3B Scientific High Voltage Coil with Horn Electrodes User Manual

3B SCIENTIFIC

®

PHYSICS

High Voltage Coil Including 2 Horn Shaped Electrodes U8497460

Operating manual

10/07 TL/ALF

1 Air vents
2 Housing
3 Adjustment lever
4 Electrodes

1. Safety instructions

Safe operation of the equipment is guaranteed,
provided it is used correctly. However, there is no
guarantee of safety if the equipment is used in an
improper or careless manner.

• If there is any indication that safe operation

may not be possible (e.g. visible damage), the
equipment should be turned off at once or
should not be turned on in the first place.

• The device is not suitable for experiments by

students.

• Always use safety cables for experiments.

• The experiment configuration may only be

altered when the power is turned off.

• Do not turn on the mains coil until the

experiment set-up is complete.

• The maximum operating time is 1 minute in

each case.

• Do not touch the housing, the air vents or the

electrodes while the device is operating.

• Do not cover air vents.

• Do not open the case.

• Do not allow the equipment to come into

contact with liquids.

1

2. Description

3. Scope of delivery

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

1 High voltage coil
2 2 Horn shaped electrodes

4. Technical data

Number of turns: 24000
Open-circuit voltage: 9200 V approx.

Resistance: 10 kΩ
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

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