Schneider Electric A9MEM1570

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 20 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The A9MEM1570 is the three-phase and neutral version of Schneider Electric's PowerTag F63. It fits directly on the top or bottom terminals of a protective device rated up to 63 A, such as an Acti 9 circuit breaker or residual current device, and takes its supply from the circuit it measures through 0.25 m voltage leads. There is no separate current transformer to size or wire.^1, 2

Power

Self-powered from the measured supply. Powered from the circuit it measures through its voltage leads, at most 2 VA. No battery.¹

Maximum current (Imax)

63 A¹

Basic current (Ib)

10 A¹

Starting current

40 mA¹

Accuracy

Class 1 for current, active power, active energy and power factor; Class 0.5 for voltage (IEC 61557-12)¹

Poles

3P + N¹

Network voltage

220 to 240 V AC phase to neutral, 380 to 415 V AC between phases, ±20 %¹

Network frequency

50 or 60 Hz¹

Radio

IEEE 802.15.4, 2.4 to 2.4835 GHz, channels 11 to 26²

Transmit power

10 mW maximum (EIRP)²

Zigbee certification

Green Power Device, certificate ZIG22011GPF20060-24⁶

Operating temperature

-25 to 60 °C¹

Protection

IP20, IK05, indoor use¹

Voltage lead length

0.25 m¹

Dimensions (H × W × D)

20 × 54 × 46.6 mm, sensor element¹

Weight

40 g¹

Standards

IEC 61557-12, IEC 61010-1, IEC 61010-2-030, IEC 61326-1, ETSI EN 300 328¹

Where it is used

• Energy and power per outgoing three-phase feeder in a distribution board, without separate current transformers or a DIN-rail meter.

  Transformer and distribution board monitoring

• Cost allocation where each tenant or department has its own three-phase breaker.

  Tenant submetering and cost allocation

• HVAC plant, heat pumps and other three-phase loads up to 63 A.

  HVAC energy monitoring for commercial buildings

Interface

Readings and settings, with units and ranges where Schneider Electric publishes them.

It is a Zigbee Green Power device, not an ordinary end device or router. It transmits Green Power frames, so the Zigbee network has to accept Green Power devices for its readings to arrive.⁶

Zigbee2MQTT identifies it by the Green Power model ID GreenPower_254 and decodes its frames with a PowerTag converter. Per-phase values carry the suffixes phase_a, phase_b and phase_c; line-to-line voltages are voltage_phase_ab, voltage_phase_bc and voltage_phase_ca.⁷

A Schneider gateway records whether the sensor sits on the top or bottom of the breaker and which side the supply enters, because that sets the direction of energy flow. Check the sign of active power on a known load after you install it.³

Setup

1. Isolate the circuit

   Switch off the supply and prove with a voltage tester that every conductor is dead before you work on the breaker.²

2. Fit the sensor

   Mount it on the top or bottom terminals of the breaker and connect the voltage leads to the matching phase and neutral terminals. Some breakers need the lead ends replaced with AWG22 (0.33 mm²) cable ends.²

3. Open pairing in Edge

   In Edge, open pairing on the Gateway's Zigbee network before you switch the circuit back on.

4. Energise the circuit

   Switch the breaker on. The sensor powers up from its own leads and is discovered as it starts. Schneider commissions large boards the same way, switching circuits on one at a time so each sensor is found in order.³

5. Check one reading

   Compare the phase voltages and currents with a clamp meter on a loaded circuit, and confirm that active power is positive for consumption.

Common questions

Does the A9MEM1570 need a Schneider concentrator?

Not for its Zigbee frames. It is a certified Zigbee Green Power device, and Zigbee2MQTT's definition decodes its measurements directly. The Zigbee network it reports to has to accept Green Power devices.^6, 7

Which breakers does it fit?

It fits the terminals of 3P+N protective devices up to 63 A. Schneider's compatibility guide CA908058E lists each Acti 9, Multi 9 and TeSys device with the top or bottom position it allows. Some devices need the voltage leads fitted with AWG22 (0.33 mm²) cable ends.^2, 5

Can it go downstream of a contactor or drive?

No. With a contactor, variable speed drive or motor starter, Schneider allows it only upstream. Schneider states that PowerTag sensors withstand motor starting inrush currents.^2, 5

How often does it report?

In Schneider's PowerTag system the gateway sets the period between 5 and 60 seconds. Schneider recommends at least 30 seconds where up to 400 wireless devices share a 20 m radius, and 60 seconds up to 600. A voltage loss alarm is sent as an event.⁴