-----Original Message-----
From: Brian At Work [SMTP:[email protected]]
Sent: Monday, September 13, 1999 9:26 AM
To: [email protected]
Subject: Ground Bond Testers - Continued
Thanks to everyone for your replies.
Using step down transformers, variacs, and current clamps work well
for
performing the Ground Bond test here in our safety lab with trained
personnel, but this is not an acceptable procedure for less trained
production line personnel.
Kyle emits:
This is a problem everyone has to deal with. The best approach is
an up-to-date shop floor procedure and the use of a sprinkling of 'master
technicians' who deputize those who are competent to understand and perform
the tests and train others. A procedure for the tests and a start of day
procedure to maintain confidence in the production test equipment is a must
and to keep the vigil, a per unit checklist with a strong suggestion to
consult the master techs if a question or unusual occurrence should arise..
The lack of a commercial Ground Bond Tester that will achieve high
current
has me wondering if other manufacturers of high current equipment is
performing 100% production line Ground Bond tests. Am I missing
something
here? Does this test not need to be done outside the safety lab?
Am I
foolishly looking for a easy, safe, production line solution for
high
current ground bond testers?
Thanks,
Brian
Kyle emits:
This depends on your agreement with the target agency. We use UL
under listing "NWGQ" and thus in their "Section General" -Section 2.0
Requirements For Factory Tests, therein lies the text of the methods for
manufacture. Chances are you are tied to a %100 production line test of
both hipot and ground bond on each unit. See section 2.1.1.1 for specifics.
There is however, a clause in 2.1.2.1 Test Equipment -that states
<verbatim> "Any suitable continuity indicating device (such as an ohmmeter,
a battery and buzzer combination, or the like) may be used to determine
compliance with the Grounding Continuity Test requirements. Commercial
ground continuity testers that pass a current through the grounding path may
also be used to determine compliance with the same requirements."
Clause 2.1.3 and beyond go into detail of the methods of the
testing. Acceptability is based on simple continuity between the conductive
parts specified.
Hmm, we presently do %100 test of ground bond and hipot at a full
minute each...I'll have to report to my superiors that a ground bond test
for 1 minute is not required. Hey!! I just larned something!! Can I have
a bonus now?? -nope...
Kyle
---------
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to [email protected]
with the single line: "unsubscribe emc-pstc" (without the
quotes). For help, send mail to [email protected],
[email protected], [email protected], or
[email protected] (the list administrators).
---------
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to [email protected]
with the single line: "unsubscribe emc-pstc" (without the
quotes). For help, send mail to [email protected],
[email protected], [email protected], or
[email protected] (the list administrators).
