Basler Electric BE1-50/51B-241 - Manual (Page 25)

9252000792 Rev D 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 C37.90-2005, 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-241 relay. The test setups illustrated in
Figures 10 through 12 are intended primarily as an illustration of the principals 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 (target operation)
•
Timer or counter
Note
To ensure proper timing during testing, remove the current from the
relay for R times D seconds. (Refer to the Characteristic Curves
chapter for definitions of R and D.
When testing TIME overcurrent functions, INST PICKUP settings of 00
will affect the calibration of the TIME functions. TIME PICKUP settings
of 00 also affect INST functions.
Observe all applicable electrostatic discharge (ESD) precautions when
handling the relay assembly.
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:
a. SW3-1 = ON for 50 Hz operation or OFF for 60 Hz operation
b. SW3-2 = OFF (no additional time delay for the 50-A element)
c. SW3-3 = ON (Westinghouse CO/COM type characteristic curves)
d. SW3-4 = ON (integrating reset characteristic)
c. Set the TIME DIAL to 0.0.
d. Set CURVE to S.
BE1-50/51B-241 Testing