AC Current Transformer - Bergoz Instrumentation - #1

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Precise waveform measurement of long pulses and macropulses up to several milliseconds with minimal droop and noise. Two versions are available: High-resolution (-HR) !1ìArms wideband noise Wideband (-WB) up to 1 MHz Three packaging types for the sensor: • In-flange UHV installation in the beam line • In-air installation over the vacuum chamber Cable from sensor to electronics up to 100m long Shielded twisted pair with BNO (Twin BNC) connectors ±10mA up to ±2A full scale current range Output ±1V or ±10V depending on version Dynamic range >104 Bandwidth 3 Hz up to 1 MHz Output signal droop < 2 %/ms • In-air installation with optional magnetic shield for high-resolution measurement in noisy environment ACCT sensor with optional magnetic shield Operating principle The ACCT is an evolution of the active transformer first proposed by Hereward in 1960. Compared to the Hereward transformer, the ACCT presents much lower noise, a DC offset of the output reduced to a very small value and excellent long-term stability. The sensor is built with a single winding, which requires only one wire pair between sensor and electronics; this allows much better EMI rejection when long cables are used. The electronics circuit is multistage, implementing the best low-noise operational amplifier available for this application. v 4.0 BNO connector ACCT AC Current Transformer