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applications.
•
Interface port - Provides interface to other SR-98’s or MEGGER Phase Shifters.
Allows SR-98 unit to be used with another SR-98 to test slope and harmonic
restraint characteristics on current differential relays. Allows SR-98 unit to be used
with a three-phase phase shifter to test complex three-phase relays. Saves time in
making test connections. Multi-purpose test system saves money.
•
Phase shift capability (0 to 359.9
°
) - The SR-98 provides phase shift between the
main ac current and auxiliary ac voltage outputs (for testing complex relays), or
between the 230 volt output terminal of the main ac current and the auxiliary ac
voltage outputs (for testing synchronizing and phase sequence relays).
•
Selectable output frequencies - The output frequency of the ac main current can be
set for 16.66, 25 Hz (for testing light rail transit relays), 50, 60 Hz (standard power
frequency), 100, 120, 150, 180, 250 and 300 Hz (for testing harmonic restraint on
transformer differential relays). Multi-purpose test system saves time and money.
•
Circuit breaker simulator – Normally closed and normally open contacts are provided
to simulate breaker operation for testing reclosing relays. Sequence of operation,
timing and lockout are easily tested.
•
Non-volatile RAM – Provides storage of special test set-up screens.
•
RS-232 and parallel printer ports – The RS-232 port provides for computer interface.
The parallel printer port allows user to easily print test results.
•
Universal input voltage – Models SR-98-1 and SR-98-2 can use virtually any
standard source in the world. The Model SR-98-3 is designed for 230 Volt operation
only.
APPLICATIONS
The combination of single-phase AC voltage, AC current, with a variety of fixed output
frequencies and phase shift capability, DC voltage, and DC current, provides powerful
testing capabilities. For example, the AC Current output can provide 16.66 or 25 Hz, for
testing transit system relays. In addition, the AC Current can also be programmed to
provide 2nd, 3rd and 5th harmonic currents, for testing harmonic restraint elements in
transformer differential relays.
Summary of Contents for SR-98
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