Solid State Decoupler (SSD)

• DC Isolation and AC Coupling: Functions as a DC isolation and AC coupling device (a “decoupler”), preventing the flow of CP current up to a predetermined voltage threshold while passing induced AC current.
• Automatic Over-Voltage Protection: Instantly switches to the shorted mode when voltage attempts to exceed the selected threshold. When the event has passed, the device automatically switches back to the DC blocking mode.
• Low Clamping Voltage: Provides a very low, safe clamping voltage across the SSD terminals.
• Solid-State Design: Uses proven solid-state components with an instantaneous response to voltage, initiating voltage clamping immediately when voltage attempts to exceed the selected blocking level.
• Fail-Safe and Maintenance-Free: If failure occurs due to AC fault current or lightning impulse current, the SSD fails in the shorted mode, providing an effective grounding (or conducting) path. The SSD is completely maintenance-free.

• DC Blocking Voltage Rating: Standard: -2 V/+2 V; optional: -3 V/+1 V. Additional blocking threshold options are available.
• Steady-State AC Current Rating: 45 A AC-RMS at 50/60 Hz.
• AC Fault Current Ratings (Amps AC-RMS Symmetrical, 50/60 Hz): 1 cycle: 2,100 A at 1.2 kA, 5,300 A at 2 kA, 6,500 A at 3.7 kA and 8,800 A at 5 kA; 3 cycles: 1,600 A, 4,500 A, 5,000 A and 6,800 A, respectively; 10 cycles: 1,400 A, 3,700 A, 4,200 A and 5,700 A, respectively; 30 cycles: 1,200 A, 2,000 A, 3,700 A and 5,000 A, respectively.
• Impulse Current Withstand Rating: Standard: 100 kA crest, 8 × 20 microseconds for 1.2 kA, 2 kA, 3.7 kA and 5 kA models; optional Class N: 50 kA crest, 10 × 350 microseconds for the 5 kA model.
• DC Leakage Current: Normally less than 10 mA at maximum blocking voltage at 20°C and less than 100 mA at 65°C. With normal cathodic protection voltage across the SSD, typically well under 1 mA.
• AC Fault Current Voltage Limitation: Less than 10 V AC under the maximum fault current ratings.
• Enclosure: Molded, non-metallic enclosure; IP68 rated to 2 m depth; suitable for indoor or outdoor use in submersible and non-submersible applications.
• Temperature Range: -45°C to +65°C (-49°F to +149°F).
• Terminals: Polarity-marked positive and negative terminals. The negative terminal connects to the more negative structure or structure with cathodic protection applied; the positive terminal connects to the grounded or more positive structure.
• Terminal Arrangement: Standard terminals are perpendicular to the mounting bracket (-R model numbers); optional terminals are parallel to the mounting bracket for installation with pin-brazed studs and the hex coupling nut.
• Mounting: Supplied with a mounting bracket for general use. Flange mounting kits are available separately.
• Energy Requirements: None. The device is totally passive.
• Number of Operations: Virtually unlimited under rated lightning or AC fault current conditions, provided operations are not immediately repetitive.
• Certifications: Class I, Division 2, Groups A, B, C and D; Zone 2, Group IIC. UL and C-UL for the Class and Division system; ATEX, IECEx and UKEx for the Zone system.
• Enclosure Rating: IP68 (enclosure only).

Product Data Sheet - ENG