SE Digest 178

Industrial Relays

CA2SK, CA3SK, and CA2SKE

Refer to Catalog 8501CT0101

www.se.com/us

TeSys™ SK IEC Style Control Relays

• Miniature size saves space.

• Up to 4 poles.

• Mounts on 35 mm DIN 3 track. Table 23.111: IEC Style Industrial Control Relays Control Circuit Supply Consumption Type of Termination

Contact Configuration Catalog Number [20] N.O. N.C.

1 2 1 2

1 0 1 0

CA2SK11 • • CA2SK20 • • CA3SK11 • • CA3SK20 • •

AC

4.2VA

Screw clamp

DC

2.2W

Table 23.112: Contact Adder Decks (for CA2SK20 only) Type of Termination Contact Configuration

CA2SK11G7

Catalog Number

N.O.

N.C.

2 1 0

0 1 2

LA1SK20 LA1SK11 LA1SK02

Screw clamp

Transient Suppressor Module dampens the voltage spike that may occur when the relay coil is de-energized. The spike may adversely affect solid state equipment near the relay. The transient suppressor module snaps into a cavity located in the side of the relay. These modules can be used with CA2SK and CA3SK relays. Table 23.113: Transient Suppressor Module Control Circuit Voltage Catalog Number 24–48 Vac 50/60 Hz, 24–48 Vdc LA4SKEIE 110–250 Vac 50/60 Hz, 110–250 Vdc LA4SKEIU Table 23.114: Coil Voltage Codes for Control Relays Voltage 12 24 36 48 72 110 120 220 230 240 277 380 400 480 50/60Hz — B7 [21] — E7 [21] — F7 G7 [21] M7 [21] P7 U7 [21] UE7 Q7 V7 T7 [21] DC JDBDCDEDSD— — — — — — — — — IEC Style Alternating Relays are used to alternate the use of 2 motor circuits. When the coil is energized the first time, one contact closes and will open when the coil is de energized. When the coil is energized again, the other contact will close and will open when the coil is de-energized. The contacts from these alternators are to be used in the control circuit of the starters that are controlling pump or compressor motors. Table 23.115: Alternating Relays CA2SKE20• • [22] Table 23.116: Contact Ratings for CA2SK, CA3SK, and CA2SKE20 Relays AC DC V Inductive 35% PF Resistive 75% PF V Continuous Amperes Make Coil Voltage (Voltage-Hz) Type 24–50/60

23 RELAYS AND TIMERS

LA1SK11

CA2SKE20

NEMA Rating

Break Continuous Amperes

Make, Break and Continuos Amperes

A VA A VA

120 240 480 600

60 30 15 12

6 3

24 60

3 2

A600

7200

720

10

10

1.5 1.2

110 240

0.8 0.2

Approximate Dimensions for CA2SKE Relay

#8 or

1 .06 2 7

2. 1 9 56

.20 5

(4) .1 6

4 mm

(49) 1. 9 3

( 5 8 ) 2 . 2 8

2.20 56

( 3 4 . 5 ) 1.3 6

( 6 8 ) 2 . 6 8

(4 5 ) 1. 77

. 1 4 4

Dual Dime nsions: INCHES Millimeters

Approvals for TeSys SK IEC Style Relays

[20] Use the appropriate voltage code from Table 23.114 to complete the catalog number. For example, CA2SK11 G7 . [21] Alternating relays CA2SKE available in these voltages only. No other voltages are available. [22] Use the appropriate voltage code from Table 23.114 to complete the catalog number (for example, CAZSK11 G7 ). Only available with voltages indicated in this table.

23-93

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