| 摘要 |
2119775 9308671 PCTABS00021 In an electric fence energising apparatus, in which a chargeable discharge capacitor is connected over the primary winding of a transformer, to the secondary winding of which the fence is connected to receive pulses at the discharge of the capacitor, the discharge time of the capacitor serves as a measure of the voltage of the corresponding output pulse on the fence. The primary winding of the transformer (T1) is divided into two oppositely connected windings (P1, P2), the discharge capacitor (C3) being arranged to be discharged through a first one (P2) of the primary windings. A voltage determined by the discharge of the capacitor is produced over the second of the primary windings (P1) during the discharge process. A measuring unit (6) measures the time of the duration of this voltage over the second primary winding (P1), determined by the discharge of the capacitor.
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