CASE STUDY

[Japan] Insulation faults occurred frequently throughout a Japanese traditional inn (ryokan). Since the lighting distribution boards were located in dimly lit areas, it made measurements and inspection work difficult.

【Japan】 * Working place is usually dark since the circuit breaker is turned off at insulation resistance measurement. * Difficult to see the display in the dimly lit location. * Not often, but sometimes the worker forget to turn off the circuit breaker. * Misunderstanding easily happens if multiple scales should be checked depending on the output voltage.