Answer / jayeshsangani1988@gmail.c

zenner barrier is safety barrier for hazards area for current limiter,voltage limiter.
and zone for hazard area classification for duration based.
zone 1- explosive mixture of gas,vapor,is present in continuous
zone 2- explosive mixture of gas,vapor,is like to occur in normal operation
zone 3- explosive mixture of gas,vapor,isn't like to occur,and if occur is vary short time.probability is vary less in year

Answer / ram singh yadav

A Zener barrier is an associated equipment that is installed in the safe area. It is designed to limit the amount of energy that could appear in an electrical circuit passes through the hazardous area despite the connection before the barrier.

A barrier consists of:

1. Resistors to limit the current

2. Zener diodes to limit the voltage

3. Fuses to protect the components

IF PLC POWER FAILURE THEN WHAT HAPPEN?

2 Answers   IFFCO,

---

Absolute pressure is 700psi,what will be the gauge pressure?

1 Answers   IFFCO,

---

How we can re-range the DP transmitter, range is -0.5 to 2.0bara. new range is -0.5 to 5 bar

2 Answers   Rosemount,

---

in split range control system we are using two control valves,but we have only one positioner and one feed back link.so how we use this one feed back link for two control valves?

2 Answers  

---

What is the Flow rate ?

2 Answers  

---

How oil line flow measured?eplain about instruments used and working principle?

0 Answers  

---

pressure switch range 0 to 2bar.i have to install from ground level to 5 meters height.what is the formula the to increse the range ? and every 1 meter how much pressure should be add ?

3 Answers  

---

Name some of the common protocol use in automation.

3 Answers   Empower,

---

How do Foundation Fieldbus works? how the Communication Carries out from Foundation field bus,Field Devices and Controller? Were it's Application in the Field? For Which Signals this is Used? PLease Find this answer for this Question Detaile wise because i want to clear the Concept Regarding Foundation Field Bus,if Possible please attach the link of Document with Contails Diagramatic So that more esier for me.

3 Answers   Honeywell,

---

what is RPI and NUT in controlnet networx. what happen if we are increase the NUT of controlnet networx?

1 Answers   Schneider,

---

in which mode of the zener diode act when load voltage is approximately constant

1 Answers  

---

what is the deluge ? How can its working?

2 Answers   KOC,

---