Basler Electric BE1-87T - Manual (Page 113)

9171300990 Rev V BE1-87T Test Procedures 5-17
Second-Harmonic Restraint Verification
Step 1. Set the INPUT 1 (tap) switches to the 0.4 A position. Connect the relay as (refer to Figures 5-1
through 5-4, as appropriate; except set both current sources to 0° for second-harmonic restraint
verification) using terminals 11 & 13 (Input 1 for both single-phase and three-phase units).
Step 2. Apply 0.4 A at 50 or 60 Hz, as appropriate for the style, to Input 1. The REST. TRIP LED should
be illuminated.
Step 3. Increase the second-harmonic current until the REST. TRIP LED extinguishes indicating that
the inhibit point has been reached. Note the magnitude of the second-harmonic component at
the inhibit point.
NOTE
With two current sources in parallel, apply the fundamental frequency and then
add the required harmonic.
Step 4. To calculate the second-harmonic inhibit percentage, divide the second-harmonic current
measured in Step 3 by the current applied in Step 2. (Divide the harmonic current by the
fundamental current.) Factory setting is 12.0 ±3% for single-phase units and 18.0 ±3% for
three-phase units.
Step 5. Three-Phase Units Only: Repeat Steps 1 through 4 for phase B (terminals 12 & 13) and
phase C (terminals 14 & 13).
Fifth-Harmonic Restraint Verification
Step 1. Set the INPUT 1 (tap) switches to the 0.4 A position. Connect the relay as appropriate (refer to
Figures 5-1 through 5-4; except set both current sources to 0° for fifth-harmonic restraint
verification) using terminals 11 & 13 (Input 1 for both single-phase and three-phase).
Step 2. Apply 0.4 A at 50 or 60 Hz, as appropriate for the style, to Input 1. The REST. TRIP LED should
be illuminated.
Step 3. Increase the fifth-harmonic current until the REST. TRIP LED extinguishes indicating that the
inhibit point has been reached. Note the magnitude of the fifth-harmonic component at the
inhibit point.
Step 4. To calculate the fifth-harmonic inhibit percentage, divide the current measured in Step 3 by the
current applied in Step 2. (Divide the harmonic current by the fundamental current.) Factory
setting is 35.0 ±3% for both single-phase and three-phase styles.
Step 5. Three-Phase Units Only: Repeat Steps 1 through 4 for phase B (terminals 12 & 13) and
phase C (terminals 14 & 13).