Electrical Protection Study And Coordination

Model No. DL PROT-EL

It allows studying the topics of electrical protective devices relevant to over currents used in civil and industrial applications and their co-ordination to ensure a good tripping sensitivity.
The laboratory provides all the accessories to study the characteristics of a three-pole fuse overcurrent protection, a three-pole thermo-magnetic breaker switch, a three-pole motor circuit breaker
and four-pole residual current breaker with physiologic threshold.

Theoretical topics:
1. CONDUCTOR PROTECTION
1.1. Overload
1.2. Short-circuit
1.3. Protection coordination
2. PROTECTIONS AGAINST THE CONTACTS
2.1. Indirect contact
2.2. Direct contact
2.3. Extracurrents
2.4. Electrocution
2.5. Protection measures
3. FUSES
3.1. Characteristic magnitudes
3.2. Normalization
3.3. Fuse Behaviour during the shortcircuit
3.4. Fuse choice
4. MAGNETOTHERMIC AUTOMATIC SWITCHES
4.1. Characteristic magnitudes
4.2. Behaviour of the switch during the shortcircuit
4.3. Switch choice
4.4. Selective protection
4.5. Switch upstream and fuse downstream
5. MOTOR PROTECTOR
5.1. Intervention curve
5.2. Behaviour of the switch during the shortcircuit
6. DIFFERENTIAL SWITCHES
6.1. Operation principle
6.2. Differential current
6.3. Coordination
6.4. Differential selectivity

Practical test
– Fuses purposes – Fusion time measure
– Magneto-thermic switch purposes – Measure of the thermal intervention time
– Motor protector purposes – Measure of the intervention time of the delayed thermal releaser
– Differential switch purposes – Measure of the differential intervention current and verification of the intervention of the differential switch
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