BE1-CDS220
Testing And Maintenance
13-29
Step 2.
To prepare the 87 elements for testing, transmit the commands in Table 13-13 to the relay.
Table 13-13. Pickup Test Commands
Command Purpose
A= Gain
access
SL-N=NONE
Zero out custom logic settings/overwrite with
logic = none settings
Y Confirm
overwrite
SL-N=RDIFF
Name custom logic for this test
SL-87=1,0 Enables
87
SL-VO1=87RT
Enables OUT1 to close for 87 restrained trip
SG-CT1=1,WYE,NA
ctr=1, ct=wye, xfmr=na
SG-CT2=1,WYE,NA
ctr=1, ct=wye, xfmr=na
SG-TRIGGER=87RT,
7RPU,0
Enable 87RT to log and trigger fault recording
E Exit
Y Save
settings
Step 3.
Send to the relay the commands listed in Table 13-14.
NOTE
The tap settings listed in the S#-TAP87 command are within the range of settings for a 5
ampere sensing input type relay. If your relay is a 1 ampere sensing input type, change
the TAP 1 and TAP 2 values to 1.0.
Table 13-14. S#-87 Commands
Command Purpose
A= Gain
access
S#-TAP87=MANUAL,
5.00,5.00
Set TAP 1=5.00 and TAP 2=5.00
S#-87=0.1,15,0,0,0,1
Minpu = 0.1, slope = 15%, 2
nd
= disable, 5
th
= dis-
able, URO = disable, 2
nd
harm sharing = 1 (yes)
E Exit
Y Save
settings
Step 4.
Apply current to phase A, input 1 and slowly ramp up until OUT1 closes. The relay should
pickup at a value of minimum pickup x TAP (see Figure 13-12).
Summary of Contents for BE1-CDS220
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