ABB RET670 Product Manual page 73

ABB
Transformer protection RET670
Pre-configured
Product version: 1.1
Table 55. Voltage control TR1ATCC, TR8ATCC, TCMYLTC and TLCYLTC, continued
Function
Alarm level of active power in
forward and reverse direction
Alarm level of reactive power in
forward and reverse direction
Time delay for alarms from power
supervision
Tap position for lowest and highest
voltage
mA for lowest and highest voltage
tap position
Type of code conversion
Time after position change before
the value is accepted
Tap changer constant time-out
Raise/lower command output pulse
duration
Scheme communication
Table 56. Scheme communication logic for residual overcurrent protection ECPSCH
Function
Scheme type
Communication scheme
coordination time
Range or value
(-9999.99–9999.99) MW
(-9999.99–9999.99) MVAr
(1–6000) s
(1–63)
(0.000–25.000) mA
BIN, BCD, GRAY, SINGLE, mA
(1–60) s
(1–120) s
(0.5–10.0) s
Range or value
Permissive Underreaching
Permissive Overreaching
Blocking
(0.000-60.000) s
1MRK 504 091-BEN B
Issued: June 2010
Accuracy
± 1.0% of S
± 1.0% of S
± 0.5% ± 10 ms
-
-
-
± 0.5% ± 10 ms
± 0.5% ± 10 ms
± 0.5% ± 10 ms
Accuracy
-
± 0.5% ± 10 ms
r
r
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