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5-4 BE1-50/51M - Testing

Step 4. Slowly increase current to terminals 8 and 9. INST contacts should close at an input current of 7.815

to 8.185 amperes.

Step 5. Decrease input current until INST output contacts open.

Time Dial Test

Perform preliminary setup:

Connect test setup as shown in Figure 5-1.

Insure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type curves

selected (200 series relays) ), and SW3-4 to OFF (selects instantaneous reset).

Set TIME DIAL to 4.5.

Set CURVE to S

Set TIME PICKUP to 1.0.

Set INST PICKUP to 90.

Step 1. Prepare to apply 1.5 amperes input current to terminals 8 and 9 and record the elapsed time from when

current is applied until TIME output contacts close.

Step 2. Apply the current (step from 0 to 1.5 amperes) and record the elapsed time. Elapsed time should be

1.754 to 2.084 seconds. (This tolerance is greater than ±2 % because it is the accumulation of both

pickup and timing tolerances.)

Step 3. Remove input current.

Target Test

Perform preliminary setup:

Connect test setup as shown in Figure 5-2.

Insure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type curves

selected (200 series relays) ), and SW3-4 to OFF (selects instantaneous reset).

Set TIME DIAL to 4.5.

Set CURVE to S

Set TIME PICKUP to 1.0.

Set INST PICKUP to 01.

Step 1. Set target current source to 1.0 ampere, ac.

Step 2. Apply 5 amperes input current to terminals 8 and 9. Check that both TIME and INST targets operate.

Step 3. Remove input current and reset targets.

Courtesy of NationalSwitchgear.com

Basler BE1-50/51M-100 Series User Manual

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