Delta Elektronika EST 150 User manual

1 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
DELTA ELEKTRONIKA B.V. Vissersdijk 4, 4301 ND www.DeltaPowerSupplies.com
DC POWER SUPPLIES Zierikzee, the Netherlands Tel. [phone]
EST150
PRODUCT MANUAL
Contents:
1 –Safety Instructions
2 –General
3 –Operating
4 –Maintenance & Trouble Shooting
5 –EU Declaration
6 –UK Declaration
Product Manuals
For several Applications there are Application Notes available on our website.
See PRODUCTS\EST150\DOWNLOADS.

SAFETY INSTRUCTIONS EST150
2 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
Warning! When the 'plus' DC power terminal can exceed 60VDC in respect to the 'minus' DC power terminal,
additional external measures must be taken to ensure safety isolation of the DC power terminals and sense
connections.
Warning! When the 'minus' DC power terminal of the unit can exceed 60VDC / 42.4Vpk in respect to ground,
additional external measures must be taken to ensure safety isolation of the following:
- DC power terminals and sense connections.
- programming/monitor/status-signals.
- interfaces with operation isolation.
- non-isolated interfaces.
1
SAFETY INSTRUCTIONS - EST150-series
1.1
Caution
The following safety precautions must be observed during all phases of operation, service and repair of this equipment.
Failure to comply with the safety precautions or warnings in this document violates safety standards of design,
manufacture and intended use of this equipment and may impair the built-in protections. Delta Elektronika shall not be
liable for user’s failure to comply with these requirements.
1.2
Installation Category
The Delta Elektronika power supplies have been evaluated to installation category II (Over voltage category II).
1.3
Grounding of Mains Terminals (AC Power Terminals)
This product is a safety Class 1 unit. To minimize shock hazard, the unit must be connected to the AC Power Supply
mains through a three conductor power cable, with the ground wire firmly connected to an electrical ground (safety
ground) at the power outlet.
For units designed to be hard-wired to the mains supply, the protective earth terminal must be connected to the safety
electrical ground before another connection is made. Any interruption of the protective ground conductor, or
disconnection of the protective earth terminal will cause a potential shock hazard that might cause personal injury.
1.4
Grounding of DC Power Terminals
If the DC power terminal of a unit is specified to sink or source to a maximum of 60VDC, and either the 'minus' or 'plus'
DC power terminal is grounded, the voltage on the following connections can be considered safe:
- DC power terminals and sense connections.
- programming/monitor/status-signals
- all Delta Elektronika interfaces.
Caution 1: If a low voltage unit has both DC power terminals floating, or if the DC terminals are in series with an external
high AC or DC voltage, the 'minus' DC power terminal can exceed the safe value in respect to ground as specified in the
above warning!
Caution 2: Although a high voltage unit is set to a safe voltage below 60VDC, for safety it must always be considered as
a high voltage unit! Wrong operation, a programming error or an external defect can result in an unsafe high DC output
voltage.
Caution 3: when programming a high voltage unit directly via a PC or a network connection, either ground the 'minus'
DC power terminal or use a safety isolated interface!
For more information regards Grounding & Safety, see the online application note "Safe operation of a power supply".
1.5
Fuses
Fuses to be changed by authorized Delta Elektronika service personnel only, for continued protection against risk of fire.
1.6
AC Input Ratings
Do not use an AC Supply which exceeds the AC input voltage and frequency rating of this unit. The AC input voltage and
frequency rating of the Delta Elektronika power supply series are stated in the accompanying datasheet.
1.7
Live Circuits
Operating personnel should not remove the unit covers. No internal adjustment or component replacement is allowed by
non Delta Elektronika qualified personnel. Never replace components with the power cable connected. To avoid injuries,
always disconnect power, remove external voltage sources and discharge circuits before touching components.
1.8
Parts Substitutions & Modifications
Parts substitutions and modifications are allowed by authorized Delta Elektronika service personnel only. For repairs the
unit must be returned to a Delta Elektronika service facility.
1.9
Removal of (safety) covers
Safety cover(s) are used to cover potentially hazardous voltages.
Observe the following when removing safety cover(s):
Switch off the unit and disconnect the unit from the AC mains supply and from the DC power application.
Wait for 5 minutes to allow internal capacitors to discharge, then unscrew and remove the cover(s).
Always place the cover(s) back before connecting the unit to the mains supply again.

SAFETY INSTRUCTIONS EST150
3 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
This marking shown on the product, its packing or its literature indicates that it should not be disposed with other
wastes at the end of its working life, but should be collected separately to recycle it responsibly to promote the
sustainable reuse of material resources.
WEEE (Waste Electrical & Electronic Equipment)
1.15
Correct Disposal of this Product
Applicable in the European Union.
1.10
Handling and mounting
Warning! Risk of cutting: unit has sharp edges and corners!
Warning! No wall mounting or ceiling mounting allowed! Risk of crushing under unit.
Only mount unit horizontally, place on a stable surface or use rack mounting.
1.11
Cooling, thermal burn
Proper air flow is required for cooling of the unit. This enables operation at full power and a longer life time.
If the unit gets over heated, the power will shut down until unit has cooled down again.
Warning! Top cover and can get hot. Avoid touching this while operating the unit at high power!
Warning! Do not block cooling openings. Do not try to enter openings by any object.
Warning! Do not (dis)connect cables to the DC power terminals while the unit is on. Sudden making or breaking of
high DC currents can cause large sparks, even at low voltages. Risk of thermal burn and fire!
1.12
Electro medical devices
Warning! High currents can run through the DC power terminals. These currents cause strong magnetic fields. Do
not come near if you have an electro medical device such as a pacemaker.
1.13
Environmental Conditions
The Delta Elektronika power supplies safety approval applies to the following operating conditions:
Usage : Indoor use only.
Warning! Not intended to be used in the presence of children or animals!
Ambient temperature : -20 to 50 °C.
Maximum relative humidity : 95%, non condensing, up to 40 °C, 75%, non condensing, up to 50 °C.
Altitude : Do not use above 2000 m sea level.
Warning! Electrical Creepage & Clearance not valid for higher altitudes!
Pollution degree : 2
1.14
Symbols & markings
Caution risk of electrical Shock.
Instruction manual symbol. The instrument will be marked with this symbol when it is
necessary fort he user to refer to the instruction manual.
Protective ground conductor terminal.
Off (supply).
On (supply).

GENERAL EST150
4 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
2
GENERAL
2.1
OUTPUT

The outputs of the EST150 can either be used as a constant
voltage source with current limiting or as a constant current
source with voltage limiting.

The change of mode occurs sharply at the crossing of the
voltage and current settings. Fig. 2 - 1 shows the output
ranges.
2.2
OVERLOAD PROTECTION

The power supply is fully protected against all overload
conditions, including short circuit.
2.3
INPUT VOLTAGE

The power supplies have a wide input voltage range.
2.4
INPUT CURRENT

The units have active power factor correction (PFC). The
input current will therefore be almost a sine wave. This
means the rms-value and the harmonic distortion of the input
current will be relatively low.
2.5
EFFICIENCY

The efficiency is very high and constant over a wide output
current range. High efficiency also means low power loss and
low heat generation.
2.6
CV REGULATION

The CV-load regulation should be measured directly on the
output terminals (see fig. 2 - 2). A few cm of cable can have a
voltage drop of several mV (at high current !).
2.7
RIPPLE & NOISE

The output ripple is very low with almost no spikes. The ripple
voltage has to be measured directly on the output terminals
using a probe with very short connections (to avoid pick up of
magnetic fields) (see fig. 2 - 3).

Note: to get reliable results, the background noise level
should be lower than the output ripple.
2.8
TRACKING MODE

When the unit operates in Tracking Mode, the CV
potentiometer for the output 1 sets the voltage for both output
1 and 2.

In this mode a Dual Voltage Supply with an equal negative
and positive voltage can be created (see fig 2 - 4).

Both outputs can also be connected in series or parallel to
create a unit with twice the output voltage or current.

Both CC potentiometers have to be set separately.
2.9
PULSATING LOAD

To avoid overheating of the output capacitors, the AC
component of the load current should be limited (see fig. 2 -
5).

One method of decreasing the AC current through the output
capacitor is by using a large external electrolytic capacitor in
parallel with the load.

Care must be taken the capacitor in combination with the
lead inductance will not form a series resonant circuit!
2.10
INSULATION

For safety reasons the insulation of the separating
components (transformers) between input and output is
tested at 3750 Vrms for 1 minute. This is tested before
assembly.

Warning! Afterwards the 3750 Vrms cannot be tested on the
assembled unit because the insulation between the
components on the input side and the case (like the bridge
rectifier) is specified at 2500 Vrms. Since the insulation
between output and case is low (only 600 V DC), the

GENERAL EST150
5 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
insulation between the primary components and case will
break down when 3750 Vrms is applied between input and
output (2500 Vrms + 600 V DC < 3750 Vrms). See also fig. 2
- 6).

Note: when testing the insulation, take care to slowly (e.g. in
one second) charge and discharge the capacitors between
input - case and output - case. This to prevent high peak
currents, which could destroy the power supply. Make sure to
discharge the capacitors completely before using the unit
again.
2.11
RFI SUPPRESSION

Both the input and output have RFI filters, resulting in very
low conducted RFI to the line and load. Due to the output filter
the output voltage is very clean, having almost no spikes.

The combination of RFI filters and the closed metal case
results in a low radiated RFI.
2.12
OPERATING TEMP

At full power the operating temperature range is –20 to
+50 °C.

From 50 to 60 °C the output current has to be derated linearly
to 75 % at 60 °C (see fig. 2 - 7). These temperatures hold for
normal use.
2.13
THERMAL PROTECTION

A thermal switch shuts down the output in case of insufficient
cooling. After cooling down, the unit will start working again.
2.14
HOLD - UP TIME

The hold - up time depends on the load, output voltage and
line input voltage. A smaller load or a lower output voltage
results in a longer hold - up time (see fig. 2 - 8). The influence
of the line input voltage is limited because of the active PFC.
2.15
TURN ON DELAY

The output voltage is available 0.25 sec after mains switch
on.
2.16
INRUSH CURRENT

The inrush current is limited with a 30 Ohm NTC to about 10
A when the NTC is cold.
2.17
COOLING

The cooling is by natural convection, no noisy blowers are
present. The unit should have sufficient free space. A
distance of minimum 5 cm around the unit is recommended.

For long life the temperature of the air surrounding the unit,
should be below 35 °C under normal conditions.

Under extreme conditions it should be below 50 °C.
2.18
SERIES OPERATION

Series operation is allowed up to 600 V total voltage. The
power supplies can be connected in series without special
precautions.

Note: when two or more outputs are connected in series, the
maximum current is limited by the highest CC potmeter
setting.
2.19
PARALLEL OPERATION

Parallel operation of the units has no limitations. The power
supplies can be connected in parallel without special
precautions.

OPERATING MANUAL EST150
6 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
3
OPERATING
3.1
OPERATING THE UNIT FOR THE FIRST TIME

Check there is no condensation on the unit. If there is, allow
some time to dry.

For all three outputs set the CV and CC potentiometers to
minimum (fully anticlockwise).

Switch on the unit.

For the output 1 push the "OUTPUT ON/OFF" button to turn it
on.

Turn both the CV and CC potentiometer a few turns clock
wise.

A voltage should be present on this output.

By pressing the "DISPLAY SETTINGS" button, the meters will
show the setting of the CV and CC potentiometer for this
output.

Repeat above step for the other two outputs.

Check the cooling on the backside of the unit is not
obstructed.

Now the unit is ready for operation. All three outputs are
independent and floating (see fig. 3 - 1)

Each output can be used as a Voltage Source (unit in CV-
mode) or as a Current Source (unit in CC-mode).
3.2
TRACKING MODE

Push the "TRACKING ON/OFF" button. Both output 1 and 2
will turn off and the LED for Tracking Mode will light.

Turn CV potentiometer for output 1 to minimum (fully
anticlockwise).

This potentiometer controls both output 1 and 2 in the
Tracking Mode.

The CV potentiometer for output 2 is disabled in this mode.

Turn both CC potentiometers to minimum. Both the CC
potentio-meters have to be set separately.

Push the "OUTPUT ON/OFF" button for output 1 to turn both
output 1 and output 2 on.

Turn the CV potentiometer for output 1 and both CC
potentiometers a few turns clock wise. An equal voltage
should be present on output 1 and output 2.

By pressing the "DISPLAY SETTINGS" button 1, the meters
will show the setting of CV potentiometer 1 and CC
potentiometer 1.

By pressing the "DISPLAY SETTINGS" button 2, the meters
will show the setting of CV potentiometer 1 and CC
potentiometer 2.

Both outputs can be used as a Dual Voltage Supply by
connecting the plus of output 1 to the minus of output 2 (see
fig. 3 - 2).

In this configuration the outputs operate as a unit with an
equal negative and positive output of -20 V / 2.5 A and +20 V
/ 2.5 A.

Both outputs can also be connected in series to operate as
one unit with a range of 40 V / 2.5 A (see fig. 3 - 3).

Note that in this configuration the current is limited by the
highest CC potmeter setting.

In parallel operation the outputs operate as one unit with a
range of 20 V / 5.0 A (see fig. 3 - 4).

The settings of output 3 are not influenced by the Tracking
Mode.

To return to the normal mode, push the "TRACKING
ON/OFF" button again. Both output 1 and output 2 will turn
off. After pushing both the "OUTPUT ON/OFF" buttons again,
output 1 and output 2 can be set independent again.
3.3
OPERATING AND STORAGE CONDITIONS
3.3.1 TEMPERATURE

The operating temperature range at full load is -20 to +50 °C.

Note: a lower temperature extends the life of the power
supply.

The storage temperature range is -40 to +85 °C.

MAINTENANCE & TROUBLE SHOOTING EST150
7 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
4
MAINTENANCE & TROUBLE
SHOOTING
4.1
GENERAL

The ES-series power supplies normally need no maintenance
or calibration. Only care must be taken that the cooling of the
unit is not obstructed.
4.2
NO OUTPUT (normal operation)

Remove load from output.

Check position of prog. switches at the rear panel, they
should be on MANUAL.

Switch on unit.

Turn all the CV and CC potentiometers a few turns clock-
wise. A voltage should be present on the output.
4.3
NO LEDS on.

Overheating can be the cause, cooling down will reset the
thermal protection.

Check input power.

Check fuses inside unit.
4.4
NO equal voltages in Tracking Mode

One or both of the tracking outputs are in CC mode (CC LED
on).

Turn the CC potentiometers fully clockwise.

Reduce the load.
3.3.2 HUMIDITY

During normal operation humidity will not harm the power
supply, provided the air is not aggressive. The heat normally
produced in the power supply will keep it dry.

Condensation. Avoid condensation inside the power supply,
break-down could be the result. Condensation can occur
during a period the power supply is switched off (or operating
at no load) and the ambient temperature is increasing .

Always allow the power supply to dry before switching it on
again.
3.3.3 GALVANIC INDUSTRY

For using the power supplies in the galvanic industry it is
strongly recommended to take precautions against an
aggressive environment.

An aggressive environment with acid, salt, etc. can harm the
electronic components. Sometimes even the copper traces of
the pc-boards dissolve.

To avoid problems the power supplies should be mounted in
a relative clean room, or mounted in a cabinet receiving clean
air with over pressure. Or a cabinet with a heat exchanger.

EU DECLARATION EST150
8 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
We Delta Elektronika
Vissersdijk 4
4301 ND ZIERIKZEE
The Netherlands
Declare under sole responsibility that the following Power Supply:
EST 150
Meet the intent of Directives
2014/30/EU Electromagnetic Compatibility (EMC)
2014/35/EU Low Voltage Directive (LVD)
2011/65/EU Reduction of Hazardous Substances (RoHS2)
Compliance was demonstrated to the following specification as listed in the official Journal of the European
Communities:
EN 61000-6-3:2007 Generic Emissions (residential, light industrial)
+A1:2011
EN 61000-3-2:2014 Power Harmonics
EN 61000-3-3:2013 Voltage fluctuation and flicker
EN 61000-6-1:2007 Generic Immunity (residential, light industrial)
EN 61000-6-2:2005 Generic Immunity (industrial environment)
EN 61010-1:2010 Safety of electrical equipment for measurement, control and laboratory use
EN 63000:2018 Assessment of electrical and electronic products with respect to RoHS
J. Koopman
Managing director,
Zierikzee, January 2021
DELTA ELEKTRONIKA B.V. Vissersdijk 4, 4301 ND www.DeltaPowerSupplies.com
DC POWER SUPPLIES Zierikzee, the Netherlands Tel. [phone]
5
EU Declaration of Conformity - EST150-series

UK DECLARATION EST150
9 / 9 DELTA ELEKTRONIKA B.V. rev. Jan. 2021
6
EU Declaration of Conformity - EST150-series
DELTA ELEKTRONIKA B.V. Vissersdijk 4, 4301 ND www.DeltaPowerSupplies.com
DC POWER SUPPLIES Zierikzee, the Netherlands Tel. [phone]
Product: EST150 Power Supply Series
Model Numbers: EST150.
Manufacturer:
Name: Delta Elektronika B.V.
Address: Vissersdijk 4, 4301 ND Zierikzee, The Netherlands
This declaration is issued under sole responsibility of the manufacturer
Product Description: Regulated DC Power supply
Specification: 150W DC power supply 10 to 20 Volts
The object of the declaration described is in conformity with the relevant UK Statutory Instruments (and their
amendments):
2016 No. 1091 Electromagnetic Compatibility Regulations 2016
2016 No. 1101 Electrical Equipment (Safety) Regulations 2016
2012 No. 3032 Restriction of the Use of Certain hazardous Substances in
Electrical and Electronic Equipment Regulations 2012
Standard Title
BS EN 61000-6-3:2007 +A1:2011 Electromagnetic compatibility (EMC). Generic standards. Emission standard for
residential, commercial and light-industrial environments.
BS EN 61000-6-2:2005 Electromagnetic compatibility (EMC). Generic standards. Immunity standard for
industrial environments.
BS EN 61000-6-1:2007 Electromagnetic compatibility (EMC). Generic standards. Immunity standard for
residential, commercial and light-industrial environments.
BS EN 61000-3-2:2014 Electromagnetic compatibility (EMC). Limits. Limits for harmonic currents
produced by equipment connected to public low-voltage systems with input
current <= 16 A per phase.
BS EN 61000-3-3:2013 Electromagnetic compatibility (EMC). Limits. Limitation of voltage changes,
voltage fluctuations and flicker in public low-voltage supply systems. Equipment
with rated current ≤ 16 A per phase.
BS EN 61000-4-2:2009 Electromagnetic compatibility (EMC). Part 4-2: Testing and measurement techniques -
Electrostatic discharge immunity test.
BS EN 61010-1:2010 Safety requirements for electrical equipment for measurement, control, and
laboratory use. General requirements.
BS EN IEC 63000:2018 Technical documentation for the assessment of electrical and electronic products with
respect to the restriction of hazardous substances.
Signed for and on behalf of: Delta Elektronika B.V.
Place of issue: Zierikzee, Netherlands
Date of issue: 8th of January 2021
Name: J. Koopman
Position: Managing director
Signature: