Vanguard DigiTMR S2 PC User Manual

TM

DigiTMR S2 PC

DIGITAL CIRCUIT BREAKER ANALYZER

USER’S MANUAL

Vanguard Instruments Company, Inc.

1520 S. Hellman Ave.
Ontario, California 91761, USA

TEL: [phone]
FAX: [phone]

July 2012

Revision 1

DIGITMR S2 PC USER’S MANUAL REV 1

SAFETY SUMMARY

FOLLOW EXACT OPERATING PROCEDURES

Any deviation from the procedures described in this User’s Manual may create one or more
safety hazards, may damage the DigiTMR S2 PC, or cause errors in the test results. Vanguard
Instruments Company, Inc. assumes no liability for unsafe or improper use of the DigiTMR S2
PC.

All safety precautions provided in this manual must be observed during all phases of testing
including test preparation, test lead connection, actual testing, and test lead disconnection.

SAFETY WARNING AND CAUTIONS

The DigiTMR S2 PC shall be used only by trained operators. When using the DigiTMR S2 PC in
Time-versus-Travel mode, all circuit breakers under test shall be off-line and fully isolated.

DO NOT MODIFY TEST EQUIPMENT

To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or
perform any unauthorized modification to any DigiTMR S2 PC test unit. To ensure that all
designed safety features are maintained, it is highly recommended that repairs be performed
only by Vanguard Instruments Company factory personnel or by an authorized repair service
provider. Unauthorized modifications can cause safety hazards and will void the manufacturer’s
warranty.

WARNING

Do not remove test leads during a test. Failure to heed this warning can result in damage to the
equipment.

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TABLE OF CONTENTS

1.0 INTRODUCTION .................................................................................................................. .. 1

1.1 General Description and Features ................................................................................... 1

1.2 Operational Modes .......................................................................................................... 3

1.2.1. “On-Line” Mode ....................................................................................................... 3

1.2.2. Time-versus-Travel Circuit Breaker Analyzer Mode ................................................. 3

1.3 Technical Specifications ................................................................................................... 4

1.4 DigiTMR S2 PC Controls and Indicators ........................................................................... 5

2.0 OPERATING PROCEDURES ................................................................................................... 6

2.1 Configuring the VCBA S2 Software for use with the DigiTMR S2 PC ............................... 6

2.2 Connecting the DigiTMR S2 PC to a PC via Bluetooth ..................................................... 8

2.3 DigiTMR S2 PC Cable Connections ................................................................................. 16

2.3.1. Contact Cable Connections .................................................................................... 16

2.3.2. Initiate Cable Connections ..................................................................................... 17

2.3.3. Analog and Digital Voltage Monitor Connections .................................................. 19

2.3.5. AC Current Sensor Connection ............................................................................... 22

2.3.6. Transducer Connections ......................................................................................... 23

3.0 GLOSSARY OF TERMS ......................................................................................................... 26

4.0 Compatible Transducers and Transducer Adapters .......................................................... 27

LIST OF TABLES

Table 1. DigiTMR S2 PC Technical Specifications ............................................................................ 4

LIST OF FIGURES

Figure 1. DigiTMR S2 PC Controls and Indicators ........................................................................... 5

Figure 2. Contact Cable Connections ............................................................................................ 16

Figure 3. DC Trip and DC Close Initiate Circuit Cable Connections ............................................... 17

Figure 4. DC Trip and AC Close Initiate Circuit Cable Connections ............................................... 18

Figure 5. Analog and Digital Voltage Monitoring Cable Connections .......................................... 19

Figure 6. External Trigger Cable Connection for an Open Connection ......................................... 20

Figure 7. External Trigger on a Close Operation Less 52Y Delay Time ......................................... 21

Figure 8. Typical CT Connection .................................................................................................... 22

Figure 9. Typical Transducer Connection ...................................................................................... 23

Figure 10. Typical Resistor Type Transducer Connection ............................................................. 24

Figure 11. Vanguard Resistor Transducer Adapter Connected to an ABB AHMB Transducer ..... 24

Figure 12. Vanguard Doble Transducer Adapter Connected to a Doble Linear Transducer ........ 25

Figure 13. Vanguard Doble Transducer Adapter Connected to a Doble Rotary Transducer ....... 25

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DIGITMR S2 PC USER’S MANUAL REV 1

1.0 INTRODUCTION

1.1 General Description and Features

The Vanguard DIGITMR S2 PC is an inexpensive, easy to use digital circuit breaker analyzer that
is designed to be used with a PC. This inexpensive analyzer offers the most cost-effective
method for testing circuit breakers. It can fully analyze a circuit-breaker’s performance by
testing the contact time, stroke, velocity, over-travel, and contact wipe. Contact-motion
analysis can be performed for all breaker contact operations (Open, Close, Open – Close, Close
– Open, and Open – Close – Open). The DIGITMR S2 PC offers three dry-contact channels (for
timing circuit breaker main and insertion resistor contacts), one digital transducer channel (to
monitor CB contact motion), and two voltage monitoring channels.

“On-Line” Timing Mode Option

An optional “on-line” timing mode is available for the DIGITMR S2 PC. In this mode, the
DIGITMR S2 PC captures the breaker’s trip or close time, the trip/close coil current
“fingerprint,” and the battery supply voltage while the breaker is still in service. The trip/close
time is derived from the time of trip, or close coil initiation, to the breaker’s bushing current
breaker-make as detected by an AC clamp-on current sensing probe.

The “on-line” timing mode can detect a breaker’s operating conditions with little or no down
time. In this mode, the first trip operation time of the breaker is captured. If a breaker has been
in service for a long period of time and sitting in close position, the first trip time of the breaker
may be slow possibly due to a sticky mechanism. The “on-line” mode is very useful in such
cases because traditional breaker timing may not detect this condition since several operations
may have occurred before the first timing test is conducted.

Open/Close Coil Current Monitoring

A built-in Hall-Effect current sensor records the circuit breaker’s operating coil current
amplitude and duration. The circuit breaker’s operating-coil waveforms (effectively, a
performance “fingerprint” or “current profile”) can be used as a diagnostic tool for analyzing a
circuit breaker’s performance.

Contact Timing Inputs

Dry-contact input channels are used for timing circuit-breaker contacts. Each contact input
channel can detect main contact and insertion resistor contact times in milliseconds and cycles.
Three contact timing channels are available on the DIGITMR S2 PC.

Breaker Stroke and Velocity

One digital transducer input channel is available to measure circuit breaker contact stroke,
velocity, over-travel, and bounce-back. With the use of a Vanguard digital travel transducer, no
set-up calibration is required before testing. A special feature is also available to “Slow-Close”
test a circuit breaker and obtain test results. An optional Resistor Transducer Adapter Device
can be used to interface with any resistor transducer.

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CT Input

One non-contact AC current sensor is used to monitor circuit breaker on-line current for the

“on-line” timing mode.

Voltage Monitoring Input

One analog input channel, designated as (V1), is dedicated to monitoring the substation DC
supply or coil voltage (0-255 Volts, DC or peak AC). A second voltage input channel, designated
as V2, is dedicated to detecting voltage On/Off status (presence or absence). This input can be
used to monitor the status of an A/B switch.

Circuit Breaker Initiate Feature

A built-in solid-state initiate device is used to operate the circuit breaker from the DIGITMR S2
PC. Operational modes include Open, Close, Open-Close, Close-Open, and Open-Close-Open.
Multiple operations such as Open-Close, Close-Open, and Open-Close-Open can be initiated
using a programmable delay or by sensing the circuit breaker’s contact condition.

Computer Interface

One USB interface port and an optional Bluetooth interface is available for computer-control.
Vanguard's Windows®-based Circuit Breaker Analyzer Series 2 (VCBA S2) software is included
with each DIGITMR S2 PC. The software can be used to control the unit, review test records,
and create circuit breaker test plans. Test records can be exported to PDF, Excel, and XML
format. All future software updates can be downloaded from the Vanguard web site at no
additional charge.

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DIGITMR S2 PC USER’S MANUAL REV 1

1.2 Operational Modes

1.2.1. “On-Line” Mode

In “On-Line” mode, the trip/close time is derived from the time of trip, or close-coil initiation, to
the breaker’s bushing current-break-or-make as detected by an AC clamp-on current sensing
probe. The DigiTMR S2 PC can time a circuit breaker’s OPEN operation by sensing the time when
the OPEN coil is energized until the bushing CT current returns to zero. The breaker’s CLOSE time
is detected when the close coil is energized until the bushing CT current is detected. The “On-Line”
mode provides a quick way to diagnose a breaker’s performance and can reduce maintenance
costs.

1.2.2. Time-versus-Travel Circuit Breaker Analyzer Mode

In Time-versus-Travel mode, the DigiTMR S2 PC applies a test voltage of 35 Vdc to each of the
contact channels, thus allowing an analog to digital converter (A/D) to determine a close, open,
or an insertion resistor as the state of the contact. The DigiTMR S2 PC records into memory
20,000 readings (in on second) from the A/D’s and the transducer position counters. The
contact time, circuit breaker stroke and velocity are then derived from the stored data.

The DigiTMR S2 PC’s travel transducer employs optical encoders to send quadrature
signals to the unit’s counters. With the use of digital transducers and counters, the

NOTE

need to setup or calibrate the transducers is eliminated.

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1.3 Technical Specifications

Table 1. DigiTMR S2 PC Technical Specifications

TYPE Portable digital circuit breaker analyzer

PHYSICAL SPECIFICATIONS 18.5"W x 14"H x 7"D (47.0 cm x 35.7cm x 17.6 cm); Weight: 16 lbs (7.3 kg)

INPUT POWER 3 Amps, 100 – 240 Vac, 50/60 Hz

DRY-CONTACT INPUTS 3 dry-contact channels; each channel detects main contact and insertion resistor

TIMING WINDOWS 1 second, 10 seconds, or 20 seconds

TIMING RESOLUTIONS ±50 micro-seconds @ 1 sec. duration,

TIMING ACCURACY 0.05% of reading ±0.1 milliseconds @ 1 second duration

DRY-CONTACT DETECTION

RANGE

RESISTOR DETECTION RANGE 50 – 5,000 ohms

TRIGGER INPUT VOLTAGE Open/Close: 30 – 300 V, DC or peak AC

VOLTAGE SENSING INPUT RANGE V1: analog input; 0 – 255V, DC or peak AC; Sensitivity: ±1V

BREAKER OPERATIONS Initiate Open, Close, Open – Close, Close – Open, Open – Close – Open

BREAKER INITIATE CAPACITY 30A, 250 Vac/dc max

INITIATE CURRENT READING

RANGE

DIGITAL TRAVEL TRANSDUCER

INPUT

CONTACT TRAVEL POINT

DIFFERENCE

CT CURRENT SENSOR One, non-contact, 0-100A

COMPUTER INTERFACES One USB port, optional Bluetooth interface

PC SOFTWARE Windows®-based Circuit Breaker Analysis software (VCBA S2) included with

SAFETY Designed to meet UL/IEC 61010 and CAN/CSA C22.2 No. 1010.1-92 standards

ENVIRONMENT Operating: -10°C to 50° C (15°F to +122° F); Storage: -30° C to 70° C (-22°F to

HUMIDITY 90% RH @ 40°C (104°F) non-condensing
ALTITUDE 2,000 m (6,562 ft) to full safety specifications

CABLES Furnished with full set of test leads (including 20-foot contact leads and 30-foot

OPTIONS transportation case (available for the DIGITMR S2 and travel transducers)

WARRANTY One year on parts and labor

contact

±500 micro-seconds @ 10 sec. duration,
±1.0 milliseconds @ 20 sec. duration

Closed: less than 20 ohms; Open: greater than 5,000 Ohms

V2: voltage presence/absence detector input; 30 – 300V, DC or peak AC

One, non-contact, Hall-effect sensor, 0 – 20 amp range, dc to 5Khz

1 digital travel transducer channel; linear range: 0.0 – 60.0 in (±0.005 in)
rotary range: 0 – 360 degrees (±0.006 degrees)

Measures “slow-close” contact-point distances; results can be printed

purchase price. Software updates available at
no additional charge

+158° F)

contact lead extensions)

The above specifications are valid at nominal operating voltage and at a
temperature of 25°C (77°F). Specifications may change without prior notice.

NOTE

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DIGITMR S2 PC USER’S MANUAL REV 1

1.4 DigiTMR S2 PC Controls and Indicators

The DigiTMR S2 PC’s controls and indicators are shown in Figure 1 below. The purpose of the
controls and indicators may seem obvious, but users should become familiar with them before
using the DigiTMR S2 PC. Accidental misuse of the controls will usually cause no serious harm.
Users should also be familiar with the safety summary found on the front page of this User’s
Manual.

Figure 1. DigiTMR S2 PC Controls and Indicators

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2.0 OPERATING PROCEDURES

2.1 Configuring the VCBA S2 Software for use with the DigiTMR S2 PC

The DigiTMR S2 PC is operated using the Vanguard Circuit Breaker Analyzer Series 2 (VCBA S2)
PC software. Follow the steps below to properly connect the DigiTMR S2 PC and configure the
VCBA S2 application to recognize the unit.

a. Install the VCBA S2 software (please see the VCBA S2 software user’s manual for details)
b. Connect the DigiTMR S2 PC to the PC by connecting a USB cable from an open USB port

on the PC to the unit’s “USB PC” port.

c. Turn on the power on the DigiTMR S2 PC.
d. If this is the first time you are connecting the unit to the PC, Windows will recognize it as

a new device and automatically install necessary drivers. If using Windows XP, you may
be prompted to install drivers. Select the automatic installation option and Windows will
locate the generic drivers necessary.

e. Please note that although the unit is connected via USB, it uses an internal serial

interface to communicate with the PC. As such, it will appear in the windows Device
Manager as a USB Serial Port. Open the Device Manager from the Windows Control
Panel and note the COM port number. For example, in the installation shown below, the
DigiTMR S2 PC is shown as COM10 (USB Serial Port).

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DIGITMR S2 PC USER’S MANUAL REV 1

f. Launch the VCBA S2 application. From the “Sys-Config” menu, select “System Setup…”.

The following window will be displayed:

Make sure that the “Enable USB” option is UN-checked. Then, from the “Port” drop­down menu, select the COM port that corresponds to the port that the DigiTMR S2 PC is
connected to. Then click the OK button. The VCBA S2 software will now recognize the
DigiTMR S2 PC.

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