Control_Flippingbook_July 2024

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NEMA FULL VOLTAGE POWER DEVICES, CONTROL SECTION 1

— CR306, CR307, CR308, CR309, CR310, CR311, CR387, CR390, CR407, CR408, CR410, CR411, CR487, CR490 magnetic starters Factory-installed modifications

Starter modifications—factory installed The general information at the top of page 1-109, regarding factory-installed modifications, also applies to those listed in the table below.

Type of installation/starters Pilot devices mounted in cover or flange of CR309, CR410, CR411, CR490

Item no.

Modifications

Enclosure type

7

Indicating lights (specify color) 1

–

7a 7b 7c 7d

Two

Any Any Any Any Any

Three

Two push-to-test Three push-to-test

8

Separate control circuit (specify voltage and frequency, reference items 13a and 13b for standard voltages)

Control circuit in CR306, CR307, CR308, CR309, CR310, CR311, CR387, CR390, CR407, CR408, CR410, CR411, CR487, CR490

9

Fused control circuit—two fuses

Any Any

10

Control transformer—standard capacity, 50 or 60 Hz 2 two primary and one fuse secondary, (specify voltage rating) standard voltages at 60 Hz:

220–230–240 primary, 110–115–120 secondary 440–460–480 primary, 110–115–120 secondary 550–575–600 primary, 110–115–120 secondary 200–208 primary, 115–120 secondary Control transformer — 100 VA additional capacity, 60 Hz

11 12 13

Any

–

Operating coil

13a 4 13b 13d 3

Standard voltages at 60 Hz: 24, 115–120, 200–208, 230–240, 460–480, 575–600

Any Any

Standard voltages at 50 Hz: 110, 220, 380-415, 440, 550

DC—standard voltages: 24, 115–125 Any 1 Two indicating lights have each one wired in parallel with each operating coil. (Both red or red/amber or red/green.) Three lights have one wired in parallel with each operating coil with the third one wired through two normally closed auxiliary contacts. (Both red or red/amber, with green "OFF.") 2 The National Electrical Code, Article 450-3(B), requires primary fuses in most typical installations. Refer to the NEC, Article 450 prior to ordering control transformer without primary fuses to ensure compliance. Control circuit fuse kits from page 1-123 may be used to provide primary fusing. Fuses must be sized to meet the requirements of the NEC according to the "Recommended Fuse" table.

3 Available in CR305 contactor forms. 4 24 V coil not available on size 5 and 6. Control circuit fusing

— Recommended fuse

Per the NEC and UL508 Section 18.2 — control circuit fuses must be used when the branch circuit protective device rating is too large to serve as protection for the control circuit. This depends on the control wire size and whether all control circuit wires are within the enclosure. See table below:

Primary voltage

CPT VA

208/240

480

600

50

1 2 3 5 6

0.5

0.5

100 150 250 300

1

0.75

1.5

1 2 2

2 3

Provide supplemental control circuit protection if control circuits with wires longer than 12 inches are connected to branch circuit protection exceeding the ratings below

Non-combination starters (CR305, CR306, CR309, CR385, CR386) • Size 4 and above Combination starters • Size 0-3 with mag-break protector size 3 with: - Circuit breaker greater than 100 amps, or - Fuse clips greater than 100 amps, or size 4 and above with any circuit breakers, circuit protector or fuse clips. Control circuit fuses (modification 9) must be added to the enclosed starter or contactor pricing. All CPTs will be supplied with primary fuses. CPTs without primary fuses are no longer available. When control circuit fuses are not factory supplied, customer provided wiring or branch circuit protection sizing to these contactors and starters may still require that the customer/installer add the fusing in the field. It will be the customer/installer’s responsibility to ensure code compliance under these conditions.

Maximum supplemental control circuit protection rating (amperes)

Maximum branch circuit protection rating (amperes)

Conductors within enclosure

Conductors outside enclosure

Control circuit wire size (AWG)

22 20 18 16 14 12

12 20 25 40

3 5 7

3 5 7

10 45 60

10 20 25

100 120

The factory must provide this protection, if the circuit provided by the factory requires the fuses. The factory will provide control circuit fuses in enclosed starters and contactors with pilot devices, control relays or other control components that are factory wired; when used with line voltage control; when the size listed below is being supplied.