Answer Posted / praveen

3 Phase O/C + E/F + Highset
0C 0
50/51 RYBN
Numerical Relay
Lowset O/C -Is
Highset O/C -Ihs
Lowset E/F -Os
Highset E/F -Ohs
O/C Is = 20-200% Step 5%
E/F Os = 5-80% Step 5%
HS O/C = (0.2 to 40) x In step of -
0.2 In or disable
HS E/F = (0.1 to 20) x On step of -
0.1 On or disable
Time Characteristics available -
NI, VI, EI, or Definite Time
TMS : 0.1 - 1.6 Step 0.05
Site selectable Trip time Char.
Highset can be disabled
Display of Currents, Trip count
Self supervision feature
£ 0.25 VA on CT/Phase
Not applicable
0 to 60 C
< 2kg £ 10 VA
1 N/O Contact for self suprvn
Draw out
121 x 158 x 224
113 x 142
20-110V AC / DC or
88-264V AC / DC
1 AMP or 5 AMP
(site selectable)
4NO or 2NO + 2NC

i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

2278

---

WHAT IS MEANT BY DERATING OF THYRISTOR?

2971

---

What is servo motor? what is its purpose?

2065

---

what is earthing.how we make it,describe briefly.

2630

---

At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

2045

---

Is there any question in the name of Static Switch in UPS??

1965

---

description about dry type transformers

1903

---

How does cost of generation from hydropower plant compare with other sources of electricity?

1066

---

how to select energy meter? have any calculation?

3028

---

How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?

2302

---

HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

2061

---

Hello seniors m an engineering student in 3rd yr..i want to know what are the software course in electrical field?i wanted to do certification course but i dont know much about the course?..Regards

2124

---

why Lightening Arrester Probe sharp at Top of telecom tower.

1574

---

why you don not show protection and type of isolation in key single line diagram?

1987

---

What is EMC filter in VVVF Drive ?

2740

---