1.0 mV
Current/Resistance measurement “Current 1”, “Current 2”
Make a resistance measurement on a calibrated resistance.
Approval: range 0-600 ohm   2 ohm
Approval: range 0-5000 ohm   20 ohm
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7.2 SERVICE WINDOW DCM
Preparations:
 Make connections as for a normal measurement
(Single pole).
See chapter 3.2.1 Connection for single phase and
one contact element/phase for connections. Replace
breaker element with a calibrated current shunt.
 Turn on the Switch analyser
 Start BTS11 software
 Click Menu “Service” and click function “DCM-unit
The Service window for DCM-unit will be displayed:

 Click tab for DCM-2 unit to be calibrated
 Press command button “Calibrate” to get to the
calibration window
7.3 CALIBRATION WINDOW
This window gives some general information of the connected DCM
unit and the current used calibration constants. It also give the
possibility to the user to set its own instrument number, set new
password for calibration and start a calibration guide.
The calibration constants can be change directly in the text boxes and
saved with the “Save” button.
It is strongly recommended that you use the command button
“Calibration wizard” to make calibration instead of just changing the
calibration constants in the test boxes.
Command buttons:
“New Password” Change of current password (The password is
saved in DCM-2)
“Customer Settings”
Set a customer instrument number.
“Calibration Wizard”
Start a calibration guide
“Save” Save changed calibration constants to DCM-2
“Print” Print all calibration constants for DCM-2 on a connected
printer.
Tip! Always printout a protocol after a calibration.
“Cancel” Cancel the calibration guide.
The calibration procedure is almost the same for all inputs.
Press the command button Calibration Wizard to start the calibration guide.
Follow the instructions for each dialogue box.
7.4 CALIBRATIO N WIZARD - VOLTAGE INPUTS
After pressing the command button “Calibration Wizard” the window for the first
step will be displayed. This window is used to select input(s) that shall be
calibrated.
•
Select the option button for the voltage input(s) you like to
calibrate.
It’s recommended for voltage inputs that you calibrate both inputs
“Sense 1+2” at the same time. It will save calibration time!
Important!
Voltage inputs must be calibrated before current outputs. (The voltage inputs are
used as reference when calibrate the current outputs)
7.4.1 VOLTAGE CALIBRATION- STEP 2
This window is used to inform the user of the voltage source that must be
available and where the connection shall be done.
•
Connect the variable voltage source and press button “Next” to
continue
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7.4.2 VOLTAGE CALIBR ATION- STEP 3
This window is used to inform the user of the voltage setting and allow the user to
type the value read from the connected reference instrument. The instrument box
shows the current read value from DCM-2
•
•
•
Adjust the voltage source to the recommended voltage level
Be aware of the sign of the voltage level
Read the value from the reference instrument and type the value
in the text box
Press button next to continue
7.4.3 VOLTAGE CALIBRATION- STEP 4
This window is the same as previous step. This time you shall set the second
voltage value.
•
•
•
Adjust the voltage source to the recommended voltage level
Be aware of the sign of the voltage level
Read the value from the reference instrument and type the value
in the text box
Be aware of the sign of the voltage level
Press button “Next” to continue
7.4.4 VOLTAGE CALIBR ATION- STEP 5
This window shows the measurement result and allows the user to Save or Cancel
the calibration.
The instrument box shows the current read value with use of the new calculated
calibration constants
•
•
Press “Save” button to save the new calibration constants,
a window will pop-up where you type the password (“elcon” at
delivery), date and signature.
After the calibration constants are saved the same window appear
again where you can choose if you like to “Re-calibrate” or “Close”
the calibration guide.
Press button “Cancel” to close the calibration without saving new calibration constants.
7.5 CALIBRATION WIZARD – CURRENT OUTPUTS (RESISTANCE)
After pressing the command button “Calibration Wizard” the window for the first
step will be displayed. This window is used to select input(s) that shall be
calibrated.
An indirect method is used for current calibration.
The voltage inputs and a calibrated current shunt are used as reference at
calibration of current.
•
Select the option button for the current output you like to calibrate.
IMPORTANT!
It is required that the voltage inputs are calibrated before calibration of current.
See chapter 7.4 Calibration wizard - Voltage inputs for calibration of voltage
inputs.
7.5.1 CURRENT CALIBRATION - STEP 3
This window is used to inform the user about the connection of the reference
resistance.
The instrument box shows the current read value from DCM-2
•
Disconnect any connected resistance to the current terminals
(Open circuit)
•
Press button “Next” to continue.
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7.5.2 CURRENT CALIBRATION - STEP 4
This window is used to inform the user about the connection of the reference
resistance
•
Make connections for an ordinary resistance measurement.
Connect a reference resistance (100 – 500 ohm) to the current output
cables.
Connect the voltage measurement points on the reference resistor to
the corresponding voltage inputs on the DCM-2
•
Type the value of the reference resistor in the text box
• Press button “Next” to make “an ordinary” resistance measurement.
7.5.3 CURRENT CALIBRATION - STEP 5
This window shows the measurement result and allows the user to Save or Cancel
the calibration.
•
Press “Save” button to save the new calibration constants.
A window will pop-up where you type the password “elcon”, date
and signature.
After the calibration constants are saved the same window appear
again where you can choose if you like to “Re-calibrate” or “Close”
the calibration guide.
•
Press button “Cancel” to cancel the calibration without saving new
calibration constants
•
8. TRANSPORTATION/SCRAPPING/RECYCLING
Before transportation remove all cables from DCM-CU and DCM-2 units when moving/transportation the equipment.
Put the units and cables in intended locations in the test case
Scrapping/Recycling of replaced components shall be done according to local rules and laws
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9. SPECIFICATIONS
The DCM units are used to perform dynamic contact measurements for High Voltage Circuit Breakers in sub stations with both side
grounded.
Static resistance measurement can also be performed for breakers with two contact element in series, both side grounded and the
middle point not grounded.
To be able to perform Static resistance measurement for breakers with one breaking element, only one side can be grounded.
9.1 DCM CU TECHNICAL SPECIFICATION
Power supply
Quantity
Marked
Connector type
Fuses
Voltage range
1
“Input”
IEC 950 entry module
2*2A slow
100 - 240VAC, 50/60 Hz, Max70W
Control output
Quantity
Marked
Connector type
Standard
Manufacturer
Output voltage
Max output current
Communication
Trig signal
3
“DCM UNIT 1”,“DCM UNIT 2”,“DCM UNIT 3”
M12, 8 pole Female
IEC 61076-2-101
Phoenix contact
18-24VDC
2.5A
RS485, baud rate 921.6 K Baud
5-24VDC
Communication PC
Quantity
Marked
Connector type
Communication type
Isolation
1
“RS232 TO COMPUTER”
9-pole D-sub, female
RS232, baud rate 115.2 K Baud
1000 V DC
Communication SA
Quantity
Marked
Connector type:
Communication type:
Isolation:
1
“RS-232 TO SWITCH ANALYZER”
9-pole D-sub, male
RS232, baud rate 115.2 K Baud
1000 V DC
Communication Network
Quantity
Marked
Connector type:
Communication type:
1
“ETHERNET”
RJ45
ETHERNET 100 Mb/s
Communication Bluetooth
Quantity
Marked
Connector type
Communication type
Communication protocols
Scope
Baud rate
Data size
Parity
Stop bits
Flow control
1
“BLUETOOTH”
BLUETOOTH ANTENNA SMA MALE
Serial communication via Bluetooth ® version 2.1
Support for version 2.1 + Enhanced Data Rate (EDR)
Backward compliant with Bluetooth version 2.0, 1.2, 1.1
< 100 meters (Line of sight)
115.2 K baud
8-bit
None
1
None
Dimensions
Weight
Operating temperature
Storing temperature
Relative humidity
Altitude operating
Altitude non-operating
165*50*175 (With*Height*Depth)
about 1.2 kg
-20 - 40 °C
-20 - 70 °C
20 - 85% non-condensing
< 2 000 m
< 12 000 m
Environment
Nyhammar Sweden
Revision 1
2015-04-30
Go to INDEX.
D.C.M Dynamic Contact Measurement User manual
page 16(18)
9.1.2 DCM CU ACCESSORIES I NCLUDED
Mains power connection
Quantity
Description
Type
Length
Supplier
Order number
1
Standard Europe mains power cord
CEE 7/7 to IEC 60320 C13 250V/10A, L=2m
2 meters
ELCON AB
Ferrite for mains power cord
Quantity
Description
Value
Manufacturer
Part number
Weight
Supplier
Order number
1
Broadband EMI Ferrite Split/Snap-On Core in Plastic Cases
240 Ω @ 100MHz
Laird Technologies
28A0640-0A2
24 Grams
ELCON AB
Serial connection cable DB9
Quantity
Description
Length
Supplier
Order number
2
Standard RS232 cable DB9 male/female
2 meters
ELCON AB
Bluetooth antenna
Quantity
Description
Value
Manufacturer
Part number
Frequency
Gain
Polarization
Nominal Impedance
VSWR
Size
Supplier
Order number
2
Broadband RP-SMA
240 Ω @ 100MHz
Laird Technologies
MAF94028-WRR2400-RPSMA-B
2.4 – 2.5 GHz
1.3 dBi (2.45 GHz)
Vertical, Omnidirectional
50 ohms
2:1 max across all bands
Length 10.9 cm @ 180° or 8.8 cm @ 90°
ELCON AB
USB Bluetooth 2.1 EDR stick
Quantity
Description
Manufacturer
Part number
Connector type
Communication type
Communication protocols
1
BLUETOOTH 2.1 USB ADAPT, CLS1, ANT, IVT
LM TECHNOLOGIES
LM540-0546
USB2 and BLUETOOTH ANTENNA SMA MALE
Serial communication via Bluetooth ® version 2.1
Support for version 2.1 + Enhanced Data Rate (EDR)
Backward compliant with Bluetooth version 2.0, 1.2, 1.1
< 100 meters (Line of sight)
ELCON AB
Scope
Supplier
Order number
Export restrictions
Nyhammar Sweden
Revision 1
This product is subject to export control when exported
from the European Union.
Valid countries outside the E.U. is
Australia, Japan, Canada, New Zeeland, Norway,
Switzerland, Liechtenstein and USA.
2015-04-30
Go to INDEX.
D.C.M Dynamic Contact Measurement User manual
page 17(18)
9.2 DCM 2 TECHNICAL SPECIFICATION
Control input
Quantity
Marked
Connector type
Standard
Manufacturer
Charge voltage
Max charge current:
Communication
Trig signal:
1
“CONNECT TO CONTROL UNIT”
M12, 8 pole Male
IEC 61076-2-101
Phoenix contact
18-24VDC
2.5A
RS485, baud rate 921.6 K Baud
5-24VDC
Current output
Quantity
Marked
Connector type
Output
Current pulse time:
Current limitation:
2 + 1 Return
“+ CURRENT 1”, “+ CURRENT 2”, “- CURRENT 1, 2”
High current sockets with locking, nom 100A
type: ID/B6AR-N-S (Manufacturer: Multi Contact)
0-1.6VDC, 0-225A (Depends of cable resistance)
max 200ms
By cable resistance.
Voltage Sense Input
Quantity
Marked
Connector type
Measurement range 1
Analog resolution 1
Measurement range 2
Analog resolution 2
2 + 2 Reference
“+ SENSE 1”,“+ SENSE 2”,“- SENSE 1”,“- SENSE 2”
Isolated banana socket
± 0.15VDC
14 bits Resolution about 0,0000185 V DC / Bit
± 1.5VDC
14 bits Resolution about 0,000185 V DC / Bit
Measuring resistance
Range1
Measurement range 1
Measurement range 2
Sample rate
≤ 750 µΩ ± 1 µΩ @ 200A
≤ 1.5 mΩ ± 10 µΩ @ 200A
≤ 5.0 mΩ ± 10 µΩ @ < 200A
50KHz
Environment
Dimensions
Weight
Operating temperature
Storing temperature
Relative humidity
Altitude operating
Altitude non-operating
165*50*175 (With*Height*Depth)
about 1.6 kg
-20 - 40 °C
-20 - 70 °C
20 - 85% non-condensing
< 2 000 m
< 12 000 m
9.2.1 DCM 2 ACCESSORIES INCLUDED
Connection cable DCM-2
Quantity
Description
Standard
Manufacturer
Part number
Length
Supplier
Order number
2
Multi cable 8 pole M12 plug in connector
IEC 61076-2-101
Phoenix contact
SAC 8P-M12MS/10- PUR/M12FS SH
10 meters
ELCON AB
Connection cable, breaker T element Quantity
Description
measurement.
Length
Supplier
Order number
2
special designed cable for current and voltage drop
Connection cable, breaker base
1
special designed current and reference for voltage drop
Nyhammar Sweden
Quantity
Description
measurement.
Length
Supplier
Order number
Revision 1
3 meters
ELCON AB
0.3 meters
ELCON AB
2015-04-30
Go to INDEX.
D.C.M Dynamic Contact Measurement User manual
page 18(18)
9.3 DECLARATION OF CONFORMITY
10. REVISIONS
Revision 0
Revision 1
Date 2015-04-28
Date 2015-04-30
Nyhammar Sweden
Revision 1
2015-04-30
Go to INDEX.