EL-AC
Electronic Load
AC Electronic Loads are power electronics devices that behave as
an AC electrical load. Typical applications are test platforms for
Smartgrids, Load Emulation, AC sources, UPS, AC generators,
Inverters, and electrical devices (as fuses or circuit breakers).
While most electronic loads are dissipative, CINERGIA offers a comprehensive range of DC, AC and AC&DC regenerative electronic
loads producing significant energy savings, optimizing the electrical
and cooling installation and reducing test costs.
FUNCTIONAL DESCRIPTION
KEY FEATURES
Operation modes:
-Constant Current (CC)
-Constant Power (CP)
7.5 kVA – 200 kVA
-Constant Impedance (CI)
-Automatic test from Excel file
Three AC channels:
-Independent control of each channel, as three single-phase
loads
-Parallel control of the three channels, as one single-phase
load with 3 times the current rating
-Independent control of each channel, as a star three-phase
load balanced or unbalanced
80% typical energy saving by regenerating to the grid:
11.1 kW
19.1kW
11 1 .1kW
Electronic Load
η=90%
Equipment
100 kW
AC
8 kW
DC
η = 92 %
Under Test
GRID
(EUT )
92 kW
DC
AC
92 kW
4 Quadrant Power Supply
Regenerative up to 100%
rated power
Full 4Q: pure capacitive and
inductive current
Independent configuration
per channel:
- Fundamental current up to
400Hz
- Harmonics up to 780Hz
- Phase angle
Working (EUT) voltage:
0-480 Vrms, l-l (with neutral)
0-277 Vrms, l-n
10-400Hz
AC&DC version available
ELAC_2015_v1
CINERGIA
Pere IV 29-35, 5è 1ª
08018 BARCELONA
www.cinergia.coop
cinergia@cinergia.coop
T. +34 934 864 358
Caltest Instruments GmbH
Kohlmattstrasse 7 Tel: +49(0)7842-99722-00
D-77876 KAPPELRODECK Fax: +49(0)7842-99722-29
info@caltest.de www.caltest.de
EL-AC
Electronic Load
CONCEPTUAL SCHEMATIC
Electronic Load
AC
DC
GRID
DC
AC
EQUIPMENT
UNDER TEST
(EUT)
Optional
BACK-TO-BACK TOPOLOGY
The converter is formed by a grid-side Active Rectifier and an output Inverter sharing a DC-link. The Active
Rectifier allows sinusoidal current consumption with low harmonic distortion and unity power factor. The
Inverter generates three independent AC currents controlling the amplitude, phase angle and harmonic
content by using a digital resonant control algorithm.
TECHNICAL DIAGRAM OF EL-AC
AC IN (GRID side)
AC OUT (EUT side)
3P+ N
3P+ N
EMC
filter
-
-
EMC
filter
Current
sensor x 3
Voltage
sensor x 3
Drivers x
DSP
6
Voltage
sensor x 2
CAN
control
Drivers x
DSP
control
6
Current
sensor x 3
Voltage
sensor x 3
HMI
ELAC_2015_v1
MODBUS/TCP
ETHERNET
AC Input is connected to the grid (neutral connection or isolation transformer is required)
AC Output is connected to the Equipment Under Test (EUT) and can be used as:
- Three-phase star load (balanced or unbalanced)
- Three independent single-phase loads
- One single-phase load (3 times rated current)
www.cinergia.coop
EL-AC
Electronic Load
FUNCTIONALITIES
Resistive load
Pure capacitive load
Pure inductive load
Harmonics
Single-phase rectifier
Three-phase rectifier
Phase delay
Phase delay + harmonics
Independent phase control
ELAC_2015_v1
In previous oscilloscope captures: AC source under test (yellow), EL currents phase A, B and C (green, magenta, blue)
www.cinergia.coop
EL-AC
Electronic Load
USER INTERFACE
SOFTWARE FEATURES
Local 3.2” Touchscreen panel
Windows 7 user interface for remote operation and
data acquisition.
Local control port:
-1 analog input 0-10V
-3 analog outputs 0-10V
-4 digital inputs
-3 relay outputs
-1 Emergency stop
Note: all inputs/outputs are isolated
Communications port:
LAN Ethernet with Modbus/TCP protocol.
Optional communications:
RS485, RS232, CAN, LabView
Configuration of harmonics
Cooling
The power supply is air-cooled internally.
ELAC_2015_v1
Mechanical housing
The power supplies are housed in compact cabinets
with wheels up to 120kVA for easier transportation.
Options
Galvanic Isolation
Isolation monitor
Isolated analog inputs
RS485, RS232, CAN
Labview drivers
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Configuration of disturbances
EL-AC
Electronic Load
RANGE AND SPECIFICATIONS
MAGNITUDE
VALUE
Power
Input side (GRID side)
AC Voltage
Voltage range
AC Current
Frequency
THDi
Power Factor
7.5kVA-200kVA
Efficiency
Overload
Output side (EUT side)
AC Voltage
AC Current
(at rated power)
(at rated power)
Typical at rated power
Configurable by user
(at rated power)
Rated maximum, ch-neutral
Frequency
Power factor
Harmonic
3ch mode, per channel
1ch mode
Fundamental current
Configurable by user
Configurable by user
Harmonic content
Maximum %
Crest factor
Modes of operation
Constant Current
Constant Power
Constant Impedance (R,L,C)
General
Measurements
User interface
ELAC_2015_v1
Rated
Range
0-±100%
0-±100%
min.-100%
0-277Vrms (10-100Hz)
0-210Vrms (101-200Hz)
0-150Vrms (201-400Hz)
10-230Arms
30-690Arms
10-400Hz
0-1 (capacitive/inductive)
1st - 15th at 50Hz (except 10,12 & 14)
1st - 13th at 60Hz (except 10&12)
1st at 400Hz
1st - 9th: 100%
11th: 50%, 13th-15th:10%
<3
Resolution
Ripple
<±0.1%†
<1%
<±0.1%
<1%
<±0.1%
<1%
Input Voltage (Vrms) and Current (Irms)
Input and Output Power
Output Voltage (Vrms) and Current (Irms)
Temperatures
3.2” Touchscreen
Local Control port: 1 analog input, 3 analog outputs, 4 inputs, 3 relays
Communication Port: Ethernet (Optionals: RS485, RS232, CAN)
Communication Protocol: Modbus/TCP
10-90% (Absolute maximum, without condensation)
5-35 ºC (Absolute maximum)
Forced air
Over Current, Over Voltage, Shortcircuit, Overtemperature
Humidity
Temperature
Cooling
Protections
Standards
CE Marking
Safety
EN-62040-1-2, EN-60950-1
EMC
EMC: EN-62040-2
† FS of current measurements is 3 times the rated curent (crest factor)
All specifications are subject to change without notice.
www.cinergia.coop
3x400Vrms+Neutral+Earth
+15% / -20 %
10-290Arms
48-62Hz
<3%
≥0.99
0-1 (capacitive/inductive)
>92%
125% for 10 min / 150% for 60 s
EL-AC
Electronic Load
EL-AC MODELS
REFERENCE
RATED
kVA
kW
EL7.5-AC
EL10-AC
EL15-AC
EL20-AC
EL30-AC
EL40-AC
EL50-AC
EL60-AC
EL80-AC
EL100-AC
EL120-AC
EL160-AC
EL200-AC
7.5
10
15
20
30
40
50
60
80
100
120
160
200
6.75
9
13.5
18
27
36
45
54
72
90
108
128
160
RATED CURRENT
AC rms / phase AC rms
3ch mode
1ch mode
10A
30A
15A
45A
20A
60A
25A
75A
40A
120A
50A
150A
65A
195A
80A
240A
105A
315A
130A
390A
465A
155A
555A
185A
690A
230A
WEIGHT
kg
DIMENSIONS
DxWxH (mm)
100
100
102
105
150
175
185
185
265
290
290
540
550
770x450x1100
All specifications are subject to change without notice.
GALVANIC ISOLATION (optional)
REFERENCE
RECOMMENDED
CIRCUIT BREAKER
WEIGHT
kg
DIMENSIONS
DxWxH (mm)
IT7.5
IT10
IT15
IT20
IT30
IT40
IT50
IT60
IT80
IT100
IT120
IT160
IT200
Type D - 25A
Type D - 32A
Type D - 50A
Type D - 63A
Type D - 80A
Type D - 100A
Type D - 125A
Type D - 160A
Type D - 200A
Type D - 250A
Type D - 315A
Type D - 400A
Type D - 500A
67
94
125
145
174
217
280
381
435
458
514
612
753
Inside the
cabinet
595x415x708 (*)
789x490x865 (*)
964x684x1252 (*)
1192x744x1430 (*)
(*) The transformer is delivered in a stand-alone cabinet IP23
ELAC_2015_v1
All specifications are subject to change without notice.
Caltest Instruments GmbH
www.cinergia.coop
Kohlmattstrasse 7 Tel: +49(0)7842-99722-00
D-77876 KAPPELRODECK Fax: +49(0)7842-99722-29
info@caltest.de www.caltest.de
880x590x1320
850x900x2000