ABB RET670 - Function test modes

Table 70. Fuse failure supervision VDSPVC
Function Range or value Accuracy
Operate value, block of main fuse
failure
(10.0-80.0)% of UBase ±0.5% of Ur
Reset ratio <110%
Operate time, block of main fuse
failure at 1 to 0 x U
r
Min. = 5 ms –
Max. = 15 ms
Reset time, block of main fuse
failure at 0 to 1 x U
r
Min. = 15 ms –
Max. = 30 ms
Operate value, alarm for pilot fuse
failure
(10.0-80.0)% of UBase ±0.5% of Ur
Reset ratio <110% –
Operate time, alarm for pilot fuse
failure at 1 to 0 x U
r
Min. = 5 ms –
Max. = 15 ms
Reset time, alarm for pilot fuse
failure at 0 to 1 x U
r
Min. = 15 ms –
Max. = 30 ms
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
ABB 81