B&K Precision 308A – Digital Insulation and Continuity Meter

• 3 1/2 Digit Insulation Tester
• Large LCD display
• Three Insulation test voltage 250V ,500V,1000V
• External voltage warning indication
• Automatic circuit discharge

The model 308A insulation tester is intended primarily for periodic testing of industrial motors, transformers, electrical wiring, and cable insulation for signs of deterioration. Low readings may indicate impending failure allowing for permit replacement of suspect component during routine maintenance rather than risking component failure. It is also useful for safety testing of TV sets and appliances to assure no hazardous leakage current. The voltage and resistance ratings for insulation testing are often specified for the product to be tested.

Why Test is Necessary?

• Insulation
• Every electrical apparatus and installation needs to be safe for the user and for the equipment itself.
• Electrical conductors of electricity need to be insulated from each other so that they do not create an electrical hazard or unnecessary consumption.
• Poorly insulated circuits can create leakage current which can be dangerous and trip your GFCI, RCCB or ELCB.
• Each country regulates levels at which the insulation levels are acceptable. Generally, Insulation resistance measurement should be done between each conductor and the earth, and between each conductor.
• Continuity
• Checking the continuity of wires, complete circuits, connections, closure of contacts, circuit breakers, fuses, bounding resistance of connections, etc… are all very important to ensure wire integrity.