CIRCUTOR DHB Series - Manual (Page 5)

5
1. APPLICATION AND METER DESIGN
The DHB-3xx meter is a programmable digital panel meter destined
for the measurement of a.c. voltage, a.c. current, active, reactive and
apparent power, cos
ϕ, tg ϕ, ϕ, frequency, active, reactive and appar-
ent energy, 15, 30 and 60 minutes’ active power, 10 minutes’ voltage,
10 seconds’ frequency.
Additionally, the meter enables the indication of the current time. The
readout field is composed of a display which allows to expose results in
red, green and orange colours.
Features of the DHB-3xx meter:
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display colour individually in three ranges,
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thresholds of displayed overflows,
l
2 NOC relay alarms operating in 6 modes,
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2 switched relay alarms operating in 6 modes (DHB-324),
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signaling of measuring range overflow,
l
automatic setting of the decimal point,
l
programming of voltage and current ratios,
l
programming of alarm and analog outputs with the reaction on any
measured value, independently of the currently displayed value,
l
storage of maximal and minimal values of all input quantities,
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reset of all watt-hour meters: active and reactive energy,
l
programmed kind of 15, 30 or 60 minutes’ active power measurement:
mean walking or synchronization with the RTC clock,
l
manual synchronization of 15 minutes” power, 10 minutes’ voltage,
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monitoring of set parameter values,
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interlocking of parameter introduction by means of a password,
l
service of the interface with MODBUS protocol in the
RTU mode (DHB-324),
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updating of software through interface RS485,
l
conversion of the measured value into a standard – programmable
current or voltage signal (DHB-324),