Basler Electric BE1-50/51B-121 - Manual (Page 53)

9252000994 Rev P BE1-50/51B-214/-215/-223/-225 Testing 5-9
sense all types of faults on a grounded wye system. Refer to Figures 5-1 through 5-4 for recommended
test setups.
Periodic Test
Periodic testing should consist of the following procedures.
Step 1. Verify that the instantaneous pickup is within ±2% of the value set on the dials. Pickup occurs
when the INST output contacts close.
Step 2. Verify that the time pickup is within ±2% of the value set on the dials. Pickup occurs when the
LED turns GREEN then RED.
Step 3. Verify that the time to trip for the curve and time dial settings at a multiple of six is the same as
the time given on the characteristic curve. Refer to Section 1 for the characteristics curves.
Step 4. Verify that the time to trip for the instantaneous element at a pickup multiple of 2 is not greater
than the time given on the instantaneous characteristic curve. Refer to Section 1 for the
instantaneous characteristic curve.
Step 5. Verify that the targets operate with one ac ampere of trip current in the trip circuits and that they
can be reset using the RESET BUTTON.