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S260-75-1
7
!
SAFETY
FOR LIFE
SOURCE I
SOURCE II
LOAD
POTENTIAL
SENSING
TRANSFORMERS
POTENTIAL
SENSING
TRANSFORMERS
H.V.
SWITCH
II
H.V.
SWITCH
I
TYPE
S
CONTROL
Figure 2.
Typical Type S control load-transfer scheme.
11"
13 1/2"
1 3/16"
22 5/32"
12 13/16"
8"
16"
5/8" HOLE PROVIDED
FOR CUSTOMER LOCK
MTG HOLES (2) FOR
5/8" MAX BOLT DIA
1 1/2"
20 1/8"
MTG DIM
17 7/8"
GROUNDING
TERMINAL LUG
(14 TO 4 STRANDED)
1 5/8" DIA HOLES
2 1/2" 2 1/2"
2 1/2" 2 1/2"
5 1/4"
1 1/2"
1 1/2"
STD CONTROL
CONTROL WITH FAULT BLOCK
Figure 3.
Outline and mounting dimensions.
Direction of
Transfer
First Switch Transition (Source to
Switch Reaction Time* Time** Source) Type of Transition
VR, VLR, VRV (standard) 2.5 to 3.5 cycles 10 sec (approx) I to II No paralleling of sources
VR, VLR, VRV (standard) 2.5 to 3.5 cycles 10 sec (approx) II to I No paralleling of sources
VR, VLR, VRV (standard) 10 sec (approx) 1.0 to 1.5 cycles II to I Paralleling of sources on return to preferred source
VR, VLR, VRV (quick close) 2.5 to 3.5 cycles 6 to 7 cycles I to II No paralleling of sources
VR, VLR, VRV (quick close) 2.5 to 3.5 cycles 6 to 7 cycles II to I No paralleling of sources
VR, VLR, VRV (quick close) 4.0 to 5.5 cycles 1.0 to 1.5 cycles II to I Paralleling of sources on return to preferred source
TSC 7 to 8 sec 7 to 8 sec I to II No paralleling of sources
TSC 7 to 8 sec 7 to 8 sec II to I No paralleling of sources
TSC 7 to 8 sec 7 to 8 sec II to I Paralleling of sources on return to preferred source
PST-6, PST-9 2.0 to 3.0 cycles 5.0 to 6.0 cycles I to II No paralleling of sources
PST-6, PST-9 2.0 to 3.0 cycles 5.0 to 6.0 cycles II to I No paralleling of sources
PST-6, PST-9 5.0 to 6.0 cycles 2.0 to 3.0 cycles II to I Paralleling of sources on return to preferred source
TABLE 1
Reaction and Transition Times of Cooper Power Systems Motor-Operated Switches
* Time from expiration of time delay to first opening (or closing) of high-voltage switch. Add approximately one cycle to the
values shown to allow for Type S control relay operating time.
** Time-load tap is disconnected or paralleled depending on type of transition used.