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The ISP is the original solid-state AC conducting / DC blocking
device designed for the corrosion prevention industry.
Of our products, the ISP has the most flexible and wide range
of ratings and applications available. It provides the highest
levels of AC fault-handling capability - up to the highest
typical transmission system faults.
The ISP was designed with fail-safe construction as a fundamental
requirement.
With features and characteristics
determined by user input and our engineering design, the ISP
has set the standard for performance.
Indeed, it has become the industry standard device for high
fault current applications such as those found at electrical
utilities.
Typical
Applications
- Lead
Sheath or Pipe-type Cable Casings - AC Grounding and DC
Isolation
- Protection
of Insulated Joints
- AC
Voltage Mitigation on Pipeline Systems
- Bonding
Lead Sheath to Copper Concentric Neutral Systems
Features
& Characteristics
- Solid-state
Design - Replaces Polarization Cell Technology
- No
Maintenance Needed
- Fail-safe
Design
- Self-protection
Features Built-in
- Comprehensive
Testing Available with Optional In-Situ Tester (IST)
- Simple
Field Testing Procedures with Standard Equipment
- No
Energy/Power Requirements
- Unlimited
Number of Operations
- Submersible
Enclosure Design
Ratings
- 60Hz
Ratings
DC Voltage Blocking: 10 or 17V
Lightning Surge Current: 50,000A or 75,000A crest
(8 x 20 μs waveform)
Steady-state AC Current (Amperes - rms): 30, 60,
90A
AC Fault Current (Amperes - rms):
|
Catalog
Code
|
1
cycle
|
3
cycle
|
10
cycle
|
30
cycle
|
|
7
|
7,000
|
5,300
|
4,200
|
3,700
|
|
24
|
24,000
|
18,000
|
14,000
|
11,000
|
|
35
|
35,000
|
28,000
|
21,000
|
14,000
|
|
68
|
68,000
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55,000
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40,000
|
30,000
|
Options
- Tamper-proof Cover Screws
- Test Point - For Use with Optional In-Situ Tester (IST)
- Isolated Enclosure - Case Must be Grounded Separately
- Indicator Light - Flashes when ISP is Triggered On
- 50Hz
Ratings
DC Voltage Blocking:
10 or 17V
Lightning Surge Current: 50,000A or 75,000A crest
(8 x 20 μs waveform)
Steady-state AC Current (Amperes - rms): 25, 50,
75A
AC Fault Current (Amperes - rms):
|
Catalog
Code
|
1
cycle
|
3
cycle
|
10
cycle
|
30
cycle
|
|
2.7
|
6,700
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5,000
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4,000
|
3,600
|
|
23
|
23,000
|
17,000
|
13,000
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10,000
|
|
33
|
33,000
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27,000
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20,000
|
13,000
|
|
65
|
65,000
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52,000
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38,000
|
28,000
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Options
- Tamper-proof Cover Screws
- Test Point - For Use with Optional In-Situ Tester (IST)
- Isolated Enclosure - Case Must be Grounded Separately
- Indicator Light - Flashes when ISP is Triggered On
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