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DIRIS A10

Multifunction meters – MFM

Modular multifunction meter

DIRIS A10
DIRIS A10
Function
  • The DIRIS A10 is a modular multifunction meter for measuring electrical values in low voltage networks. It allows all electrical parameters to be displayed and utilised for communication and/ or output functions.
Advantages
Easy to use
  • Five direct access pushbuttons enable all measurements to be clearly viewed on its backlit LCD display.
Integrated temperature sensor
  • It allows variations in temperature to be detected.
Detects wiring errors
  • An integrated test function can be utilised to detect incorrect wiring and to automatically correct CT installation errors.
Compliant with IEC 61557-12
  • IEC 61557-12 is a high-level standard for all PMDs (Performance Monitoring Devices) that are designed to measure and monitor electrical parameters in distribution networks. Compliance with IEC 61557-12 ensures a high level of equipment performance, in terms of metrology, and the mechanical and environmental aspects (EMC, temperature, etc.).
Principle diagram
principal diagram DIRIS A10
Functions
Multi-measurement Metering
Currents – Active energy: + kWh
– instantaneous: I1, I2, I3, In – Reactive energy: + kVarh
– maximum average: I1, I2, I3, In – Hours
Voltages & frequency
– instantaneous: V1, V2, V3, U12, U23, U31, F
Power
– instantaneous: 3P, ΣP, 3Q, ΣQ, 3S, ΣS
– maximum average: ΣP, ΣQ, ΣS
Power factors
– instantaneous: 3PF, ΣPF
Harmonic analysis Dual tariff function
Total harmonic distortion (level 51) – Selection of one out of 2 billing tariffs
– Currents: thd I1, thd I2, thd I3
– Phase-to-neutral voltage: thd U1, thd U2, thd U3
– Phase-to-phase voltage: thd U12, thd U23, thd U31
Events Communications(1)
– Alarms on all electrical values – RS485 with MODBUS protocol
Input Output
– Tariff selection – Remote command of device
– Remote device status – Alarm report
– Pulse report
(1) Available on specific version (see the following pages).

 

Front panel

front panel DIRIS A10  1. Backlit LCD display.
2. Direct access key for currents (instant and maximum), current THD and test function.
3. Direct access key for voltages, frequency and voltage THD.
4. Direct access key for active, reactive and apparent power (instantaneous and max. values) and power factor.
5. Direct access key for energies.
6. Pushbutton for hour meter, temperature and programming menu access.
7. Metrological LED.

 

Electrical characteristics

DIRIS A10
Current measurement on high-impedance inputs (TRMS)
Via CT primary 9 999 A
Via CT secondary 5 A
Measurement range 0 … 11 kA
Input consumption 0.6 VA
Measurement updating period 1 s
Accuracy 0.2 %
Permanent overload 6 A
Intermittent overload 10 In for 1 s
Voltage measurements (TRMS)
Direct measurement between phases 50 … 500 VAC
Direct measurement between phase and neutral 28 … 289 VAC
Input consumption ≤  0.1 VA
Measurement updating period 1 s
Accuracy 0.2 %
Permanent overload 800 VAC
Power measurement
Measurement updating period 1 s
Accuracy 0.5 %
Power factor measurement
Measurement updating period 1 s
Accuracy 0.5 %
Frequency measurement
Measurement range 45 … 65 Hz
Measurement updating period 1 s
Accuracy  0.1 %
Energy accuracy
Active (according to IEC 62053-22) Class 0.5 S
Reactive (according to IEC 62053-23) Class 2
Auxiliary power supply
Alternating voltage 110 … 277 VAC
AC tolerance ± 15 %
Frequency 50 / 60 Hz
Consumption < 3 VA
Digital output (pulses or on/off)
Number 1
Type 20 / 30 VDC – 0.5 A – 10 VA
Max. number of operations ≤  108
Input (tariff)
Number 1
Type 0 VAC: T1 / 200-277 VAC: T2
Communication
Link RS485
Type 2 … 3 half duplex wires
Protocol MODBUS RTU
MODBUS® speed 2400 … 38400 bauds
Operating conditions
Operating temperature – 10 … + 55 °C
Storage temperature – 20 … + 70 °C
Relative humidity 85 %

 

Case

case DIRIS A10
DIRIS A10
Current measurement
Type modular
Number of modules 4
Dimensions W x H x D 72 x 90 x 64 mm
Case degree of protection IP 30
Front degree of protection IP 52
Display type backlit LCD display
Rigid cable cross-section 4 mm2
Flexible cable cross-section 2.5 mm2
Weight 205 g (4825 0010) – 215 g (4825 0011)

 

Connection

Recommendation:
– For IT earthing systems, it is recommended that the CT secondary is not connected to earth.
– When disconnecting the DIRIS, the secondary of each current transformer must be short-circuited. This operation can be carried out automatically by a SOCOMEC PTI, an accessory which is included in this catalogue. Please consult us.
– It is recommended that the earthing point for the DIRIS A10 and the current transformer secondaries are not earthed at the same time.
Low voltage balance network
3/4 wires with 1 CT Single-phase Two-phase
3-4 wires with 1 CT DIRIS A10 single phase DIRIS A10 two phase DIRIS A10
1. Fuses 0.5 A gG / 0.5 A class CC. 1. Fuses 0.5 A gG / 0.5 A class CC. 1. Fuses 0.5 A gG / 0.5 A class CC.
Low voltage unbalance network
3/4 wires with 3 CTs 3 wires with 2 CTs 3 wires with 2 CTs
3-4 wires with 3 CTs DIRIS A10 3 wires with 2 CTs DIRIS A10 3 wires with 2 CTs 2 DIRIS A10
1. Fuses 0.5 A gG / 0.5 A class CC. Use of 2 CTs reduces by 0.5% the accuracy of Use of 2 CTs reduces by 0.5% the accuracy of
the phases, the current of which is worked out the phases, the current of which is worked out
by vector calculation. by vector calculation.
1. Fuses 0.5 A gG / 0.5 A class CC. 1. Fuses 0.5 A gG / 0.5 A class CC.

 

Additional information

Communication via RS485 link AC auxiliary power supply
communication via RS485 link DIRIS A10 AC auxiliary power supply DIRIS A10
1. Fuses 0.5 A gG / 0.5 A class CC.

Terminals

Terminals DIRIS A10
AUX: auxiliary power supply US
V1, V2, V3 & VN: voltage inputs S1 – S2: current inputs
Communication terminals Pulse or alarm output terminals Input terminals
Communication terminals DIRIS A10 Pulse or alarm output terminals DIRIS A10 Input terminals DIRIS A10

References

Basic device DIRIS A10
Description Reference
DIRIS A10 (available in light grey on request) 4825 0010
DIRIS A10 with RS485 MODBUS communication (available in light grey on request) 4825 0011
Description of accessories To be ordered in multiples of Reference
Fuse disconnect switches for the protection of voltage inputs 4 5601 0018
(type RM) 3 poles
Fuse disconnect switches for the protection of the auxiliary supply 6 5601 0017
(type RM) 1 pole + neutral
Fuses type gG 10×38 0.5 A 10 6012 0000
Current transformer range 1
Management software for DIRIS