Transcript
HP ProCurve Lightning Arrester (J8996A) Guide description The ProCurve J8996A gas-discharge lightning arrester provides high-level protection for transmitters and receivers at RF-communication sites. In the event of a local strike, the unit’s gas discharge tube ionizes instantaneously to limit sudden voltage surges across the coaxial line. When connected to a satisfactory ground, the J8996A can safely shunt up to 5000 Amperes of impulse current away from sensitive station equipment. Lightning arresters are not included with the antenna and must be purchased separately.
Gas discharge tube
Figure 1
SAFETY WARNING: PROFESSIONAL INSTALLATION REQUIRED: Prior to installing or using this device, consult with a professional installer trained in RF installation and knowledgeable in local regulations including building and wiring codes, safety, power,indoor/outdoor restrictions, and license requirements for the intended country. It is the responsibility of the end user to ensure that installation and use comply with local safety and radio regulations. Warning: Surge protection and grounding: When connecting an outdoor antenna make sure that proper lightning surge protection and grounding precautions are taken in accordance with local electrical codes. Failure to do so may result in personal injury, fire, equipment damage, or a voided warranty. The HP ProCurve hardware warranty does not cover damage caused by static discharge or lightning strike.
MAINTENANCE The life expectancy of the LAC6 lightning arrester depends upon the frequency and severity of electrostatic activity at the site. Low-level conduction resulting from nearby storm activity has little impact on the unit’s life, but powerful surges induced by on-site strikes will eventually result in degraded performance or failure. Signs of degraded performance may include reduced receiver sensitivity, above-normal VSWR readings, and RF heating of the arrester body during transmit mode. Should the gas discharge tube in the LAC6 fail totally, it becomes a permanently conductive protective shunt to ground. Periodic VSWR checks provide a good indicator of deteriorating performance, and replacement may be indicated following especially severe weather events where multiple on-site strikes were known to occur.
© Copyright 2010, Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Printed in Part Number: 5998-0350
Ground Lug
Specifications Item
Specification
Insertion loss
0.4 dB max.
Impulse Breakdown voltage: (1 KV/microsec max.)
700 V Nom
VSWR
1.4:1 max.
Impulse Discharge Current
5,000 A
Insulation Resistance
50 Meg Ohm
Input RF Power, 100 MHz / 6000 MHz
250 W / 10 W
Dimensions, in.
2.4 x 1.2 x 0.9
Enclosure
Nickel-plated Brass
Warranty and Support Information See the warranty and support information included with this product. For the latest information, go to www.hp.com/go/procurve/support.
INSTALLATION
Figure 2
For best results, install in close proximity to a low-resistance ground at a point where the coaxial cable enters the building or attaches to an AP. To connect your arrester to ground, use a very short and direct run of #8 solid copper wire, or equivalent. For exterior installations, weatherproof the coax connectors with a suitable mastic or rubberized tape to prevent water incursion. See Figure 2. Be sure to install in an accessible location that permits periodic inspection and (as needed) replacement of the gas cartridge. Provide drip loops in cables to prevent water from entering the building or AP. See Figure 3.
Figure 3
HP ProCurve Networking
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HP ProCurve Lightning Arrester (J8996A) Guide
