Vanguard Instruments VBT-75 S2 Manuale utente

VBT-75 S2

VACUUM BOTTLE TESTER

USER’S MANUAL

Vanguard Instruments Company, Inc.

1520 S. Hellman Ave.

Ontario, California 91761, USA

TEL: (909) 923-9390

FAX: (909) 923-9391

July 7, 2017

Revision 1

VBT-75 S2 USER’S MANUAL REV 1

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-75 S2, or cause errors in the test results; Vanguard Instruments Co., Inc. assumes no liability for

unsafe or improper use of the VBT-75 S2. 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-75 S2 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-75 S2 has an IP rating of 32.

Pollution Degree: The VBT-75 S2 has a pollution rating of 2.

Operating Voltage: The VBT-75 S2 is rated for use with an operating voltage of 120V or 240V, auto-ranging ±10%

of selected voltage.

Power Cord: The VBT-75 S2 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-75 S2 must be operated with the enclosure lid open.

SAFETY SYMBOLS

Indicates that caution should be exercised

Indicates location of chassis ground terminal

CLEANING

To clean the VBT-75 S2:

• 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.

REV 1 VBT-75 S2 USER’S MANUAL

TABLE OF CONTENTS

CONVENTIONS USED IN THIS DOCUMENT ....................................................................... 1

1.0 INTRODUCTION .................................................................................................................... 2

1.1 General Description and Features ................................................................................... 2

1.2 Technical Specifications ................................................................................................... 3

1.3 VBT-75 S2 Controls and Indicators .................................................................................. 4

2.0 CABLE CONNECTIONS .......................................................................................................... 6

3.0 OPERATING PROCEDURES ................................................................................................... 7

3.1 Set the Date and Time ..................................................................................................... 7

3.2 Changing the LCD Screen Contrast .................................................................................. 8

3.3 Performing a Test ............................................................................................................. 9

3.4 Updating Firmware ........................................................................................................ 11

LIST OF TABLES

Table 1. VBT-75 S2 Technical Specifications ................................................................................... 3

Table 2. Functional Descriptions of VBT-75 S2 Controls and Indicators ........................................ 5

LIST OF FIGURES

Figure 1. VBT-75 S2 Controls and Indicators .................................................................................. 4

Figure 2. VBT-75 S2 Connection Diagram ....................................................................................... 6

REV 1

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VBT-75 S2 USER’S MANUAL REV 1

1.0 INTRODUCTION

1.1 General Description and Features

The VBT-75 S2 is Vanguard's second generation microprocessor-based, portable, 75kV 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 5 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. The test voltage and leakage current are displayed on the LCD

during testing. 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-75 S2 features a back-lit LCD screen (20 characters by 4 lines) that is viewable in both

bright sunlight and low-light levels. A turn-and-press knob is used to control the unit. The VBT-

75 S2's firmware can be updated in the field via the unit's built-in USB Flash drive port.

The VBT-75 S2 is furnished with a 10-foot test cable that is terminated with a quick-disconnect

test clip. A transportation case is also included.

REV 1

1.2

PHY

BT-75 S2

echnical

ICAL SPECI

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SER’S MAN

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Table

TYPE

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RGE TIME

DISPLAY

CONTROL

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UPDATE

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ITY (MAX)

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CABLES

ING CASE

ARRANTY

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erature of

UAL

1. VBT-75 S

ortable 75 kV

imensions: 1

eight: 10 lbs

0 – 240 Vac,

0kV – 75 kV

% max

aximum disc

ack-lit LCD (

iewable in bri

ingle turn-an

ailure Indica

00 μA, or 300

igh Voltage I

irmware can b

terface

perating: -10˚

torage: -30˚

0% RH @ 40˚

000m (6562 f

ne 10-foot (3.

eturn cable, o

hipping case

ne year on p

ications are

5°C (77°F).

Technical

vacuum bottle

7”W x 10.5”H

. (4.53 Kg)

A, 50/60 Hz

c in 5 kV step

arge time for i

0 characters x

ht sunlight an

-press knob

: LED illum

μA (program

ndicator: LE

updated in t

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VBT-75 S2 USER’S MANUAL REV 1

1.3 VBT-75 S2 Controls and Indicators

The VBT-75 S2’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-75 S2. 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-75 S2 Controls and Indicators

REV 1 VBT-75 S2 USER’S MANUAL

Table 2. Functional Descriptions of VBT-75 S2 Controls and Indicators

Item

Number Panel Markings Functional Description

1 HIGH VOLTAGE High voltage cable connector

2 USB MEM USB flash drive interface for firmware updates

3 Back-lit LCD screen (4 lines x 20 characters).

Viewable in bright sunlight and low-light levels.

120/240 Vac, 2A,

50-60 Hz

F3AL 250V

Input power connector with built-in fuse holder and power switch

5 GROUND VBT ground stud. Connect ground stud to substation ground using the provided

cable.

6 TEST FAILED Test failure indicator. This indicator turns on if the test current exceeds the

present current threshold (100, 200, or 300 μA).

7 PUSH TO

"ARM"

Arm switch; press and hold during testing.

8 CHANGE VBT turn-and-press control knob.

9 HIGH VOLTAGE

ENABLED

This indicator turns on when high test voltage is present at the test leads.

10 GROUND High voltage return cable connector

2.0

The VBT

voltage

to the va

WARNIN

ABLE C

75 S2 come

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cuum bottl

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conn

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tect the V

ct the unit'

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Fig

IONS

with one 10

are termin

d. A typical

T-75 S2 aga

ground st

r must be

e under tes

re 2. VBT-7

-foot (3.05

ated with a

cable conn

inst static d

d to the su

ff-line and

should be

S2 Connec

VBT-75

) high volt

ligator cla

ction is sh

scharge in t

station gro

ompletely i

n the OPEN

ion Diagra

S2 USER’S

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ps that are

wn in Figur

he substati

nd.

olated.

position.

ANUAL

one 10-fo

used to con

2 below.

n, always

EV 1

ect

REV 1 VBT-75 S2 USER’S MANUAL

3.0 OPERATING PROCEDURES

3.1 Set the Date and Time

Follow the steps below to set the date and time for the VBT-75 S2's internal clock:

a. Start from the "START-UP" menu:

Turn the [CONTROL KNOB] until the SETUP option is enclosed in brackets as shown

below:

Press the [CONTROL KNOB].

b. The following screen will be displayed:

The SetTime option should be enclosed in brackets. Press the [CONTROL KNOB].

c. The following screen will be displayed:

Turn the [CONTROL KNOB] to select the first digit of the month and then press the

[CONTROL KNOB]. The cursor will move over to the second digit of the month.

Continue this process to enter the date and time. When you press the [CONTROL

KNOB] for the last time to set the second digit of the current minute, the date and

time will be set and you will be returned to the "START-UP" menu.

ENTER

MM-DD-YY HH:MM:SS

[SetTime ] LANGUAGE

LCD CONT EXIT

CABLE VTG: 0V

RUN TEST 07/06/17

[ SETUP ] 11:03:05

CABLE VTG: 0V

[RUN TEST] 07/06/17

SETUP 11:03:05

CABLE VTG: 0V

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