ASCO Model 157 (Edco SS64 & SS65) Surge Protective Device

The ASCO Model 157 Surge Protective Device is designed for the water and wastewater industry. These multi-stage hybrid suppressors address over-voltage transients with gas tube and silicon avalanche technology. In addition, sneak and fault currents are mitigated with PTC devices which consist of solid-state resettable fuses.

Features

  • Transient protection for low-voltage signal lines
  • Sneak/fault current protection
  • Resettable fusing—PTCs
  • Differential and common mode protection
  • Automatic recovery

Benefits

  • Encapsulated in stainless steel pipe nipples
  • Protection for one pair, (Two wires and shield on 3/4”)
  • 5 Year Warranty

Tech Specs

  • Response Time: < 1 Nanosecond
  • MaximumSignal Voltage: 28 VMax
  • DC Clamping Level (L-G): 36 V ±l0%
  • DC Clamping Level (L-L): 72 V ±l0%
Peak Surge Current:
  • 10 kA (8 x 20µs)
Maximum let-thru Voltage:
  • Line-to-Ground (10x700µs): 44 V@400 A
Maximum let-thru Voltage:
  • Line-to-Line (10x700µs): 90 V@400 A
  • Series Resistance (per conductor): 5 V (typical)
Capacitance:
  • (Zero Volts Bias):
    • (L-L) 600 pf typical
    • (L-G) 1200 pf typical
  • Number of Occurrences 400@500 Amps (10x1000µs)