Elcomponent AEM33 485 DIN User manual

AEM33 485 DIN
INSTRUCTIONS
This instrument is manufactured in compliance with EN61010-1
Cat III for nominal operating voltages of 400V L-L and 230V L-N, to
ensure safe operation the user must comply with the following
instructions:
• Ensure that the supply voltage is correct.
• The auxiliary mains supply is internally fused at 250V, 100mA
Type 2. External fusing is required if the auxiliary supply
voltage exceeds 250V.
• Maintenance and/or repairs must be carried out only by
qualified, authorised personnel.
• If there is ever the suspicion that safe use is no longer
possible, the instrument must be disconnected and
precautions must be taken against accidental use.
• Operation is no longer safe:
1) If there is clearly visible damage
2) If the instrument no longer functions
3) After prolonged storage in unsuitable conditions.
Read these instructions carefully before installing and utilising the
instrument.
The instrument described in this user manual is intended for use
by properly trained staff only. Maintenance and/or repairs must
be carried out by authorised personnel only. For proper, safe use
of the instrument and for maintenance and/or repair, it is
essential that the persons instructed to carry out these
procedures follow normal safety precautions.
CAUTION: Failure to follow the instructions may result in
personal injury or damage to equipment.
NOTE: Failure to follow the instructions may result in an
instrument malfunction.
CAUTION: The instrument is internally fused at 250V 100mA.
External fusing is required if the supply voltage exceeds 250V.
(OPT)
(OPT)
(OPT)
1 SAFETY
1.1 OPERATOR SAFETY
2 SYMBOLS
3 CONNECTION DIAGRAMS

The AEM33 is suitable for use with current transformers (CTs)
with 5A secondary output. Metering quality CTs of Class 1
accuracy with a minimum rating of 2.5VA are recommended.
Connections should be made according to the diagrams above.
CAUTION:
The pulse output contacts are rated at 100mA AC/DC, 100V max.
Under no circumstances should this rating be exceeded.
The AEM33 is fitted with dual pulse outputs. Output 1 provides a
pulse proportional to kWh, output 2 provides a pulse proportional
to kVArh. Each output has a telltale l.e.d. on the front panel
which flashes ‘on’ to indicate a pulse being generated.
The pulse connections are as follows:
Pulse 1: Terminals 31 & 32
Pulse 2: Terminals 29 & 30
The contacts are volt free and therefore an external power supply
must be provided.
The RS485 output consists of 3 terminals (15, 16 & 17) at the top
left of the unit. These should be connected via the correct
specification cable to the data bus. (Refer to Elcomponent for
cable recommendations.) Terminal connections are as follows:
15 = A 16 = B 17 = 0 V ( A&B are signal cables.)
NOTE: It is essential that the polarity is respected when
other units are connected to the bus.
When the instrument is powered up, the display will initially show
the internal software version, then after a few seconds will start
displaying measured values. The four buttons allow the user to
scroll through the available measurements.
ENERGY DISPLAYS
Press to select kWh, kVArh and Hours Run display pages.
The Hours Run register accumulates the total time during which
the average 3 phase load current exceeds a preset level. This is
always displayed with a resolution 0.1 hour.
The percentage level of (l1+l2+l3) at which the Hours Run register
accumulates is user programmable from 1% to 100% of full scale
current.
Press and together and hold for 2 seconds to reset the
hours run register.
3.1 CONNECTION OF THE CURRENT INPUT
3.2 PULSE OUTPUT CONNECTIONS
4 INSTRUMENT OPERATION & SET-UP
3.3 RS485 CONNECTIONS

VOLTAGE DISPLAYS
Press to select from the following displays:
CURRENT DISPLAYS
Press to select the following display
:
POWER DISPLAYS
Press to select from the following displays:
NOTE: The values for phase power factor may be used to
verify correct CT position & orientation.
INSTRUMENT SET-UP
The display shows the CT set-up screen. The instrument settings
are entered from this point, starting with the CT values.
CT SET-UP
To enter programming mode press and simultaneously
for 5 seconds. The CT primary value may then be set from the
following nominal values (secondary value must be 5A):
5, 10, 15, 20, 30, 40, 50, 60, 80, 100, 150, 200, 250, 300, 400, 500,
600, 800, 1000, 1200, 1250, 1500, 1600, 2000, 2400, 3000, 2500,
4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500, 8000, 8500,
9000, 9500, 10000, 10500, 11000, 11500, 12000, 12500, 13000,
13500, 14000, 14500, 15000, 15500, 16000, 16500, 17000, 17500,
18000, 18500, 19000, 19500, 20000, 205000, 21000, 21500,
22500, 23000, 23500, 24000, 24500, 25000
Press the p or q key until the desired current is displayed. If the
desired CT value is not present in the above list, the ratio may be
‘fine adjusted’ as follows: Press and hold the t and p buttons
simultaneously for 2 seconds to enter ‘Fine Adjust Mode’. This is
indicated by a decimal point displayed immediately to the right of
the defined parameter viz: “Ct.” this enables the CT primary value
to be changed in 10A steps until the desired ratio is displayed.
Press the t key to store the value and advance the page.
VT SET-UP
The default voltage setting is 400V and this value should not be
altered unless the meter is an HV type and is connected via
voltage transformer(s). In this instance the nominal line to line
voltage of the meter must match the secondary voltage of the
VT(s) and the voltage is programmed to the primary voltage rating
of the VT(s)
PULSE SET-UP
The pulse rate value (PLr) may be set between 0.1 and 100 pulses
per unit. Press the p or q key until the desired pulse is
displayed. Note that the unit of energy (Wh/kWh/MWh) will
automatically change to reflect the primary values of CT & VT
previously set. The pulse value is set for both outputs during the
process. Press the t key to store the value and advance the
page.
The pulse duration value (PLt) may be set in increments between
100mS & 20 seconds as required.
The Pulse Output Test (Pto) allows the meter pulse output and
connected data collection hardware to be tested, regardless of
whether an actual load is present. Press the p button to start the
test. The display will show “Ptr” and both outputs will pulse
simultaneously. This is verified by the front panel l.e.d.s. Press
the p and q together to stop the test and reset the test
counter.
HOURS RUN SET-UP
The hours run preset level may be set between 1% and 100% of
the full scale current. Press the p or q key until the desired
value is displayed. Press the t key to store the value and
advance the page.

RS485 SET-UP
This allows the baud rate and MODBUS address to be set. Use the
p and q buttons to set the desired baud rate. Press the t key
to store the value and advance the page.
Use the p and q buttons to set the unit address. Press the t
key to store the value and save and exit from the set-up menu.
The display will show ‘storing’ to confirm this action.
Connection: 3 Phase 3 or 4 wire Unbalanced, 3 Phase
Balanced, Single Phase Load.
Inputs: Voltage: 400/230V 3 Phase 3/4 wire
Current: 5A – External CTs. Fully isolated.
Burden: <0.1VA per phase Current/Voltage
Pulse Output: Opto isolated volt free contact
Rating: 100mA ac/dc, 100V ac/dc max
Value: 1 pulse per kWh
1 pulse per 10 kWh
1 pulse per 100 kWh
1 pulse per 1000 kWh
Duration: 100ms
Isolation: 2.5kV for 1 minute
Power Supply: 230V 50/60Hz +/- 15%
Overload: Voltage x 4 for 1 hour
Current x 40 for 0.5 seconds max
Consumption: 2VA
Weight: 325g
IP Rating: Instrument = IP20 Front panel = IP40
Temp Range: -10o - +65o
Dims: 106w x 58d x 90h mm (6 DIN)
Accuracy: kWh: Class 1 EN62053-21 7 BS8431 (2%-120%
Nominal Load)
Environment: Operate -10oC > T < 65oC. RH < 75% Non-
Condensing
Storage- 25oC > T < 75oC
IP54 (IP65 with optional kit)
NOTE: Do not expose the instrument display to direct
sunlight.
Unit 5 Southmill Trading Centre, Southmill Road, Bishop’s
Stortford, Herts. CM23 3DY.
01279 503173 [e-mail]
www.elcomponent.co.uk
16.04.15 – Issue 5
5 TECHNICAL CHARACTERISTICS