Atec VLF-28CMF User Manual

High Voltage, Inc. The World’s Source for Cable Testing & Fault Locating Technology

1000 units shipped to 70 countries

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HVI – The World’s VLF Source

Nearly 70 countries served since 1998

•Greatest Model Selection

•Highest Voltages Available

•Highest Power Ratings Delivered

•Only VLF Thumper Produced

•Rugged oil filled non-electronic design offers extreme reliability and ease of field service if ever necessary

HVI offers more models and higher voltage models than any other vendor in the world. Models range from 28kV – 200kV, offering from 0.4μF to 50μF of load capability.

VLF-28CM 0-28 kVac, 0.1 Hz, load rated to 0.4 μF

VLF-4022CM 0-44 kVac, 0.1 Hz - 0.02 Hz, load rated to 5.5 μF

VLF-50CM 0-50 kVac, 0.1 Hz - 0.01 Hz, load rated to 50 μF

VLF-6022CM 0-62 kVac, 0.1 Hz - 0.02 Hz, load rated to 5.5 μF

VLF-65CMF 0-65 kVac, 0.1 Hz - 0.01 Hz, load rated to 22 μF

VLF-90CMF 0-90 kVac, 0.1 Hz - 0.02 Hz, load rated to 2.75 μF

VLF-12011CMF 0-120 kVac, 0.1 Hz - 0.01 Hz, load rated to 5.5 μF

VLF-200CMF 0-200 kVac, 0.1 Hz - 0.02 Hz, load rated to 3.75 μF

VT33 VLF Thumper, 0 – 33kVac, 1uF @ 0.1Hz 13kV @ 760 joules discharge, TDR ready

The HVI VLF technology is protected under U.S. Patent # 6,169,406

Very Low Frequency AC Testers

AC testing of cables and electrical apparatus is now easier than ever.

Since the introduction of the High Voltage, Inc. line of portable and affordable VLF hipots, there is a practical method of AC field-testing various loads, particularly cables and rotating machinery. High Voltage, Inc. offers a full line of VLF AC Hipots from 28 kVac to 200 kVac with models that can test up to 50μF of load, cables over 50 miles in length and the largest of generators/motors. Use

VLF for AC stress tests and/or as a voltage source for

Tan Delta and Partial Discharge cable diagnostic testing.

SINCE 1998, HVI has produced the most rugged and reliable VLF products available. Our electro-mechanical control and our oil filled HV power supply designs are extremely dependable, and if necessary, more easily field serviced than the electronic designs of others. The HVI design has a proven record with nearly 1100 units in service in 70 countries. The HVI VLF design offers the best of everything, with manual, easy to use controls but also sophisticated data collection. Electric utilities and industrials have long recognized the benefit of our technology. HVI knows how to build long lasting field test equipment.

The HVI VLF design produces a sine wave output that meets all requirements of world standards, permitting it to be used as a voltage source for Tan Delta and Partial Discharge cable diagnostic testing. Non sine wave producing VLF designs are limited in this ability and may reduce the users’ options in the future to use the VLF for diagnostic testing. Stick to the HVI sine wave producing VLF.

HIGH VOLTAGE, INC. 31 County Route 7A • Copake, NY 12516 • [phone] • Fax: [phone] • www.hvinc.com

SCOPE

	Why Buy HVI VLF Products?							60
		0
	The HVI Design – Portable,Affordable, Rugged,PEAKReliable, Proven
	What is VLF?		KILOVOLTS
				or soak test, none of which provide meaningful
	VLF stands for Very Low Frequency. A VLF hipot			information about a cables ability to					withstand
				several times normal AC voltage. IEEE 400, IEEE
	is an AC output high voltage instrument. HVI VLF
				400.2, VDE 0276, CENELEC HD 620/621, and IEC
	products provide sinusoidal AC voltage but at 0.1
				60060-3 standards define VLF cable testing.
	Hz - 0.01 Hz, compared to the 50/60 Hz output of
				VLF is also very useful for testing large rotating
	conventional AC test sets. It is still an AC voltage
				machinery, since it provides a portable and affordable
	with sinusoidal polarity reversals every half cycle.
				method of field testing coils and is sanctioned by the
	The VLF instrument is used to provide a simple go/
				IEEE 433 standard.
	no-go, or pass/fail, withstand test. Also, HVI VLF
	instruments can be used as the voltage source for			Partial Discharge & Tan Delta
	performing off-line Partial Discharge and Tan
				VLF Cable Diagnostic Testing
	Delta cable diagnostic testing.	OUTPUT		PEAK MILLIAMPERES
				The VLF hipot by itself provides a withstand, or
	Why VLF?	0						60
				proof test. It can also be used as the voltage source
				for off-line partial discharge and tan delta cable
	VLF test sets are used to field test high capacitanceCABLE CAPACITANCE							0
			6.0
				diagnostic testing. HVI can serve the needs of the
	loads like cables and motors/generators. The lowerMICROFARADS
	the frequency of an AC source, the lower the cur-			industry for cable testing better than any other.
	START			Contact HVI for additional information on other
	rent and power required to apply a voltage to a ca-
	TIMER			cable testing methods and products available.
	pacitive load like a cable. At 0.1Hz, it requires 600
	times less power to test a cable than at 60Hz. The			Benefits of HVI VLFAC Hipots
	HVI VLF instruments permit users to field test
	long cables and large generators with a portable			For more information on VLF testing, download our
	and affordable test set. A 100 lb VLF instrument			VLF FAQ from our website: www.hvinc.com
	can do the job of a multi-ton 60Hz AC test set.			• Portable and affordable
	Cables should be tested with AC voltage. With the			• All models feature a true sinewave output
	HVI VLF products, it can be down with a practical,			• Waveform is independent of load
	economical, and easy to use package.			capacitance between 0.01 μF andMETER
	CAPACITANCE
	SCALE		X10	maximum load
	When and Where Is VLF Used –						μF
									mA
	Cable & Rotating Machinery			• Highest load ratings available
		TO READ		CAP
	PUSH
				• Highest voltage models available
		X1		ZERO
	The principal use of VLF is testing medium and			• Simple and easy operation
	high voltage shielded power cables. A long cable			• AC testing does not degrade good
	may have many microfarads of capacitance. To AC			cable		insulation
	high voltage test this cable requires the use of VLF			• Harmful		space charges are not injected
	technology. An AC voltage test is the best way to			into the cable insulation
	verify the AC integrity of a cable. If a cable can’t			• No traveling waves are generated during
	hold 2 – 3 times normal voltage, it is not healthy and			testing
	an in-service failure is likely. Use the VLF to cause			• BNC scope output for waveform viewing
	defects to fail during the test. Find the fault, make			• Rugged and reliable design less prone
	the repair or replacement, and be left with a better			to failure from transients
	cable. It is especially valuable for verifying a cable			• Much easier to service compared to
	after installation or repair: far better than using			units with solid state design
	a DC hipot, 5kV megohmmeter, hot stick adaptor,

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