Nidec Leroy-Somer R450 M Installation And Maintenance Manual

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Nidec Leroy-Somer R450 M Installation And Maintenance Manual Manual pdf 8 page image

2019.03 / kElectric Power Generation8Installation and maintenanceR450M&T AVR4342 en -3 - TECHNICAL CHARACTERISTICS3.1 - Electrical characteristics- Maximum power supply: 150V - 50/60 Hz- Rated overload current: 10 A - 10 s- Electronic protection:- in the case of a short-circuit, the excitationcurrent is reduced to a value less than 1Aafter 10 s- in the event of loss of voltage reference,the excitation current is reduced to a valueless than 1A after 1s for AREP/SHUNT, 10 sfor PMG- in the event of overexcitation, the currentis reduced as indicated in the next diagram(see 3.2.1.4)- Fast acting fuses: F1 on X1 and F2 on Z210A, 250V- Voltage sensingR450 M: single-phase connection to V andW. “80V-320V” or “320V-530V” according tothe rotating switch position.R450 T: three-phase connection to U, V andW. “80V-320V” or “320V-530V” according tothe rotating switch position.For other voltages, a transformer should beused (or two for R450 T).- Voltage regulation:± 0.5%- Current sensing: (parallel operation): inputS1, S2 intended for 1 C.T. > 2.5 VA cl1,secondary 1 A or 5 A3.2 - Configurations3.2.1 - Settings3.2.1.1 - VoltageVoltage adjustment via potentiometer P1 inthe ranges described in the table below:For 50 and 60 Hz Max.High range Un ≤ 530 VMedium range Un ≤ 252 VWARNINGThe allowed adjustment range is ±5%;when the setting exceeds these limits,please check that it is conform with thepower table.3.2.1.2 - Quadrature droop:Quadrature droop adjustment viapotentiometer P4 within a range :- from 0 to 8% with a PF=0.8 for 400Vapplications.- From 0 to 14% with a PF=0.8 for 240Vapplications.- From 0 to 8% for 110V applications with astep-up transformer (ratio of 4) placed onthe voltage reference.The potentiometer P4 has a non linearresponse. Then, when a 1A secondary CT isconnected the effective range starts fromthe the second 1/3 of P4 range and in thecase of a 5A secondary CT the effectiverange starts from the first 1/3.When a 5A CT is used, the adjustment rangeis higher, so P4 must be set to the first 1/4(anti-clockwise) and then progressivelyincrease it.WARNINGThe CT must be connected.3.2.1.3 - Stability:Stability adjustment via potentiometer P2.Selection of rotating switch according to themachine type and the response time asindicated in paragraph 3.2.3.3.2.1.4 - Excitation limitation:Excitation limitation adjustment viapotentiometer P3 as described below.The excitation current limitation threshold insteady state is set by a potentiometer at110% of the rated value. The adjustment ismade by the operator during the on-load testat rated power by tuning the potentiometer.When the excitation current exceeds thisvalue, a counter is activated at the speed ofone record per second for 90 s. When thistime is elapsed, the current is reduced to thevalue of the rated excitation current. If in themeantime the excitation current dropsbelow the threshold value, the countercounts down at the same speed.