BE1-951
Testing and Maintenance
13-7
Step 5 Repeat Step 3 for all desired output contacts and verify that the sequence of events recorder
logged the events.
Step 6 Transmit the commands CS-OUT=DIS, CO-OUT=DIS, EXIT, and YES to disable the output
control override capability of the relay.
Current Circuit Verification
Step 1 To verify IN and IQ, connect an ac current source to terminals D1 and D2.
Step 2 Apply the appropriate current values in Table 13-3 to the relay. Measured IN should correspond
to values in Table 13-3 while IQ (negative sequence current I2) should be 1/3 the applied value
+ 1.5% (For example, if the applied value equals 2amps, IQ=2/3=0.6 1.5% or + .01
amps). Verify current measuring accuracy by transmitting the M command to the relay for each
applied current value. HMI Screen 3.7 also can be used to verify the IN and IQ current
measurement.
Table 13-3. Current Circuit Verification Values
Sensing Type
Applied Current
Measured Current
Lower Limit
Upper Limit
1 A
0. 25 amperes
0.2475 A
0.2525 A
1 ampere
0.99 A
1.01 A
2 amperes
1.98 A
2.02 A
3 amperes
2.97 A
3.03 A
4 amperes
3.96 A
4.04 A
5 A
1 ampere
0.99 A
1.01 A
5 amperes
4.95 A
5.05 A
10 amperes
9.9 A
10.1 A
15 amperes
14.85 A
15.15 A
20 amperes
19.8 A
20.2 A
Step 3 To verify IP and IG, connect a suitably sized jumper wire across relay terminals D2 and D3, D4
and D5, and D6 and D7. Apply an ac current source to terminals D1 and D8.
Step 4 Apply the appropriate current values in Table 13-3 to the relay. Verify current measuring
accuracy by transmitting the M command to the relay for each applied current value. HMI
Screens 3.5 and 3.6 also can be used to verify current measurements. Screen 3.7, IN, will read
3 times the phase value.
Step 5 Leave current circuit connected and de-energized. These test connections will be used later
when verifying power readings.
Three-Phase Voltage Circuit Verification
Step 1 Connect an ac voltage source at nominal frequency between relay terminals C13 (A-phase) and
C16 (Neutral terminal). Apply 100 volts and verify voltage-measuring accuracy by transmitting
the M command to the relay. Readings should be: M-VA=100 volts, M-VAB=100 volts,
M-VCA=100 volts, M-3V0=100 volts, and M-V2=33.4 volts (applied divided by 3), all at + 1.0%.
HMI Screens 3.1, 3.2, and 3.4 can also be monitored to verify voltage measurements.
Step 2 Connect an ac voltage source at nominal frequency between relay terminals C14 (B-phase) and
C16 (Neutral terminal). Apply 100 volts and verify voltage-measuring accuracy by transmitting
the M command to the relay. Readings should be: M-VB=100 volts, M-VAB=100 volts,
M-VBC=100 volts, M-3V0=100 volts, and M-V2=33.4 volts (applied divided by 3), all at + 1.0%.
HMI Screens 3.1, 3.2, and 3.4 can also be monitored to verify voltage measurements.
