Figure 1-38. Typical Operating Curve for Two Series of Gas-Filled Spark Gap Arresters with Nonlinear Series Resistor

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Table 1-12. Typical Maximum Clamp Voltage for Spark Gap Arresters

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Grounding, Bonding, and Shielding for Electronic Equipments and Facilities

Table 1-14. High Energy ZNR Surge Arrester Typical Characteristics

MIL-HDBK-419A

Figure 1-38. Typical Operating Curve for Two Series of Gas-Filled Spark Gap

Arresters with Nonlinear Series Resistor

(3) Summary. In summary, the gas-filled spark gap is capable of discharging high-amplitude

transients, but has a relatively slow response time and a relatively high discharge voltage. Follow current

(10 to 80 amperes typical) occurs, but normally presents no significant problems. Figure 1-38 depicts typical

operating curves for two series of gas-filled spark gap arresters with a series-connected silicon carbide resistor.

ZNR and MOV type arresters. The ZNR type arresters have several desirable characteristics. Other

types of MOV arresters are currently under development that have voltage-current characteristics similar to

the ZNR type. The ZNR type arresters have a relatively fast turn-on time (50 nanoseconds or less), low turn-on

voltage, relatively low clamping voltage, and various levels of current dissipation capability since the ZNR

types are available in different energy level packages. Table 1-13 lists related characteristics for ZNR

available in one type of energy level package, and Table 1-14 lists related characteristics for a high-energy

level package.

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