Basler Electric BE1-40Q - Manual (Page 40)

= (13.33 Mvar)








12800
3
= 1804 A
Step 3. Specify a BE1-40Q relay having a nominal sensing range of 120 V
LL
(for a PT ratio of
12800/120).
Step 4. Determine the desired secondary current.
Secondary current =
Ratio CT
Current Primary
=
5000/5
1804
= 1.8 A
Step 5. Determine the pickup.
Pickup =
relay
relay
I
V
×
3
= 8 . 1
3
120 ×
= 125
= Low Range, TAP position E (Table 1-1)
OPERATIONAL TEST
Introduction
The following procedures verify proper relay operation and calibration.
Results obtained from these procedures may no fall within specified tolerances. When evaluating results,
consider three prominent factors:
• Test equipment accuracy
• Testing method
• External test set components tolerance level
Pickup Verification
Step 1. Connect the test circuit as shown in Figure 5-2. Apply appropriate operating power, depending
on the power supply option (refer to the Style Chart in Section 1), to terminals 3 and 4. The
POWER LED should illuminate.
Step 2. For relay styles with target indicators, actuate the target reset switch to insure that the target is
reset.
Step 3. Make the following front panel adjustments on the BE1-40Q relay:
RANGE switch - LOW position
TAP switch - Position A (minimum)
TIME DELAY switches - 10 (1.0 second)
Step 4. If equipped with a power supply status output relay (option 2-S), verify that the contact is open
when external power is applied. Remove input power and verify that the status contacts close.
Re-apply external power.
5-2 BE1-40Q Setting and Testing 9171500990 Rev N