ABB Relion 650 Series Product Manual page 35
Transformer protection
Hide thumbs
Also See for Relion 650 Series:
- Technical manual (754 pages) ,
- Applications manual (382 pages) ,
- Commissioning manual (182 pages)
Table of Contents
Advertisement
Transformer protection RET650
Version 1.1 ANSI
Table 22. Restricted earth fault protection, low impedance REFPDIF (87N)
Function
Operate characteristic
Reset ratio
Base sensitivity function
Directional characteristic, for
zero sequence directional
function
Operate time, trip function
Reset time, trip function
Table 23. 1Ph High impedance differential protection HZPDIF (87)
Function
Operate voltage
Reset ratio
Maximum continuous voltage
Operate time
Reset time
Critical impulse time
ABB Power Grids
Range or value
Adaptable
>95%
(4.0-100.0)% of
IBase
(60 - 90) degrees
25 ms typically at 0 to 10 x
IdMin
30 ms typically at 10 to 0 x
IdMin
© Copyright 2011 ABB Power Grids. All rights reserved
M13062-1 v8
Accuracy
± 1.0% of I
for I < I
n
n
± 1.0% of I for I > I
n
-
± 1.0% of I
n
± 2.0 degree
-
-
M13081-1 v6
Range or value
(20-400) V
I=V/R
>95%
2
/series resistor ≤200 W
V>Pickup
15 ms typically at 0 to 10 x V
90 ms typically at 10 to 0 x V
2 ms typically at 0 to 10 x V
1MRK 504 127-BUS B
Accuracy
± 1.0% of I
n
-
-
-
d
-
d
-
d
35
Advertisement
Table of Contents
