Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany •
www.elwedidactic.com
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
www.3bscientific.com
Subject to technical amendments
© Copyright 2007 3B Scientific GmbH
2. Description
Secondary coil for transformer core D, generating
high voltages which can cause spark discharges
between two shielded horn electrodes.
Coils are made of impact-resistant plastic, safe to
touch. Number of turns, maximum current for
long-term operation, effective resistance and
inductance are specified on the case of the coil.
Ionisation leads to the formation of a gas discharge
arc between the V-shaped pair of horn electrodes
the consequential rise in air temperature causes
the arc to drift upward. The arc is eventually
broken but then forms again where the gap is
smallest. While the arc is burning, the voltage
drops to a minimum value. Consequently, further
ignition is only possible after the arc has
extinguished again.
The electrode spacing can be finely adjusted to the
optimal value by means of an adjustment lever.
2.1 Accessories
Transformer Core D
U8497180
Mains coil with connecting lead
U8497420-115
or
Mains coil with connecting lead
U8497420-230
3. Scope of delivery
1 High voltage coil
2 2 Horn shaped electrodes
4. Technical data
Number of turns:
24000
Open-circuit voltage:
9200 V approx.
Resistance: 10
k
Ω
Max. current:
0.02 A
Inductance: 28
H
Maximum operating time:
1 minute
Minimum cooling phase:
5 minutes
Dimensions:
90 x 70 x 350 mm
3
Weight:
550 g approx.
Fig.1 Experimental set-up