ISA CBA1000 User manual

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Istrumentazioni Sistemi Automatici S.r.l.
VIA BERGAMO 41 - 21020 TAINO (VA) - ITALY
OFFICES TEL. [phone] - FA +39.0331.957091
LAB: TEL. [phone] -
E-MAIL [email protected]
WEB www.isatest.com
DATE: 12/12/2005 DOC.MIE12166 REV.1
CBA1000
INTRODUCTORY GUIDE

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SHORT FOREWORD ............................................................................................................................................................4
1 INTRODUCTION ................................................................................................................................................................5
2 TEST SET EXPLANATION ...............................................................................................................................................7
2.1 T HE FRONT PANEL AND THE KEY COMPONENTS ................................................................................................................7
2.2 P USHBUTTONS , DISPLAY , KEYPAD , CONTROL KNOB ..........................................................................................................9
2.3 T HE CONTROL WINDOW ....................................................................................................................................................9
2.3.1 Set...........................................................................................................................................................................10
2.3.2 Res..........................................................................................................................................................................10
2.3.3 Micro-Ohmmeter ...................................................................................................................................................10
2.3.4 View........................................................................................................................................................................10
2.3.5 Menu ......................................................................................................................................................................11
2.3.5.1 Test diagram........................................................................................................................................................................11
2.3.5.2 Trigger options....................................................................................................................................................................12
2.3.5.3 Test options.........................................................................................................................................................................15
2.3.5.4 Recording options ...............................................................................................................................................................17
2.3.5.5 Breaker and auxiliary channel settings................................................................................................................................19
2.3.5.6 Analog channel / coils settings............................................................................................................................................19
2.3.5.7 Micro-Ohmmeter test ..........................................................................................................................................................22
2.3.5.8 Results.................................................................................................................................................................................24
2.3.5.9 Preferences..........................................................................................................................................................................26
2.3.5.10 Set-up options ...................................................................................................................................................................28
2.3.5.11 Tests header.......................................................................................................................................................................30
2.3.6 Magnifying lenses..................................................................................................................................................31
2.3.7 t1, t2, dt...................................................................................................................................................................31
2.3.8 Printer ....................................................................................................................................................................31
2.3.8 Left column............................................................................................................................................................31
2.4 CB CONNECTIONS ...........................................................................................................................................................31
2.4.1 Main CB contacts...................................................................................................................................................31
2.4.2 Coil drivers.............................................................................................................................................................32
2.4.3 Auxiliary CB contacts............................................................................................................................................33
2.4.4 Travel transducer or analog input.........................................................................................................................33
2.4.5 Micro-Ohmmeter. ..................................................................................................................................................33
2.5 P OWER - ON ......................................................................................................................................................................33
2.6 C ONNECTION TO THE PC.................................................................................................................................................34
3 THE HELL, IT DOESN’T WORK...................................................................................................................................35
3.1 I NTRODUCTION ...............................................................................................................................................................35
3.2 P HYSICAL DESCRIPTION ..................................................................................................................................................36
3.3 E RROR MESSAGES ...........................................................................................................................................................36
3.4 T ROUBLE SHOOTING .......................................................................................................................................................37
3.4.1 No power at power-on............................................................................................................................................37
3.4.2 The test set is locked up .........................................................................................................................................38
3.4.3 The control knob does not operate........................................................................................................................38
3.4.4 A coil driver doesn’t close......................................................................................................................................38
3.4.5 A breaker contact is not detected...........................................................................................................................39
3.4.6 An auxiliary contact is not detected ......................................................................................................................39
3.4.7 The travel transducer does not operate.................................................................................................................40
3.4.8 The micro-Ohmmeter does not operate.................................................................................................................40
3.4.9 Problems during upgrade......................................................................................................................................40
3.4.10 The fault cannot be fixed.....................................................................................................................................41
3.5 A DDING OPTIONS ............................................................................................................................................................43
3.6 C ALIBRATION ..................................................................................................................................................................43
3.6.1 Introduction ..........................................................................................................................................................43

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3.6.2 Calibration procedure...........................................................................................................................................44
APPENDIX 1: SPARE PARTS LIST ..................................................................................................................................46
APPENDIX 2: TEST SET SCHEMATIC ...........................................................................................................................47

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SHORT FOREWORD
Dear CBA1000 user,
I often wondered why the user’s manual is not very much used, even if it includes valuable information.
As me too I am a user of such manuals, the answer I have given myself is that valuable information are
concealed somewhere in the thick thing, and I do not have time to waste to find it. So, either the manual
is actually of help, or I ignore it.
This is why I decided to split the CBA1000 manual in three: specification, with all performance details;
introductory guide, with the device description; application manual, with instructions about how to use
it one its operation is understood. The idea is that you may read once the introductory guide or the
specification, while you need to follow application examples more than once; so, why not to split the
manual in three?
This manual is the introduction to the test set; it includes also a troubleshooting guide.
Have a good work with CBA1000!
Primo Lodi
Q&A Manager

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1 INTRODUCTION
The circuit breaker analyzer and micro-Ohmmeter model CBA1000 is a two-in-one test set.
When used as a circuit breaker analyzer, it allows the off-line testing of the characteristics of all modern
MV and HV circuit breakers.
When used as a micro-Ohmmeter, it allows measuring the contact resistance of the circuit breaker
contact, or also of joints or other circuit parts. It allows also to perform the dynamic test of the contact
resistance, that is to record and display how does the contact resistance change while it is closing: this
allows detecting hidden defects, that are otherwise impossible to be diagnosed.
The instrument performs the following features:
. Test set control: via keypad plus selection knob plus dedicated keys, and a large transflective LCD
display (320 x 240 pixels; view area 122 x 92 mm).
. Optional internal thermal printer 58 mm wide or external thermal printer 112 mm wide.
. Huge recording capability: 64Mb (typically 1000 results).
. USB and RS232 interface for data communication with the PC.
. Two driving coil circuits (O+C); 4 opt. The coil current is independently measured on all outputs, with
three current ranges.
. Three sets of two main contact sensing circuits (two chambers tests). Test of the main contact and of
the pre-insertion resistor.
. Four digital event input circuits.
. For the main and event inputs, measurement of delays with respect to coil currents or other references.
. The Open or Closed state of main and event inputs is displayed by a light: thanks to these lights, the
status of the circuit breaker is continuously monitored..
. One analog circuit input circuit, with a voltage source for potentiometer transducers polarization.
Measurement is translated into stroke, speed, acceleration. In alternative, the input can measure the
auxiliary DC voltage during circuit breaker operation.
. Static resistance measurement; test current 200 A, 80 A or 25A.
. Dynamic contact resistance test; test current 200 A.
. Many triggers can start the recording.
. In case of more than two chambers per phase, capability of generating or sensing a trigger, so that a
number of units can operate at the meantime.
. All possible test sequences are programmable, including test cycling.
. Test result is shown on the display: it is possible to analyse, zoom and so on.
. Capability of storing and recalling both test settings and test results.
. The software CBA1000.PRO (that operates with WINDOWS 2000 up) is included: it allows
analyzing test results, adding notes, saving and so on. It allows also to store and recall test set settings.
. The external option DET1000 allows to perform the test while the circuit breaker has both ends
connected to earth, thus maximizing the test safety; it allows also to test circuit breakers with a graphite
nozzle.

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All circuits have been designed to ensure safe operation in the noisy environment of HV and MV
substations.
The instrument is housed in a transportable aluminium box, that is provided with removable cover and
handles for ease of transportation.
NOTE: WINDOWS is a trademark of MICROSOFT inc.

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2 TEST SET EXPLANATION
2.1 T HE FRONT PANEL AND THE KEY COMPONENTS
The following is the front panel; all components on the front, and the key ones inside the test set, are
listed here below (see also the CBA1000 schematic at the end of the manual).
1) Supply socket and main supply fuse, rated T5A, incorporated in the supply socket.
2) Earth socket.
3) Power-on switch, with light.
4) Buzzer: it tells that the test is about to be started.
5) MENU control knob, with switch.
6) Display: before testing it allows to select the test parameters; after test start it displays test results.
7) Keypad, alpha-numeric, to input the test heading.
8) Serial interface connector.
9) USB interface connector.
10) Options: 40 columns thermal printer, or auxiliary supply loss test.
11) Auxiliary inputs sockets: two groups of two contacts, isolated.

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12) Auxiliary inputs: dry or wet selection lights.
13) Auxiliary inputs level: ON = closed or with voltage.
14) Main contacts input sockets: three phases with two chambers each.
15) Main inputs lights: GREEN = main input CLOSED; RED = main input OPEN or pre-insertion
resistor.
16) 5 V DC measurement input connector, for the micro-Ohmmeter circuit.
17) Measurement input sockets, for position transducers or other measurements.
18) Auxiliary 5 V 10 mA supply for the position transducer.
19) High current output sockets for the micro-Ohmmeter.
20) Auxiliary 5 V supply protection fuse, F 63 mA 500 V.
21) CLOSE coil command sockets: one side will be connected to the positive or to the negative of the
DC supply.
22) PARK sockets, unconnected, for the safe positioning of coil commands.
23) OPEN coil command sockets: one side will be connected to the positive or to the negative of the
DC supply. It drives phase 1 if the three phase open option is present.
24) Optional OPEN coil command sockets, for phases 2 and 3: one side will be connected to the
positive or to the negative of the DC supply.
25) Type of test selection pushbutton: as pressed, lights (26) move in a circular way. If unused, the
selection performed via knob (5) and display (6) is shown.
26) Selected test lights. O = Open; C = Close; OC = Open-Close; CO = Close-Open; OCO = Open –
Close – Open; USER = the programmed test sequence.
27) Test START push-button: as pressed, the selected test is started.
28) Test in progress lights: they are ON until the test is finished. When ON, no further START
command is accepted.
29) TRIGGER-IN and TRIGGER-OUT synchronization commands sockets. The Master CBA-1000
TRIG-OUT socket and zero sockets shall be connected to the Slave TRIG-IN and zero sockets.
30) Battery LED: it turns on during battery recharge.
60) Front panel board; code PWA11430.
61) Microprocessor board, code PWA51300.
62) INTE main and auxiliary contacts board, PWA11429.
63) Circuit breaker driver (2 channels) and measurements board, PWA11428.
64) Optional circuit breaker driver (2 channels) and measurements board, PWA11428.
65) Micro-Ohmmeter circuit board, with 14 driving circuits.
80) Rechargeable battery.
81) Auxiliary supply voltages module.
82) Capacitor of the micro-Ohmmeter circuit.

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2.2 P USHBUTTONS , DISPLAY , KEYPAD , CONTROL KNOB
The test set is controlled by two push-buttons: SELECT (25), with its LED’s (26) showing the current
selection , and START (27) with the light (28) , that starts the test.
Test selections are performed by the keypad (7), control knob (5) and display (6).
As With portable phones, pressing a button you access, in sequence, the letters, then the digit. Above
the zero is the space.
2.3 T HE CONTROL WINDOW
After power-on, the following window is displayed: it informs about firmware revision.

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After diagnostics, the following control window is displayed.
Selections to the right are short-cuts that allow to enter the corresponding selections. They can be
reached by means of the control knob (5), that incorporates a switch: this is possible selecting the item
moving the knob, and then pressing the knob to confirm. Once the item has been reached, moving the
knob the menu moves forwards backwards of one step, so that other programming can be performed;
else, selecting the arrow the menu returns to the main window.
2.3.1 Set
This selection is a short-cut to the “Setup options” selection of the Menu; see below.
2.3.2 Res
This selection is a short-cut to the “Results” selection of the Menu; see below.
2.3.3 Micro-Ohmmeter
This selection is a short-cut to the “Micro-Ohmmeter test” selection of the Menu; see below.
2.3.4 View
With this selection, it is possible to choose which channels will be displayed on the screen: this serves
to minimize the number of traces. Next to this selection, the display self-adjusts so that, so that it is
easier to watch test results. Pressing View, the following window is opened.