Yokogawa PR300 Power and Energy Meter - Manual (Page 60)

Appendix
A-3 IM 77C01E01-01E
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Appendix 1 Specifications of PR300
Digital Input Specifications
It is used for control signals for optional integration or demand alarm release.
Control signal for optional integration: Starts and stops measurement of optional active energy.
Demand alarm release (with demand measuring function): Releases demand alarm.
Number of inputs 1
Input signal Voltage signal; ON signal: 4.5 to 25 V DC; OFF signal: within Ϯ1 V DC
Minimum ON time 50 ms
(Note 1) The control signal for optional integration can be controlled via communication. Once it is
controlled by digital input, it is the only means for controlling until the system is reset. System
reset can be performed via communication or by turning off/on of the power of the PR300.
(Note 2) In the PR300 with the demand measuring function, digital input can be used only to cancel the
demand alarm and cannot be used for control signals for optional integration.
Analog Output Specifications (additional output function)
The measured value is converted into the direct current signal for outputting.
Measurement item for output
One of active power, reactive power, apparent power, voltage-1, voltage-2, voltage-3, current-1,
current-2, current-3, power factor, and frequency
Output signal 4 to 20 mA DC
Output accuracy Measurement accuracy of measurement item for output +( Ϯ0.5% of F.S.)
Allowable load resistance
0 to 600 ⍀
Response speed 2 seconds or less (until Ϯ1% of the final value is reached)
Setting item Selection of measurement item for output, and lower, and upper limits of scaling
Setting range of lower/upper limits of scaling according to measurement item for output
Active power –rated power (W) to rated power (W)
Reactive power –rated power (var) to rated power (var)
Apparent power 0 to rated power (VA)
Voltage-1 to 3 0 to voltage range (V)
Current-1 to 3 0 to current range (A)
Power factor (LEAD) 0.5 to 1 to (LAG) 0.5
Frequency 45 to 65 (Hz)
Pulse Output Specifications (additional output function)
The pulse proportional to the energy is output.
Measurement item for output
One of active energy, regenerative energy, LEAD reactive energy, LAG reactive energy, and
apparent energy
Number of outputs 1
Output signal Open collector
Contact capacity 30 V DC, 200 mA
Pulse unit 0.1 to 5000.0 kWh/pulse (changeable in increments of 100 Wh)
Setting item Measurement items for output, pulse unit, and ON pulse width
ON pulse width The ON time of the output pulse is shown.
Setting range: 10 to 1270 ms (changeable in increments of 10 ms)
Setting should be made not to exceed the value of the maximum ON pulse width calculated by
the following equation:
Maximum ON pulse width (ms) =
Pulse unit [kWh/pulse] ϫ 3600 ϫ 1000 2
Secondary rated power [W] ϫ VT ratio ϫ CT ratio ϫ 1.2 ϫ 2
The pulse unit of reactive energy is kvarh/pulse, and that of apparent energy is kVAh/pulse.