ABB SC - Figure 5: Internal Wiring of the Relays in the Small Glass Case; Figure 6: Internal Schematic of the Single Unit Type SC or SC-1 Relay in the Type FT-21 Case; Figure 7: Internal Schematic of the Double Unit Type SC or SC-1 Relay in the Type FT-21 Case; Figure 8: Internal Wiring of the Relays in the Small Glass Case

SC, SC-1, SV and SV-1 Relay I.L. 41-766.1N
9
Sub 1
182A857
Contacts - Either
Make or Break
As Required
Left-hand Unit
(Front View)
Right-hand Unit
(Front View)
Red Handle
Test Switch
Terminal
TYPE OF UNIT
LOCATION OF EACH UNIT
RIGHT HAND
LEFT HAND
SAME TYPE
(SV, SV1)
SAME TYPE
BUT DC & AC
LOWER RATING
UNIT
HIGHER RATING
UNIT
DC AC
ARRANGEMENT OF UNITS
Sub 5
183A193
Note: When SC or SC-1 Coil
Ratings are Different - The
Lower Rated Current Element
To Be Assembled in Bottom
Position of Relay.
Contacts - Either
Make or Break
As Required
Bottom Unit
Top RH Unit
(Front View)
Top LH Unit
(Front View)
Chassis Operated
Shorting Switch
Test Switch
Current Test Jack
Terminal
Note: Coils tapped for
1 to 25 Ratio Range
(when used)
Figure 5: Internal Wiring of the Relays in the Small
Glass Case
Figure 6: Internal Schematic of the Single Unit Type SC
or SC-1 Relay in the Type FT-21 Case
Figure 7: Internal Schematic of the Double Unit Type SC
or SC-1 Relay in the Type FT-21 Case
Sub 2
183A192
CONTACTS - EITHER
MAKE OR BREAK AS
REQUIRED
BOTTOM UNIT
TOP LEFT-HAND UNIT
(FRONT VIEW)
TOP RIGHT-HAND UNIT
(FRONT VIEW)
TERMINAL
TEST SWITCH
*Sub 7
871766
Figure 8: Internal Wiring of the Relays in the Small
Glass Case
*
Denotes Change