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FAQ
10-If YTL has external control meter?

Answer: Yes. So far, three phase double tariff LCD/counter DIN RAIL meter has this function. External control means using the specified port to control meter tariff. For the defaulted billing, when add 220V to this port, T1 will switch to T2. Such meters could do separate measurment for different power grid. For example, T1 measurement for mains supply, T2 measurement for generating equipment.


11-In three phase CT type LCD meter with RS485, in manual it write display digit as 5+2,6+1,7+0,one meter has so many different display?

Answer: display digit is change according to CT ratio. Different CT ratio has different display digits. When we test in software, it shows 9 digits.


12-For DIN-RAIL meters, how the LED works separately for A phase/.B phase/C phase? it’s flashing according to current value?

Answer: A phase LED is according to A phase power(V*I*COSφ), B phase LED is according to B phase power(V*I*COSφ), C phase LED is according to C phase power(V*I*COSφ); We explain as bellow for A phase LED’s state:

1.If A phase has 230V voltage and no current I=0A- then A phase LED keep in dark.   

2.If A phase has 230V voltage and current value I=20mA- then A phase LED keep very slow flashing. 

3.If A phase has 230V voltage and current value I=100mA- then A phase LED keep slow flashing.

4.If A phase has 230V voltage and current value I=1A- then A phase LED quick flashing.

5.If A phase has 230V voltage and current value reach 10A- then A phase LED will keep light.