The P993 single-finger test plug is provided for the verification of CT circuits.
It has been designed solely for use with the CT cassette of the P991 test
block.
For maximum safety, the P993 converts the monitored current into a voltage
which can be measured using a high impedance voltmeter.
The isolation between contact-fingers and 4mm output sockets is 5kV rms.
Two switch selectable current ranges are available:
• 0 to 2A (I) - scale 1V = 1A
• 2A to 20A (II) - scale 1V = 10A.
The insertion of the P993 will not cause the CT circuit to be open circuited.
> Accuracy
• Setting range 0A to 2A : 1mA rms to 2A rms,
±5% of reading.
• Setting range 2A to 20A : 2A rms to 20A rms,
±5% of reading
> Burden
• Less than 10mΏ on both setting ranges
> Current withstands
• 20A continuous (UL 5A nominal)
150A for 10s
500A for 1s
