give a pn for a dc breaker
what is the application? Mining, elevator, photovoltaic, traction, ups/converters?
current/voltage range
we use a lot of dc breakers in mining
never saw one that tripped on mV?
Cheap Millisecond Timer
- Thread starter big john
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give a pn for a dc breaker
what is the application? Mining, elevator, photovoltaic, traction, ups/converters?
current/voltage range
we use a lot of dc breakers in mining
never saw one that tripped on mV?
ELA
Senior Member
- Occupation
- Electrical Test Engineer
COTs or no COTs
COTs or no COTs
I heard you say you wanted an off the shelf solution.
In my work there is often a need for a test that is somewhat unique and there may not be a cheap solution unless you are willing to do a little bit of extra work.
If you were interested in a fairly short learning curve an Arduino is a useful tool that you can customize to meet different test requirements. I always prefer an off the shelf solution. Just in case you do not find what you need.
http://www.instructables.com/id/How-to-get-an-Arduino-micros-function-with-05us-pr/
COTs or no COTs
I heard you say you wanted an off the shelf solution.
In my work there is often a need for a test that is somewhat unique and there may not be a cheap solution unless you are willing to do a little bit of extra work.
If you were interested in a fairly short learning curve an Arduino is a useful tool that you can customize to meet different test requirements. I always prefer an off the shelf solution. Just in case you do not find what you need.
http://www.instructables.com/id/How-to-get-an-Arduino-micros-function-with-05us-pr/
SG-1
Senior Member
- Location
- Ware Shoals, South Carolina
How about a 2 channel USB scope ?
http://www.mcmelectronics.com/product/TENMA-72-10155-/72-10155
or
http://www.mcmelectronics.com/product/VELLEMAN-SA-PCSU200-/72-11920
http://www.mcmelectronics.com/product/TENMA-72-10155-/72-10155
or
http://www.mcmelectronics.com/product/VELLEMAN-SA-PCSU200-/72-11920
Aleman
Senior Member
- Location
- Southern Ca, USA
I have used a few of the smart relay type PLCs for various projects. I like these because they can be programmed without a laptop and sometimes you
really don't need an expensive full blown PLC. I looked and IDEC makes some of these styles that include 100khz high speed counters. I haven't used
the IDECs of this style but their stuff is cheap. Look to be around the $150 mark. Have USB outputs that could work with a laptop or etc. If I was trying
to do what you're doing I would most likely go this route. Or use some other PLC with a small HMI and a box.
IDEC FT1A-H12RA or B12RA B12RA
really don't need an expensive full blown PLC. I looked and IDEC makes some of these styles that include 100khz high speed counters. I haven't used
the IDECs of this style but their stuff is cheap. Look to be around the $150 mark. Have USB outputs that could work with a laptop or etc. If I was trying
to do what you're doing I would most likely go this route. Or use some other PLC with a small HMI and a box.
IDEC FT1A-H12RA or B12RA B12RA
We use a scope if we need accurate data
a 225 A cb with uv trip
a Bender rcma423 gf relay holding the uv in, ct on a cb load pole
a contactor that put an adjustable 0-15 A thru the cb (we use a 15 A ngr)
a push button energized the contactor to apply the i
the contactor output was one scope input
the other the cb load out
relay response
uv drop out
cb contact opening
All in 1.5 cycle
15A at a 3A trip setting
a 225 A cb with uv trip
a Bender rcma423 gf relay holding the uv in, ct on a cb load pole
a contactor that put an adjustable 0-15 A thru the cb (we use a 15 A ngr)
a push button energized the contactor to apply the i
the contactor output was one scope input
the other the cb load out
relay response
uv drop out
cb contact opening
All in 1.5 cycle
15A at a 3A trip setting
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