3B Scientific Assembly Kit User Manual

3B SCIENTIFIC

®

PHYSICS

Assembly Kit “Bell, Relay and Bimetallic Switch” U8497700

Instruction Sheet

06/08 SP/ALF

1 Base plate
2 U-core
3 Fixing screw for U-core
4 Coil
5 Bell
6 Contact rods
7 Bimetallic strip

Armature

8

9 Leaf spring
10 Contact pin

1. Description

The bell, relay and bimetallic switch assembly kit is
used to construct different types of electromagnetic
switches and bimetallic strip switches.

2. Equipment supplied

1 Base-plate with three fixing positions
1 Bell, 70 mm diameter
2 Contact rods, each with three 4 mm holes
1 Leaf spring with plug
1 Bimetallic strip with plug
1 Armature with plug
1 Contact pin with plug

1 U-core, 20 × 20 mm²
1 Fixing screw for U-core
1 Coil, 800 turns.

3. Technical data

Base plate dimensions: 200×140×40 mm3 approx.
Weight: 1.6 kg approx.

4. Example switch assemblies

To assemble the switches the following additional
equipment is needed:

1 Transformer with rectifier (230 V, 50/60 Hz)
U33300-230
or
1 Transformer with rectifier (115 V, 50/60 Hz)
U33300-115

1 Lamp socket E14 U8495320

1 Filament lamp, 12 V, 25 W, E14, as typical consu­mer item

1

4.1 Assembly of a bell circuit

Fig 1 Assembly of a bell circuit

4.2 Assembly of a relay

Fig. 2 Circuit diagram for a bell

Fig 3 Assembly of a relay

4.3 Assembly of a bimetallic switch circuit

Fig. 5 Assembly of a bimetallic switch circuit

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 2008 3B Scientific GmbH

Fig. 4 Circuit diagram for a relay

Fig. 6 Circuit diagram for a bimetallic switch