Keysight SL1200A Series User manual

SL1200A Series
Scienlab Regenerative AC Emulator
Low Voltage & High Voltage as Single & Dual Range
OPERATING INSTRUCTIONS

Content
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Content
Notices ....................................................................................................................................4
Safety and Regulatory Notices...............................................................................................7
User Information ...................................................................................................................13
1System Description........................................................................................................15
Intended use ..................................................................................................................15
Foreseeable misuse .......................................................................................................15
Functional description ...................................................................................................16
Regenerative operation .................................................................................................18
System arrangement .....................................................................................................18
Technical Data ...............................................................................................................20
System data and models ..........................................................................................20
AC Input Rating.........................................................................................................21
AC Output Rating –AC mode...................................................................................22
DC Output Rating - DC mode (optional)..................................................................24
Harmonics (optional) ................................................................................................25
2Transport and Installation..............................................................................................26
Means of transportation ................................................................................................27
Before installation..........................................................................................................27
Transporting and unpacking the system.......................................................................27
Installing the system......................................................................................................29
Disposing of the packaging material.............................................................................29
3Connection and Assembly .............................................................................................30
Electrical installation......................................................................................................31
AC mains considerations ..........................................................................................31
Connecting the mains supply (input) .......................................................................33
Housing ground/functional earth.............................................................................34
Connection of DUT (device under test) (output)...........................................................34
Connection of AC mode............................................................................................34
Connecting load lines ..........................................................................................34
Connecting sense lines ........................................................................................35
Additional DC mode connection (optional)..............................................................35
Connecting load lines ..........................................................................................36
Connecting sense lines ........................................................................................36
Using an emulator adapter with a Scienlab Charging Discovery System ..............36
Connecting an emulator adapter ........................................................................37
Parallel connection ...................................................................................................38

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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Connecting signal and control lines..............................................................................39
Communication interfaces........................................................................................39
Connecting higher-level safety technology .............................................................40
Connecting signal lamp ............................................................................................42
4Commissioning...............................................................................................................43
Procedure for switching on/off......................................................................................44
Performing initial commissioning ..................................................................................45
Recommissioning...........................................................................................................45
5Action in an Emergency.................................................................................................46
Control elements for switch-off.....................................................................................46
Switching off in an emergency ......................................................................................47
6Troubleshooting and Fault Elimination .........................................................................48
Fault message via the PC software ...............................................................................48
System cannot be switched on .....................................................................................48
Test cannot be started...................................................................................................49
System switches off by itself .........................................................................................49
Tripping of the surge protection....................................................................................50
7Upkeep and Inspection..................................................................................................52
General instructions for upkeep ....................................................................................52
Carrying out inspection work....................................................................................53
Cleaning the system .................................................................................................54
8Decommissioning...........................................................................................................55
Temporary decommissioning ........................................................................................55
Storage conditions.........................................................................................................55
Dismantling, final decommissioning .............................................................................55

Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Notices
Copyright Notice
© Keysight Technologies 2020 - 2023
No part of this manual may be reproduced in any form or by any means (in-
cluding electronic storage and retrieval, or translation into a foreign language)
without prior agreement and written consent from Keysight Technologies, Inc.
as governed by United States of America and international copyright laws.
Edition
Edition 3.0, June 2023 (Original Operating Instructions)
Published by
Keysight Technologies Deutschland GmbH
Lise-Meitner-Allee 27
44801 Bochum, Germany
phone [phone]
mail [e-mail]
Technology Licenses
The hardware and / or software described in this document are furnished un-
der a license and may be used or copied only in accordance with the terms of
such license.
U.S. Government Rights
The Software is “commercial computer software,” as defined by Federal Ac-
quisition Regulation (“FAR”) 2.101. Pursuant to FAR 12.212 and 27.405-3 and
Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S. gov-
ernment acquires commercial computer software under the same terms by
which the software is customarily provided to the public. Accordingly,
Keysight provides the Software to U.S. government customers under its
standard commercial license, which is embodied in its End User License
Agreement (EULA), a copy of which can be found at
www.keysight.com/find/sweula. The license set forth in the EULA represents
the exclusive authority by which the U.S. government may use, modify, dis-
tribute, or disclose the Software. The EULA and the license set forth therein,
does not require or permit, among other things, that Keysight: (1) Furnish
technical information related to commercial computer software or commercial
computer software documentation that is not customarily provided to the
public; or (2) Relinquish to, or otherwise provide, the government rights in
excess of these rights customarily provided to the public to use, modify, re-
produce, release, perform, display, or disclose commercial computer software
or commercial computer software documentation. No additional government

Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
requirements beyond those set forth in the EULA shall apply, except to the
extent that those terms, rights, or licenses are explicitly required from all pro-
viders of commercial computer software pursuant to the FAR and the DFARS
and are set forth specifically in writing elsewhere in the EULA. Keysight shall
be under no obligation to update, revise or otherwise modify the Software.
With respect to any technical data as defined by FAR 2.101, pursuant to FAR
12.211 and 27.404.2 and DFARS 227.7102, the U.S. government acquires no
greater than Limited Rights as defined in FAR 27.401 or DFAR 227.7103-5 (c),
as applicable in any technical data.
Warranty
THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED “AS IS,” AND
IS SUBJECT TO BEING CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS.
FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
KEYSIGHT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED,
WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED
HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUEN-
TIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR PERFOR-
MANCE OF THIS DOCUMENT OR OF ANY INFORMATION CONTAINED
HEREIN. SHOULD KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN
AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS
DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY TERMS
IN THE SEPARATE AGREEMENT SHALL CONTROL.

Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Safety Information
A DANGER notice indicates a (extremely) hazardous situation which, if not
avoided, will result in death or serious injury.
Do not proceed beyond a DANGER notice until the indicated conditions are fully
understood and met.
A WARNING notice indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
Do not proceed beyond a WARNING notice until the indicated conditions are fully
understood and met.
A CAUTION notice indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
Do not proceed beyond a CAUTION notice until the indicated conditions are fully
understood and met.
A NOTICE indicates to pay attention to an operating procedure, practice, or the
like that, if not correctly performed or adhered to, could result in damage to the
product or loss of important data.
Do not proceed beyond a NOTICE until the indicated conditions are fully under-
stood and met.
A NOTE refers exclusively to application notes without any security relevance.
CAUTION
WARNING
DANGER
NOTE
NOTICE

Safety and Regulatory Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Safety and Regulatory Notices
Using the system can cause danger and damage for life and limb of the oper-
ators or third parties, to the system itself or to other material assets. In addi-
tion to the manufacturer´s countermeasures, the operator must also take ap-
propriate countermeasures against danger due to residual energy. The per-
sonnel must be briefed about these dangers and the necessary countermeas-
ures during instruction.
The following general safety precautions must be observed during all phases
of operation of this instrument. Failure to comply with these precautions or
with specific warnings or instructions elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument.
Keysight Technologies assume no liability for the customer´s failure to comply
with these requirements. Please read the also Chapter 1 Section Intended
use.
Danger to life in case of misuse at the outputs.
The Scienlab Regenerative AC Emulator does not have its own insulation guard.
If the system emulates an electrical isolation against PE at the output, the local
installation regulations and guidelines must be observed.
This would be in the case of the emulation of an IT network in AC mode, or gen-
erally in DC mode.
Danger to life due to high voltages.
Some components are still supplied with voltage after switching off (wiring color or-
ange).
Before installation and upkeep, turn off and lock out all external voltage supplies.
Only disconnect or establish electrical connections in a voltage-free condition.
For models SL1214A and SL1215A, ensure model is in correct voltage range for
application before enabling system output.
Danger to life due to missing covers!
In case of misapplication, missing protective cover can lead to severe injury, burns or
death in the event of shock and arc flash.
Do not remove cover under load and not operate without cover in place.
After installation and upkeep, the previously removed protective cover must be
replaced.
DANGER
DANGER
DANGER

Safety and Regulatory Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Depending on the set output voltage and current, the system sometimes releases
large amounts of energy at the output.
Touching the connection bars inside the system or the DUT terminals can occur life-
threatening body currents.
Never touch, connect, or disconnect the connecting lines to the DUT during ac-
tive operation.
Danger of arcing.
Residual voltage after switch-off.
In case of connected DUT, the output terminals can still carry voltages even after
switch-off of the system!
Measure the voltage at the outputs to ensure that they are voltage-free.
Danger to life due to charging or discharging batteries.
Batteries are sensitive to overloading/underloading and might explode or start burn-
ing. This can lead to danger for life and limb.
Therefore, a battery must be monitored by a battery management system (BMS).
EMC interferences possible!
The Scienlab Regenerative AC Emulator has an increased interference emission level
according to CISPR 11 at a rated input power of >20 kW. This can result in interfer-
ence with third party sensitive radio services in a distance up to 30 m.
For a rated input power of >20 kW, keep a distance min. 30 m to third party sen-
sitive radio services.
Hearing protection due to noise exposure in the operating area!
Noise level <85 dB(A) at a distance of 1 m from the front
It is recommended to wear hearing protection during operation.
DANGER
NOTICE
DANGER
DANGER
NOTICE

Safety and Regulatory Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Safety and monitoring devices
The system has monitoring devices that switch-off the system in case of
emergency. If additional systems are connected to the SL1200A Scienlab Re-
generative AC Emulator, it is recommended that the systems are integrated
into a higher-level safety device.
Main switch
•On the front side
•I ON: power supply switched on
•O OFF: power supply switched off, communication with the sys-
tem is maintained
•Trip: when emergency stop is triggered → system switches off,
main switch in position Trip
•Note: In the 0 OFF position, the main switch can be locked using
a padlock
Emergency stop push button
•On the front side
•Press: forces local emergency stop of the system
(Responds: see safety relay)
•Turn counterclockwise: unlocks
•Functional test of the emergency stop button: monthly
Key switch Test Release
•On the front side
•Used for enabling/disabling test
•OFF: test release withdrawn (output contactors and power stage
are blocked)
•ON: test release given; test may be started (e.g., acknowledged
by software)
Transformer circuit breaker for 24 V power supply (=EIN-1Q3)
(illustration similar)
•Behind the front panel (detachable)
•Circuit breaker for the circuit of 24 V power supply (logic path)
tapped upstream of the main switch
•O OFF: Circuit breaker has triggered → system is inactive; all
power and communication connections (logic path) are inactive,
switch on via main switch not possible.
•I ON: system can be switched on via main switch

Safety and Regulatory Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Transformer circuit breaker for Measurement & Control Unit (MCU)
(=EIN-1Q2) (illustration similar)
•Behind the front panel (detachable)
•Circuit breaker for the circuit of MCU (logic path) tapped up-
stream of the main switch
Fuses behind the front panel (detachable)
•Fuses for:
•=CV2-1F1: 24 V control voltage
•=CV3-1F1: 12 V Ethernet switch
•=RPS1/3/5-1F1: power stages 1, 3 and 5
•=RPS2/4/6-1F1: power stages 2, 4 and 6 (only for SL1203A,
SL1213A, or SL1215A systems)
Fuse for the circuit between PE and output side neutral point (N’)
•Behind the front panel (detachable)
•=ACO-1F1: Fuse for the circuit between PE and output side neu-
tral point (N’) active in the emulated grounded grid.
•The fuse detects output-side earth faults (see Getting
Started document)
•0 OFF: Fuse has triggered → System is inactive
•I ON: Logic path MSE is active, main switch can be activated
Fuses inside the Output Box on the rear side of the system
•Fuses for:
•=ACO-2F1: AC Sense L1’
•=ACO-2F2: AC Sense L2’
•=ACO-2F3: AC Sense L3’
•=ACO-2F4: AC Sense N’
•=DCO-2F1: DC+ Sense (optional)
•=DCO-2F2: DC- Sense (optional)
Surge protection (=EIN-1F1)
•Inside the Input Box on the rear side
•Responds in the event of overvoltage (e. g. due to lightning)
•Reaction: Feedback signal is detected → undervoltage monitor-
ing reacts → the main switch cannot be activated (falls back to
position Trip)
•Consequence: Surge protection inlets must be changed (see
Chapter 6 Section Tripping of the Surge Protection), feedback
contact is reset

Safety and Regulatory Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Safety relay
•Inside the system
•Responds when the local emergency stop switch or external
emergency stop input via the higher-level safety device are trig-
gered (2-pin each)
•AC supply of the power stages is interrupted, undervoltage mon-
itoring triggers, main switch on “Trip” → system is switched off;
power stage enable is withdrawn; 230 V auxiliary voltage and
24 V control voltage are maintained (logic path)
•Increased Safety function (optional)
When the circuit breaker (1Q3) is switched on (main switch OFF),
the safety relay checks all safety-relevant switching components.
If an error is detected, the system cannot be switched on via the
main switch.
Housing ground/functional earth
•On the rear side of the system
•Connection and coupling of housing ground
•Connection for EMC-compliant design
Display Soft Front Panel power stage
•On the front side
•Display is activated when power stage is active/in operation
•No settings needed
Signal lamp (default setting)
•On the top of the system
•Signals are fixed defined by the measurement and control unit
(MCU)
•Connection via plug
•red: failure signal
yellow: active signal (in operation/output relays closed)
green: standby/ready signal
If the status of the configurable buses is differ-
ent, several lights can be lit simultaneously.
NOTE

Safety and Regulatory Notices
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Safety symbols
Protective earth-ground terminal
Housing ground/Functional earth
Danger, risk of electric shock
Caution, refer to accompanying description
Regulatory markings
The CE mark is a combination of CE, ICES and ISM marks.
This CE mark shows that the product complies with all the relevant Euro-
pean Legal Directives.
ICES-NMB-001 indicates that this ISM device complies with the Canadian
ICES-001.
Cet appareil ISM est conforme à la norme NMB-001 du Canada.
ISM GRP.1 Class A indicates that this is an Industrial Scientific and Medical
Group 1 Class A product.
The UK Conformity Mark is a mark owned by the UK Government. Affixing it
to the product declares that all applicable directives and regulations have
been fully complied with.
This mark, also called the "cTUVus mark", is used to demonstrate compli-
ance with Canadian national standards issued by the Standards Council of
Canada (SCC) and U.S. national standards.
This symbol is a South Korean Class A EMC Declaration. This is a Class A
instrument suitable for professional use and in electromagnetic environ-
ment outside of the home.
This product is marked with the ACMA RCM mark for compliance in Aus-
tralia/New Zealand. A copy of the Manufacturer´s Australia Declaration of
Conformity for this instrument can be obtained by contacting your local
Keysight Technologies Sales Representative.
This symbol indicates the product is recyclable.
The China RoHS mark indicates that toxic substance within the product
stay inside at least 40 years before expiring.
[email protected]
Contact address for questions to conformity of the product.

User Information
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
User Information
This Operating Instructions
describes how to transport, install, connect, commission, operate and up-
keep the system,
provides important notes on safe and efficient handling of the system.
This Operating Instructions is part of the SL1200A Series Scienlab Regenera-
tive AC Emulator and should always be kept at the system´s place of use.
The operating personal must read and understand the Operating Instructions and all
other safety instruction before using this system.
These Operating Instructions must be readily accessible and available operator per-
sonnel.
Applicable documents
The following documents are also part of the system:
Declaration of conformity
Getting Started SL1200A Scienlab Regenerative AC Emulator
Parameter and Message List
Acceptance and calibration report
Action instructions
Steps to be performed by the operating personnel are given as a numbered
list. The order of the steps must be followed. The systems response to the rel-
evant steps are indicated by a check mark.
Example:
1Step 1
2Step 2
✓
System response to the steps.
Steps with no specific order are given as a bulleted list.
Example:
Point 1
Point 2
Links
Cross-references to other parts of this Operating Instructions or hyperlinks to
websites are shown in red.
NOTICE

User Information
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Note for the operator
If the SL1200A is integrated into an overall test bench with other systems, the
operator should carry out a risk assessment.
Without prior connection to a higher-level safety system, misuse can result in life-
threatening injuries.
Keysight recommend first connecting the system to the higher-level safety and
emergency stop system of the test bench, before putting it into operation.
The Keysight emergency stop system in the control cabinet may not be changed
or adapted without the consent of Keysight.
Qualification of the personnel
This section provides an overview of the responsibilities and qualifications of
the operating and service personnel.
Responsibility
Keysight Personnel
Operator personnel
Activity
Transport
X
X
Connection and assembly
X
X
Commissioning
X
--
Operation
X
X
Upkeep
X
X
1
Replacement of system components
X
--
Troubleshooting
X
X
Disposal/recycling
X
X
Table 1: Responsibilities of personnel (X: permitted; --: not permitted)
Only personnel trained in electrical engineering, qualified, and instructed by
Keysight may work on the system.
Contact KeysightCare –Technical Support
Contact KeysightCare
Keysight Technologies Technical Support
www.keysight.com/find/keysightcare-contact
1
Inspection (preventive maintenance)
NOTICE

System Description 1
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
1 System Description
Intended use
The SL1200A Series Scienlab Regenerative AC Emulator is used for testing
the power electronics of charging systems and other components that can be
operated on any power grid, in particular
1-, 2- or 3-phase emulation of AC sources (Voltage Priority)
up to a voltage line-to-line 600 Vrms
SL1201A, SL1202A, SL1203A, SL1214A LV range (low-voltage),
SL1215A LV range (low-voltage), or
up to a voltage line-to-line 1200 Vrms
SL1212A, SL1213A, SL1214A HV range (high-voltage), SL1215A HV
range (high-voltage),
1-, 2- or 3-phase emulation of AC sink (Current Priority),
1-, 2- or 3-phase emulation of harmonics with order 0 to 50, as well as two
interharmonics with freely specified frequency fx of up to 3750 Hz,
optional: emulation of a DC source/sink (Voltage/Current Priority).
The SL1200A can be integrated in a comprehensive test solution for
photovoltaic inverters (PV), battery energy storage inverters, and other
types of grid-connected inverters,
energy storage systems, in conjunction with the Scienlab Charging Discov-
ery System (PHEV, EVSE, OBC).
The Scienlab Regenerative AC Emulator may only be operated in within the
current, voltage and power ranges indicated in Section Technical Data.
The system is built according to the applicable directives, the latest state of
the art, and recognized safety regulations.
The system must only be used in accordance with its intended uses. This is a basic
requirement for trouble-free and reliable operation. The system must be in safe con-
dition before it is commissioned.
Foreseeable misuse
The following in particular shall be deemed to be improper use:
Any other use than that laid down in Section Intended Use and further de-
scribed in the operating instructions without the written consent of the
manufacturer,
Use, installation, operation, maintenance or repair of kind or manner other
than described and by unqualified personnel,
Use of non-approved, inappropriate accessories,
NOTICE

1 System Description
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Non-compliance with safety and operating instructions, occupational safety
and accident prevention regulations or relevant statutory regulations,
Failure to eliminate faults that may impair safety in a timely manner,
Use of spare and accessory parts other than the original,
Operation of the system with incomplete safety devices,
Operation of the system in explosive areas.
Functional description
The SL1200A serves as a regenerative, bi-directional, 3-phase AC
source/sink, with optional DC source/sink. The system can be parameterized
in voltage- or current-controlled mode (Voltage Priority or Current Priority).
Depending on the respective application, the system was given a compact
design with integrated measuring and is available as LV variant (600 V, model
SL1201A, SL1202A, SL1203A, SL1214A (LV range), SL1215A (LV range)) or
HV variant (1200 V, model SL1212A, SL1213A, SL1214A (HV range), SL1215A
(HV range)) variant.
The SL1200A consists of up to six power stages (RPS –regenerative power
system), there are three different types of power stages:
Single range low voltage: 600 V AC, optional 500 V DC,
Single range high voltage: 1200 V AC, optional 1000 V DC, and
Dual range:
low voltage: 600 V AC, optional 500 V DC,
high voltage: 1200V AC, optional 1000 C DC.
The power stages can be parametrized and used individually or together with
each other. Thus, various configurations are possible.
In AC mode, the SL1200A is operated with a sinusoidal AC voltage output and
an adjustable fundamental frequency of 40 to 75 Hz (Voltage Priority). If the
SL1200A is configured in Current Priority mode, the power stage synchronizes
with the voltage measured at the terminals and regulates the specified (posi-
tive or negative) current. To emulate different output grid forms, the output
side neutral point can be set to PE.
The following table shows examples for AC grid emulations
2
.
Grid Form
Description Grid /
Example AC mode
Connection SL12xxA to DUT
PE reference
Neutral Pass Through
Contactor: closed
TN/TT grid
3
2
For 5-wire SL1200A models, neutral pass through contactor passes the ‘N’ phase from the Grid to the output ‘N’
of the SL1200A system instead of the ‘PE’ connection as shown below.
3
TN/TT grid: The generated phases have a potential reference to grounding (PE).
IT grid: The generated phases are electrically isolated from grounding (PE).

System Description 1
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Grid Form
Description Grid /
Example AC mode
Connection SL12xxA to DUT
Without PE reference
Neutral Pass Through
Contactor: opened
IT grid
3
Table 2: Examples for emulated AC grids
Equipped with an optional DC mode, the SL1200A can be operated as a DC
voltage / DC current source. If, for example, a charging station is tested, the
system can be used to emulate the HV battery in the vehicle (Voltage Prior-
ity). If, instead, the vehicle with a battery is tested, the SL1200A can emulate
a DC charging station (Current Priority). If a battery is connected to the
SL1200A, the battery must be monitored by a battery management system
(BMS). The DC outputs are always electrically isolated against ground (PE).
To test the DUT to mains fluctuations, the SL1200A emulates electrical supply
grids with different harmonics and interharmonics. Harmonics can be gener-
ated in Voltage Priority or Current Priority modes. The SL1200A can measure
and control 50 harmonics and additionally control two free frequencies for
interharmonics. The limits are based on the requirements of the standards
EN61000-2-2 and EN61000-4-13 as well as UL2231-2.
The system features two separate current paths, the power path and the logic
path. The main switch disconnects the output stages and the contactor circuit
from the mains via the power path. In the event of an emergency stop, the
main switch switches the output to a safe condition.
Figure 1: Two current paths of SL1200A

1 System Description
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
When the system is switched off via the main switch, some components are
not switched off. All components connected in the logic chain (e. g. measure-
ment and control unit (MCU), switch and safety relay) continue to be supplied
with voltage (lines marked orange). This means that communication between
the system and operating software is maintained even in the event of an
emergency stop. When the logic path is switched off, the power path cannot
be switched on.
Optionally, the system is equipped with an extended safety device (Increased
Safety function, - ST2/SD2 option). Before the system can be switched on via
the main switch, the safety relay checks all safety-relevant switching compo-
nents of the system after the circuit breaker (1Q3) is switched on. The system
can only be switched on via the main switch after a positive check.
Via the customer interface, the system can be configured as either a 1- to 3-
phase AC source/sink or a DC source/sink (DC optional, -SDC option). Chan-
nel switchover between AC and DC operation may only be performed in load-
free state. AC and DC operation use separate terminal blocks (DC terminals
only on -SDC option) (see documentation Getting Started Guide).
Regenerative operation
Regenerative operation is automatic and requires no programming on the
part of the user. Whenever the SL1200A system is sinking current, either by
rapidly downprogramming the output, or by discharging an energy source
such as a battery, the system will direct the excess power back to the AC
mains. You cannot disable the regenerative operation.
During regenerative operation, the power factor of 0.99 is maintained. Sine-
wave current distortion is less than 2% at full load. This ensures the quality of
the AC signal that is returned to the AC mains.
When an AC mains dropout is sensed, galvanic relays disconnect the AC
mains and the unit shuts down. To safeguard your device under test, the
SL1200A system provides “anti-islanding” that senses that the grid is live be-
fore regenerating power back to the grid.
Refer to Chapter 3 Section AC Mains Considerations for additional information
about unit shutdown and restart.
System arrangement
The SL1200A consists of two rack variants with three or six power stages;
both rack variants are available as low-voltage and high-voltage, single or
dual range. The low voltage variants SL1201A, SL1202A, SL1203A (single
range) are designed with an output voltage of up to 600 V, an output current
of up to 125 A, and an output power of up to 90 kVA. The high-voltage vari-
ants SL1212A, SL1213A (single range), however, provide an output voltage of
up to 1,200 V, an output current of up to 65 A, and an output power of up to

System Description 1
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
90 kVA. The dual range voltage variants, SL1214A and SL1215A, can be
switched to provide up to either 600 V at an output current up to 130 A, or
1200 V at an output current up to 65 A.
Communication to both a control computer and the parallel-connected sys-
tems is ensured by Ethernet interfaces.
Internal fans are responsible for cooling the interior of the system. These are
integrated into each individual power stage. Ventilation slots for discharging
the exhaust air are located at the rear of the system.
All essential connections are also located on the rear side of the system, as
shown in the following image.
Depending on the specification and function, following models are available:
STD –Standard Cabinet
SDC –Standard Cabinet with DC power source
ST2 –Standard Cabinet with Increased Safety
SD2 –Standard Cabinet with DC power source and Increased Safety
Figure 2: System arrangement Scienlab Regenerative AC Emulator (left front side, right rear side) (illus-
tration similar)

1 System Description
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Scienlab Regenerative AC Emulator –SL1200A Series –Operating Instructions
Technical Data
System data and models
System data
System designation
Scienlab Regenerative AC Emulator
Model options
SL1200A
series
-STD
Standard Cabinet
-SDC
Standard Cabinet with DC power source
-ST2
Standard Cabinet with Increased Safety
-SD2
Standard Cabinet with DC power source and Increased Safety
Model number
Dimension (H x W x D)
Max. weight
SL1201A
AC power source, 30 kVA, 600 V, 63 A
1360 x 600 x 1050 mm
350 kg
SL1202A
AC power source, 45 kVA, 600 V, 63 A
1360 x 600 x 1050 mm
350 kg
SL1203A
AC power source, 90 kVA, 600 V, 125 A
1760 x 600 x 1050 mm
500 kg
SL1212A
AC power source, 45 kVA, 1200 V, 32.5 A
1360 x 600 x 1050 mm
350 kg
SL1213A
AC power source, 90 kVA, 1200 V, 65 A
1760 x 600 x 1050 mm
500 kg
SL1214A (switchable)
AC power source, 45 kVA, 600 V, 65 A or
AC power source, 45 kVA, 1200 V, 32.5 A
1265 x 605 x 1020 mm
350 kg
SL1215A (switchable)
AC power source, 90 kVA, 600 V, 130 A or
AC power source, 90 kVA, 1200 V, 65 A
1665 x 605 x 1020 mm
500 kg
Number of Units in Parallel
up to 9
Overvoltage category
III
Contamination level
2
Systems heat dissipation
appr. 15% of output max. power
Protection class
IP20; Type 1 Enclosure (UL50E)
Operating conditions
Operating temperature
0°C to +40 °C
Storage temperature
-25 °C to +55 °C
Relative humidity
< 95% (non-condensing)
Noise level
<85 dB(A) at a distance of 1 m from the front
Maximum operating altitude
2.000 m AMSL
Communication interface
To control PC, for parallel con-
nection of various Scienlab Re-
generative AC Emulators
Ethernet LAN