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Technical Document Reader
Document
098-024
Name

AT3600 User Manual

Description
The full user manual for the AT3600 transformer tester.
AT3600 User Manual
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Expand 1 Introduction1 Introduction
Expand 2 Getting Started2 Getting Started
Expand 3 Test Program Editor3 Test Program Editor
Expand 4 Using the Server4 Using the Server
Expand 5 Fixtures5 Fixtures
Expand 6 Front Panel Operation6 Front Panel Operation
Collapse 7 Tests and Test Conditions7 Tests and Test Conditions
Collapse 7.1 Transformer Tests7.1 Transformer Tests
7.1.1 Application Of Tests
7.1.2 Continuity
7.1.3 Winding Resistance
7.1.4 Equivalent Resistance
7.1.5 Inductance
7.1.6 Inductance With Bias Current
7.1.7 Quality Factor
7.1.8 Dissipation Factor
7.1.9 Leakage Inductance
7.1.10 Inter-Winding Capacitance
7.1.11 Turns Ratio
7.1.12 Turns Ratio By Inductance
7.1.13 Impedance - Impedance With Bias
7.1.14 Dc Resistance Match
7.1.15 Inductance Match
7.1.16 Capacitance Match
7.1.17 General Longitudinal Balance
7.1.18 Longitudinal Balance
7.1.19 Insertion Loss
7.1.20 Frequency Response
7.1.21 Return Loss
7.1.22 Impedance Phase Angle
7.1.23 Inter-Winding Phase
7.1.24 Trimming Adjustment
7.1.25 Output To User Port
7.1.26 Insulation Resistance
7.1.27 Hi Pot (DC)
7.1.28 Hi Pot (AC)
7.1.29 Surge Stress Test
7.1.30 Wattage
7.1.31 Wattage (External Source)
7.1.32 Stress Wattage
7.1.33 Stress Wattage (External Source)
7.1.34 Magnetizing Current
7.1.35 Magnetizing Current (External Source)
7.1.36 Open Circuit Voltage
7.1.37 Open Circuit Voltage (External Source)
7.1.38 Low Voltage Open Circuit
7.1.39 Leakage Current
7.1.40 Inductance With Ext Bias (Series Circuit)
7.1.41 Inductance With Ext Bias (Parallel Circuit)
7.1.42 Impedance With External Bias
7.1.43 Hi Pot Ramp (AC)
7.1.44 Hi Pot Ramp (DC)
7.1.45 Voltage Break Down (AC)
7.1.46 Voltage Break Down (DC)
Expand 8 Specification8 Specification
Expand 9 Warranty and Service9 Warranty and Service
Expand 10 Safety Systems10 Safety Systems

7.1.45 ACVB - AC Voltage Break Down

WHERE USED

This test may be used to check the action of devices such as metal oxide varistors (MOV) that are used to protect transformer windings from transient over-voltages that may be present on the ac supply system.

A varistor is a non-linear semiconductor device that has little effect on the circuit until a particular break-down, voltage is reached. When that voltage is reached, the MOV conducts current and limits the applied voltage to its rated break-down voltage. A MOV is limited by the energy (Joules) that it can dissipate under break-down conditions to transient over-voltages only.

It is typically performed between all primary windings connected together, and all secondary windings plus the screen connected together.

SPECIFYING THE MEASUREMENT

During the test, an ac voltage is ramped up across the protection device (MOV) under test and the current is monitored. When the desired current flows, the test stops and the measured result is the break-down voltage. If the voltage is within the desired limits, the test is a PASS. If the voltage is outside the desired limits, or if no breakdown is detected when the maximum voltage is reached, the test is a FAIL. The voltage will ramp to the specified maximum plus 50V.

In programming the AT3600 you may select the voltage (from 100V to 5kVrms), the frequency (50Hz / 60Hz at the full voltage, or up to 1kHz at reduced voltage), the current trip level (10μA to 5mApeak), and the ramp up times (1 to 30sec), all to suit the specification of the transformer under test.

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