Basler BE1-32R/32O/U Direction Power Relay Setting and Testing Guide

This application is extremely sensitive to phase rotation, especially for relays that use B, E, or V-type sensing (single-phase current+line voltage). When wiring, it is necessary to strictly follow the ABC or ACB phase sequence, otherwise the power direction discrimination will be completely incorrect.

Key electrical parameters and selection verification

3.1 Current and Voltage Input Range

CT secondary current: 5A (50/60Hz). Different sensing input ranges (1~9) correspond to different continuous/short-time heat resistance capabilities. For example, the continuous rating of ranges 1, 4, and 7 is 7A, while that of ranges 2, 3, 5, 6, 8, and 9 is 10A. The site needs to confirm that the CT thermal capacity matches the relay.

Voltage input: PT secondary side 100/120V (50/60Hz), continuous withstand voltage 150% rated, power consumption<1VA.

3.2 Power Setting Range (Refer to Table 1-4 in the Manual)

Taking the common 120V, 1-phase (Type A/B/V) as an example:

Low range (Switch Lo): 0.5~5.0W (taps A~K correspond to 0.5, 1.0, 1.5... 5.0)

High range (Switch Hi): 2.0~20.0W (corresponding to taps 2, 4, 6... 20)

In addition, there are medium range (20~200W, 100~1000W, etc.) corresponding to higher voltage or three-phase connections.

For three-phase 120V (Type C/D/E), multiply the set value by the corresponding coefficient (such as three times), and refer to the testing section for the specific formula.

3.3 Time Characteristics

Instantaneous: Overpower response<80ms (60Hz)/<100ms (50Hz), underpower<50ms/65ms.

Time limit: By using two dials (0.1~9.9 seconds) in combination with x0.1 or x1.0 multiplier switches, a delay of 0.1~99 seconds can be achieved. Setting it to "00" means instantaneous.

Inverse time limit (only over power): The curve is selected by the dial numbers (01~99), and the typical curve is shown in Figure 1-15. The action time is inversely proportional to the multiple of "power/setting value", which is suitable for situations that require coordination with downstream fuses or circuit breakers.

Front panel control and operation guide

Familiarity with panel layout (Figure 2-1) is the foundation for quick tuning. The main control components include:

Range selection switch (A): Select the high/low range of over power.

Overpower tap selector (C): The rotary switch corresponds to taps A~K, and the starting power value is determined by matching the range.

Overpower delay dial (B) and multiplier switch (E): Set the time limit or inverse time limit curve number.

Underpower setting potentiometer (G): The adjustable range is 10%~95% of the over power setting value, increasing by a percentage counterclockwise.

Underpower delay dial (F) and multiplier switch (J): only time limited, no inverse time limit.

Indicator lights: Over power/Under power start indicator (LED), power indicator.

Target reset switch (K): The target indicator light for resetting the electronic latch, with a red LED as the target, remains in a state after power loss (restored after power supply is restored).

Output test button (N): The output relay can be manually triggered by pressing it with an insulating rod for circuit inspection.

Operation prompt: If the relay is instantaneous, there is no delay dial or multiplier switch; If it is an inverse time type, the delay dial is used to select the curve number rather than the number of seconds.

Practical steps for on-site testing and calibration

Section 5 of the manual provides detailed testing methods, now refined as the "four step method", suitable for regular calibration or verification before installation and operation.

5.1 Testing Wiring

Select the corresponding test connection diagram (Figure 5-1~5-5) based on the sensing type (A/B/C/D/E/V). Core principles:

Use a single-phase or three-phase power source (or analog source), apply voltage to the corresponding terminal, and connect the current source in series to the CT circuit.

If a three-phase source is lacking, a single-phase source can be used in parallel simulation, but the power reading needs to be corrected according to the formula (see the notes in each figure).

5.2 Overpower start-up value and return coefficient test

Set range to "low", tap to "B", delay to "00" (instantaneous), underpower knob all counterclockwise (to shield underpower).

Apply the rated voltage and slowly increase the current until the over power indicator light is on. Record the reading (or calculated value) of the wattmeter at this time, which should be equal to ± 2% of the power value corresponding to the panel tap (power factor 1.0).

Slowly reduce the current and record the power at the moment when the indicator light goes out, which should be about 98% of the starting value (with a return coefficient of about 0.98).

Repeat taps E and K for verification.

5.3 Under Power Start and Return

Set the underpower knob all clockwise (i.e. set to 95% of the over-power value), delay the instant, and select the over-power tap (such as B).

First, increase the current to exceed the underpower setting point, then slowly decrease the current until the underpower light is on. The recorded power value should be equal to 95% ± 2% of the over power setting value (or 0.1W, whichever is greater).