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[Amps] INRUSH

To: dpipes@earthlink.net
Subject: [Amps] INRUSH
From: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 26 Dec 2004 16:02:19 -0500
List-post: <mailto:amps@contesting.com>
Dear Dan,

The Inrush Protector product you mention in your previous post is exactly
the ticket.

I just finished a commercial television transmitter repair job
where the owners have replaced 300+ diodes in the last
quarter and were becoming frantic. The 46KW UHF
station had no inrush protection scheme for the Anode
Supply (3-Phase, 480V, 15KV @ 12 amperes).

It took a Crouzet Timer, a P&B 30-amp control relay
and 2 Square-D 100 amp contactors with twelve 400 watt,
6.8 ohm resistors to solve. The resistors don't even
get hot when she steps and no more blown diodes.

By the way, the filter is 2 units of 194uF @ 30KV
and weigh around 200 pounds each.

Hal
W4HBM
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