janitza UMG 801, Руководство пользователя

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Pulse output
The digital outputs can be used to output pulses
for counting the active energy, apparent energy
and reactive energy. To do so, a pulse is generated
at the output after a certain, configurable amount
of energy has been reached.
To use a digital output as a pulse output, configure
the corresponding settings in the configuration
assistant of the GridVis
®
software:
·Output polarity: Normally open, normally closed
·Mode for the digital output: S0 output
·Pulse valency
·Pulse width
Pulse valency
The pulse valency indicates how much energy (Wh
or varh) corresponds to one pulse.
The pulse valency is determined by the maximum
connected load and the maximum number of
pulses per hour.
If you indicate the pulse valency with:
·A positive sign, pulses are only output if the mea-
sured value also has a positive sign.
·A negative sign, pulses are only output if the
measured value also has a negative sign.
INFORMATION
Since the Active energy meter operates with a
reverse running stop, the device only sends pulses
when electrical energy is consumed.
Since the Reactive energy meter operates with a
reverse running stop, the device only sends pulses
when there is an inductive load.
1. Determine pulse valency
Set the pulse length according to the require-
ments of the connected pulse receiver. With a
pulse duration of 30 ms, for example, the de-
vice can deliver a maximum number of 60000
pulses per hour (see table "Maximum pulses"
on page 71).
Pulse valency =
Max. connected load
Max. number of pulses/h
[Pulses/Wh]
Pulse valency = 135 kW / 60000 pulses/h
Pulse valency = 0.00225 pulses/kWh
Pulse valency = 2.25 pulses/Wh
Abb. Connection example for wiring as a pulse output.
+ -
230 VAC
24 VDC
External
operating voltage
1.5k
Data logger
22
23
Digital Output 4
24
Digital Output 3
25
Digital Output 2
26
Digital Output 1
+24V=
UMG 801
Switching and pulse outputs
INFORMATION
When using the digital outputs as pulse outputs,
measurement errors can occur due to residual rip-
ple. For the supply voltage (DC) of the digital inputs
and outputs, use power supplies whose residual
ripple is less than 5% of the supply voltage.
Determine maximum connected load
Example:
Current transformer
= 150/5 A
Voltage L-N = max. 300 V
Power per phase
= 150 A x 300 V
= 45 kW
Power with 3 phases
= 45 kW x 3
Max. Connected load = 135 kW
2. Calculate pulse valency