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| HOME / FREQUENTLY ASKED QUESTIONS |
Frequently Asked Questions |
1)What is the difference between shockless and hot static eliminators? 2)How do I maintain my static bar? 3)What are the proper locations for a SIMCO static bar? 4)What are the overall and effective lengths of a static bar? 5)What is the difference between a straight-thru and right angle cable exit? 6)What type of high voltage connections are used on your bars? | - 1)What is the difference between shockless and hot static eliminators?
- Shockless static eliminators are designed with ionizing points, or emitters, that are capacitively coupled to the high voltage source. This limits the current at the points to a very low level. Direct contact with a point will not result in an electrical shock sensation. Shockless or current limited static eliminators should be used in installations where contact with personnel is likely.
Hot (also called "nonshockless") static eliminators are designed to offer greater efficiency in certain restrictive applications involving extremely high charges or dirty environments. The high voltage power supply is coupled directly to the emitter points. Hot static eliminators should only be used when contact with personnel is unlikely and there are no flammable materials present.
- 2)How do I maintain my static bar?
- A properly maintained static bar will give you high performance over its lifetime. Maintaining your static bar requires regular cleaning and operational testing.
1. Before cleaning, disconnect power to the static bar.
2. Using compressed air, blow the dirt from the face and casing of the bar and mounting hardware. Make sure to direct the air stream inside the bar if the points are enclosed.
3. Using a stiff brush, clean the area around each pin.
4. To remove paint and ink buildup, use only Isopropyl alcohol. Wipe off the solvent with a clean, dry rag. DO NOT hang rags on the static bar. This could cause a fire.
5. Visually inspect the cable, bar and power supply for damage.
6. Test the operation of a random number of pins across the bar using a SIMCO Static Bar Checker(part number 4000004). If any pins are not working, check all pins and contact your SIMCO representative with the results. - 3)What are the proper locations for a SIMCO static bar?
- The best locations for a static bar are usually just after the area where the static is being generated or just before the area where the problem is located. SIMCO Electrostatic Fieldmeters provide an easy way to locate and identify the magnitude of the static charge buildup causing your specific problems. Be sure to consult with your SIMCO representative or SIMCO customer service when initially determining the most appropriate location for your specific application.
The material to be neutralized should have a background of free air and NOT be in contact with another surface as it passes the static bar. Static charges cannot be reduced when two surfaces are in intimate contact.
Static bars may be mounted in any position provided the emitter points face the material to be neutralized. Bars can also be mounted on either side or both sides of the material.
Static bars should be mounted 1/2" to 1" away from the charged material. The exceptions are the PSH-N,R50 and R51 bars. These bars can be located up to 6" away from the charged surface of moving materials.
Static bars MUST be grounded for proper operation and safety.
- 4)What are the overall and effective lengths of a static bar?
- The overall length is the distance from one end of the static bar to the other. It excludes the strain relief on the cable output at the end of a "straight-thru" cable exit, which can increase the operative effective length of a bar by one or two inches. Overall length is important to know so you can ensure that the bar fits inside the machine frame or within the confines of other fixed obstructions in the area where the bar will be mounted.
The effective length is the distance between the ionizing points at each end of the bar. For almost all static bars, the effective length is shorter than the overall length. If you want to neutralize a web or sheet, the effective length of the bar should be approximately the same as the width of the web or sheet.
- 5)What is the difference between a straight-thru and right angle cable exit?
- Electrically powered static bars have a high voltage cable which exits from one end of the bar and is connected to a high voltage power supply. The most popular type of cable exit is a "straight-thru" exit, meaning it exits on a straight line out of one end of the bar. If the mounting for a static bar is particularly tight, many bars will allow a right angle cable exit, which reduces the size of the area needed for mounting the bar.
- 6)What type of high voltage connections are used on your bars?
- SIMCO bars come with detachable connectors, rather than molded connectors, for attaching a bar to a high voltage power supply. This allows the cable to be trimmed to the desired length for a tidy installation.
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