®
2007
1/2
Ia IN/OUT
3/4
Ib IN/OUT
5/6 Ic IN/OUT
7
Neutral
8 and 9
Test pulse output contact
B. CT series
1/2
Ia IN/OUT
3/4
Ib IN/OUT
5/6 Ic IN/OUT
18/17/16
Phase A/B/C
15
Neutral
8 and 9
Test pulse output contact
1.9 Operating
Consumption indication
On the PRO-1250 SERIES’S front panel, there are four LED, in which three LED are for
three phase voltage and another one for impulse.
Reading the meter
The PRO-1250A series energy meter is equipped with a 5+1 register. Five integers are
marked with black color and one decimal is marked with red. The PRO-1250D series
energy meter is equipped with 5+2 LCD display which is used as recording
consumption and can’t be reset to zero. The reading accuracy is 1/100 kWh.
Pulse output
PRO-1250 series DIN rail energy meter is equipped with a pulse output which is fully
separated from the inside circuit. That generates pulses in proportion to the measured
energy. They are test pulse output (pins 8 & 9). Usually, the test pulse output is used
as testing accuracy or reading purpose in close quarters.
The test pulse output is a polarity dependant, passive transistor output requiring an
external voltage source for correct operation. For this external voltage source, the
