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THEORY OF OPERATION
The MEGGER SR-98 relay test set is a portable, self-contained unit, which provides
continuously adjustable current and voltage outputs, with phase shifting capability and
harmonic output currents for testing a wide variety of protective relays.
The unit is housed in a rugged, compact suitcase-type thermoplastic enclosure with
convenient carry handles and removable cover.
The SR-98 unit incorporates a microprocessor-based digital metering display, which
displays AC and DC Amperes, AC and DC Volts, and Time in both Seconds and Cycles.
Depending on type of test selected, other values may be displayed, such as Ohms,
Watts, VARS, Phase Angle, Frequency or Power Factor.
The independent outputs enable the SR-98 to provide an ac current, voltage (both ac
and dc), or two ac voltages and a dc voltage, to meet numerous testing requirements in
a wide variety of test applications. The main AC current output has selectable output
ranges of 4 Amperes @ 0 - 230 Volts; 10 Amperes @ 0 - 90 Volts; 45 Amperes @ 0 -
20 Volts and 115 Amperes @ 0 - 8 Volts, at selectable frequencies. The AC and DC
voltage outputs are independent and switch selectable. The AC voltage has a range of
0 - 300 Volts @ 0.25 Amps. The DC voltage has a range of 0 – 250 V @ 0.4 Amps.
UNIT PANEL ILLUSTRATION
Summary of Contents for SR-98
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