CBCTTM CIRCUIT BREAKER COIL TESTER USER’S MANUAL Vanguard Instruments Company, Inc. 1520 S. Hellman Ave.
CBCT 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 CBCT, or cause errors in the test results. Vanguard Instruments Company, Inc. assumes no liability for unsafe or improper use of the CBCT.
REV 1 CBCT 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 .........................................................
CBCT USER’S MANUAL REV 1 CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions: • A key, switch, or knob on the CBCT is indicated as [KEY], [SWITCH], and [KNOB].
REV 1 CBCT USER’S MANUAL 1.0 INTRODUCTION 1.1 General Description and Features The Vanguard Circuit Breaker Coil Tester (CBCT) is a variable voltage DC power supply designed specifically to test substation circuit-breaker Open and Close coils. The CBCT uses the substation’s DC power supply to electronically generate a programmable output voltage from 5% to 95% of the source voltage.
CBCT USER’S MANUAL 1.2 REV 1 Technical Specifications Table 1. CBCT Technical Specifications TYPE Programmable DC Power Supply PHYSICAL SPECIFICATIONS 19”W x 7”H x 15”D, (48 cm x 17 cm x 38 cm); Weight: 25 lbs (11.
REV 1 1.3 CBCT USER’S MANUAL CBCT Controls and Indicators The CBCT’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 CBCT.
CBCT USER’S MANUAL REV 1 Table 2. Functional Descriptions of CBCT Controls and Indicators Item Number Panel Markings Pulse output voltage. Constant output has to be on first. Press PULSE switch to output voltage. Output voltage is turned on for 1 second. LED indicator is lit when output is on. 1 2 Functional Description OUTPUT ENABLE Use this key to turn on the constant output voltage. Constant output voltage. Use [OUTPUT ENABLE] key to turn on or off. Output is enabled when LED is lit.
REV 1 CBCT USER’S MANUAL 2.0 OPERATING PROCEDURES 2.1 CBCT Cable Connections Typical CBCT DC control connection diagrams are shown below. Figure 2 illustrates the CBCT “Constant Output” connection to the circuit breaker control circuit. Figure 3 and Figure 4 illustrate the CBCT “Pulse Output” connection to the circuit breaker Trip and Close coil. Always connect the CBCT ground stud to the sub-station ground. WARNING Figure 2.
CBCT USER’S MANUAL REV 1 Figure 3. Direct Connection from CBCT Pulse Output to CB Trip Coil Figure 4.
REV 1 2.2 CBCT USER’S MANUAL Setting the Output Voltage Follow the steps below to set the output voltage: a. Turn on the unit and start from the “MAIN MENU”: MAIN MENU Press the [CONTROL KNOB] to start the test. b. The following screen will be displayed: INPUT VTG: 124.0 OUTPUT VTG: 0.0 TIME: 0.0mS Status: *READY* The input DC voltage is displayed as ‘INPUT VTG: xxx.0’. In the above example, the input voltage is 124.0. The output voltage is 0.0 since it is not enabled.
CBCT USER’S MANUAL 2.3 REV 1 CBCT Timer Start Input Timer Start Input mode can be selected only when the “Main Menu” is being displayed. Select the Timer Start input mode by pressing the [Arrow] key. The LED will be lit next to the label for the currently selected mode. The CBCT timer can be started in three selectable modes: internal, wet input, and dry input. Each mode is described below: • Internal Mode In this mode, the timer will start when the [PULSE] switch is pressed.
REV 1 2.4 CBCT USER’S MANUAL CBCT Timer Stop Input Timer Start Input mode can be selected only when the “Main Menu” is being displayed. Select the Timer Stop Input mode by pressing the [ARROW] key. The LED will be lit next to the label for the currently selected mode. The CBCT timer can be stopped in two selectable modes described below: • Dry Contact Mode In this mode, the timer will look for a change in the Stop Input terminals to stop the timer.
1520 S. Hellman Ave • Ontario, CA 91761 • USA Phone: 909-923-9390 • Fax: 909-923-9391 www.vanguard-instruments.com Copyright © 2009 by Vanguard Instruments Company, Inc. CBCT User’s Manual • Revision 1.
