MTS-1720 TWO CHANNEL CURRENT SOURCE - Section 9
9-22 MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
9.6.3 Current Programming
The AIA#, AIB# and AIC# commands are used to set the nominal
Φ
-N currents. These are the levels
assumed in the prefault state in
Φ
-N fault mode, and are the levels assumed by unfaulted phases.
The IPR# command is used to set the prefault current level for
Φ
-
Φ
, 3
Φ
and 2
Φ
-N fault types. The IFI#,
IRR#, IDU#, IFF# and IPO# commands act similarly to the I1-LOW and I3 current mode, except that the
values are applied appropriately to 3
Φ
current.
The phases participating in the fault (set by the fault mode) are impacted by these commands. For example,
if 3
Φ
fault mode is selected, all three phases of current will be impacted by the IPR#, IFI#, IRR#, IDU#,
IFF# and IPO# commands. If
Φ
-N B-N fault mode is selected, only Ib would be affected.
All default current levels are set to 0 amps.
9.6.4 Examples
Example 1 The following example command sequence programs the single phase fault, as shown in Figure
9.7.
FMD0
<-
Φ
-N A-N fault mode
IMD5
<- I3-WYE current mode
DYN
<- dynamic operation mode
AVA70
<- set prefault
Φ
-N voltage amplitudes to 70V
AVB70
AVC70
AIA1
<- set prefault
Φ
-N currents to 1A
AIB1
AIC1
PRF1
<- prefault on
POF0
<- postfault off
<- delay two seconds here for phase reading before presetting phase
PRP
PHS10
<- prefault phase angle 10
°
PFI70
<- fault phase angle 70
°
VFI15
<- fault voltage 15V
IFI5
<- initial fault current 5A
STR
<- initiate fault
