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41-337.31 C

6

current can best be determined with the permanent
magnet removed.

Adjust the spring tension until t he relay just closes its
contacts with the following current applied to termi-
nals 12 and 13 of the relay.

CA-16

0.15 amperes

7.3.

Percentage Slope Characteristic

Connect the relay per the test circuit of Figure 8.

Pass 20 amperes for the CA-16 relay into terminals 9
and 19 of the relay. Adjust the plug (when used) in
the operating electromagnet until the contacts just
close with the following currents into the operating
circuit of the relays.

CA-16

29.4 to 34 amperes

7.4.

Time Curve

Place the permanent magnet on the relay and apply 20
amperes to terminals 12 and 13 of the relay. Adjust the
keeper of the permanent magnet until the contacts just
close in the following times:

CA-16

58 to 68 Milliseconds

These times should be the average of 5 readings.

7.5.

Indicating Contactor Switch (ICS)

Initially adjust unit on the pedestal so that armature fin-
gers do not touch the yoke in the reset position.
(Viewed from top of switch between cover and frame).
This can be done by loosening the mounting screw in
the molded pedestal and moving the ICS in the down-
ward position.

a.

Contact Wipe – Adjust the stationary contact so
that both stationary contacts make with the moving
contacts simultaneously and wipe 1/64” to 3/64”
when the armature is against the core.

b.

Target – Manually raise the moving contacts and
check to see that the target drops at the same
time as the contacts make or 1/16” ahead. The
cover may be removed and the tab holding the
target reformed slightly if necessary. However,
care should be exercised so that the target will

not drop with a slight jar.

If the pickup is low, the front cover must be removed
and the leaf springs on each side bent outward
equally.

7.6.

Sensitive Fault Detector

Loosen the lock nut at the top of the element and run
the core screw down until it is flush with the top of the
lock nut. Back off the Micarta disc by loosening the
two lock nuts. Apply 0.15 amperes to terminals 14
and 15. Operate the moving element by hand and
allow the current to hold the moving contact disc
against the stationary contacts. Now, screw up the
core screw slowly. This causes the plunger to move
up, compressing the spring until a point of maximum
deflection is reached. Further upward motion will
cause the plunger to drop part way out of the coil,
thus diminishing the spring pressure on the contacts.
By thus adjusting the core screw up or down the
maximum spring deflection for this value of current
may be found.

Then lock the core screw in place. Next, adjust the
de-energized position of the plunger by raising the
Micarta disc until the plunger just picks up electrically
at the 0.15 ampere value.

7.7.

Electrical Checkpoints

Figures 9 and 10 will aid in trouble shooting the
CA-16. These curves show the operating current to
trip the relay for different restraint current for one
restraint element as well as for six restraint elements
connected in series.

8.0

RENEWAL PARTS

Repair work can be done most satisfactorily at the
factory. However, interchangeable parts can be fur-
nished to customers who are equipped for doing
repair work. When ordering parts, always give the
complete nameplate data.

Summary of Contents for CA-16

Page 1: ......

Page 2: ...41 337 31 C 2 Figure 1 CA 16 Front View Figure 2 CA 16 Rear View ...

Page 3: ...ed from causing contact bouncing A micarta disc is fastened to the bottom of the guide rod by two small nuts Its position determines the pick up current of the ele ment The auto transformer is designed to saturate at high values of current to limit the amount of current to the contactor switch 2 3 1 Indicating Contactor Switch Unit ICS The dc indicating contactor switch is a small clapper type dev...

Page 4: ...g the lead located in front of the tap block to the desired setting by means of a screw connection 4 2 Trip Circuit Constants Indicating Contactor Switch ICS 0 2 amp rating 8 5 ohms dc 1 0 amp rating 0 37 ohms dc 2 0 amp rating 0 10 ohms dc ENERGY REQUIREMENTS Burden of each restraint coil at 5 amperes VOLT AMPERES POWER FACTOR 75 7 Continuous Rating 14 amperes 1 second rating 460 amperes Burden o...

Page 5: ...onnec tions of Figure 8 CA 16 17 0 amperes 7 Check each individual restraint winding by applying 50 amperes to each winding Apply sufficient operat ing current to the operating circuit until the contacts just close The operating current should be CA 16 3 9 to 5 1 amperes C Time Curve Apply 20 amperes to terminals 12 and 13 of the relays The contacts should close in the following times CA 16 58 to ...

Page 6: ... may be removed and the tab holding the target reformed slightly if necessary However care should be exercised so that the target will not drop with a slight jar If the pickup is low the front cover must be removed and the leaf springs on each side bent outward equally 7 6 Sensitive Fault Detector Loosen the lock nut at the top of the element and run the core screw down until it is flush with the ...

Page 7: ...41 337 31 C 7 Figure 3 Internal Schematic of the Type CA 16 Bus Relay Sub 1 3532A95 ...

Page 8: ...41 337 31 C 8 Figure 4 Typical Time Curves of the CA 16 Differential Relay Sub 1 537956 ...

Page 9: ...41 337 31 C 9 Figure 5 Typical Burden Characteristics of the Types CA 16 and CA 26 Relays Curve 537957 ...

Page 10: ...41 337 31 C 10 Figure 6 External Schematic of One Set of Type CA 16 Relays for the Protection of a Three and Four Circuit Bus Sub 5 187A424 ...

Page 11: ...41 337 31 C 11 Figure 7 External Schematic of the Type CA 16 Relays for Protection of Six Circuit Bus with Three Feeder Groups Sub 5 187A425 ...

Page 12: ...41 337 31 C 12 Figure 8 Diagram of Test Connections for the CA 16 Relay Sub 4 187A426 ...

Page 13: ...41 337 31 C 13 Figure 9 Percentage Slope Curve of the CA 16 Relay with One Restraint Winding Sub 1 849A450 ...

Page 14: ...41 337 31 C 14 Figure 10 Percentage Slope Curve of the CA 16 Relay with Six Restraint Windings in Series Sub 2 849A343 ...

Page 15: ......

Page 16: ...ABB Inc 4300 Coral Ridge Drive Coral Springs Florida 33065 Telephone 1 954 752 6700 Fax 1 954 345 5329 www abb com substation automation IL 41 337 31 Revision C ABB ...

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