Answer Posted / 7anoter4

If the change in load will be the same Pa1=Pa2 and the
rated frequency fo1=fo2

for the same time interval dt1=dt2

IF Pa=H*MVA/180/fo*d2R/dt2 [See IEEE-399 ch. 8.6.2 How
stability programs work]

and d2R/dt2=2*pi()*df/dt

then (df/dt)1=Pa/2/pi()*180*fo/MVA1/H1 and

(df/dt)2=Pa/2/pi()*180*fo/MVA2/H2

(df/dt)2/(df/dt)1=MVA1*H1/MVA2*H2

If MVA1=MVA2 then (df/dt)2=(df/dt)1*H1/H2

df2=12*30/42=8.57 Hz

what is the main function of capacitors in mccs.

1751

---

give me applications of sequence bridges . (used in 3 phase un balanced systems)

1986

---

how to set relay setting? and example calculation...

2060

---

What are the differences between single phase and three phase?

2055

---

Initially, when the input is not equal to the output — what type of response is this?

1071

---

what is meant by moulded case circuit breaker ?

2193

---

What does quality factor depend on in resonance?

1107

---

What is the count of hvdc transmission lines in india?

1106

---

What is 100% protection of generator? Why 100% is not used but 95% is generally used?

1047

---

What is the Difference between Ac Drives and Dc Drives? According to application, speed, Torque, cost, Reliability, Construction, Motor etc... Thankyou !!!

2208

---

I am interested to know what does 15 KVA DG set actually means? If I dont know the DG rating, is it possible to identify KW by simply knowing the diesel consumption?

2178

---

what should be the no load current for 3 phase ac motors ranging from 5 kw to 1000kw?

1805

---

how to calculate the tarriff for an industry whose kva demand is 10 mva

1998

---

What is mean by STUB protection?

2073

---

5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch

3825

---