With the accumulated and nurtured knowledge of high voltage Matsusada

Precision Inc, the leading manufacturer of high-voltage power supplies,

presents basic instructions on how to use the high-voltage power supplies.

How to usehigh-voltage power supply

How to usehigh-voltage power supply

UsefulBooklet

HOW-TO

High VoltagePower Supplies

for

Various discharge phenomena can occur to even normal insulators as applied voltage increases. When handling high voltage, it is necessary to enhance insulating strength by taking various meas-ures to prevent electric discharge. Typical insulators and their characteristics are shown below. It is common to fill likely-to-be-high-potential areas with these insulators to prevent electric discharge.

01

In order to avoid electric discharge

Currently usable insulation oil items are shown below. Mineral oil will be used in consideration of costs unless special requests such as flame-retardancy are specified.

Insulation oil

S F 6 g a sDielectric strength of the gas is high and scientifically stable when the gas temperature is until up to around 1800K. There are many factors affecting dielectric breakdown voltage. The following 7 fac-tors are basic ones.

Mineral Oil

Remarks

CharacteristicsNames

Flash point

Kinetic viscosity(40°C)

Density(15°C)

Specific inductive capacity

tanδ(60Hz,80°C)

Electric resistivity (80°C)

Breakdown Voltage

[°C]

[mm2/s]

[g/cm3]

[%]

[Ω·cm]

[kV/2.5mm]

134

8.5

0.879

2.18

< 0.01

3 × 1015

75

AlkylNaphthalene

For transformerand capacitor For capacitor For capacitor

150

7.5

0.957

2.47

< 0.01

1 × 1016

80

AlKyldiphenyl ethane Silicon Oil

150

6.3

0.988

2.50

< 0.01

1 × 1016

80

300

39

0.960

2.52

< 0.01

1 × 1016

80

Alkylbenzene

132

8.6

0.868

2.18

< 0.01

1 × 1016

78

Properties of various kinds of insulation oil

Voltage polarity

Voltage Waveform

Electrode area

Whether ultraviolet rays are irradiated or not

Existence of dielectric solid

Mixing of metallic foreign substances

Time length of voltage application

For in-vehicle transformer Water absorbable

For cable useWith high resolvability

02

Handling of High-Voltage Output CableThere are various ways of connections for high voltage application. Shown here are one example and precautions in handling high-voltage output cable.

In order to avoid electric discharge to the human body, cover high-voltage producing devices with insulators having enough dielectric strength, or cover them with those having the same potential as the ground so that discharge may not occur in other places.

It is difficult to apply the above process only for the connection area when extending the high voltage cable by the method of connecting 2 cables. In such a case cover the connection area with a heat shrinkable tube with dielectric strength and shrink it. At that time, there is a possi-ble danger that the tube insulation may be destroyed if the withstand voltage of the tube is not enough. Secure the withstand voltage by increasing the number of tubes to double or triple when single tube does not provide enough withstand voltage. Smooth the soldered area to finish it as the soldered area with "pointed" edges can cause de-struction of withstand voltage even if the withstand voltage of the tube is enough.

Secure the cable in a mechanically method so that any force exerted on the cable may not concentrate on the soldered area.

Something that high voltagewill be applied to.

An insulated conductor or a ground potential conductor

Output cable

An insulator

Finish soldering so that no "pointed" edges is found.

Smooth the soldered area to finish it so that no "pointed" edges can be seen.

In the case of a conductor, establish a ground for it.

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old

erin

g d

irec

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Wh

en c

on

nec

tin

g h

igh

-vo

ltag

e ca

ble

s

Current values

1mA

5mA

10mA

20mA

50mA

100mA

Inf luence emerging to the human body

Electric ShockElectric shock is also called "Electrical Stunning" and means that electric current passes through part of the human body. The severity of electric shock depends on the voltage and the path over which the current flows.If electric shock is mild, you will just feel tingling sensation, but severe one can cause a burn, respira-tory depression, heart damage, and death at the worst.

The resistance of human skin is around 5kΩ when it is dry and the voltage is 100V. It is around 2kΩ when it is wet. The body resistance is around 300Ω. If coming in contact with the voltage of 100V when the skin is wet, 22mA of current will flow through the human body and you cannot let go of it on your own. That is why you should avoid working with wet hands.

When only feeble current flows, the danger will be minimized because these figures are very con-ceptual ones; their capacity of power supply is extremely small; and the circuit impedance (a kind of resistance) is high.

These figures are very conceptual ones. So when only feeble current flows due that the capacity of power supply is extremely small or the circuit impedance ( a kind of resistance ) is high, the danger will be minimized

The higher the voltage becomes, the more likely it becomes to suffer an electric shock as air insula-tion is destructed and electric discharge occurs even if electrode is not touched directly.It is necessary to keep the safety distances from the charged areas according to the table below and to try not to get closer to these areas.

Voltages of the charged areas [kV]

Safety distances [inch]

3

6

6

6

10

8

20

12

30

18

60

30

100

46

140

63

270

119

Tingling sensation

Considerable pain

Unbearable suffering

Muscle contraction is so severe that you cannot let go of the circuit on your own.

Considerable danger

A fatal result

03

Safety Precautions and WarningsWhen handling high voltage, please observe the safety precautions and warnings, or an electric shock may occur, even leading to a death. Be sure to the following safety precautions.

Make absolutely certain that ground terminal of the high-voltage power supply is connected to the earth ground.

Be sure to establish a ground.1

In order to avoid an electric shock, never touch any high voltage outputs or high voltage terminals during operation. During normal operations or test operation, extremely high voltage is applied to the terminals and death from electricity may be caused if they are touched.

Do not touch the high voltage areas. 2

When the voltage becomes 300V or higher, there is a danger of electric shock caused by electric discharge without direct contact with the electrode. Cover the high voltage areas such as electro-des with insulators that can adequately withstand high voltage or conductive materials at the ground potential to prevent direct contact with them.

Do not expose the high voltage areas. 3

Do not touch the high voltage power supply when there is not anyone who is familiar with the oper-ation and the danger of high power voltage supply and can give first aid for fear of an electric shock. When having someone operate the high voltage power supply, warn him or her of which areas are dangerous to touch beforehand to let him or her fully understand the danger.

Please understand the danger.4

Cover with insulators

Earth ground

Do not expose the high voltage area.

04

05

When operating the high voltage power supply, let go of the device and operate the power supply with the right hand in order to reduce the risk that current passes through the important organs in the human body.

Operate the high voltage power supply with your right hand.5

Be sure to turn off the power supply before touching the high voltage areas. And Confirm that it is turned off.As there are condensers at the output parts and it is very dangerous to touch the parts just after turn-ing off the power. Connect all of them to earth ground to discharge them while paying attention to electrical charge of these condensers.

Be sure to turn off the power before touching the high voltage areas.6

The energy charged in the output shielded cable will be discharged when they are grounded. How-ever, the incomplete discharge or charge recovery may take place after removing the grounding. When touching the output cable, be sure to remove charge completely.

Be careful with the electrical charge on the cable.7

When touching inside the power supply according to the instruction manual of the high voltage power supply, be sure to turn off the power supply and remove the input cable. Connect all the con-densers and points where high voltage has been generated to earth ground. Never take the lid off or touch the inside unless otherwise specified in the instruction manual.

Remove the input cable when touching inside the power supply.8

In order to prevent people from entering the dangerous areas and/or from touching the high voltage areas carelessly, designate the hazard areas and put up signs of WARNING for those areas. When high voltage is being generated, warning should be given by using warning lamps and/or warning sound.

Draw people's attention.9

Short the output to ground.

NOTRESPASSING

Danger! HIGH VOLTAGE

06

Electrical Shock First Aid

Immediately push the victim away from the conductor where current flows. At the time, do not touch the current-carrying conductor or the victim's body, or you will receive an electric shock.

Turn off the high voltage power supply immediately and establish a ground for the circuit. If it is impossible to turn it off, establish a ground for the circuit or use an ax with a wooden handle to cut the high-voltage cables and remove them. Be careful so that spark of electricity may not occur.

If it is impossible to cut off the circuit or establish a ground for it, use a piece of dry wood or clothes or non-conductive material to help the victim.

Call an ambulance right away.

R e s c u e

1

Begin rescue breathing on the spot. Only when lives of the victim and rescuers at the accident site are endangered, move the victim somewhere safer nearby.

1

Once you begin rescue breathing, continue it until the victim starts breathing spontaneously, or continue it until you take over the victim to a medical institution.

2

When a person who engages in rescue breathing takes turns, try to keep the rhythm of rescue breathing.3After the first aid, be sure to take the victim to a doctor immediately as electrical shock may cause burns inside the body, which can be fatal if left untreated.

Prevention of electric shock should come before emergency first aid which has been explained here. Please use the high voltage power supply after understanding its dangerous aspects so as not to suffer from electrical shock.

4

2

3

4

Do not confuse electrical shock symptom with death. Those symptoms include not only severe burns but also unconsciousness, respiratory arrest, cessation of spontaneous pulse, paleness and mus-cle rigidity. Give rescue breathing immediately if the victim is not breathing properly.

S y m p t o m s

F i r s t A i d T r e a t m e n t

Introduction of Matsusada high voltage power supplies

Small-sized & built-in typehigh voltage power supply

RA / RB series

Rack-mountablehigh voltage power supply

AU series

High-speed and high-pressureamplifier power supply

AMS / AMT series

Handy-type high voltage power supplyES series

·Wide variation of outputs. 300V to 30KV / 5W to30W.

·Compact size and low ripple.

·Full protection for arc and short circuit.

Ultra-compact onboard typehigh voltage power supplies

TA / TC series, TE series

·Ultra-compact size

·Protection against continuous short circuits

·Best suited for photo multi plier due to its ultra-low noise

·800V to 2kV / up to 4W

·Smallest and lightest body

·3 output ranges

·8 to 320V / 80W

·Low noise switching power supply

·Constant-voltage / Constant-cur-rent control

·High stability

·Low price and quick delivery

·1kV to 120kV, Total 315 models ranging from 30W to 1.2KW.

·High-speed response

·Operation with desired waveform

·For beam polarization, corona discharge, etc

·±300V to ±20kV / 100kHz

·Excellent stability as well as low ripple

·Short circuit resistant and sub-stantial protection circuit

·Convenient for experiments be-cause of its small-size and lightness

·1kV to 5kV / 6W, 15W

Compact DC power supplyPK series

http://www.matsusada.comweb site E-mail info@matsusada.com

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Headquarters:745 Aoji-cho Kusatsu Shiga 525-0041 JapanTel:+81-77-561-2111 Fax:+81-77-561-2112

The following operation can be done on the PC display :· Dose of X-ray· Image magnification

· X-ray leakage less than 1µSv/hr · Object protective function

· Auto OFF function· Interlock function

High resolution andwide dynamic rangeEasy operation

X-ray Inspection System

· Stage shift· Image processing

DigitalX-ray Microscope

Safety design