5 Functions
5.1 Functions included in AQ-T215
The AQ-T215 transformer protection relay includes the following functions as well as the number of
stages in those functions.
Table. 5.1 - 4. Protection functions of AQ-T215.
Name (number
of stages)
IEC
ANSI
Description
NOC (4)
I>
I>>
I>>>
I>>>>
50/51
Non-directional overcurrent protection
DOC (4)
Idir>
Idir>>
Idir>>>
Idir>>>>
67
Directional overcurrent protection
NEF (4)
I0>
I0>>
I0>>>
I0>>>>
50N/51N
Non-directional earth fault protection
DEF (4)
I0dir>
I0dir>>
I0dir>>>
I0dir>>>>
67N/32N
Directional earth fault protection
OV (4)
U>
U>>
U>>>
U>>>>
59
Overvoltage protection
UV (4)
U<
U<<
U<<<
U<<<<
27
Undervoltage protection
NOV (4)
U0>
U0>>
U0>>>
U0>>>>
59N
Neutral overvoltage protection
FRQV (8)
f>
f>>
f>>>
f>>>>
f<
f<<
f<<<
f<<<<
81O/81U
Overfrequency and underfrequency protection
ROCOF (1)
df/dt>/< (18)
81R
Rate-of-change of frequency
CUB (4)
I2>
I2>>
I2>>>
I2>>>>
46/46R/46L
Negative sequence overcurrent/
phase current reversal/
current unbalance protection
VUB (4)
U1/U2>/<
U1/U2>>/<<
U1/U2>>>/<<<
U1/U2>>>>/<<<<
47/27P/59PN
Sequence voltage protection
A
AQ
Q-T215
-T215
Instruction manual
Version: 2.04
53
Содержание AQ-T215
Страница 1: ...AQ T215 Transformer protection IED Instruction manual...
Страница 266: ...Figure 5 4 4 167 Connecting mA input to option card A AQ Q T215 T215 Instruction manual Version 2 04 265...
Страница 358: ...Figure 7 3 216 Example block scheme A AQ Q T215 T215 Instruction manual Version 2 04 357...
Страница 380: ...Figure 8 14 239 Panel cutout dimensions and device spacing A AQ Q T215 T215 Instruction manual Version 2 04 379...
Страница 409: ...10 Ordering information A AQ Q T215 T215 Instruction manual Version 2 04 408...