ABB RET670 Product Manual page 64

Transformer protection RET670
Pre-configured
Product version: 1.1
Table 41. Directional overpower protection GOPPDOP
Function
Power level
Characteristic angle
Timers
Table 42. Broken conductor check BRCPTOC
Function
Minimum phase current
for operation
Unbalance current
operation
Timer
Voltage protection
Table 43. Two step undervoltage protection UV2PTUV
Function
Operate voltage, low and
high step
Absolute hysteresis
Internal blocking level, low
and high step
Inverse time characteristics
for low and high step, see
table 92
Definite time delays
Minimum operate time,
inverse characteristics
Operate time, start function
Reset time, start function
Critical impulse time
Impulse margin time
64
Range or value
(0.0–500.0)% of S
base
At low setting:
(0.5-2.0)% of S
base
(2.0-10)% of S
base
(-180.0–180.0) degrees
(0.00-6000.00) s
Range or value
(5–100)% of IBase
(0–100)% of maximum
current
(0.00-6000.00) s
Range or value
(1–100)% of UBase
(0–100)% of UBase
(1–100)% of UBase
-
(0.000-60.000) s
(0.000–60.000) s
25 ms typically at 2 to 0.5 x U
25 ms typically at 0 to 2 x U
10 ms typically at 2 to 0 x U
15 ms typically
1MRK 504 091-BEN B
Issued: June 2010
Accuracy
± 1.0% of S at S < S
r r
± 1.0% of S at S > S
r
< ± 50% of set value
< ± 20% of set value
2 degrees
± 0.5% ± 10 ms
Accuracy
± 0.1% of I
r
± 0.1% of I
r
± 0.5% ± 10 ms
Accuracy
± 1.0% of U
r
± 1.0% of U
r
± 1.0% of U
r
See table 92
± 0.5% ±10 ms
± 0.5% ± 10 ms
-
set
-
set
-
set
-
ABB