Autometers Systems A-400P Programming And Installation Brochure - Page 12

Browse online or download pdf Programming And Installation Brochure for Measuring Instruments Autometers Systems A-400P. Autometers Systems A-400P 17 pages. Mid approved sgs.uk appendix b and d, measures kwh, kvarh, kvar,pf,hz, max demand, rs 485 modbus autometers v6 protocol, two pulse outputs, bi- directional measurement for import and export, back light lcd for full viewing angles, available as 1 phase 2 w

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5. Specification

5.1 Measured Parameters

The unit can monitor and display the following parameters of a single phase two wire(1p2w),

three phase three wire(3p3w) or four phase four wire(3p4w) system.

5.1.1 Voltage and Current

Phase to neutral voltages 100 to 289V a.c. (not for 3p3w supplies).

Voltages between phases 173 to 500V a.c.

Percentage total voltage harmonic distortion (THD%) for each phase to N ( not for 3p3w supplies).

Percentage voltage THD% between phases (three phase supplies only).

Current THD% for each phase

5.1.2 Power factor and Frequency and Maximum Demand

Frequency in Hz

Instantaneous power:

Power 0 to 99999 W

Reactive power 0 to 99999 VAr

Volt-amps 0 to 99999 VA

Maximum demanded power since last Demand reset Power factor

Maximum neutral demand current, since the last Demand reset (for three phase supplies only)

5.1.3 Energy Measurements

Imported/Exported active energy........

Imported/Exported reactive energy.....

Total active energy................

Total reactive energy............

5.2 Measured Inputs

2 Voltage inputs through 4-way ﬁxed connector with 25mm stranded wire capacity. single phase

two wire (1 p2w), three phase three wire (3p3w) or three phase four wire (3p4w) unbalanced.

Line frequency measured from L 1 voltage or L3 voltage.

5.3 Interfaces for External Monitoring

Three interfaces are provided:

RS 485 communication channel that can be programmed for Modbus RTU protocol

Relay output indicating real-time measured energy (conﬁgurable)

Pulse output 3200imp/kWh (not conﬁgurable)

The Modbus conﬁguration (baud rate etc.) and the pulse relay output assignments (kW/kVArh,

import/export etc.) are conﬁgured through the set-up screens.

5.3.1 Pulse Output

The pulse output can be set to generate pulses to represent kWh or kVArh.

Rate can be set to generate 1 pulse per:

0.01 = 10 Wh/VArh

0.1 = 100 Wh/VArh

1 = 1 kWh/kVArh

10 = 10 kWh/kVArh

100 = 100 kWh/kVArh

Pulse width 200/100/60 ms.

Relay Rating 240V ac 50mA

0 to 9999999.9 kWh

0 to 9999999.9 kVArh

0 to 9999999.9 kWh

0 to 9999999.9 kVArh