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

Custom Search

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

Up
Grounding, Bonding, and Shielding for Electronic Equipments and Facilities

Table 1-15. Test Results for Parallel-Connected ZNR

MIL-HDBK-419A

Table 1-13. ZNR Type Devices (Molded Case Type) Typical Characteristics

Range of Available Devices

Parameter

32 mm Disc

25 mm Disc

20 mm Disc

200 to 910 Volts

DC Breakdown Voltage at

1 Milliampere

640 to 3800 Volts

525 to 2800 Volts

590 to 3200 Volts

Maximum Clamping Voltage

at Maximum Surge Current

10 to 20 kA

Maximum Surge Current

2.5 to 5 kA

5 to 10 kA

(8 x 20 Microsecond Waveform)

Depends on Surge Current and Waveform*

Life

*iMaximum surge current (8 x 20 microseconds) can be applied twice without incurring damage or over

stressing the devices.

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

Three 80 mm Discs in Parallel

Size:

Powerline Voltage:

250 V AC Maximum

DC Breakdown Voltage at

560 Volts

1 Milliampere:

Clamping Voltage

Maximum Clamping Voltage:

Current

(10 x 20 Microseconds)

1300 Volts

10 kA

1600 Volts

40 kA

2450 Volts

150 kA

l-70