Basler Electric BE1-50/51B-240 - Manual (Page 25)

9252000790 Rev B 17
Testing
Introduction
Proper relay operation may be confirmed by performing the test procedures in this chapter.
Dielectric Test
In accordance with IEC 255-5 and IEEE C37.90-1989, one-minute dielectric (high potential) tests may be
performed as follows:
•
All circuits to ground: 2,828 Vdc or 2,000 Vac
•
Input to output circuits: 2,828 Vdc or 2,000 Vac
Output contacts are surge protected.
Test Procedures
The following test procedures verify operation of the BE1-50/51B-240 relay. The test setups illustrated in
Figure 10 and Figure 11 are intended primarily as an illustration of the principles involved. Other test
equipment known to be capable of testing with the stated and implied tolerances (including equipment
designed specifically for testing protective relays) may be used.
The minimum test equipment requirements are:
•
Current source with a range of 0 to 20 Aac (sensing input current)
•
AC or DC voltage source for target operation
•
Timer or counter
Time Overcurrent (51) Pickup
1. Connect and configure the relay for 51 pickup testing:
a. Connect the test setup shown in Figure 10.
b. Set circuit board switch SW3 as follows:
SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation
SW3-2 = OFF (no additional time delay for the 50 element)
SW3-3 = ON (Westinghouse CO type characteristic curves)
SW3-4 = ON (integrating reset characteristic)
c. Set the TIME DIAL to 0.0.
d. Set CURVE to S.
e. Set TIME PICKUP to 0.5.
f. Set INST PICKUP to 90.
2. Apply and increase current to terminals 8 and 9 until the Active/Pickup LED turns red. The applied
current should be no greater than 0.55 Aac.
3. Decrease the applied current until the Active/Pickup LED changes from red to green and then off.
4. Set TIME PICKUP to 2.2.
5. Slowly increase current to terminals 8 and 9 until the Active/Pickup LED turns red. The applied
current should be between 2.131 and 2.269 Aac.
6. Reduce the applied current to zero.
BE1-50/51B-240 Testing