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US 2018/0328991 A1Published application
Accumulator operated relay test device 1
AssigneeOmicron Electronics GmbH
InventorUlrich KLAPPER
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AssigneeOmicron Electronics GmbH
InventorUlrich KLAPPER
Estimating the term…
A method and test device for testing protection relays, the test device having a signal generator. The signal generator supplies a signal as pulses having pause times, which alternate over time. Signal level is reduced during the pause times and at least one pulse has an amplitude at least higher than one of the preceding pulses. A supply voltage is supplied by an accumulator providing electric energy for generating the pulses. Via the accumulator, a greater mobility and flexibility is ensured, and fuel-fed power units or emergency power units may be omitted. In order to reduce the load (average energy) on the accumulator, the signal generator emits the signal as pulses having pause times. The pulse amplitudes may have an increasing trend to reach a switching threshold. This allows the use of smaller and more compact, which is important for a portable test device.
A method for testing a protection relay (2), wherein a signal (S) is generated in a test device (4), and the signal (S) is applied to the protection relay (2), characterized in that a signal generator (G) provided in the test device (4) outputs the signal (S) as pulses (P) having pause times (τ1, τ2, τ3, τ4, τ5), wherein the pulses (P) of the signal (S) and the pause times (τ1, τ2, τ3, τ4, τ5) alternate over time (t), the level of the signal (S) is reduced during the pause times (τ1, τ2, τ3, τ4, τ5) and at least one pulse (P) has an amplitude which is higher than at least one of the preceding pulses (P), and that the test device (4) is supplied with a supply voltage (UV) by an accumulator (5), which thus provides electric energy for generating the pulses (P).
A test device for testing a protection relay (2), which has a signal output (SA), through which a signal (S) is output, characterized in that the test device (4) comprises a signal generator (G), which is configured for outputting the signal (S) in the form of pulses (P) having pause times (τ1, τ2, τ3, τ4, τ5), wherein the pulses (P) of signal (S) and the pause times (τ1, τ2, τ3, τ4, τ5) alternate over time (t), the level of signal (S) is reduced during the pause times (τ1, τ2, τ3, τ4, τ5) and at least one pulse (P) has an amplitude which is at least higher than one of the preceding pulses (P) and that an accumulator (5) is provided, which provides a power voltage (UV) for the test device (4).
Dependencies are inferred from the claim text.