Method Of Treatment and Cautions for HID Lamps and Ballasts

1. Considering Choice
Mercury discharge lamps cannot control the current by itself so ballast controls lamp�fs current. When starting the lamp on, ballast
increases necessary voltage and transfers it to the lamp which keeps the illumination from constantly changing power voltage.
Thus, we need the proper individual ballast.
The following conditions listed are necessary when you choose the ballast:
1) Selecting a ballast depends on power source.
Please select proper ballast according to power voltage.(110V or 220V, in special cases 380V, 480V etc)
2) It doesn�ft matter whether you use an inexpensive general type ballast or not when you have a small lamp capacity (Wattage) or
using it only in a few places.
3) If the lamp capacity is large or it is connected with many lines, high power-factor ballast is more proper.
4) When the power voltage is altered greatly, or the voltage decreased significantly between the connection lines, the electrostatic type
ballast or the multi-lamp type ballast are appropriate.
5) If the capacity of line and equipment machine are insufficient, and equipment moving deficiency are big problem due to an
over-current when the lamp is restarting, an electrostatic type ballast and multi-lamp type ballast are appropriate. These ballasts have
lower starting current than the settled current.

2. The advantage of high power factor type ballast for several lamps
High power-factor ballasts are more expensive than low power-factor ones because they have a power-factor improvement condenser.
However, due to the small input current, you can save wire and electricity cost and consequently you can determine the power factor
by following formula:

                                                 Input wattage
Power-factor =______________________�~100
                              Power voltage �~ Input current

            W1
= _________�~ 100
      V1 �~ I1

Power-factor changes according to the load. When resistant is loaded, power-factor is good(100%), but power-factors of choke coil &
condenser get worse.
When ballasts are installed in Mercury lamps, they have no power-factor improvement, so low type ballasts power-factors are only
55~65%. If ballast has a power-factor improvement condenser then high type power factors of ballasts are 85~95%.
If power-factor gets worse, the following condition could occur:
with constant input voltage, connect a lamp to high power-factor type ballast(power-factor 90%) and low power-factor type ballast
(power-factor 60%) sequentially. So from the formula, when V1 and W1 are constant, low power-factor�fs input current is 1.5times
stronger than high power-factor�fs. Therefore, if you use a high power-factor type ballast;
1) Line cost and power trans cost are cheaper because of small input current.
2) The electricity cost is cheap because it depend on low power-factor.
3) Ballast price is expensive, so use low power-factor type ballast for a little quantity of lamps; otherwise use high power-factor type
ballast.

3. Advantages of electrostatic type ballast and multi-lamp
The light of Mercury Lamp changes in proportion to the Power Voltage. This change depends on the ballast�fs characteristics. For
example, if a general type ballast changes by 10% in power voltage, it will affect 20~25% of the lamp�fs brightness. To prevent this,
install auxiliary lamps on the power side. After installed, changing voltage cannot be controlled. Because these changes include lamp�fs
output and input current. It greatly affects on line capacity of power side and capacity of other devices. So, the electrostatic type and
the multi-lamp type are the appropriate ballasts. These ballasts change the lamp�fs output within 5% and power voltage within 10%. As
it changes in small rate, you do not need to turn off the lamps, even the power voltage deceased by 30%.
You can use lines and other devices of the original design for small start current and the following cases are appropriate:
1) When power voltage changes significantly.
2) When using the maximum number of mercury lamps according to power and line capacity.
3) When voltage drops at the end of a long power line.
4) In case of starting welding devices and high current consuming motors, when power source is connected with heavy loads, power
voltage will decrease and lamps will turn off temporarily.
If voltage decreases by 30% in electrostatic ballast, lamps will not turn off completely.

4. Ballast for high capacity lamp type.
For 2000W of high capacity lamps need more than 300V starting voltage to start, so lamp circuit voltages are over 300V. Thus, you
must use an insulating transformer for safety. In case of opening power voltage automatically when you remove lamps, you may use
an auto transformer. Our company developed the following ballast by request, so select ballast according to your purpose.

Choking Coll Type
Transformer Type

5. Method of ballast treatment
1) Use the general ballast in a temperature below 40��. Usually ballast is made of �gA�h type insulator and the allowance temperature
of insulator is 105��. According to KSC 8104, �gA�h type insulator winding temperature increases less than 60��. So, 105-60=45��.
However, considering the change in power voltage, the temperature is normally below 40��. If you have to use it over 40��, please
contact us.
2) Separate the ballasts 20m from others when using the ballast where radiant rays are in concern. When ballast is operated in the
airtight box, consider its radiation.
3) You should down the outgoing wire when you install the Ballast.
4) Our ballast products are filled with thermosetting synthetic resin polyester, which has an excellent thermal conduction ability. The
internal heat of Ballast is translated to surface heat, so the surface temperature is pretty high(KSC regulation is below 50��).
Multi-lamp type ballast�fs iron core is exposed except for the winding, therefore it is small and has light-weight.
5) Ground the ballast.
By technical standard regulations, you must ground the ballast onto the grounding terminal.
6) Use power voltage within �}6% of the rated voltage and use proper tap for power voltage.
7) Connect power and lamps by using the connecting diagram on the surface.
8) Pull out outgoing line gently.
9) If you have used the ballast for a long time continuously, the heat reduces the condenser�fs life, so you have to pay attention to
examine regularly every year if you have used ballast over five years.
10) When using a ballast for a long time in a poor condition, put a thermo-fuse with an on-off switch or use a radiator type ballast.
11) In case where the circumference temperature is over 40��, use a high temperature type ballast, which can operate with a
temperature up to 180��(H type insulation).
12) In a case where the circumference temperature is below -10��, use a cold type ballast. At a temperature below -30��, use a ballast
for a cold type Mercury lamp.
13) Use gas-filled type explosion proof ballast where flammable gas is produced.
14) Use tap or insulation when you don�ft use a power tap. If you shortened the tap by mistake, ballast will burn out immediately and
all lamps will be damaged.
15) If you do not use the rated frequency with lamps, the lamp�fs life will be reduced and the ballast will burn. Please use rated
frequency.
16) Use third type grounding construction for the ballast when the second voltage is over 300V without load or over 1A lamp current.
17) Keep wire voltage drop within 6% from ballast to lamp for lamps sometimes turn off because when the voltage drop to second
circuit of ballast is too big.
18) In case you use improper ballast(including different wattage), if impedance is too high, it will be hard to discharge the electricity
because the lamp current will be reduced with a cooled down terminal. In the opposite case, the lamp current will overflow and
consequently decrease the lamp�fs life. Thus, use the proper ballast.
19) Use an anti-moisture type ballast in a moist environment.
20) When testing ballast�fs insulation, disconnect lamp or power connection from the ballast.
21) For high pressure sodium lamps, use over IV(600V) insulating wire and keep the following wire away from the ballast to the lamps:
a) under 15m with IV wire
b) under 10m with rubber captive cable
c) under 10m with F cable
22) connect condenser which is over 500V internal pressure capacity and under 0.1~0.2��f to voltmeter, input terminal to keep it
parallel when measuring ballast�fs 2nd unloading voltage of high sodium lamps and high pressure mercury lamps.
23) you need a lamp ballast when using multi-lamp type ballast.
24) If you turn off some lamps that are being used with a multi-lamp type ballast, the lamp�fs brightness will decrease until half of the
Lamps are turned off. If you turn off more than half, the lifetime will decrease with incomplete turning on.
25) When using multi-lamp type ballast, the ballast should only be related with the lamp�fs wattage. Use proper lamp wattage.