The use of such devices is necessary to start or ignite metal halide gas lamps, as well as high-pressure discharge lamps with sodium in the base. The principle of operation is usually that the IZU supplies a voltage with a sufficiently high frequency from 2 to 5 kV for a short period.
General Description of Operation
A pulsed ignition device sends pulses to form an arc in the lamps. This occurs due to high, up to several kilovolt, voltage. The supply of these pulses occurs until the moment when the lamp is not successfully lit. Further, there is absolutely no influence on the work from the IZU. It should be noted technology for controlling the ignition of the lamp. It is carried out by measuring the strength of the current that flows through the device. Another control option may be to determine the electrical voltage of the lamp at a current point in time.
Pulse ignition device (IZU) can be either parallel type or serial. In accordance with this, it will have either two or three contacts. In the first case, when starting, high voltage goes not only to the target lamp itself, but also to the inductor. This is a significant drawback of this design and can lead to breakdown. In addition, among others, there are also semi-parallel BZU. In them, high voltage is generated due to the inductance of the inductor.
Key Important Features
The quality of work as a whole depends on a number of parameters. Pulse ignition device for lamps has the main characteristics, which boil down to the following:
- Availability of automatic shutdown. It may be needed in situations where the lamps are either out of order or completely absent.
- Maximum pulse frequencies for the output voltage.
- The highest current allowed when starting high-pressure discharge lamps.
- The period during which each impulse lasts.
- Voltage at startup.
- Maximum cable length from flash ignition device.
- The phase in which the formation of impulses occurs.
- The maximum possible number of on-off cycles, that is, a working resource.
Additional specifications
The first remark concerns the highest current that is issued at the start of gas discharge lamps. In this action, he must always exceed the worker. It is best to look at those pulsed, ignition devices in which the maximum allowable current is 2.5 or 3 times higher.
In addition, it is worth explaining the importance of the magnitude of the voltage at the time of starting the IZU. It is recommended that it be smaller than the network. As an example, we can cite 198 volts for those networks where the voltage is 220 volts or 342 volts for networks with a voltage of 380 volts. However, there is another significant limitation. The voltage value should not exceed that during direct burning of the lamp, that is, 170 and 320 volts for different networks, respectively.
General description of IZU-1M 100/400
Such a device serves for certain purposes. In particular, they are lit with high-quality DNaT and DRI lamps. The power for the first varies from 100 to 400 watts. For metal halide LED lamps, this parameter is in the range from 35 to 400 watts. The latter are launched with an inductive ballast or inductor and are connected to an alternating current network with a voltage of 220 volts at a frequency of 50 Hz. The warranty for this device is 1.5 years, that is, the correct functioning of the manufacturer is designed for approximately such a period.
As for the advantages of such a model, there are several of them. First of all, the IZU-1M pulse igniter can have two semi-periodic ignitions, which form a quick and reliable start. The conditions at the same time allow the start of both cold and hot lamps. It is also worth noting the stability of the operating parameters, which is due to a fixed duration when the voltage fluctuates the mains and an amplitude of from 170 to 242 volts. The components themselves are manufactured by world leading manufacturers, which are the guarantors of quality.
Criteria for choosing an IZU for DNaT lamps
Many people buy unsuitable products with poor technical characteristics due to the fact that they did not have time to familiarize themselves with some tips. For example, one rather common mistake can be included in the number of such misses - the purchase of low or high pressure sodium lamps for completely inappropriate operating conditions. Accordingly, after they buy the wrong pulse igniter for DNaT. By the way, this abbreviation stands for arc discharge lamps.
Experts advise today to abandon the IZU with two contacts. The thing is the notorious penetration when connecting a gas discharge lamp. This usually happens when the insulation of the ballasts is simply not designed to supply such voltage. For this reason, it is better to refuse parallel connection in favor of serial.
Description of DNAT lamps
Previously, such devices were widely used for lighting roads, but recently they have been replaced by LED lamps. However, arc discharge lamps still have a number of advantages. Which, in turn, makes pulsed ignition devices for DNaT lamps even today more than relevant. As an example, one can cite such advantages as a lower cost of equipment, similar ceteris paribus energy efficiency and much greater predictability in terms of operation.
It is worth noting that there are many available methods for connecting DNaT lamps. However, any of them includes the presence of two mandatory components - a compensating capacitor and an IZU. The connection scheme itself can be viewed on the blocks of the pulse device. It is not difficult for any specialist to deal with this connection option, since it is quite simple.
Disconnecting the IZU from the lamps
It is no secret that prolonged exposure to high frequency negatively affects the characteristics of both the devices themselves and the cables. Most affected by this are lamps and lamp holders. Modern pulse ignition devices have automatic shutdown systems. This is primarily due to the fact that when the lamp is burning, the voltage is much lower than that on the network connection. Previously, this problem could not be solved, but in recent years, manufacturers collectively switched to systems with automatic shutdown of the IZU. This is achieved through the use of special digital integrated circuits located in the device.