ABB RET670 Product Manual page 69

ABB
Transformer protection RET670
Pre-configured
Product version: 1.1
Table 51. General current and voltage protection (GAPC), continued
Function
Voltage level where voltage
memory takes over
Start overvoltage, step 1 and 2 (2.0 - 200.0)% of U
Start undervoltage, step 1
and 2
Operate time, start
overvoltage
Reset time, start overvoltage
Operate time start
undervoltage
Reset time start undervoltage
High and low voltage limit,
voltage dependent operation
Directional function
Relay characteristic angle
Relay operate angle
Reset ratio, overcurrent
Reset ratio, undercurrent
Reset ratio, overvoltage
Reset ratio, undervoltage
Overcurrent:
Critical impulse time
Impulse margin time
Undercurrent:
Critical impulse time
Impulse margin time
Overvoltage:
Critical impulse time
Impulse margin time
Range or value
(0.0 - 5.0)% of U
base
base
(2.0 - 150.0)% of U
base
25 ms typically at 0 to 2 x U
25 ms typically at 2 to 0 x U
25 ms typically 2 to 0 x U
25 ms typically at 0 to 2 x U
(1.0 - 200.0)% of U
base
Settable: NonDir, forward and
reverse
(-180 to +180) degrees
(1 to 90) degrees
> 95%
< 105%
> 95%
< 105%
10 ms typically at 0 to 2 x I
15 ms typically
10 ms typically at 2 to 0 x I
15 ms typically
10 ms typically at 0 to 2 x U
15 ms typically
1MRK 504 091-BEN B
Issued: June 2010
Accuracy
± 1.0% of U
r
± 1.0% of U for U<U
r
± 1.0% of U for U>U
± 1.0% of U for U<U
r
± 1.0% of U for U>U
-
set
-
set
-
set
-
set
± 1.0% of U for U<U
r
± 1.0% of U for U>U
-
± 2.0 degrees
± 2.0 degrees
-
-
-
-
-
set
-
-
set
-
-
set
-
r
r
r
r
r
r
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