True RMS measuring transducers equipped with Ethernet and RS485 interfaces

AEMT series measuring transducers are intended to be used for measuring electrical quantities in AC, DC and pulse current circuits.

AEMT series measuring transducers are intended to be used for measuring electrical quantities in AC, DC and pulse current circuits.

Thanks to wide range of input voltages (up to 300V), AEMT transducers can be used for condition monitoring of UPS systems, power distribution cabinets (boxes) and other industry objects. AEMT transducers can also be used for energy accounting and measuring of quantity of electricity.

AEMT transducers should be used with external current sensors (shunt resistors, current transformers and Hall sensors).

One AEMT transducer can at the same time operate as:

-         Two DC ammeters

-         Two AC (AC+DC) ammeters

-         Two DC voltmeters

-         Two AC (AC+DC) voltmeters

-         Two DC wattmeters

-         Two AC (AC+DC) wattmeters

-         Two varmeters

 

Metrological characteristics:

Преобразователь АЕМТ обеспечивает измерение электрических величин постоянного и переменного тока по двум каналам измерений:

- DC voltage UDC	Performance class 0,2 according to IEC 61557-12
- DC current IDC	Performance class 0,5 according to IEC 61557-12
- DC power PDC	Percentage error 1%
- DC energy WDC	Percentage error 1%
- Quantity of electricity QDC	Percentage error 1 %
- Voltage RMS value UAC	Performance class 0,5 according to IEC 61557-12
- Current RMS value IAC	Performance class 0,5 according to IEC 61557-12
- Active power P	Performance class 2 according to IEC 61557-12
- Reactive power PQ	Performance class 2 according to IEC 61557-12
- Apparent power PS	Performance class 2 according to IEC 61557-12
- Power factor PF	Error ±0,05

AEMT series transducers also feature measuring of DC energy and quantity of electricity.  Measuring is being processed in both directions continuously or during set period of time.

Additional measurements for each channel:

- Frequency

- DC Power (Active power integrated over time) for both AC and pulsating current

Measurement data (digitalized) is transmitted via two independent interfaces: Ethernet and RS-485.

Communication protocols:

RS-485: MODBUS-RTU, MODBUS-ASCII, IEC 60870-5-101, «ExtDev» (for transmitting measurement data to indication devices);

Ethernet: MODBUS-TCP/IP, IEC 60870-5-104

Measurement data renewal interval – 100 ms

Measured values can also be displayed on AED and AEGD indication devices. AEGD is powered directly from AEMT transducers.

 

Examples of application

 

Versions

AEMT–	C	х	х	–	V	х	х	– х
	C								External current sensors specifications (channel #1, channel  #2)
		1	1						Shunt resistor, 75mV
		2	2						Current sensor, nominal output current 100 mA
		3	3						Current sensor, nominal output current 100 mA
					V				Nominal input voltage (channel #1, channel #2)
						1	1		30 V
						2	2		75 V
						3	3		150 V
						4	4		300 V
									Power supply
								1	Universal: - 220V DC - 230 V AC, 50 (60) Hz
								2	110 V DC
								3	DC supply with U output voltage (Can be produced by custor order. U value is agreed with customer, 100 V minimum)