Dairyland
Isolator/Surge Protector (ISP)
SKU: ISP
High Powering Decoupler
The Isolator/Surge Protector (ISP) is the original solid-state AC conducting/DC blocking device designed for the corrosion prevention industry and features the most flexible and wide range of product ratings and applications available to the market. The ISP provides the widest range of features and ratings, including the highest levels of AC fault-handling capability – up to the highest typical transmission system faults making it the preferred product for power utility underground cable decoupling/bonding requirements.
Key Benefits
- High Reliability and Long Life: Proprietary solid-state design maximizes the benefits of solid-state components while eliminating their trade-offs.
- No Spark or Arc Concerns: Solid-state switching design eliminates spark or arc concerns.
- Inherent Fail-Safe Design: Designed to fail short, providing an effective grounding path.
- DC Isolation and AC Continuity: Blocks DC current while providing a low-resistance path for steady-state AC current, helping reduce AC corrosion effects and prevent hazardous voltage accumulation.
- Logic-Controlled Reset: Eliminates false triggering due to a wide variety of electrical disturbances and difficulty resetting from active operation to DC blocking and AC continuity.
Specifications
- Lightning Impulse Current Rating: 75 kA standard or 100 kA optional, maximum crest current during an 8 × 20 μs waveform.
- Trigger Voltage: 20 V standard. The ISP may become active between 15 V and 30 V or more when tested in an isolated condition.
- Fault Current Ratings: 35 kA, 68 kA or 118 kA at 1 cycle (60 Hz).
- Multi-Cycle Fault Current Ratings: 35 kA model: 28 kA at 3 cycles, 21 kA at 10 cycles and 14 kA at 30 cycles; 68 kA model: 55 kA at 3 cycles, 40 kA at 10 cycles and 30 kA at 30 cycles; 118 kA model: 96 kA at 3 cycles, 75 kA at 10 cycles and 54 kA at 30 cycles.
- Steady-State AC Current Rating: 90 A for 35 kA and 68 kA models; 120 A for 118 kA models.
- DC Reset Current: 40 A standard or 100 A optional.
- Enclosure Material: 14-gauge #304L stainless steel, powder-coat painted ANSI 61 light gray.
- Submersible Enclosure Rating: NEMA 6P / IP67 equivalent; indicator light and test point are not available.
- Non-Submersible Enclosure Rating: NEMA 4X / IP66 equivalent; includes a red indicator light and test point.
- Enclosure Dimensions (35 kA / 68 kA Models): 32.40" H × 28.42" W × 9.4" D.
- Enclosure Dimensions (118 kA Model): 36.46" H × 33.40" W × 11.94" D.
- Model Configuration: ISP-L-V-FC-AC-S-RC. Available configurations vary by lightning impulse rating, trigger voltage, fault current rating, steady-state AC current, enclosure type and DC reset current.
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Shipping & Returns
Shipping costs and delivery timelines vary by order. All returns require prior written approval and may be subject to a restocking fee.
Please review our Terms & Conditions for complete shipping, return, and warranty details.
