Electrical Equipment Protection in Hazard Areas
Some questions regarding electrical equipment protection in hazard areas.
What is the major difference between SIS (safety instrumented system) and HIPPS (high integrity pressure protection system)?
Barrier for Temperature Sensor
Does temperature sensor (Pt-1000-Skin type) require barrier/isolator in flameproof panel when used in hazardous zone 1 area?
What is the HFT of QMR system?
What is the HFT of QMR system? Comapre QMR with TMR??
Pressurized Nema 4x Enclosure
Certification for a pressurized Nema 4x Enclosure for hazardous location
Wiring Up 7 Emergency Stops on a Conveyor
Looking for a diagram for wiring emergency stops on a conveyor.
By d on 6 April, 2017 - 2:59 am
Without the ladder or Logic drawing of the plc controls it is not possible to properly assess what...
Electronic Circuit Protection
Surge/Transient/Lightening protection of transmitter.
Using a intrinsically safe positioner in non-hazard area
Ex ia Transmitters and Barrier
Using an Ex ia transmitters without a barrier
Can Zone 2 Gc Equipment Inside a Zone 1 Gb Ex de Enclosure
Can zone 2 IECEx equipment go inside a zone 1 rated panel, or, is the atmosphere inside a Ex de Gb panel de-rated to zone 2?
What kind of experiences have you had with industrial viruses and malware?
Ex nAC Device in Enclosure Ex e
I want to use an Ex nAC device in Ex e enclosure.
By Mr Sweeney on 14 May, 2017 - 6:18 pm
Hi, >Can I use an Ex nAC device in enclosure Ex e or this device >must have an Ex de...
Wireless Transmitter for High Temperature Application
Need Wireless Transmitter for high ambient temperature.
Shutdown and Blowdown Valves in Oil and Gas Processing
Looking for safety information on Shutdown and Blowdown Valves
Barriers for Pressure Sensors, Temperature Sensors, and Solenoids.
Requirement of barriers in control panel (safe area) for instruments (sensors & solenoids) which are in gas group IIA/IIB. (application compressor)
Active and Passive Barriers
Difference between active and passive intrinsic safety barriers
By Nik Ammar on 3 January, 2017 - 6:53 am
The details of the topic is of course very complex. But the concept is very simple actually. The...
Placing a Motor in an Explosion Proof / Intrinsically Safe Location
What are the physical/electrical barrier requirements if I want to locate a motor in a hazardous location with its associated drive outside of the hazardous location?
By Bob Peterson on 9 December, 2016 - 12:42 pm
One other thing. In general, Division 1 areas are surrounded by division two areas. So even if...
By Bob Peterson on 6 December, 2016 - 8:52 pm
this is not really a DIY type of project. You might want to get some experienced help. Having...
Basic difference between Zone-2 and Zone-1 equipment
Exd/Exe equipment for Zone-2 and Zone-1
By will hunt on 11 November, 2016 - 12:24 pm
Hello Please be careful following zone 1 and zone 2 certifications. They are designed to protect...
Requirements for Sil 3 System
Questions about SIL 3 system requirements
By W.L. Mostia on 14 October, 2016 - 8:27 pm
You should not be implementing a SIL 3 system unless you know how to so. This is not a learn as...
does Ex d Ib need IS barrier?
does Ex d Ib instrument need IS barrier?
For ATEX Ex certification, is the barrier/isolator included in the equipment when the ATEX marking is: Ex ia d IIC?
Ex ia and IECEX Flameproof, ATEX Flameproof, CSA/US-Exp.
can we use IECEX Flameproof, ATEX Flameproof, or CSA/US-Exp device instead of Ex ia rated device for Zone 1?
By gunawan556 on 5 August, 2016 - 4:09 am
There is flameproof rated device available for zone 1. But the type of protection which are...
By Bob Peterson on 4 August, 2016 - 6:03 pm
*WE requested supplier to supply Ex ia rated device for Zone 1 and he replied he can only supply...
Are IS Barriers Required for Instrumentation Rated Class II?
Is Safety relay controlling multiple control relays advisable?
Chemical Resistant Enclosure Experience/Advice Needed
Our enclosure gaskets are melting due to acidic enviroment.
Use of Ex'i' Certified Transmitter Without Isolating IS Barriers
Posted by Mohan Jayaraj on 23 April, 2016 - 1:59 am
Can Ex'i' certified transmitters be used in zone 2 without applying IS philosophy?
Connecting Ex na [iC] Field Device
Connecting an Ex nA nC [ic] device and zenner barrier