Brochure
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7
References
Accessories for Heavy Industrial
NEMA Style Controls 0
Separate enclosures for addition of control
circuit transformer, Control circuit transformers
Separate enclosures for addition of control circuit transformer
The Class 9991 enclosures listed below accept an open-type, Class 8502 or 8536 Type S, NEMA Size 0, 1, 1P or 2 contactor or
starter, together with a fused-control circuit transformer (suffix F4T) to allow field assembly of enclosed controllers. In the cover of the
Class 9991 Type SCG 1 enclosure, knock-outs are provided for field addition of Class 9999 cover-mounted control units. All other
Class 8502 and 8536 enclosures include a panel with space and drilling for an open-type device and a fused control-circuit
transformer. In addition, three closing plates are included in each cover for easy installation of Class 9001 Type K or SK control units.
Oversized enclosures for open-type, Class 8903 Type L and LX and Type S (30 and 60 A), electrically and mechanically held
lighting contactors include a panel with space and drilling for an open-type contactor and fused control-circuit transformer (suffix
F4T) and/or an auxiliary relay for use with single-pole pilot devices (suffix R6). When an auxiliary relay is required, use a Class
8501 Type XO 11 relay. Three closing plates are provided as standard for easy installation of Class 9001 Type K or SK control
units.
Note : a Class 9991 Type SCG 1, NEMA 1 separate enclosure can also be used for Class 8903 Type SMO (30 A) electrically held
lighting contactor if suffix F4T (control transformer), with or without cover control units, is required.
For use with Type NEMA Size or
current rating
Number of
poles
Enclosure type (1) Reference Weight
kg (lb)
Contactors (2) 8502 SAO/SBO/SCO 0, 1 1…5 NEMA 1 9991 SCG 1 3.6 (8)
NEMA 12 9991 SCA 4 8.3 (18.2)
8502 SDO 2 2…5 NEMA 1 9991 SDG 4 9.5 (21)
NEMA 12 9991 SDA 4 10.4 (23)
Starters 8536 SAO/SBO/SCO 0, 1 1…5 NEMA 1 9991 SCG 1 3.6 (8)
NEMA 12 9991 SCA 4 8.3 (18.2)
8536 SDO 2 2…5 NEMA 1 9991 SDG 4 9.5 (21)
NEMA 12 9991 SDA 4 10.4 (23)
Lighting
contactors
8903 LO, 8903 LXO 30 A All NEMA 1 9991 SDG 3 6.8 (15)
NEMA 12 9991 SDA 3 9.1 (20)
8903 SMO 30 A 1…5 NEMA 1 9991 SDG 3 6.8 (15)
NEMA 12 9991 SDA 3 9.1 (20)
8903 SPO 60 A 2…5 NEMA 1 9991 SDG 3 6.8 (15)
NEMA 12 9991 SDA 3 9.1 (20)
Control circuit transformers
For use with Type NEMA Size or
current rating
Number of
poles
Transformer type Reference Weight
kg (lb)
Contactors (2) 8502 SAO/SBO/SCO 0, 1 1…3 Standard, 50 VA 9070 T50 –
Extra capacity, 100 VA 9070 T100 (3) –
Extra capacity, 150 VA 9070 T150 (3) –
4 and 5 Standard, 100 VA 9070 T100 (3) –
Extra capacity, 150 VA 9070 T150 (3) –
8502 SDO 2 2…5 Standard, 100 VA 9070 T100 –
Extra capacity, 150 VA 9070 T150 –
Extra capacity, 300 VA 9070 T300 –
Starters 8536 SAO/SBO/SCO 0, 1 1…3 Standard, 50 VA 9070 T50 –
Extra capacity, 100 VA 9070 T100 (3) –
Extra capacity, 150 VA 9070 T150 (3) –
4 and 5 Standard, 100 VA 9070 T100 (3) –
Extra capacity, 150 VA 9070 T150 (3) –
8536 SDO 2 2…5 Standard, 100 VA 9070 T100 –
Extra capacity, 150 VA 9070 T150 –
Extra capacity, 300 VA 9070 T300 –
Lighting
contactors
8903 LO 30 A All Standard, 50 VA 9070 T50 –
8903 LXO 30 A All Standard, 50 VA 9070 T50 –
Extra capacity, 100 VA 9070 T100 (3) –
Extra capacity, 150 VA 9070 T150 (3) –
8903 SMO 30 A 1…3 Standard, 100 VA 9070 T100 (3) –
Extra capacity, 150 VA 9070 T150 (3) –
4 and 5 Standard, 100 VA 9070 T100 –
Extra capacity, 150 VA 9070 T150 –
Extra capacity, 300 VA 9070 T300 –
8903 SPO 60 A 2…5 Standard, 100 VA 9070 T100 –
Extra capacity, 150 VA 9070 T150 –
Extra capacity, 300 VA
9070 T300 –
(1) NEMA 1: general purpose enclosure. NEMA 12: dust-tight and drip-tight industrial-use enclosure.
(2) For contactors (Class 8502), a separate closing plate is provided with each enclosure to replace the reset mechanism, with the
exception of Class 9991 Type SCG 1, which requires a separate reset closing plate, Class 9999 Type SG2.
(3) For mounting in a 9991 SCG 1 enclosure, a Class 9991 Type S1 adapter bracket is also required.
9991 SCG 1
DF 531389
Dimensions:
pages 7/6 and 7/7