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    • 6. 发明公开
    • BATTERIEBETRIEBENES RELAISTESTGERÄT 1
    • EP3374778A1
    • 2018-09-19
    • EP16785451.2
    • 2016-10-21
    • Omicron electronics GmbH
    • KLAPPER, Ulrich
    • G01R31/327
    • G01R31/3278G01R31/3648G01R31/385H01H71/121
    • In order to increase the efficiency and handling of a test device for testing protective relays, a method and a test device (4) having a signal generator (G) are described, wherein the signal generator (G) outputs a signal (S) as pulses (P) with pause times (τ1, τ2, τ3, τ4, τ5). In this case, 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 in the pause times (τ1, τ2, τ3, τ4, τ5), and at least one pulse (P) has a higher amplitude than at least one of the preceding pulses (P). The test device (4) is supplied with a supply voltage (Uv) by a rechargeable battery (5) which therefore provides electrical energy for generating the pulses (P). As a result of the use of a rechargeable battery (5), greater mobility and flexibility are ensured and it is possible to dispense with power units or emergency power units which are supplied with fuel. In order to keep a load on the rechargeable battery (5), that is to say the average energy required, low, the signal generator (G) outputs the signal (S) as pulses (P) with pause times, wherein the amplitudes of the pulses (P) may be monotonously rising and in any case must have a rising tendency overall in order to reach a switching threshold (Ss). Despite the voltages and current magnitudes required for the test, this allows the use of smaller, more compact rechargeable batteries (5), which is important for a portable test device (4), for example.