ALEKTO E855A User manual

MEASURING TRANSDUCERS
Е855А, Е855В, Е855С
Е854А, Е854В, Е854С
Operation manual
49501860.3.0005 РЭ

49501860.3.0005 РЭ
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Contents
1 Description and operation........................................ ........................... 3
1.1 General Information ........................................ ........................... 3
1.2 Characteristics ................................................. ........................... 4
1.3 Construction .................................................... ........................... 6
1.4 Functional description ..................................... ........................... 6
1.5 Marking and sealing ........................................ ........................... 8
1.6 Packing ............................................................ ........................... 8
2 Uses to assignment .................................................. ........................... 9
2.1 Operational constraints.................................... ........................... 9
2.2 Preparation for use........................................... ........................... 9
2.3 Use................................................................... ........................... 9
2.4 Operation in extreme conditions ..................... ........................... 10
3 Maintenance and repair ........................................... ........................... 11
3.1 Safety............................................................... ........................... 11
3.2 Order of maintenance ...................................... ........................... 11
3.3 Metrology monitoring ..................................... ........................... 11
3.4 Troubleshooting data ........................................ ........................... 12
4 Storage..................................................................... ........................... 13
5 Transportation.......................................................... ........................... 13
Annex A. General Form of the transducer ................. ........................... 14
Annex B. Variants of transducer mounting ............... ........................... 15
Annex C. Diagrams of transducer connections .................................... 16
WARNING! TRANSDUCER HAS A SAFETY SYMBOL SHOWING THAT SPECIFIC
WARNING OR CAUTION INFORMATION IS GIVEN IN A MANUAL, TO AVOID
PERSONAL INJURY OR EQUIPMENT DAMAGE.

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This operation manual contains information for using and operating Measuring Transducers
Е855А, Е855В, Е855С, Е854А, Е854В, Е854С(further - transducers) and information on packing,
transportation and storage.
Read this manual before operation.
1 Description and operation
1.1 General Information
Transducers are intended for a linear alternating-current converting (Е854А, Е854В, Е854С) and
linear voltage converting (Е855А, Е855В, Е855С) to unified output signals of a direct current and can
be applied to monitoring currents and voltages of electrical systems, in the equipment of technical di-
agnostics, for an integrated automation of plants of power engineering and different industries.
Transducers correspond to engineering factors ТУ 4227-005-49501860-00.
Power Supply: 220 V(+10%; –15%); 50Hz.
Transducers are mounted on the rails ТН-35 ГОСТ РМЭК 60715-2003 or immediately on the
panel.
The transducers are hardware SSI products of the third order according to ГОСТ 12997-84.
Vibration and Shock (ГОСТ 12997-84):
- Group N1 – at mounting on the rail (vibration in a frequency band from 10 up to 55 Hz with a
displacement amplitude 0,15 mm);
- Group N2 – at mounting immediately on the panel (vibration in a frequency band from 10 up
to 55 Hz with a displacement amplitude 0,35 mm).
Operating Environment: Group C4 (ГОСТ 12997-84):
- Ambient Air Temperature ...................................................... - 30 to 50 °С;
- Relative Humidity at 35 °C.................................................... up to 95 %;
- Atmosphere pressure.............................................................. 84-106 kPа(630-800 mm Hg).
Climatic category УХЛ3 (ГОСТ 15150-69).
Standard conditions for use:
- Ambient Air Temperature ...................................................... 20±5 °С;
- Relative Humidity .................................................................. 30 to 80 %;
- Atmospheric pressure ............................................................ 84-106 kPа(630-800 mm Hg);
-Power Supply ......................................................................... 220 ±4,4 V.
Guard level IP00 (ГОСТ14254-96, IEC 529-89).
Transducers are single-channel hardware products without galvanic link between input and out-
put circuits.

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1.2 Characteristics
1.2.1 Transducers convert input signal to direct current output signal according to table 1.
Conversion function is linear.
Table 1
Measurement range
Type AC current, АAC voltage, V
Output
DC range,
mA
Load resistance
range, Ω
Е855А
–
0 – 125
0 – 250
0 – 400
75 – 125
150 – 250
0 – 5
0 – 3000
Е855В –
0 – 125
0 – 250
0 – 400
4 – 20 0 – 500
Е855С
–
0 – 125
0 – 250
0 – 400
0 – 20
0 – 500
Е854А
0 – 0,5
0 – 1,0
0 – 2,5
0 – 5,0
– 0 – 5
0 – 3000
Е854В
0 – 0,5
0 – 1,0
0 – 2,5
0 – 5,0
– 4 – 20
0 – 500
Е854С
0 – 0,5
0 – 1,0
0 – 2,5
0 – 5,0
– 0 – 20
0 – 500
1.2.2 Limits of intrinsic error are ±0,5% of the fiducial value.
The following value is taken as a fiducial value:
- upper value of output signal range for the transducers Е855А-0-125, Е855А-0-250, Е855В,
Е855С, Е854А, Е854В, Е854С;
- upper value of input signal measurement range for the transducers Е855А-75-125,
Е855А-150-250.
1.2.3 Variations from influencing magnitudes correspond to table 2.

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Table 2
Name of influencing magnitude Value of influencing
magnitude
Variation, %
of the fiducial value
Ambient Air Temperature - 30 to 50 °C ±0,4 on 10 °Сof tempera-
ture variation
Relative Humidity to 95% at 35 °С±0,9
Frequency 45 to 65 Hz ±0,5
External magnetic field
of frequency 45-65 Hz by strength to 400 А/m
±0,5
1.2.4 Setup time of performance is 15 minutes.
1.2.5 Intrinsic error corresponds:
- On expiring a setup time of performance;
- For Load Resistance Range according to table 1;
- At grounding one of output contacts;
- For Power Supply from 187 to 242 V.
1.2.6 Setting time of output signal is 0,5 s.
1.2.7 Transducers withstand a long-lived break of a load circuit without failures. An output
voltage at a break of a load circuit is no more than 25 V.
1.2.8 Pulsation amplitude 0,1 %.
1.2.9 Transducers withstand 120% overload by an input signal during 2 hours.
1.2.10 Transducers withstand short-term overloads by an input signal according to ГОСТ
24855-81.
1.2.11 Input Power Consumption:
Е854А, Е854В, Е854С.......................................................................... 0,2 V⋅А;
Е855А-0-125, Е855А-75-125, Е855В-0-125, Е855С-0-125 ................. 0,2 V⋅А;
Е855А-0-250, Е855А-150-250, Е855В-0-250, Е855С-0-250 .............. 0,4 V⋅А;
Е855А-0-400, Е855В-0-400, Е855С-0-400 ........................................... 0,5 V⋅А.
1.2.12 Power Supply Consumption:
Е854А, Е855А....................................................................................... 1,5 V⋅А;
Е854В, Е854С, Е855В, Е855С............................................................. 2,5 V⋅А.
1.2.13 Isolation (between an input and power supply, between entering and output, between an
output and power supply) withstands a testing voltage of practically sine-wave shape by frequency from 45
up to 65 Hz according to table 2a, during 1 min.
Table 2a
Upper value of measuring range Testing voltage, kV RMS
Test conditionsAC Current, АAC Voltage, V
standard 5°С
95% R.H. at 3
0,5; 1,0; 2,5; 5,0 – 2,5 1,5
– 125; 250 2,5 1,5
– 400 2,03,5
1.2.14 Electrical ins tion resistanc of ircu ointe in 1.2.13 not less than:
- 40 МΩ- in standard conditions;
- 10 МΩ- 80% R ;
- 2 МΩ- to 95% R.H. at 35°С.
1.2.15 Overall dimension х80х77 mm.
ula e
. at 50°С
c dits p is
to .H
s70
1.2.16 We ht 0,5 kg.ig

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1.3.1 General Form of the transducer can be seen in Annex A.
1.3.2 Transducer has the following parts:
- Case;
- Cover;
- Component board;
- Supply transformer;
- Measuring transformer;
- Latch.
1.3.3 The contacts, established on a cover, ensure strengthening a component board and
reliable contact of conductors of a plated circuit to the leads.
The cover is mounted to a case through four screws, which can be sealed up.
The latch ensures mounting the transducer to the rail or panel depending on variant of installa-
tion.
1.4 Functional description
1.4.1 The transducer is the device of an implicit evaluation (RMS-converter), implementing the
following algorithm of an evaluation:
X(t)2
Y = -------- (1)
Y
or
T
Y = (1/T) ∫[X(t) 2] dt, (2)
0
where Y –output signal,
X(t) – instantaneous value of input signal.
RMS-converter includes the multiplication-division unit (MDU) and low-pass filter. The opera-
tions of multiplication and division fulfill simultaneously at the expense of exponential - logarithmic
feedbacks introduction in MDU.
The following algorithm is implemented in MDU:
T
Y = (1/T) ∫exp [2 ln X(t) – ln Y] dt. (3)
0
1.4.2 Converter Block Diagram is shown in Figure 1.
Transducers Е854 have not resistors R1, R2.
The input signal is transmitted on compensation measuring transformer CMT, which is also
element of a galvanic isolation. Flowing on a primary winding of the transformer CMT input current
I1 establishes a magnetic flux Ф1.
1.3 Construction

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k Diagram Figure 1. Bloc
+9 V
-15V
3
4
CMT
ОA2
ОA3
OC
Ub
5
6SU
1
2
MSC ОA1
VT1.1
VT1.4
VT1.2 VT1.3
R14
R1
R2
R16
R11*
R24
R7
RMS-
converter

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eedback flux Ф2is formed by a current I2, which flows on secondary winding, being simulta-
neously an output one. Unbalance signal is the voltage on a secondary winding. The СМТ output
signal m
DU consists of two log amplifiers (ОA1, ОA2) and exponentiating converter on the transistor
VT1-4. Transistors VT1-2, VT1-3 are switched on in a feedback circuit of a log amplifier ОA1. As
transistors are switched on sequentially, the output voltage ОA1 is proportional to 2ln Uin (t). The
backward logarithmic converter is assembled on an operating amplifier ОA2, in which feedback cir-
cuit the transistor VT1-1 is included.
ll transistors work on exponential sections of volt-ampere characteristics. The voltage affixed
on the “emitter – base” junction of transistor VT1-4 is proportional to a value 2ln Uin (t) - ln Uout.
The current flowing through the resistor R14 is proportional to a collector current of the transistor
VT1-4.
he low-pass filter is realized be operational amplifier ОA3.
he voltage from an output RMC-converter moves to output cascade OC, which serves for
matching a transducer’s output with a load. The resistor R16 regulates the slope of the transmission
characteristic of the transducer. The resistor R24 regulates the initial value of an output signal in
transducers Е855А-75-125, Е855А-150-250, Е855В, Е854В.
.5 Marking and sealing
.5.1 The following information is marked on a cover of the transducer:
The name and type designation;
Manufacturer’s mark;
The nominal value of auxiliary supply voltage and nominal value of auxiliary supply fre-
quency;
Maximal value of power supply (VA);
Input and output signals rated;
Unit symbol of input and output signals;
Frequency range of the input signal;
Overvoltage category;
Load resistance range;
Module of intrinsic error;
The table of connections;
Designation of numbers and po
Symbol
F
oves on the circuit of selecting a module CSM and further on an input of the RMS-converter.
M
A
T
T
1
1
•
•
•
•
•
•
•
•
•
•
•
•larity of terminal;
;
•
Serial number and two last digits of Issue Year.
.5.2 Sealing of the transducer is yielded with a bitumen mastic №1 (according
to ГОСТ 18680-73) applies on one of four located on a cover screws.
.6 Packing
.6.1 The transducers are delivered in transport container.
.6.2 In transport container there is:
Operation manual (1 copy for set of 50 transducers or on separate delivering);
- Packing leaf.
1.6.3 The transducer is packaged into individual packing.
The passport is inserted inside the individual packing.
•
1
1
1
1
-

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2 Uses to assignment
2.1 Operational constraints
2.1.1 The transducers are not intended for operation in requirements explosion-hazard and hos
tile environment.
-
ucer. Unpack it. Take out the trans-
ducer, make exterior survey, get sure that any apparent mechanical damages are missing. Check com-
pleteness of delivering according to table 3.
able 3
ty
2.1 2 The transducers must not be effected by direct heat up to temperature more 50°С. The
transducers should be placed on the premises without sharp temperature fluctuation and off the
sources of strong electromagnetic field.
2.2 Preparation for use
2.2.1 Check integrity of packing after deriving the transd
T
Name and nomenclature Quanti
Transducer 1
Meas n
Е854
uri g Transducers Е855А, Е855В, Е855С, Е854А, Е854В,
С. Passport
1
Measuring Transducers Е855А, Е855В, Е855С, Е854А, Е854В,
Е854
1*
С. Operation manual
Indiv a 1idu l package
Latch 1**
* On a batch in quantity 50 pieces, delivered at the one address
** Se n
t o the case
2.2.2 e er of the transducer on correspondence to required parameters.
2.3 Use
hould be making with observance of live
rules on provision of safe service.
ex B.
THE AUTOMATIC SWITCH OR THE SWITCH PLACED IN IMMEDIATE
ITY FROM THE TRANSDUCER SHOULD BE INCLUDED IN
INSTALLATION OF BUILDING WIRING. THE SWITCH SHOULD BE MARKED AS
SWIT
on plant
-ccording to figure B.1 to link the protuberances of a case to edge of the rail;
-
at mount the rail on a horizontal or ver-
tical plane.
Ch ck the information on a cov
2.3.1 All operations on mounting and maintenance s
2.3.2 Make arranging a place of mounting of the transducer on plant according to an Ann
WARNING!
PROXIM
CHING-OFF DEVICE FOR THE TRANSDUCER.
2.3.3 Installation of the transducer
2.3.3.1 When mounting the transducer on the rail:
place a latch a
push a case up to its fixing.
The mounting of the transducer on the rail is supposed

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When the rail is mounted on the vertical plane, its distortion from a horizontal position should
not be more than 15°.
.3.3.2 When mounting the transducer on the panel:
- the help of two screws according to figure B.2;
- pull the transducer over a latch against the stop.
Use two screws with a diameter 4 mm to fasten a latch on the panel. Screws should not overhang
a mou
ng the transducer on a latch it is necessary to provide on object a place not less
than 1
h is
.3.5 Verify the correspondence of output parameters of a radiant of a signal to data-ins of the
transducer. Verify quality of wiring.
ge 220 V on the transducer.
.3.7 Turn on an input signal on the transducer.
u should turn out the transducer immediately in case of originating an emergency
condi
atic switch should be used for cutting off.
2
fix a latch on the panel with
nting plane of the latch.
When mounti
5 mm for initial fixing of the transducer.
2.3.4 Fix exterior conductive wires on contacts according to the table of connections, whic
located on a cover of the transducer.
2
2.3.6 Turn on supply volta
2
2.4 Operation in extreme conditions
2.4.1 Yo
tion of operation.
The switch or autom