ABB CVQ Instruction Leaflet Download Page 12 | Manualshive

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ABB CVQ Instruction Leaflet Download Page 12

41-223N

CVQ Relay

12

Figure 7. Polar Unit - permanent magnet flux paths

183A062

N

N

S

S

N

N

S

S

Moving Contact

Armature

Permanent
Magnet

BALANCED AIR GAPS

UNBALANCED AIR GAPS

N

Additional
Flux Path

Shunt

Sub 5

Figure 8. CVQ Relay without Case (Front View)

Sub 1

9664A46

Polar Unit

Time Dial

Front Contact

Resistor for
Filter Calibration

Shunt

Terminal
Plate

CV Unit

ICS

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10
11
12
13
14
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Summary of Contents for CVQ

Page 1: ...r starting current For most induction motors this will produce approximately 6 negative sequence voltage even if single phasing occurs at no load because of the effect of the magnetizing require ment of the motor If static i e non motor load is single phased with a motor or group of motors the negative sequence volt age will be greater than the value calculated above Single phasing of a predominat...

Page 2: ...41 223N CVQ Relay 2 Figure 1 Internal Schematic of the Type CVQ Relay Figure 2 Internal Schematic of Type CVQ Relay with Telephone Relay 880A343 Sub 2 188A644 Sub 4 ...

Page 3: ...he Internal Schematic of Figure 2 page 2 3 0 CHARACTERISTICS Polar Unit The sensitivity of the negative sequence portion of the relay is adjustable between 5 and 10 percent of the rated line to neutral voltage Voltage Unit Tap value voltage is the value at which the overvoltage front contact left hand front view closes The undervoltage back contact right hand front view will close within 5 of this...

Page 4: ...ariations for which trip ping is not desired 5 4 NEGATIVE SEQUENCE FILTER No setting required 5 5 INDICATING CONTACTOR SWITCH ICS The only setting required on the ICS unit is the selection of the 0 2 or 2 0 ampere tap setting This selection is made by connecting the lead located in the front of the tap block to the desired setting by means of the connecting screw The 0 2 ampere setting is recommen...

Page 5: ...ied with a T located at lower left of stationary contact block the index on the movement frame will coincide with the 0 mark on the time dial when the stationary contact has moved through approximately one half of its nor mal deflection Therefore with the stationary contact resting against the backstop the index mark is offset to the right of the 0 mark by approximately 020 For the CV 7 element th...

Page 6: ... moving contact Place gage between contact and the stationary contact on the left hand side of the polar unit and adjust stationary contacts for 0 046 inches Bring up the stationary contact until it just makes with the gage and lock in place On dou ble trip relays adjust the other set of contact gaps to close simultaneously 8 2 2 Minimum Trip Voltage Short out the adjustable resistor in series wit...

Page 7: ...approximately one half of its normal deflection Therefore with the stationary contact resting against the backstop the index mark is offset to the right of the 0 mark by approximately 020 For the type CV 7 relays the follow on the back contact should be approxi mately 1 64 The placement of the various time dial positions in line with the index mark will give operating times as shown on the respect...

Page 8: ...41 223N CVQ Relay 8 Figure 3 Typical 60 hertz Time Curves of the CV 7 Unit of the Type CVQ Relay Curve 406C883 Sub 2 ...

Page 9: ...CVQ Relay 41 223N 9 Figure 4 External Schematic of the type CVQ Relay used in Motor Protection For Internal Schematic 188A644 Figure 1 762A868 Sub 5 ...

Page 10: ...41 223N CVQ Relay 10 Figure 5 External Schematic of the CVQ Relay used for Tripping on Negative Sequence Voltage only For Internal Schematic 880A343 Figure 2 880A380 Sub 5 ...

Page 11: ...120V 3 WITH A B C PHASE ROTATION REPRESENTED BY TRIANGLE ABC RELAY TEST VOLTAGE IS REPRESENTED BY TRIANGLE XBC PHASOR DIAGRAM FOR TEST CONDITION 1 2 3 4 5 6 7 8 9 10 A B C V VARIABLE AUTO TRANSFORMER 120V 3 A B C ROTATION TYPE CVQ RELAY FRONT VIEW V AX 3 TIMES NEGATIVE SEQUENCE VOLTAGE V 2 V 2 V AX x 3 ...

Page 12: ...S S N N S S Moving Contact Armature Permanent Magnet BALANCED AIR GAPS UNBALANCED AIR GAPS N Additional Flux Path Shunt Sub 5 Figure 8 CVQ Relay without Case Front View Sub 1 9664A46 Polar Unit Time Dial Front Contact Resistor for Filter Calibration Shunt Terminal Plate CV Unit ICS ...

Page 13: ...CVQ Relay 41 223N 13 Reserved for Notes ...

Page 14: ...41 223N CVQ Relay 14 Reserved for Notes ...

Page 15: ...CVQ Relay 41 223N 15 Reserved for Notes ...

Page 16: ... ABB Automation Inc 4300 Coral Ridge Drive Coral Springs Florida 33065 TEL 954 752 6700 FAX 954 345 5329 ABB 41 223N CVQ Relay 57D7902 Sub 17 Figure 9 Outline and Drilling plan for the Type CVQ Relay in Type FT 31 Case ...

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