ABB REQ650 - Page 8

Preprocessing blocks (SMAI)...................................................... 45
Calculating settings for global base values for setting function
GBSVAL...................................................................................... 46
Calculating settings for instantaneous phase overcurrent
protection 3-phase output PHPIOC ............................................ 46
Calculating settings for four step phase overcurrent
protection 3-phase output I> OC4PTOC .................................... 47
Calculating general settings................................................... 47
Calculating settings for step 1................................................ 47
Calculating settings for step 2................................................ 49
Calculating settings for step 3................................................ 51
Calculating settings for instantaneous residual overcurrent
protection EFPIOC ..................................................................... 52
Calculating settings for four step residual overcurrent
protection 3I0> EF4PTOC .......................................................... 53
Calculating general settings................................................... 53
Calculating settings for step 1................................................ 53
Calculating settings for step 2................................................ 55
Calculating settings for step 3................................................ 57
Calculating settings for breaker failure protection 3-phase
activation and output CCRBRF .................................................. 58
Calculating settings for pole discordance protection CCRPLD .. 59
Section 4 Analog inputs..................................................................61
Introduction.......................................................................................61
Setting guidelines............................................................................. 61
Setting of the phase reference channel.......................................61
Relationships between setting parameter Base Current, CT
rated primary current and minimum pickup of a protection IED.. 62
Setting of current channels..........................................................62
Example 1.............................................................................. 63
Example 2.............................................................................. 64
Examples on how to connect, configure and set CT inputs
for most commonly used CT connections.............................. 65
Example on how to connect a star connected three-phase
CT set to the IED....................................................................66
Example how to connect single-phase CT to the IED............ 69
Setting of voltage channels......................................................... 71
Example................................................................................. 71
Examples how to connect, configure and set VT inputs for
most commonly used VT connections....................................71
Examples on how to connect a three phase-to-earth
connected VT to the IED........................................................ 72
Example on how to connect a phase-to-phase connected
VT to the IED..........................................................................74
Table of contents
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Application manual