Control_Flippingbook_July 2024

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NEMA FULL VOLTAGE POWER DEVICES, CONTROL SECTION 1

— CR305, CR385 magnetic contactors Factory-installed modifications

Contactor modifications — factory installed The general information at the top of page 1-179, regarding factory-installed modifications, also applies to those listed in the tables below.

Type of installation/ contactors

Item no.

Enclosure type

Modifications Indicating light 1 One (red only) 2

4

Pilot devices mounted in cover or flange of CR305

– 1

4a 4b 4c 4d 4e

One (specify red or green) (heavy-duty, CR104P)

Any Any Any

Two (includes 1 NC auxiliary contact) 4 (heavy-duty, CR104P) One push-to-test and/or transformer type (red or green)

Two Push-to-test (includes 1 NC auxiliary contact) and/or transformer type 4 Any 1 One indicating light: Wired in parallel with operating coil. Two indicating lights: Red is wired in parallel with operating coil, green is wired through an auxiliary contact. 2 Factory-installed field modification kit for sizes 00-4 and size 5 without CPT.

3 Not available in NEMA size 00. Use Size 0 contactor modification. 4 Maximum of three additional auxiliary contacts available on size 0-1.

Type of installation/ contactors Control circuit in CR305

Item no.

Enclosure type

Modifications

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

Any

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

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

Any Any Any

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

DC—standard voltages: 24, 115-125

1 Not available in NEMA size 00. Use size 0 contactor modification. 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 insure compliance. Control circuit fuse kits from page 1-188 may be used to provide primary fusing. Fuses must be sized to meet the requirements of the NEC according to the table below. 3 Not available in NEMA sizes 00 or 0. Use Size 1 contactor modification. 4 24 V coil not available on size 5 and 6.

— Recommended fuse

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