Questions tagged [ballast]

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How to select equivalent replacement ignitor for metal halide fixture? [migrated]

Situation: I inherited 3 100W overhead fishing lights (metal halide with pulse start) and one of them died circuit doesn't have a capacitor, but has ignitor; bulb is marked with ...
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  • 101
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1 answer
55 views

Switching a fluorescent ECG with normal relays

I want to switch a ballast with a relay. The target lamp is rated at 120 W, but the (electronic) ballast states a 55 A inrush current. Does this mean that as soon as the relay is closed, 55 A will be ...
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2 answers
155 views

Why would you place a resistor in series before AND after a diode (see simple circuit)?

For an assignment we had to first simulate a circuit (first with a Schottky then with a rectifying diode) in LTSpice and then do measurements on an actual circuit before answering a few questions. ...
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3 answers
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Motor voltage LED indicator is dead

I built an ESC for my Raspberry Pi. This ESC has LED indicators. The problem is that the motor LED indicator that indicates modulated 5 V is dead after days. This happened to two models. One has ...
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What is the possible reason that cause the failure (burnt) of PTC in an electronic ballast?

What is the possible reason that might cause the failure (burnt) of PTC in an electronic ballast? I have been using this VOSSLOH SCHWABE brand electronic ballast and recently it has been burning up ...
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1 answer
77 views

UV-C lamps flickering problem

I have got 8 UV-C lamps connected to a portable battery(AC) through a smartplug. I am using 4 UV Ballast with 2 lamps connected to one ballast. I am controlling the lamps with help of a wireless ...
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3 answers
134 views

Can an LED "fluorescent replacement" tube be powered without a ballast?

Two high-rep answers seem to have made the same misunderstanding, so to clarify: My LED replacement tubes DO work with an existing, unchanged magnetic ballast. 2 fluorescent tubes out, 2 LED tubes ...
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Duration of inrush current for high pressure sodium lamp with electronic balast

I'm trying to find reliable information regarding the duration of inrush current for high pressure sodium lamps with electronic ballasts. This document states that: "In reality, due to the ...
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How to power a 17W T5 Germicidal UVC Lamp?

I recently bought a SBL 350T Germicidal Lamp from American Ultraviolet, but have been having some trouble finding out how to power the lamp since I do not have much experience in lighting and the base ...
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CFL Ballast Calculate Primary Turns

There are online designs that use a simple ferrite bolt 50 turn primary and 500 turn seccondary powering one 5 watt CFL. I attempt to customize it with: Specs: TDK Core (source) Vin primary= 6V DC ...
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1 vote
0 answers
158 views

Repurposing CFL ballast for different bulb (UVC)

I am attempting to repurpose the (electronic) ballast contained within a CFL lamp to power a UV-C bulb (mercury discharge, uncoated tube) for disinfection purpose, and out of general interest in ...
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2 answers
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How does a non-integrated compact fluorescent lamp work?

I have some bulbs similar to this one: Osaga UV-C Lamp 36 W PL-L 2G11 (I can't find a manufacturer page for it) Can anyone explain how does such bulb work and what other components I need to make it ...
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2 votes
3 answers
1k views

Does current still flow through ballast with fluorescent bulbs removed?

I have a 3 fixtures each with 4 fluorescent tubes with ballast replaced about 8 years ago and these fixtures are connected to the same switch in the kitchen. This am there was an smokey smell and the ...
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1 answer
298 views

Magnetic ballast with g23 bulb with capacitor

I am trying to make a UV-b photo-therapy light and want to make sure I'm understanding the circuitry correctly-so i don't hastily burn a $50 bulb. Im using a Phillips PL-S 9W/01/2P (link here). It's ...
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2 votes
1 answer
488 views

Can this 1000W ballast be wired for 240V and plugged to 120V to run a 400W MH Lamp?

I've a 1000W MH ballast. Is it okay to use the wiring for 240V the ballast and use it on 120V? Like does it reduce the ballast to 500W? I've attached a video for better understanding of how the bulb ...
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1 answer
481 views

Is it okay to run a mercury vapor lamp of lower wattage (100/150/175W) on a 400W MHL/MVL ballast? Also can a 60Hz ballast be used on 50Hz?

I have this RAB BMHH400PSQ metal halide pulse start ballast 400W, M135/M155 MULTI TAP 120-277V. Since the MVL are being phased out it has become quite difficult to get a ballast for one of these and ...
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1 vote
1 answer
1k views

Current limiting ballast for a transformer

So, guys, I hope you can explain to me how to calculate the necessary parameters for a ballast to limit the current on the primary side of a high voltage transformer.It is for a tesla coil project. To ...
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2 answers
56 views

Current calculation

I have a question of confusion in my mind, so I thought to share it with you all. when we connect a halogen lamp of 12 VAC 50 watt to 220 VAC with the help of transformer, why the current consumption ...
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1 vote
1 answer
156 views

Is it possible to connect ballast in parallel with AC source without resistor?

I am working on a project that will implement automatic power factor correction for inductive loads. I would like to use the ballast from a fluorescent lamp as my test load for this project. Is it ...
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0 answers
2k views

4 bulb Ballast only lighting 2 bulbs

I have a six T8 Fluorescent light fixture. The 2 inner bulbs are powered by a 2 bulb ballast GE232-120RES-DIY, and the 4 outer bulbs, 2 on each side are powered by a 4 bulb ballast GE432-120RES-DIY. 2 ...
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1 vote
1 answer
4k views

How to test a pond filter UV lamp and ballast?

I bought a new UV lamp for a pond filter but I don't see any light from the inspection lens in the lamp holder. I checked the the connection in the socket and I see 240v. Does that mean the ballast ...
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1 vote
1 answer
364 views

Does a high voltage power supply need a ballast?

I am currently trying to build a power supply for multiple kV. According to Wikipedia an arc has about the same resistance as Metal. I am building my power supply with following parts: frequency ...
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2 votes
3 answers
6k views

Using a microwave oven transformer as ballast by shorting the secondary

I am self learning electricity and have some basic understanding of RLC circuits. I came across 2 separate articles (here or here) describing playing around with microwave oven transformers (MOT) ...
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1 answer
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How does ballast pnp regulator work?

I saw this ballast regulator on internet. On this scheme NPN based, I easily understood the Vout = Vref - Vbe. simulate this circuit – Schematic created using CircuitLab But I don't ...
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0 votes
1 answer
132 views

How to determine what ballast for fluorescent lights?

I am creating a UV Cleaner, but this is my first time working with fluorescent bulbs and I wanted to make sure I'm doing it correctly. I got the following fluorescent bulbs: GT15T8 Philips UVC Bulb ...
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0 votes
2 answers
4k views

Fluorescent tubes in series?

Is it possible to use fluorescent tubes wired in series, provided that the ballast can supply a high enough voltage and power? Problem description F28T5 are too long (4ft) for me, so instead I plan ...
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5 votes
1 answer
3k views

Using Oscilloscope So That Nothing Blows Up

I want to see the input current waveform of an LED T8 18W. An EM ballast is purposely placed in series with the lamp. I don't have a power analyzer. What's available is a GDS-2102 oscilloscope. So I ...
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1 vote
2 answers
161 views

Why does compact fluorescent lamp (CFL) save more energy?

I read information about fluorescent lamp and compact fluorescent lamp (CFL) but I still don't understand why CFL saves energy and produce the same amount of light? Maybe the electronic ballast ...
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1 vote
1 answer
105 views

Power on ballast without light tube

I need to turn on an electric ballast without connecting the fluorescent tube, since I'll use the ballast's output to power another device. My single-lamp ballast has 4 output wires. This is how ...
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1 vote
2 answers
509 views

DO we have to ground transformer?

I am using the transformer (a ballast), and its specfication sheet could be found here ballast specification. But on the data sheet, it doesn't says where we need to ground it. Usually, we would ...
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0 votes
2 answers
1k views

Auto-Transformer: how to understand the following diagram?

I have a question about the CW Auto-Transfomer that I will be using. The wiring diagram is above. As you can see, the equitment takes 277/240/208/120V as input. But on its specification sheets, it ...
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2 votes
2 answers
3k views

Limiting mains current

What would be the best way to limit mains (240V @ 50Hz) current? I want at least 1A of current. The output should be AC 240V at any frequency greater than or equal to 50Hz. It should be able to endure ...
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3 votes
1 answer
1k views

How does a reactive ballast work?

I want to use a MOT (microwave oven transformer) for something it's not intended for. As a consequence, I need to limit the current so it doesn't melt itself. I am planning on connecting the ballast ...
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-1 votes
2 answers
183 views

Electron Carbonization issue related to inductors and ballasts

I have searched on the internet and I found nothing on this area. Not even a wiki page, and not on several book glossaries. This is related to the CCFL ballasts and inductors that used to control the ...
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