This issue is half insulation/ accessibilty and reliability. Since you are
going to use the relay in a safety interlock circuit it needs to be certified
for a specific number of actuations.
The failure mode for a relay is closed, welded, and in your avg everyday
commercial model this occurs
two Listed relays in series, each with independent coil drive?
(single fault tolerance)
We have found a relay where the manufacturer specifies an open contact
dielectric strength of 2000Vac but internally each pole has two contacts
with an air gap of 1.8mm for each. Since there are two air gaps
, 2015 12:04 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Relays and Contactors
We have an application where during normal operation the user has access to a
30 amp heating element driven by AC mains. We will interlock a door which will
drive a relay or contactor which will open both sides
-
From: Scott [mailto:sbarro...@yahoo.com]
Sent: Tuesday, December 22, 2015 1:25 PM
To: Kunde, Brian
Cc: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Relays and Contactors
This issue is half insulation/ accessibilty and reliability. Since you are
going to use the relay in a safety interlock
To: Kunde, Brian; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: Relays and Contactors
Are you trying to protect against shock hazard or burn hazard or both? Can you
eliminate the shock hazard with additional insulation or localized guarding?
If the user potentially has direct access to hazardous voltages
We have an application where during normal operation the user has access to a
30 amp heating element driven by AC mains. We will interlock a door which will
drive a relay or contactor which will open both sides of the AC mains going to
the heating element to make it safe.
I assume the relay
On 10/30/2006, Ram Chundru wrote:
I am looking for mercury wetted reed relays/switches that can switch up to 2
kV or higher.
The relays are going to be used in a capacitive discharge application such as
ESD.
Does anyone know if there is a part available with the above specifications?
Hi
Ram,
I have not found mercury wetted relays above 500 volts. I have used the 500
volt, 50-ohm mercury relays for generating ESD pulses in a TLP (Transmission
Line Pulser) system. If you are testing parts on wafer or even packaged parts
TLP is a great way to go. The risetime can be controlled
Hi all,
I am looking for mercury wetted reed relays/switches that can switch up to 2
kV or higher.
The relays are going to be used in a capacitive discharge application such as
ESD.
Does anyone know if there is a part available with the above specifications?
I appreciate your help
Neven,
Digkey stocks several HV relays. I have used this vacuum relay for for ESD
pulse generation: Coto 5501-12-1
Dave Cuthbert
Micron Technology, Inc.
_
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of
neve...@comcast.net
Sent: Wednesday, January 04
Does anyone have recommendation for high-voltage relay manufacturer and
model/PN that can be used to discharge (ESD) up to about 3-4 kV? Relays used
in ESD guns would probabaly work.
Thanks, Neven
- This
message is from the IEEE
In a message dated 10/12/2004 7:16:36 AM Pacific Standard Time,
rchun...@ti.com writes:
Hi all,
I am looking for mercury wetted reed relays that can withstand up to 2 kV or
higher.
The relays are going to be used in a high voltage switching application.
Does anyone know
Hi all,
I am looking for mercury wetted reed relays that can withstand up to 2 kV or
higher.
The relays are going to be used in a high voltage switching application.
Does anyone know if there is a part available with the above requirements?
I appreciate your help.
Thanks,
Ram
Greeting to all,
Our company makes Laboratory Instrumentation which many employs a small furnace.
In case the furnace control circuit fails, we have a secondary Over Temperature
Protection Circuit (OTPC) which opens a double pole relay to shut power off to
the heater coils.
In a new design we
: Cereceres, David [mailto:dcerece...@pelco.com]
Sent: Wednesday, October 09, 2002 1:49 AM
To: 'emc-p...@majordomo.ieee.org'
Subject: Solid State Relays
Hello Group,
We are currently working with our NRTL to acquire a CB Report/Certificate
for one of our products the use a solid state relay to switch
component). As we all
know (I hope) solid state
relays use opto-couplers for switching. Now here
is the question:
As the finish product manufacturer are we
required to provide licensing on
the opto-couplers being used in the manufacturer
the relay?
David Cereceres
-p...@majordomo.ieee.org'
Subject: Solid State Relays
Hello Group,
We are currently working with our NRTL to acquire a CB Report/Certificate
for one of our products the use a solid state relay to switch either 120V ac
or 230V ac.
This relay has been found to meet the creepage and clearance
all know (I hope) solid state
relays use opto-couplers for switching. Now here is the question:
As the finish product manufacturer are we required to provide licensing on
the opto-couplers being used in the manufacturer the relay?
Thank you all in advance for your great knowledge and assistance
Hi,
anyone have a good source for relays for the chattering relay test in DO-160
or MIL-STD 461?
Thanks,
Derek.
In a message dated 5/29/01, Dan Roman writes:
I am looking for a relay that can be used without restriction for a fail
over function between CO trunks and station sets in a PBX type application.
The fail over relays switch select CO trunks over to individual phones
should the PBX fail
Hi Prior.
You wrote:
A client uses PONZ-1 relays in a safety circuit for packaging machinery.
This circuit has been approved by US EU agencies. He would like to
change to EE Controls positive guided relays. The circuit would be
re-evaluated with the EE Controls type SH0!
4 positive guided
-
Original Text
From: Pryor McGinnis c...@prodigy.net, on 4/16/98 2:56 PM:
A client uses PONZ-1 relays in a safety circuit for packaging machinery.
This circuit has been approved by US EU agencies. He would like to
change to EE Controls positive guided relays. The circuit would be
re-evaluated
A client uses PONZ-1 relays in a safety circuit for packaging machinery.
This circuit has been approved by US EU agencies. He would like to change to
EE Controls positive guided relays. The circuit would be re-evaluated with the
EE Controls type SH04 positive guided relays. His
Does anyone know of standards with specific requirements for solid-state
relays (as opposed to more general requirements for all relays - usually
electromechanical) in any European standards. To date we are assuming
application standards like EN 60950 for appliances, computing, industrial
We have recently been hammered by the Machinery Directive and need to find a
source of relays that are Forced Guided Contact relays.. Anyone out there have
a source for these relays??
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