Arbiter Systems 931A, Operation Manual

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Appendix B
Optional Accessories
This appendix contains both technical specifications and operational
information for optional accessories available for use with the Model 931A
Power System Analyzer.
B.1 Precision Current Transformer
The Model 09311A, Precision Current Transformer,
is an optional accessory that extends the Model 931A
input current measurement range to 400 Amps RMS
while retaining an overall accuracy of 0.1% and 0
. 1
◦
.
Mounts in 931A transit case; includes mounting
bracket and hardware (P/N AS0036000).
B.1.1 Specifications
Range: 0 . 8 − 400 Arms
Burden: 14 mohms
Accuracy: Amplitude: 0 . 1% of reading
Phase: 0 . 1
◦
B.1.2 Input Connections
Connect a high-current source as follows:
1. Slip the transformer output spade lugs into one set of the Model
931A current input binding posts (A, B, or C), and tighten securely.
2. Connect the high-current source to the 5/16-18 bolts at the top of
the transformer, using a 1/2” wrench to fasten securely. Make sure
that the polarity matches the polarity indicated on the front panel
of the Model 931A.
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