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Содержание CVR-1

Страница 1: ...1 Voltage Regulating Relay Westinghouse Electric Corporation Power Transformer Division Sharon Pa I B 47 065 9A Elfecci e NoYember 1962 Supersedes I B 47 065 9 March 1961 w w w E l e c t r i c a l P...

Страница 2: ...Simplified Control Schematic With CVR 1 Relay 6 CVR 1 Removed From Case Rear View 7 Closeup of CVR 1 Relay Adjustments 8 Circuit for Checking and Calibrating the CVR 1 Relay Removed From Case 9 Typic...

Страница 3: ...romagnet and clean them if any foreign material is present Operate the relay to check the settings and electrical connections Operation The sensing element of the CVR 1 relay is an induction disk volt...

Страница 4: ...cing contact has opened a cam operated 120 switch in the tap changer closes to energize the 120X relay which in turn takes over the sealing of the AR relay through its 120X contact and also operates t...

Страница 5: ...d By thus circulating current pro portional to the load through resistance and reactance elements an impedance voltage is produced which is combined with the control voltage to match the relation betw...

Страница 6: ...TT2 as shown in Figure 5 It is convenient to apply an ex ternal variable voltage source to PTT1 and PTT2 reading on the voltmeter the voltage at which the 90R and 90L contacts close If desired a const...

Страница 7: ...g contact operating the tap changer in the lower direction 5 The CVR 1 relay is now set to hold regulated output between the limits of 119 and 121 volts or at a nominal 120 volt level Page 7 balance v...

Страница 8: ...heostat for the de sired value of the 90L setting and again after 60 seconds set the control selector on AUTO Move the 90L stationary contact until it picks up the motor control relay 5 Refer to Time...

Страница 9: ...sk of the CVR 1 relay If desired a constant voltage may be applied at points 6 and 9 with the Test Rheostat being used to obtain a variable voltage A voltmeter con nected across 9 and 14 will indicate...

Страница 10: ...te closing of the raise and lower pushbuttons Ro and Lo still indicate operation ofAR and AL contacts General operating data for the relay on 60 cycles is as follows Burden of the potential circuit at...

Страница 11: ...OSED Fig 8 Circuit for Checking and Calibrating the CVR 1 Relay Removed from Case of voltage For example any one of the fol lowing conditions contributes to a shorter time delay 1 A lower damping fact...

Страница 12: ...wn in Figure 7 This is done by loosening the four magnet assembly mounting screws See Figure 7 and sliding the magnet assembly to its new position A magnet time multiplier scale is attached to the per...

Страница 13: ...front of the relay with the cover removed The adjustments for resistance and reactance compensation the switch for reversing the polarity of the reactance compensation and the Test Rheo stat are all...

Страница 14: ...ation is available only when the main current transformer is delivering a full 5 amperes to the tap changer control An auxiliary current transformer ACT steps this current down from 5 amperes to the 2...

Страница 15: ...sation N c T 5 X X RL X d X n N POT Dial Setting for Reactance Compensation N 5 x C T x XL x d x n N POT Where N c T main current transformer ratio primary current secondary current N POT potential tr...

Страница 16: ...e completed through the closed knife blades The case designation is type FT 32 REMOVING CHASSIS To remove the chassis first remove the cover by unscrewing the captive thumb nut at the bottom and lifti...

Страница 17: ...v v L 3 4 5 6 7 8 9 10 12 EQUIVALENT CONDUCTOR SPACING FEET v v v v c 300 000 CM 5001000 CM I 0001000 CM 16 20 30 EQUIVALENT CONDUCTOR SPACING D OF UNSYMMETRICAL THREE PHASE LINES IS GIVEii BY THE EXP...

Страница 18: ...ugh the current test jack jaws This circuit can be isolated by inserting an ammeter test plug S ll640 47 SWITCH BLADE JAW CLIP LEAD LUG AMMETER TEST PlUG SWITCH BLADE HINGE Fig 14 Ammeter Test Plug in...

Страница 19: ...sition An internal schematic for the relay is shown in Figure 3 Maintenance The proper adjustments to insure correct operation of this relay have been made at the factory and should not be disturbed a...

Страница 20: ...ounding Resistors 3000 Ohms 25 Watt 8 1202954 Resistor 6 Ohms 25 Watt S 04D1298H84 Trimming Resistor 3000 Ohms 5 Watt S 184A635H12 Resistor Self Supporting 4500 Ohms 5 Watt S 182A874H01 Thermistor Sel...

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