Vanguard Instruments VBT-75P User manual

VBT-75P
VACUUM BOTTLE TESTER
USER’S MANUAL
Vanguard Instruments Company, Inc.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TEL: [phone]
FAX: [phone]
March 2015
Revision 1

VBT-75P USER’S MANUAL REV 1
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SAFETY SUMMARY
FOLLOW EXACT OPERATING PROCEDURES
Any deviation from the procedures described in this operator’s manual may create one or more safety hazards,
damage the VBT-75P, or cause errors in the test results; Vanguard Instruments Co., Inc. assumes no liability for
unsafe or improper use of the VBT-75P. The following safety precautions must be observed during all phases of
test set up, test hookups, testing, and test-lead disconnects.
SAFETY WARNINGS AND CAUTIONS
This device shall be used only by trained operators. All circuit breakers under test shall be off line and fully
isolated.
SERVICE AND REPAIR
• Do not install substitute parts or perform any unauthorized modification to any VBT-75P test unit.
• Repairs must 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.
EQUIPMENT RATINGS
IP Rating: The enclosure for the VBT-75P has an IP rating of 32.
Pollution Degree: The VBT-75P has a pollution rating of 2.
Operating Voltage: The VBT-75P is rated for use with an operating voltage of 120V or 240V, auto-ranging ±10% of
selected voltage.
Power Cord: The VBT-75P is supplied with a 16 AWG, 16A power cord with a NEMA 5-15P plug. Replacement cable
shall have the same or better rating and is available through the manufacturer.
VENTILATION REQUIREMENTS
The VBT-75P must be operated with the enclosure lid open.
SAFETY SYMBOLS
Indicates that caution should be exercised
OR
Indicates location of chassis ground terminal
CLEANING
To clean the VBT-75P:
• Disconnect all cables and turn the unit off.
• Use a soft, lint-free cloth to wipe all surfaces clean.
• Avoid getting moisture in openings and connectors.
• Don't use any cleaning products or compressed air.

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TABLE OF CONTENTS
CONVENTIONS USED IN THIS DOCUMENT ....................................................................... 1
1.0 INTRODUCTION.................................................................................................................... 2
1.1 General Description and Features ................................................................................... 2
1.2 Printer Paper.................................................................................................................... 3
1.3 Technical Specifications ................................................................................................... 4
1.4 VBT-75P Controls and Indicators ..................................................................................... 5
2.0 CABLE CONNECTIONS .......................................................................................................... 7
3.0 OPERATING PROCEDURES ................................................................................................... 8
3.1 Setting the Date and Time ............................................................................................... 8
3.2 Adjusting LCD Screen Contrast ........................................................................................ 8
3.3 Entering Test Record Header Information....................................................................... 9
3.4 Performing a Test........................................................................................................... 11
3.5 Printing a Directory of Test Records Stored in the VBT-75P's Memory ........................ 15
3.6 Reviewing a Test Record ................................................................................................ 17
3.7 Restoring a Test Record ................................................................................................. 19
3.8 Deleting Test Records .................................................................................................... 21
LIST OF TABLES
Table 1. VBT-75P Technical Specifications...................................................................................... 4
Table 2. Functional Descriptions of VBT-75P Controls and Indicators ........................................... 6
LIST OF FIGURES
Figure 1. VBT-75P Controls and Indicators ..................................................................................... 5
Figure 2. VBT-75P Connection Diagram.......................................................................................... 7
Figure 3. Sample Test Results Printout ......................................................................................... 14
Figure 4. Sample Test Record Directory Printout ......................................................................... 16

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CONVENTIONS USED IN THIS DOCUMENT
This document uses the following conventions:
• A key or switch on the VBT-75P is indicated as [KEY] and [SWITCH] .
•
Screen and menu names are referenced as “SCREEN/MENU NAME”.
• VBT-75P LCD screen output is shown as:
• Warning messages are indicated as:
WARNING
Warning message
• Important notes are indicated as:
NOTE
Note details
DISPLAY TEXT LINE 1
DISPLAY TEXT LINE 2
DISPLAY TEXT LINE 3
DISPLAY TEXT LINE 4

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1.0 INTRODUCTION
1.1 General Description and Features
The VBT-75P is a microprocessor-based, portable 75 kV dc vacuum bottle tester. This
lightweight, portable tester is designed for testing circuit-breaker vacuum bottles in the field
and at the shop.
Test voltages can be selected from 10 kV dc to 75 Kv dc in 1 Kv steps. The high voltage test time
can be set from 5 seconds to 2 minutes. The test voltage is raised to the selected voltage and
held for the test time duration. After the test time duration has elapsed and the leakage current
did not pass the pre-set value of 100 µA, 200 µA, or 300 µA, the test voltage is returned to zero
and a "Pass" message is displayed. If a flash-over condition occurs, such as bottle failure, the
test voltage is immediately turned off, a “Failure” message is displayed on the LCD screen, and
the “TEST FAIL” LED light on the unit is also illuminated.
The presence of high voltage is indicated by an audible tone and an illuminated “HIGH
VOLTAGE” LED light. For additional operator safety, an “ARM” switch must be held down during
testing.
The VBT-75P features a back-lit LCD screen (20 characters by 4 lines) that is viewable in both
bright sunlight and low-light levels. A rugged, 16-key, membrane keypad is used to control the
unit. Test results can be printed on the built-in 2.5" wide thermal printer.
The VBT-75P can store up to 84 records of 16 readings in Flash EEPROM. Test records can be
retrieved and printed on the built-in thermal printer, or they can be transferred to a PC via the
unit’s RS-232C interface. Windows®-based software is provided with each unit. Using this
software, test records can be retrieved from the VBT-75P and then stored on the PC for future
analysis and report generation. Additionally, test records can be exported in PDF, Excel, and
XML formats.
The VBT-75P is furnished with a 10-foot test cable that is terminated with a quick-disconnect
test clip. A transportation case is also included.

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1.2 Printer Paper
The VBT-75P's built-in thermal printer uses 2.5-inch wide thermal paper for printing test results.
To maintain the highest print quality and to avoid paper jams, the use of thermal paper
supplied by Vanguard Instruments Company is highly recommended. Additional paper can be
ordered from the following sources:
Vanguard Instruments Co, Inc.
1520 S. Hellman Avenue
Ontario, CA 91761
Tel: [phone]
Fax: [phone]
Part Number: VIC TP-3 paper
BG Instrument Co.
13607 E. Trent Avenue
Spokane, WA 99216
Tel: [phone]
Fax: [phone]
Part Number: VIC TP-3 paper

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1.3 Technical Specifications
Table 1. VBT-75P Technical Specifications
TYPE Portable 75 kV vacuum bottle tester
PHYSICAL SPECIFICATIONS Dimensions: 17”W x 10.5”H x 6.5” D (42.7 cm x 26.9 cm x 16.5 cm)
Weight: 12 lbs. (5.44 Kg)
INPUT POWER 2 amps, 90-240 Vac, 50/60 Hz
OUTPUT VOLTAGE 10 kV to 75 kV dc in 1 kV steps; accuracy: 1.5%
OUTPUT RIPPLE VOLTAGE 3% max
DISCHARGE TIME Maximum discharge time for internal high voltage is 3 seconds
DISPLAY back-lit LCD (20 characters x 4 lines); viewable in bright sunlight and low-light
levels
KEYPAD rugged membrane keypad (10 alpha-numeric keys, 6 function keys)
COMPUTER INTERFACE one RS-232C port
INTERNAL DATA STORAGE stores up to 84 records of 16 readings each
PC SOFTWARE Windows-based software is included with purchase price
PRINTER Built-in 2.5" wide thermal printer
ENVIRONMENT Operating: -10˚ to 50˚ C (15˚ to +122˚ F);
Storage: -30˚ C to 70˚ C (-22˚ to +158˚ F)
HUMIDITY (MAX) 90% RH @ 40˚ C (104˚ F) non-condensing
ALTITUDE (MAX) 2000m (6562 ft) to fully safety specifications
CABLES one 10-foot high-voltage cable, one 10-foot high voltage return cable, one
ground cable, one power cord
FURNISHED ACCESSORIES Shipping case is included
WARRANTY One year on parts and labor
NOTE
The above specifications are valid at nominal operating voltage and at a
temperature of 25°C (77°F). Specifications may change without prior notice.

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1.4 VBT-75P Controls and Indicators
The VBT-75P’s controls and indicators are shown in Figure 1 below. A leader line with an index
number points to each control and indicator, which is cross-referenced to a functional
description in Table 2. The table describes the function of each item on the control panel. The
purpose of the controls and indicators may seem obvious, but users should become familiar
with them before using the VBT-75P. 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. VBT-75P Controls and Indicators

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Table 2. Functional Descriptions of VBT-75P Controls and Indicators
Item
Number Panel Markings Functional Description
1 HIGH VOLTAGE High voltage cable connector
2 Built-in 2.5" wide thermal printer
3 RS-232C RS-232C port
4 Input power connector with built-in fuse holder and power switch
5 TEST FAIL Test failure indicator. This indicator turns on if the test current exceeds the
present current threshold (100, 200, or 300 μA).
6 Back-lit LCD screen (20 characters x 4 lines)
7 PUSH TO
"ARM"
Arm switch; press and hold during testing.
8 HIGH VOLTAGE
ENABLE
This indicator turns on when high test voltage is present at the test leads.
9 Rugged membrane keypad
10 GROUND High voltage return cable connector
11 GROUND VBT ground stud. Connect ground stud to substation ground using the provided
cable.

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2.0 CABLE CONNECTIONS
The VBT-75P comes furnished with one 10-foot (3.05m) high voltage cable and one 10-foot
voltage return cable. Both cables are terminated with alligator clamps that are used to connect
to the vacuum bottle being tested. A typical cable connection is shown in Figure 2 below.
WARNING
• To protect the VBT-75P against static discharge in the substation, always connect
the unit's ground stud to the substation ground.
• The circuit breaker must be off-line and completely isolated.
• The vacuum bottle under test should be in the OPEN position.
Figure 2. VBT-75P Connection Diagram