What are the types of testing methods for a LV panel?

Continuity Test, Polarity Test, 2.5 Kv Test, functional Test,

Insulation Test, Current Injection Test.

There is an IEC standard for LV panels, this is IEC 61439. Characteristics to be verified (tested) are as follows:

10.2 Strength of material and parts 

10.3 Degree of protection of enclosures 

10.4 Clearances and creepage distances 

10.5.2 Effective continuity between parts and PE 

10.5.3 Effectiveness of the ASSEMBLY for external faults 

10.6 Incorporating of apparatus 

10.7 Internal electrical circuits and connections 

10.8 Terminals for external conductors 

10.9.2 Power frequency withstand voltage 

10.9.3 Impulse withstand voltage 

10.10 Temperature rise limits 

10.11 Short-circuit withstand strength 

10.12 EMC 

10.13 Mechanical operation

This information is taken from ABB publication on new standard IEC 61439

Continuity test, contact resistance test, insulation resistance test, current injection test (trip test), torque test

Type-tested assemblies (TTA) and partially type-tested assemblies (PTTA)... it means you have to be able to identify which of those control units were Tested and Partially Tested. Commonly it requires continuity testing, resistance testing, insulation resistance check, and trip test... You have to use multi-meter, megger and ducter depends on the units.

1.Visual and functional test of components in LV panel.

2.Megger test

2.HV test

Continuity test check

Insulation test

Earth fault

Voltage measurement 

Current check

Frequency check 

Equipments in the panel should be tested seperately and overall test for LV panels are

1. Visual Inspection

2. Contact Resistance test

3. Interlock checks

4. Auto Transfer Schemes