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Summary of Contents for Westinghouse CVR-1
- Page 1 Instructions for Type CVR-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...
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Page 2: Table Of Contents
• • • • • • Circuit for Checking and Calibrating the CVR-1 Relay Removed From Case . Typical Damping Factors Versus Gap Setting and Magnet Engagement • • • • Typical Time Delay Versus Step Change in Voltage Level for Type CVR-1 Relay . -
Page 3: General
The type CVR-1 Voltage Regulating Relay is in reality a "control package" designed to control load tap changers. The major com ponents of the CVR-1 relay are an induction disk type voltage sensitive relay, two atL'\: iliary or pilot relays, two motor control re... -
Page 4: Bandwidth And Balance Voltage
120 switch in the tap changer Fig. Schematic Diagram of the CVR-1 closes to energize the 120X relay, which in Relay Voltage Sensing Circuit turn takes over the sealing of the AR relay through its 120X contact and also operates the 120Y slug delayed relay. -
Page 5: Setting The Cvr-1 Relay By Applying An External Voltage
CVR-1 relay will respond to and regulate load center voltage rather than at the tap changer itself. A current trans... - Page 6 1% of desired values are satis Turning the Test Rheostat knob (RH) clock ± factory. wise inserts resistance between the poten tial supply terminals and the CVR-1 sensing For more exact setting a voltmeter of circuit. From this point the procedure is better...
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Page 7: Setting The Cvr-1 Relay W1Th Load Tap Changer Energized
119 volt position. A test voltage adjustment rheostat (RH) is Set the control selector switch on "AUTO" located on a control panel inside the CVR-1 and move the left hand scale pointer until case for your convenience. It makes pos... -
Page 8: Setting The Cvr-1 Relay While Removed From Flexitest Case
L--------- ...J --- _____ CV R -I REL AY Fig. Simplified Control Sche!N!tic with CVR-1 Relay Manually operate the tap changer in Set resistance and reactance com the raise direction until a voltage 2 or 3 pensator dials as required. - Page 9 AL RELAY AR RELAY 120 X RELAY !20 Y RELAY Fig. 6- CVR-1 Relay Removed from Case (Rear View) trol panel) and follow the procedure under nected across 9 and 14 will indicate the "Setting the CVR-1 Relay by Applying an voltage actually applied to the voltage sens...
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Page 10: Time Delay Adjustment
MAGNET MAGNET ASSEM. SWITCH MOUNTING SCREWS BASE Fig. Close-up of CVR-1 Relay Adjustments while lights Ro and Lo indicate operation of Burden of the potential circuit at 120 volts - - - - - - - lOVA the motor control relay contactsAR andAL. -
Page 11: Circuit For Checking And Calibrating The Cvr-1 Relay Removed From Case
SWITCH POSITION CAL. AUTO INDICATES CONTACTS CLOSED Fig. Circuit for Checking and Calibrating the CVR-1 Relay Removed from Case of voltage. For example, any one of the fol Should the conditions be reversed, a lowing conditions contributes a shorter longer time delay is indicated. It is difficult time delay. - Page 12 Page 12 deviations lowers this time band while cor once been lowered, use a reversal of the rection for lesser voltage deviations raises above procedure. the time band. CAUTION: The keeper magnet should never be In some cases where cycling loads or turned down below the 2.4 graduation.
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Page 13: Cvr-1 Relay Control Adjustments
To determine the actual time to close the larger steel panel containing the CVR-1 relay contacts multiply 3 (seconds) relay. These have been touched briefly in (damping factor) 6 seconds actual time an earlier discussion but are not within the delay. -
Page 14: Line Drop Compensator
(RELAY TIME = TIME VALUE MUL T I PL I ED BY DAMPI NG FACTOR FROM FIGURE 9) Fig. 10- Typical Time Delay Versus Step Change in Voltage Level for Type CVR-1 Relay Separate to the load current, through the line drop Line rheostats permit independent setting of the... -
Page 15: Line Drop Compensator Settings
Page 15 in the "direct" position. Reversed reactance resistance per conductor from compensation is obtained by placing it in the unit to load center, in ohms per "reverse" position, which reverses the po mile. larity of the reactance element. inductive reactance per conduc tor from unit to load center, in "Reverse reactance"... -
Page 16: Flexitest Case
In opening the test switches, they should be moved all the way back against Fig. 11 - CVR-1 Relay Control Adjustment Panel the stops. With all the switches fully opened, release the cam action latches and pull the chassis outward. - Page 17 Page 17 1.15 N0.8 1.10 110.6 N0.4 I .05 N0.2 NO.I 1.00 ..� :z;o oc.� Q.. >- "" ::E:<n X UJ 0:=> I ..1 � .. W> <W <>.. w :X:: oc.l- "'->- �..� <n- "'-' - => ..1 % """...
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Page 18: Ammeter Test Plug In Testing Positions
Page 18 (without external connections), or by insert switches (see Figure 16) between terminals ing ten-circuit test plugs S#11640 46. and 12-13 remain closed with the chassis out to prevent open circuiting the current transformers when the current test switches are closed. -
Page 19: Auxiliary Short Circuiting Switch (Enlarged View)
In the event any of the components be come inoperatrve, they may be replaced with renewal parts ordered from the nearest Westinghouse Sales Office or from the Sharon Plant. Should parts be ordered, give Fig. - Page 20 Page 20 ment as stamped on the nameplate, together Trimming Resistor (3000 Ohms .5 with the style number and description of the Watt) - S#184A635H12 parts required as identified in Figure 4 and on the following list. Resistor (Self - Supporting) (4500 Ohms .5 Watt) - S#182A874H01 Relay Complete 8#1962229 Thermistor (Self - Supporting) -...
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