1) Typical test pulse: rise time 10 ns, time to half value 1500 ns, charge voltage min. 50 kV, source impedance 90

Ω

General

The EMP protection unit is sequenced, i.e. to use simultaneously the benefits of inert-gas-filled

surge arresters (extremely high surge capability) and of varistors (fast response). They are isola-

ted by a series inductor.

The arrester is housed in a plug-in socket, so it can be removed and tested without detaching the

lines.

Note on voltage figures:

The maximum voltage on the filter output depends primarily on the rise time until the arrester re-

sponds. For this reason the maximum voltage on the filter output is stated in the following table as

a function of the rising edge dv/dt of the pulse.

Technical data

Rated voltage

10

V

Rated frequency

0 ... 2

Rated current

100

mA

Referred to +40

°C ambient

temperature

Number of lines

10

Pairs

Line impedance

124

Ω

Maximum DC resistance

<2.2

Ω

Per line

25/+40

°C

Climatic category

(EN 60068-1)

25/085/56

25

°C/+85 °C/56 days damp

heat test

Approx. weight

300

g

Nominal DC spark-over voltage

<800

V

Nominal surge current

5

kA

Line/line

(8/20

µs)

10

kA

Pair/case

Suppression condition

Maximum voltage on filter output:

At rising edge

Unsymmetrical

Symmetrical

dv/dt = 0.1 kV/

µs

≤60 V

≤8 V

dv/dt = 1 kV/

µs

≤90 V

≤15 V

≤70 V

≤40 V

EMP protection units

B84320Z0010H034

PCM data lines to 2 MBit/s

2