Handbook of Electrical Engineering

WORKED EXAMPLE FOR CALCULATING THE PERFORMANCE OF A GAS TURBINE 553 Therefore, from (2.17), ηi= 1. 0 − ( 273. 0 + 950. 0 )× 0. 5 ...

554 HANDBOOK OF ELECTRICAL ENGINEERING Step 9. The relationship between ‘γ’ over the range of 1.33 to 1.4 and ‘Cp’ over the rang ...

WORKED EXAMPLE FOR CALCULATING THE PERFORMANCE OF A GAS TURBINE 555 Step 12. Find the compressor conditions The starting conditi ...

556 HANDBOOK OF ELECTRICAL ENGINEERING The average value ofT 3 andT 4 eis 988.734◦K. From the cubic expression in Table 2.1 for ...

WORKED EXAMPLE FOR CALCULATING THE PERFORMANCE OF A GAS TURBINE 557 Let T 4 a=T 3 ( 1 −rptδt)ηcηt T 1 a=T 1 (rptβt− 1 ) T 3 a=T ...

Appendix G Worked Example for the Calculation of Volt-drop in a Circuit Containing an Induction Motor G.1 Introduction The follo ...

560 HANDBOOK OF ELECTRICAL ENGINEERING Figure G.1 Simplified one-line diagram for calculating the volt-drop of a 500 kW HV motor ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 561 iv) Motor control centre data. Rated voltage= 4 .16 kV S ...

562 HANDBOOK OF ELECTRICAL ENGINEERING Convert to system base values. SWBD load kVA=Sog= SWBD load power SWBD load power factor ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 563 Convert to system base values. MCC load kVA=Sol= MCC loa ...

564 HANDBOOK OF ELECTRICAL ENGINEERING The total VA rating for the cable= √ 3 ×Rated line voltage×Rated phase current = √ 3 × 50 ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 565 Similarly the phase ohmic reactanceXmrpis:- Xolp= ( Phas ...

566 HANDBOOK OF ELECTRICAL ENGINEERING The starting impedanceZmspis:- Zmsp= Phase voltage Starting current = 4000 √ 3 × 431. 64 ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 567 Motor feeder cable Rcm= 0 .00844 pu Xcm= 0 .003175 pu Mo ...

568 HANDBOOK OF ELECTRICAL ENGINEERING which has a magnitude of 0.9936 pu. Find the initial emf,Eo, of the generator. At the SWB ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 569 Zmnlc=Rmnlc+jXmnlc=Rmnlc+Rcm+j(Xmnlc+Xcm) = 0. 00844 + 4 ...

570 HANDBOOK OF ELECTRICAL ENGINEERING The parallel impedance of the running motor isZmn:- Rms= 3 .8244 andXms=j 0 .9875 pu The ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 571 Hence the terminal voltage of the generatorVgsis:- Vgs= ...

572 HANDBOOK OF ELECTRICAL ENGINEERING MCC terminal voltage in percent. No-load voltage=pre-disturbance voltage at the MCC. Loa ...

CALCULATION OF VOLT-DROP IN A CIRCUIT CONTAINING AN INDUCTION MOTOR 573 Starting voltage at the busbars = 4181. 8 × 0 .7669 volt ...