why voltage rating not mention at HPSV or HPMV lamps?
- 2 Answers
- 5848 Views
- OPS, I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
High voltage is required to strike the arc inside lamp at
the starting point and once the arc is struck and lamp is
illuminated ,the voltage across the lamp is zero.It is the
ballast which has to control the current and it requires
voltage rating and not the lamp
| Is This Answer Correct ? | 7 Yes | 2 No |
Post New Answer View All Answers
how to measure earth resistance of a substation
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
How vfd saving power.
High speed earth switch operation with diagram
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
A low wet bulb temperature indicates
How to know the Max. current caring capacity of the cable by its size ?
What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.
What is the difference between hot and cold loop testing?
IN 1000kva transformer where the oil and winding temperature sensors is connected
What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?
What is difference between Over Current & Earth Fault protection?
A motor running with lenze frequiency inverter stops if I REDUCE SPEED with 25% load.If I run it in High speed and medium speed running smoothly with full load.please help me to solve it.
Why synchronous motor is used in power factor improvement,dc series in lift
full form of flry b
