C.P. Sentinel (Potential Control) Series Cathodic Protection Rectifier

• Maintain precise protection levels: Automatically adjusts DC output to maintain the selected structure-to-reference electrode potential, current or voltage set point.
• Improve potential measurement accuracy: IR-drop-free control minimizes IR-drop error by taking potential measurements when no rectifier current flows in the anode-to-structure circuit.
• Help prevent excessive cathodic protection: Loss-of-reference shutdown turns off DC output if the reference electrode or its connection fails, helping prevent coating damage from excessive protection levels.
• Support accurate interruption testing: Anti-spiking circuitry helps prevent DC output overshoot after an interruption cycle, supporting accurate structure-to-soil potential measurements.
• Adapt to application requirements: Offers air- or oil-cooled construction, flexible AC input and DC output ratings, and optional features such as operational status alarms and remote monitoring.

• Rectifier type: Cathodic protection rectifier with automatic potential, current and voltage control
• Cooling configurations: Air-cooled or oil-cooled
• Controller: Sentry controller; Tri-Sentry controller for three-phase applications
• Control modes: “ON” potential, “IR-Drop Free” potential, constant current and constant voltage
• Potential control accuracy: Within ±5 mV of the selected potential set point
• Current and voltage control accuracy: Within ±2% of the selected set point, according to the supplied product description
• Reference electrode input impedance: Greater than 20 MΩ
• Output adjustment: Near-infinite adjustment steps through automatic controller operation
• Manual adjustment: 25 transformer tap steps, with 5 coarse and 5 fine adjustments
• Loss-of-reference protection: Automatically shuts off DC output if the reference electrode input fails
• Anti-spiking circuitry: Helps prevent output overshoot following interruption cycles
• Metering: Three continuous-reading meters for DC output voltage, DC output current and structure-to-reference electrode potential
• Surge protection: High-energy AC input and DC output surge/lightning protection
• Electrical protection: Configuration-dependent circuit breakers, fusing and rectification components

Product Data Sheet - ENG