Multifunction digital panel meters SchM96, SchM120

SchM96, SchM120 is designed for measurement of electric parameters of 3 or 4-wire three-phase an alternating current by frequency of 45-55 Hz with symmetric and asymmetrical loading.

Devices are used in systems of data gathering for transfer of results of measurement to systems of top level or as the universal measuring device, instead of di$erent electric devices: ampermeters, voltmeters, wattmeters, varimeters, frequency counter. In devices possibility is provided:
-Reprogramming of display ranges;
-Set value min and max within a measurement range;
-Regulation of brightness of indication;
-Connections of external modules of indication.

Specifications

Documentation

Overall drawings

Related products

Type	Overall dimensions, mm	Sign height, mm	Weight, kg, maximum
SchM96	96 х 96 х 75,6	20	0,5
SchM120	120 х 120 х 75,6	25	0,9

Measured and calculated parameters	Basic error, %	Designation	Measured parameters
Measured and calculated parameters	Basic error, %	Designation	SchM96, SchM120	SchM96PQ, SchM120PQ
Phase voltage RMS	±0,2	U_A, U_B, U_C	+	-
Average voltage RMS	±0,2	U_av.ph	+	-
Phase-to-phase voltage RMS	±0,2	U_AB, U_BC,U_CA	+	-
Average effective line-to-line voltage value	±0,2	Uav.l	+	-
Effective phase current value	±0,2	I_A, I_B, I_C	+	-
Average effective phase current value	±0,2	I_av.	+	-
Active load phase power	±0,5	Р_A, Р_B, Р_C	+	+
Total active power	±0,5	Р	+	+
Reactive load phase power	±0,5	Q_A, Q_B, Q_C	+	+
Total reactive power	±0,5	Q	+	+
Full load phase power	±0,5	S_A, S_B, S_C	+	+
Total gross reactive power	±0,5	S	+	+
Power factor in each phase	±0,5	Cos φ_A, Cos φ_B, Cos φ_C	+	-
Total power factor	±0,5	Cos φ	+	-
Frequency	±0,01 Hz	F	+	-

Information display
Type of display	Display of measured parameters of current, voltage, frequency, power, power factors, power flow direction, units of measurements
Seven-segment indicators	7-digit LED (3 lines of 4 digits), digit height: 25 mm (SchM120), 20 mm (SchM96)
Additional features	Connection of indication modules MI120, MI80
Telemetry
Rated voltage	0,5 А; 1 А; 2,5 А; 5 А
Rated current	100 V, 400 V
Frequency	45...55 Hz
Measurement time	0.1 s
Time of setting output analogue signal, max	0.5 s
Basic error limits	by current and voltage: ± 0.2%; by power: ± 0.5 %; by frequency: ± 0.01 Hz; by analogue output: ± 0.5%
Galvanic isolation of input and output circuits, power circuits	Yes
Short-term overloads by input signal with ratio (maximum)	Ratio: 20; number of overloads: 2; duration of each overload, s: 0.5; interval between two overloads, s 0.5.
Input resistance, min by current circuits: by voltage circuits:	0.02 Ω 2 MΩ
Communication interfaces/analogue output
RS485	Quantity: 1,2; protocols: Modbus RTU Data rate: 4800, 9600, 19200, 38400, 57600 baud.
Ethernet (100 BASE TX)	Quantity: 0,1; protocols: Modbus TCP, IEC 60870-5-104
Analogue output	Quantity: 0,1,2,3; reprogrammed ranges: 0...5 mA, 4...20 mA, 0…20 mA, 0...2.5...5 mA, 4...12...20 mA, 0…10…20 mA, -5...0...+5 mA
Remote indication
Digital inputs	Quantity: 0, 4, 6, 8, “dry contact” type, voltage 24 V, current 10 mA
Distant control
Digital outputs	Quantities: 0, 1, 2, 3 (switch on/off, interlocking) = 300 V, ~200 V, 100 mA
Power supply voltage
Power supply	– 220 VU – universal power from 85 to 253 VAC, 50 Hz or from 120 to 265 VDC; – 24 VN (24+12/-6) V
Power consumption from power circuit, max.	15 VA
Meter reprogramming (setting)
Reprogramming	– via program “Configuration Manager” (interface RS485, Ethernet); – with buttons on the front frame (if any).
Reprogramming parameters	– indices range (meters with rated currents of 1 A, 5 A and voltage of 100 V) – password setting; – indication update period: from 0.1 to 10 s; – position of decimal point; – settings for each electrical value (with discrete outputs of up to 3 control signals for commutation equipment); – Interfaces RS485, Ethernet parameters; – output signal parameters; – indication brightness; – parameters of protocol Modbus RTU, Modbus TCP, IEC 60870-5-104 (via program “Configuration Manager»); – Calibration of input and output signals.
Operation Conditions
Temperature operation range	from -40°С to +70°С
Protection extent	IP50
Installation	Panel
Wires section	2.5 mm²
Maximum input signal overload (duration)	150% (2 h)
Calibration interval	10 years
Guarantee period	60 months
Average service life, min	30 years
Mean time between failures	250,000 h.

Order form

SchMa – b – с – d – e – f – g – h – i – j

SchMa – meter type depending on its overal dimensions:

SchM96; SchM120;

b – rated voltage:

– line voltage – 100 V, 400 V;

– voltage transformation factor (rated secondary winding voltage of 100 V);

c – rated current:

– phase current – 0.5 А; 1.0 А; 2.5 А; 5.0 А;

– current transformation factor (rated secondary winding current of 1 А and 5 А);

d – reference designation of supply voltage:

– 220 VU – universal power: supply voltage of 85 to 253 VAC, 50 Hz or 120 to 265 VDC;

– 24VN – DC supply voltage of (24+12/-6) V;

e – reference designation for availability of additional interface RS485 and digital inputs:

– х – absence of additional interface and digital inputs,

– RSX – availability of additional interface with the absence of digital inputs,

– RS04 – availability of additional interface and 4 digital inputs,

– RS06 – availability of additional interface and 6 digital inputs (for SchM120 only),

– Х08 – absence of additional interface with the availability of 8 digital inputs;

Note: with the absence of digital inputs (е = х, е = RSX) the meter may have a design with output signals (analogue or digital).

f – reference designation for the availability of interface Ethernet, hours of real time:

– х – specified with the absence,

– RE – availability of interface Ethernet;

g – reference designation of measurement design:

– 3W - for three-wire connection scheme,

– 4W - for four-wire connection scheme;

h – indicators colour

– R – red indicators,

– G – green indicators,

– Y – yellow indicators,

– TS – (“Touch Screen”) colour liquid-crystalline display (TS for SchM120 only);

i – availability of output signals

– х – specified with the parameter absence;,

– 01 – availability of one digital output;

– 02 – availability of two digital output;

– 03 – availability of three digital output;

– 10 (a) – availability of one output analogue signal,

– 20 (a, b) – availability of two output analogue signals,

– 30 (a, b, c) – availability of three output analogue signals where а, b, c – reference designations of measurement ranges of output analogue signals (А = 0…5 mA; В = 4… 20 mA;

С = 0…20 mA; АР = 0…2.5…5 mA; ВР = 4…12…20 mA;

СР = 0…10…20 mA; ЕР = -5…0…5 mA) (Example: (30 (С, А, В); 30 (В, В, С); 20 (С, В); 20 (А, А); 10 (А));

j – custom design

– otherwise, this parameter is not specified

– P – active power meter design;

– Q – reactive power meter design;

– PQ – active and reactive power meter design.

SchMa meter type	Full reference designation code parameter
	Rated value or factor of transformation		Power supply voltage	Availability of additional interface and digital inputs	Availability of interface Ethernet	Reference designation of measurement design	Indication colour	Availability of output signals	Custom design
	b	c	d	e	f	g	h	i	j
SchM96	U; U/100	I;I/1; I/5	+	х; RSX	x; RE	+	R, Y, G	+	+
				RS04; X08				х
SchM120	U; U/100	I;I/1; I/5	+	х; RSX	x; RE	+	R, Y, G	+	+
				RS04; RS06; X08				х
Notes Sign “+” means that availability of all possible versions of a parameter in the order formula. Sign “x” means that no parameter is available.

Ordering example

SchM120 – 400V – 5А – 220VU – RSX – х – 4W – Y – 30 (А, В, СР) TU 25-7504.211.1-2010

For SchM120 meter with the following characteristics: rated voltage of 400 V, rated current of 5.0 A, supply voltage of 85 to 253 VAC, 50 Hz or 120 to 265 VDC, the availability of additional interface RS485, 4-wire measurement design, yellow indicator colour, availability of 3 analogue outputs (0…5) mA; (4…20) mA; (0…10…20) mA.

Сertificate of conformity (pdf, 560.3 Kb ) View Download

Manual (pdf, 2 Mb ) View Download

Has been found to conform to requirements Russian Maritime Register of Shipping (pdf, 470.4 Kb ) View Download

Display panel MI120, MI80

Data display Т44, Т54, Т74

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Multifunction digital panel meters SchM96, SchM120

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