Alpha-Delta Transi-trap User guide

IAANSI-IAAP'

PRO

with

Arc-Plug™

ALPHA

SURGE

I EelORS

the

field-replaceable

Cartridge

DELtA

CDlMWNICA~

(All)

Transi-Trap
designed
from

damage
generated
static

The

elements
two metal
rugged
voltage-dependent
repeatedly
In

operation, a sufficient
causes
its

impedance
few milliohms
While

conducting

surge
The

life
surge
is

subjected.
unpredictable
Life

may

on

surge

After a sufficient
discharged
is a gradual
resist2nce.
indicated
tune-up,
strong
Arc-Plug
protect

Surge

to

protect

due

by

build-up).

in

electrodes

gas

filled,

carry

an

arc

in

arrester

of

the

current

Transients

be

many

current

through

lowering

Therefore,

by

an

or

by a "dead"

near-miss

Cartridge.

the

equipment

transient

the

to

from

less

is

Arc-Plug

amplitude

in

increase

Protectors

sensitive

to

excess

phenomena

Arc-Plug'"

hermetically

ceramic

switches

large

currents

form

between

greater

than

in

the

arc

less

than

Cartridge
and

magnitude

hundreds

wave

shape.

number

the

Arc-Plug

of

breakdown

Arc-Plug

lightning

In

this

until

electronic

voltages

cylinder.

which

voltage

than

100

nanoseconds

mode,

30

volts.

duration

are

by

and

of

of

lightning

in

VSWR

receiver

discharge

case,

cleared.

are

gas

surge

or

currents

(lightning

Cartridge

sealed

They

can

reliably

for

brief

across

the

electrodes,

10,000

the

voltage

is a function

to

their

very

energy

operations,

pulses

Cartridge,

voltage

Cartridge

during
caused

shorting

the

short

arresters

equipment

or

consist

in

a
perform

and

periods

the

element

megohms

level.

changing

time.

across

which

nature

depending

have

there
and
replacement

transmitter
by

an

the

continues

of

as

of

time.

to

a

the

of

the

the

deVice

beel1

insulation

extremely

is

to

r't'

't'

't'

't' 't'

't' 't'

't' 't' 't'

't' 't'

't' 't' 't'

1.

INSTALLATION:

Note:

Any
line
higr
outdoor
thoroughly
ground

2.

Ground

The
Protectors
arc

energy

through

Test

The
Protectors
standing
special
lightning-type
observed
with
receivers
communications
devices
certain
currently
to

be

transistors
By

connecting
output
the

induced

It

should
when
merely

model

where

the

R.

F.

voltages

use

all

wire)

system:

unique

results:

level

semiconductors

isolated

permits

from

the

of

is

state-of-the-art

wave

the

and

most

PIN

diodes,

used

even

more

in

of

the

pulse

be

much

lower-level

"leaky".

must

VSWR

is

coax

protection

front

sensitive

noted

from

planned,

surfaces

with a good

ground

direct

being

shields.

remarkable,

generator,

pulses

performance

wave

commonly

transceivers.

industry

including

in

the

sensitive

typical

this

type
front

will "blow"

that

't' V 't' 't' 't'

be

does

coupled

provided

of

to

ind

use.

many

surges

't'''

IMPORTANT-Read

placed

triggering

it

(after

earth

not
is

necessary

sealer

system

Lab

at a point

exceed

the

attaching

{protector.

of

connection

to

the

tests

show

OPERATIONAL AND TEST INFORMATION

by
and
performance.

up

to

of

TranSi-Trap

Our

has

shown

lightning-induced

ustry.

than

of

PIN

generator,

Transi-Trap

our

lab

simulating

10

kilovolts,

used

in

own

that

the

higher

These

many

diode

with

the

diode

PIN

diodes

cause

experience

MOSFETs

them

before installing!

INSTALLATION INFORMAtiON

best

for

in

2: 1

Transi-Trap

equipment

tests

solid

devices

directly

the

to

prevent
units.
to

coat

coax

and

while

this

show

By

using

fast

rise

we

Protectors

state

some

of

surges

voltage

to

no

protection,

into a dead

fail

in

to

become

coax

When

Surge
preventing
chassis

method

out­a

time

have

in

the
the

are

types

are

known

and

bipolar

the

short.

equipment

to

be

3bsolutely

to

the

cold

water

not

too
function
return

For

maximum
to

an

earth

This

is

high

induced
ground
these

suggestions

regardless

When

the

the

generator
coaxial
pulses
show

the

Nearby

Since

many
lightning-induced
near-misses,
protection
Surge

Lightning-induced
energy
front)
are

not

Also,

certain

of

these
memory
caused

overall

nut

long

without

path

important

to

Transi-Trap

configuration,

without

same

or

Protectors.

content,

characteristics.

guaranteed

devices.

devices

by

protection.

necessary

and

washers

pipe

connection

or

circuitous.)

this

for

the

protection,

ground

since a closer

voltage

the

chassis

of

the

type

anj

failure.

remarkable

distant

equipment

the

operator

with

the

time

semiconductors

For

are

the

simple

...

't' 't' 't' 't'

to

attach a direct

on

connection

arc

energy.

at

the

on

the

of

follow

good

of

Protector

the

PIN
the

Other

lightning

failures

surges

use

of

surges

duration,

For

to

protect

example,

so

sensitive

touch

't' 't' 't' 't' 't'

For

the

the

Arc-Plug

is

suitable

The

surge
as

ground

the

protector

from

the

point

of

near-miss

shield.

station

engineering

is

diode,

diodes

survive

receiver-type

results.

surges:

occur

distant

will

find a new

Alpha

Delta

(transients)

and

that

reason,

against

are

beyond

some

that

of a finger

't'

't' 't' 't' 't'

system

earth

Cartridge.

if

its

protectors

there

is

antenna

entry

to

can

Also,

attach

equipment.

in

inserted

in a typical

practice,

use.

repeated

as a result

storm

dimension

Transi-Trap

have

ramp

speed

these

direct

the

exotic

MOS

the

discharge

will

destroy

't'

't' 't' 't' 't' 't'

to

work,

path

will

other

shield

building.

cause

an
Both

ohm

of

and

of

(wave

IC

them.

it

wire

(A

a

earth

ground

ground

no

coax

the

between

SO

components

fronts

unpredictable

protectors

strokes.

protection

...

is

is

not

of

Arc-Plug'"

Attach

here.
bottom

To

remove
unscrew
completely
assembly
chassis.

(Do

cartridge,

plastic

until

is

free

Car~ridge.

ground

nut.)

not

wire

loosen

\

body

entIre

from

Since

it

makes

an

solderless,

internal,

pressure-fit
connection, a replacement
Arc-Plug
installed
into

hole.
thread
Tighten

"feel"

the

Do

same

or

only

the

Cartridge

by

screwing

threaded

not

cross-

over-tighten.

until

connection.

is

it

you

INSTALLATION INFORMATION

MODELS

Transi·Trap

Low
transceivers or transmitters running up to
ohms.

Model L T to

AVAILABLE:

Models

(with UHF connectors)

R·T & LT

Level Protector- for use with solid state receivers,

200 watts output at

30 MHz, Model R-T to 500 MHz.

50

R-T,

Either
used

connector

for

input

or

can

output.

be

Arc-Plug

(Low

Level

fire

at

lightning

the

Models

lowest

pulse
level, p rovidin
maximum
protection.
receivers

For

and
transceivers

g

Cartridge.
A

ttach
wire
not
nut
touching

bOdY.)~

ground

here.
loosen
that

(Do

the

is

the

LT

NOTICE FOR INSTALLATION WiTH

REPEATER I DUPLEXERS:

If

the Trans-Trap Protector is placed
duplexer, it
protector
attachment

may

be necessary

or

run the ground-lead through a ferrite bead

to

the protector. The value and size of ferrite is not critical.

to

in

the output (antenna) side of a

vary the length

of

the ground-lead to the

at

the point

of

This procedure will help prevent any stray coupled RF in the ground-lead
from re-entering the open reciever as "noise".

NEW

"EMP

SERIES"
Models R-T and L T "EMP Series· Arc Plug™ cartridges are designed to
protect against nuclear Electrmagnetic
surge voltages. The
previous designs for
The

"EMP Series· design is based on the National Communications

EMP pulse clamping level

maximum safety.

Pulse (EMP) as well as lightning

is

3 times lower than the

Systems Technical Information Bulletin 85-10 covering EMP protection
for radio communications equipment.
All Transi-TrapTM protectors feature "isolated ground" to keep damaging
ARC energy from the chassis.

FOR FURTHER INFORMATION on NCS TIB 85-10 contact:

Office of the Manager

National Communications

System

ATTN: NCS-TS

Washington, D.C. 20305-2010

CAUTION:

for

Replace

Alpha

the
will

untcnnd,or

correct

Della

huzards

not

Each

pulse

or)/Y

prevent

other

Transi-Trilp

of

Arc-Plug

brcc1kdmvn

with

prope.

fDc'

or

structure.

Protection

durnu<jc

hghjning-induccd

Cd

and

Arc-Plug

Ct:w;(:d

.\' '

::)

bL"C'fl

Alphil

,He

TjH'~-;l'

by

d

'i:,!;ct

~;('lt:C;lli

r)(lt,!

dt.:SlY;~'.:(:

d<:'."/jcc:'"

rf

\

hdr<lC!f.'rlstlc~;

from

Sy;;lt:ms

surIJC!;,

..

:

::c:cf'!H'd

[:-.!

'r~,'rl

r;;,

Cr

S!T'C,,',C

del.

·;'''.·\J)lCd~l':r·.

!I,

I'

',:\)'"

r,f·':,t.".'l.t,

In

l:l

Transi·Trap Model

High Voltage Protector-for use with amplifiers running up

output at

Model

50 ohms.

HV

to

The Models R-T

0.1

dB at 500 MHz.) models for use with through VHF/UHF.

Replacement

500 MHz

&

H\I

Arc-Plug

HV

to

Protector Series are special low loss (typ.

Cartridges

2kW

For Models R-T & L T and for Model HV

Nc.ce:

Model R-T is also available with

"N"

type connectors, as

Model R-T/N.

for

Special

excellent

rnechanica:

vibration

shock

protection.

absJrber

shock

and

warranty

Seller warrants that each unit sold
with seller's specifications, drawings,

reC''3ipt

the date of

of the order, as they apply to those parts called
for on the order, and that each unit is f"',e from defects in material
and workmanship.

Sellers liability under this warranty
replacement

0:

any unit which proves to
workmanship under normal use
returned to the Alpha Delta shipping point (or authorized distributor If
purchased through this source) within six months from date
ment, and will in no case be responsible for
damages including
units from

This

our

wl.rran\y is in lieu

,:(,.'

but

not

by way of limi!ation, cost

reinstallation in eqUipment.

of

all other warranties expressed or implied.

is

manufactured

samples

I'>

limited to the repair or

be

and

defective in material

service provided the unit Is

special

or

in

data

or

consequential

or

accordance

in

effect on

of

ship-

removal of

or