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M
ODEL
CI-50
C
URRENT
I
NTERRUPTER
(2010 RELEASE)
Contents of the shipping package:
Instrument Kit Includes:
Model CI-50 Instrument in tan case
(4) AA Batteries (installed)
Cable, 6’ length with clamps
Instruction manual
Warranty Card
Inspection
of the instrument should be performed upon receipt. If damage has occurred in
shipment, file a claim with the carrier immediately. If it is necessary to contact your supplier
or Tinker & Rasor, be sure to include all information such as serial number, purchase order
number and invoice number.
Important Note Regarding Rectifier Spikes
Most rectifiers experience a voltage spike when opening and closing, due to a capacitance
effect in the system that can be quite large and very fast. Depending upon the magnitude and
duration of the spike, the solid state circuitry of the CI-50, and most other current interrupters
made today, can become significantly damaged. It is recommended that an oscilloscope be
connected to a rectifier and the rectifier be manually cycled to see what type of spike may be
present, prior to using an interrupter. This step is suggested for all rectifiers, but is a
recommendation if the DC output of the rectifier is 50% or more of the maximum current the
interrupter can handle. To better understand this issue, please see Technical Appendix A
(attached to this document).
General Information
The Model CI-50 Current Interrupter is designed to interrupt cathodic protection systems. The
instrument using solid state switching (no mercury relay) capable of interrupting up to 50 Amps
of current at up to 120 volts (6000 WATT). The Model CI-50 can be used to interrupt the
connection between:
Rectifier and Structure (DC)
Rectifier and Anode(s) (DC)
AC Source and Rectifier (120v, single phase)
CORROSION MITIGATION INSTRUMENTATION
2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: (830) 253-5621
