Re: [PSES] 100 megohm test

2012-05-24 Thread John Woodgate
In message 507B8A65DA954724B861AAA6F66AF052@RichardHPdv6, dated Wed, 23 May 2012, Richard Nute ri...@bendbroadband.com writes: In safety, insulation is the principal safeguard against electric shock. The electric strength of the insulation is the key parameter for preserving the insulation

[PSES] 100 megohm test

2012-05-23 Thread Kunde, Brian
Dear Experts, We have been asked by a customer if our products passes the 100 megohm insulation resistance test. Being a laboratory equipment manufacturer, we are not familiar with this test. Can anyone provide me with more details regarding this test? 100 megohm between what and what? Is

Re: [PSES] 100 megohm test

2012-05-23 Thread Brian Oconnell
Insulation Resistance test NOT same as di-electric withstand. Classic instrument often refered to as 'megger'. IR tests are typically done at lower test V than D/E withstand. Depending on rating of components, IR test voltages can be applied anywhere the insulation quality must be quantified, and

Re: [PSES] 100 megohm test

2012-05-23 Thread Ron Wellman
Hello Brian, This is usually a Portable Appliance Test (PAT) requested mostly by UK Customers. It is simply a 500 VDC dielectric withstand test where you measure resistance. In the old days, before cell phones, IEC 348 required this test. In my opinion, this is a left over test that has not

Re: [PSES] 100 megohm test

2012-05-23 Thread John Woodgate
In message 005301cd3910$a46c3fb0$ed44bf10$@wellman.com, dated Wed, 23 May 2012, Ron Wellman rwell...@wellman.com writes: This is usually a Portable Appliance Test (PAT) requested mostly by UK Customers. It is simply a 500 VDC dielectric withstand test where you measure resistance. In the old

Re: [PSES] 100 megohm test

2012-05-23 Thread Brian Oconnell
There are IEC standards where the TC issued interpretations where a min IR was specified for some components that bridge mains. Various IR test methods are common for North American standards - for example, UL/CSA2556 says The megohmeter or megohm bridge shall be connected to the specimen and the

Re: [PSES] 100 megohm test

2012-05-23 Thread Richard Nute
Hi Brian: Related note - have been running long-term (day 22) test, inspired by another PSTC thread, where a unit is continually subject to 1500Vac D/E withstand. At irregular intervals, or until the boss tells me to stop wasting time, I remove the unit from hi-pot and perform IR