Vanguard CT-6500 Manuel d'utilisateur télécharger pdf (Page 11)

CT-6500 Operating Instructions

NOTE

The CT-6500 can detect insertion resistors ranging from 10 to 7,000 Ohms.

Resistances over 7,000 Ohms are detected as an open contact.

3.2 Mechanical Measurement Results

Under the Time Travel Mode the digital, transducer channel provides the following test results:

Breaker stroke

Over travel

Bounce back

Contact wipe

Contact velocity

Breaker contact speed calculations are based upon a contact's travel distance over a period

of time, which is defined by the manufacturer's specifications.

3.3 Analog Voltage Input Results

The analog voltage, input channel, “V1” measures the breaker's DC control voltage during an

operation. Printed voltage readings include nominal voltage, when the supply voltage has no load;

and minimum voltage, when the supply voltage is under load or when a coil is energized.

The “V1” connection allows the user to monitor the DC power supply’s voltage fluctuations during

a breaker operation. The feature is effective in detecting the breaker’s power supply problem,

which normally can not be seen by using a voltmeter.

NOTE

Voltage readings can range from 1 to 255 Vdc.

3.4 Digital Voltage Input Results

The digital voltage, input channel, “V2” monitors the voltage status as “ON” or “OFF” conditions

and graphs the result. A voltage level above 30 Vdc is considered as the “ON” state. The input

channel is dedicated to monitor the breaker’s auxiliary switch action during a breaker operation.

NOTE

Input voltage ranges from 1 to 300 Vac/dc.

3.5 Initiate Current Results

The CT-6500 not only plots the trip or close current waveforms, but also prints the steady-state

current readings of the trip and close coils during an operation. A typical circuit breaker timing

report is shown on Figure 10.0.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 68 69

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Vanguard CT-6500 Manuel d'utilisateur Page 11