ABB CV-21 Instruction Leaflet Download

Page: 9 / 16

I.L. 41-201.2G

TYPE CV FREQUENCY
COMPENSATED VOLTAGE RELAY

Figure 6: Internal Schematic for Type CV (D.P.S.T.) with Instantaneous Indicating Voltage Attachment in Type FT-11 Case

Sub 1
418251

1/2

TIME DIAL SETTING

TYPICAL TIME CURVES

TYPE CV-1

UNDER VOLTAGE RELAY

60 CYCLES

PERCENT TAP VALUE VOLTAGE

CONDS

160

150

140

130

120

110

100

Summary of Contents for CV-21

Page 1: ... relays operating either on under or over voltage or both These relays frequency compensated such that their pickup between 30 and 90 Hz is within 5 of the value at rated frequency 2 0 CONSTRUCTION AND OPERATION The types CV 21 CV 22 CV 24 CV 25 CV 26 and CV 27 relays consist of a voltage unit an auxiliary telephone type relay and an indicating contactor switch ICS The component parts of the relay...

Page 2: ...JUST CLOSE THE RELAY CON TACTS At this value of voltage the moving contacts will leave the backstop of the time dial and move to close the front contacts Normal operation of the two relays is such that the CV 21 and CV 22 undervoltage relay will open its contacts with application of voltage greater than tap value voltage while the CV 24 and CV 25 overvoltage relay closes its contacts with volt age...

Page 3: ...re circuit breaker reclosing will be initi ated immediately after a trip by the overvoltage con tact the time of the opening of the contacts should be a minimum This condition is obtained by loosen ing the stationary contact mounting screw removing the contact plate and then replacing the plate with the bent end resting against the contact spring For double trip relays the upper stationary contact...

Page 4: ...ap value voltage minus 3 a CV 24 and CV 25 overvoltage relays CV 26 and CV 27 over or undervoltage relays The moving contact should leave the backstop at tap value voltage plus 3 and should return to the back stop at tap value voltage minus 3 b CV 21 and CV 22 undervoltage relays The mov ing contact should leave the backstop at tap value voltage minus 3 and should return to the backstop at tap val...

Page 5: ...meter reads tap value volt age or higher Close switch S and adjust resis tor B until the voltmeter reads 40 percent of tap value voltage Open switch S and allow the moving contact to move to the backstop of the time dial Close switch S and measure operat ing time Adjust the permanent magnet gap until the oper ating time corresponds to the value given in Table B b CV 24 and CV 25 overcurrent relay ...

Page 6: ...omers who are equipped for doing repair work When ordering parts always give the complete nameplate data Figure 1 Internal Schematic for the Type CV S P S T Voltage Relay in the FT 11 Case Figure 2 Internal Schematic for the Type CV D P S T Voltage Relay in the FT 11 Case Sub 1 185A133 Sub 1 185A134 Sub 1 185A135 Figure 3 Internal Schematic for the Type CV S P D T Voltage Relay in the FT 11 Case ...

Page 7: ...I L 41 201 2G 7 TYPE CV FREQUENCY COMPENSATED VOLTAGE RELAY Figure 4 Internal Schematic for the Type CV S P D T Voltage Relay in the FT 11 Case Sub 1 187A998 ...

Page 8: ...I L 41 201 2G 8 TYPE CV FREQUENCY COMPENSATED VOLTAGE RELAY Figure 5 Internal Schematic for Type CV S P S T with Instantaneous Indicating Voltage Attachment in Type FT 11 Case Sub 1 187A994 ...

Page 9: ...ith Instantaneous Indicating Voltage Attachment in Type FT 11 Case Sub 1 418251 11 10 9 8 7 6 5 4 3 2 1 1 2 TIME DIAL SETTING TYPICAL TIME CURVES TYPE CV 1 UNDER VOLTAGE RELAY 60 CYCLES PERCENT TAP VALUE VOLTAGE SECONDS 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 0 10 20 30 40 50 60 70 80 90 100 ...

Page 10: ... the Type CV 21 Long Time Undervoltage Relay Sub 1 418250 TIME DIAL SETTING 11 10 9 8 7 6 5 4 3 2 11 10 9 8 7 6 5 4 3 2 1 1 2 TYPICAL TIME CURVES TYPE CV 2 UNDER VOLTAGE RELAY 60 CYCLES 2 3 4 5 6 7 8 9 10 11 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 SECONDS 0 10 20 30 40 50 60 70 80 90 100 ...

Page 11: ...AGE RELAY Figure 8 Typical Time Curves of the Type CV 22 Short Time Undervoltage Relay Sub 2 406C881 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 seconds 0 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 Percent Tap Value Voltage ...

Page 12: ...s of the Type CV 24 Long Time Overcurrent Relay Sub 2 406C884 Typical Time Curves Type CV 5 or CV 25 Overvoltage Relay 50 60 Hertz 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 seconds 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 Percent Tap Value Voltage ...

Page 13: ... COMPENSATED VOLTAGE RELAY Figure 10 Typical Time Curves of the Type CV 25 Short Time Overvoltage Relay Sub 2 406C882 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 Percent Tap Value Voltage ...

Page 14: ...ub 2 406C883 11 10 9 8 7 6 5 4 3 2 1 1 2 seconds Time Dial Setting 11 10 9 8 7 6 5 4 3 2 1 1 2 300 0 150 10 20 30 40 50 60 70 80 90 100 110 120 130 140 160 170 180 190 200 210 220 230 240 250 260 270 280 290 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 TYPICAL TIME CURVE TYPE CV 7 OR CV 27 OVER UNDER VOLTAGE RELAY 50 60 HERTZ Percent Tap Value Voltage ...

Page 15: ...I L 41 201 2G 15 TYPE CV FREQUENCY COMPENSATED VOLTAGE RELAY Figure 12 Typical Time Curves of the Type CV 27 Short Time Over and Undervoltage Relay Sub 2 183A023 Sub 2 183A024 ...

Page 16: ... VOLTAGE RELAY Sub 20 57D7900 Figure 13 Diagram of Test Connections for Type CV Undervoltage Relays Printed in U S A ABB Power T D Company Inc 4300 Coral Ridge Drive Coral Springs Florida 33065 TEL 954 752 6700 FAX 954 345 5329 ABB Network Partner ...

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