The OCS 500N6F series from AMETEK CTS GmbH is a Ring Wave Generator with Open Circuit Voltage 0.25 to 6 kV, Oscillation Frequency 100 kHz to 30 MHz, Short Circuit Current 9 to 500 A, Supply Voltage 250 to 440 VAC, 250 VDC. More details for OCS 500N6F series can be seen below.