Answer / rahul

*Sink means the equipment need external supply.
*Source means equipment generate its self.

In term of PLC all inputs are sink and all outputs are source.

In terms of drive the control unit which need external supply for operation thats are sink type and the control unit which generate supply for controlling thats are source type.

Answer / ravinder

sinking and source of plc is Positive and negative supply
or logic high and low .

how to get electrical supervisor competency certificate in gujarat. i did 3 year diploma in electrical

0 Answers  

---

what effect will 10 milliampere current cause to human body

1 Answers   NPCIL,

---

what will be the breaking capacity of MCCB of 1000kVA (6% Impedence) transformer? Voltage being 415V, Power Factor 0.8.

2 Answers   BPC,

---

Why cant we connect the motor output to generator and then generator output to motor ?

4 Answers  

---

Explain the experiment on ward leonard method of a speed control on a dc shunt motor with an suitable circuit diagram.

0 Answers  

---

what is integrated ac contact circuit

0 Answers  

---

what is mean by power factor

9 Answers  

---

what happen if we give 220 volts dc supply to d bulb r tube light?

9 Answers   NHPC,

---

why we multiply 11 in High Electric supply?(eg.11KV, 33Kv, 330Kv etc.)

3 Answers  

---

132 KV TRFO BUSHING CT BURNT WHEN A 6.6KV HAS BEEN APPLIED TO IT .WHY .ANY REASON ?

3 Answers   vguard,

---

A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?

2 Answers  

---

Why current leads the voltage in case of capacitor load? Why voltage leads the current in case of inductive load? Why both are with in phase in case of restive load?

3 Answers   TATA,

---