The Model SSS-HBD1 provides Line-to-Ground Lightning Protection on lower voltage power and signal line pairs with a Line-to-Line voltage limit as high as 80VDC
or 56VRMS (AC) [i.e. nominal 12VDC and 24VDC power feeders are just two applications]. This arrester can be used as Line-to-Ground protection on nearly
every line leaving / entering the Signal House with the exception of track-wires.
Components are mounted to a printed circuit board that is form and fit compatible with a standard lightning adapter
Dual High-Energy 20mm MOVs with High-Energy Gas Tube Arrester Protection
High-Energy Gas Tube provides air gap isolation
High-Energy MOVs eliminate any continuous follow through arcing of the Gas Arrester
All components are UL Listed
Robust and cost effective Line-to-Ground Protection solution for low voltage signal, power, and communication where lines must be isolated
from ground or where continuous arcing of the arrester is a concern
Very cost-effective
Features:
Mounts on standard AAR terminal blocks (not supplied) with 2-3/8" center-to-center post dimensions (standard for lightning arresters)
or any AAR terminal block strips that are positioned to accept a standard lightning arrester spacing
Incredibly High Residual Arc Voltage, 42 Volts minimum
Utilizes open slots at the ends of the circuit board for mounting flexibility and easy maintenance
All copper traces are on the underside of the board to prevent accidental shorting
Connection to the AAR Posts is on the underside of the circuit board
Used as Line-to-Ground protection on Line Pairs whose Line-to-Line Voltage does not exceed 80VDC or 56VRMS
Not for track-wire Line-to-Ground protection
Electrical & Temperature Specifications
Used as Line-to-Ground protection on Line Pairs whose Line-to-Line Voltage does not exceed 80VDC or 56VRMS
Maximum continuous applied DC voltage (across the device) = 40VDC
Maximum continuous applied AC voltage (across the device) = 28VRMS
DC Conduction Voltage @ 1mA (steady energy applied) = 148 to 200VDC
Peak Current Handling Capability = >3000A (8x20μS Waveform)
Energy Handling Capability = >240 Joules
Typical Capacitance = 1pF
Operating Temperature Range: -40 to +70°C
DC Breakdown Voltage (nominal) = 175 Volts
Typical firing voltage for a 1000V/μS transient ≈ 750 Volts Peak
Residual Arc Voltage (across the device) = 42 Volts minimum
Insulation Resistance = >1000 MΩ
Surge Life = 1000 minimum @ 500A (10x1000μS)
Dimensions:
Schematic:
Summary:
The Model SSS-HBD1 has the hybrid components mounted on a printed circuit board that is form and fit compatible with a standard lightning arrester mounting
(2-3/8" terminal spacing). This assembly uses a high current Gas Discharge Tube (GDT) wired in series with a parallel pair of high energy Metal Oxide
Varistors. The GDT provides a true isolation barrier between the protected circuit lines and earth ground. The High Energy Varistors are in the circuit to
extinguish any follow-through arcing that may occur when they are used to protect DC power, control lines, correspondence lines, signal lines, and any lines
carrying DC power inside or outside the Signal House or Case.
When applying these arresters, be sure the Line-to-Line (differential) voltage of the
wiring being protected does not exceed 80VDC or 56VRMS. One application would be for 24VDC power and any circuits using that power.
Note: These are not to be used as Line-to-Ground protection for wires connected directly to the rails.
