Basler Electric BE1-47N - Manual (Page 39)

9170400990 Rev J BE1-47N Testing 5-3
4. Raise the input voltage until the Undervoltage Pickup LED turns off. Record the input value. Dropout
should be within 2.0% of the pickup value (i.e., input voltage at time of pickup, LED on).
Verification Tests
Verification tests consist of definite time verification and inverse time verification.
Definite Time Verification
The definite time circuitry for the negative sequence voltage (47N), overvoltage (59), and undervoltage
(27) functions operates similarly and can be tested using the same philosophy. In order to reduce the
amount of redundant procedural steps, only the overvoltage function is addressed here.
1. Connect the test setup as indicated in Figure 5-2.
2. Adjust the Overvoltage Time Delay switch to 33.
3. Adjust the Overvoltage Pickup switch to the A (2%) position.
4. Connect the voltage source to case terminals 7 (A-phase) and 8 (C-phase) and adjust the voltage
source to 1.20 times the nominal input value (120%).
5. Close switch S1 to initiate the timer. The Overvoltage Pickup LED will light and the timer should time
out at 3.3 seconds ±5%.
Inverse Time Verification
Due to the similarities in inverse timing for the functions of this relay, only the negative sequence function
is addressed here. The remaining functions can be verified using the same test philosophy.
1. Connect the test setup as indicated in Figure 5-1.
2. Adjust the Negative Sequence Pickup switch to the B (4%) position. Adjust the Negative Sequence
Time Delay switch to 10.
3. Short or jumper case terminals 7 (B-phase) and 8 (C-phase).
4. Using Table 5-2 as a guide, apply voltage at case terminals 6 (A-phase) and 7 (C-phase). Note that
the input voltage values are two times the actual pickup value.
Table 5-2. Inverse Time Test Voltage
Sensing Input Range Voltage Input
3) 120 Vac, 60 Hz 16.628 Vac +0.17 Vac, 60 Hz
4) 100 Vac, 50 Hz 13.856 Vac +0.14 Vac, 50 Hz
5) 208 Vac, 60 Hz 28.80 Vac +0.29 Vac, 60 Hz
6) 173 Vac, 50 Hz 24.00 Vac +0.24 Vac, 50 Hz
5. Measure and record the interval from initiate to contact closure at case terminals 1 and 10. The 47N
inverse time should be 5.96 +0.298 seconds.
Further points on the inverse time curves may be verified using the same philosophy. Input voltage
values for pickup may be obtained using the equations mentioned previously.