Basler Electric BE3-32 User Manual

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+1 618.654.2341 (USA)

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INTRODUCTION

BE3-32 reverse power relays monitor the direction of power
flow from ac generators. Single-phase or three-phase, three­wire units are available. If current flow from the generator
becomes reversed and exceeds the adjustab le sett ing, the
relay will trip. BE3-32 relays can prevent generator motoring
due to a loss of prime mover torque. An adjustable DELAY
control is provided to avoid tripping caused by transients
encountered during synchronization. A RELAY LED
indicates output relay status. The POWER LED indicates
the condition of the power supply.

SPECIFICATIONS

Inputs

All units are self powered.
Nominal Voltage: 120 Vac, 240 Vac, 380 Vac, or

480 Vac
Current Sensing: 5 Aac nominal
Frequency: 50, 60, or 400 Hz

Burden

Voltage: Less than 3 VA
Current: Less than 0.5 VA

Overload Withstand

Voltage: 1.25 times nominal continuously.

2 times nominal for 3 seconds.
Current: 2 times nominal continuously.

10 times nominal for 3 seconds.

Setpoint

Range: Adjustable 2 to 20%, (±3%) of

nominal, of reverse current
Repeatability: Better than 0.5% of full span
Time Delay: Adjustable 0 to 20 sec
Hysteresis: 1% of nominal

Outputs

Relay Type: D.P.D.T.
AC Rating: 250 V, 5 A, non-resistive,

1200 VA
DC Rating: 125 V, 1 A, resistive, 120 W
Mechanical Life: 5 million operations

Temperature

Operating Temperature: 0°C (32°F) to 60°C (140°F)
Functional Temperature: –25°C (–13°F) to 70°C (158°F)
Storage Temperature: –40°C (–40°F) to 70°C (158°F)
Temperature Coefficient: 0.03% per °C (300 ppm/°C)

Humidity

Relative Humidity: 95% non-condensing

Model

Physical

Mounting: DIN rail 1.38” by 0.29” (35 mm by

Case: Complies with IEC 529, DIN

Case Material: Complies with UL 94VO
Weight: 1.32 lb (0.6 kg)
Size: 3.94” wide (100 mm)

Agency

cULus Listed to UL 508 and CSA C22.2 No. 14
CE compliant
GOST-R certified per the relevant standards of Gosstandart

of Russia

BE3-32

7.5 mm)

40050, BS 5490

OPERATION

BE3-32 reverse power relays have two external, user­adjustable controls marked SET and DELAY. The SET
control adjusts the point at which the relay trips when
reverse current flow is detected. The SET control is
adjustable from 2% (0.1 A) to 20% (1.0 A) of nominal (5 A).
Setpoint range accuracy is ±3% of nominal. When the
reverse power setting is exceeded, the output relay
energizes and the red RELAY LED lights. The green
POWER LED indicates the condition of the power supply.
The DELAY control adjusts the time between when the
reverse power setpoint is exceeded and the outp ut relay
energizes. The DELAY control setting range is 0 to 20
seconds.

Setting Example

A BE3-32 relay has the following settings:

• SET - 10%

• DELAY - 10 seconds

The relay begins timing toward a trip when 0.5 A of reverse
current flow is detected. The output relay trips 10 seconds
after the reverse current threshold is excee ded.

INSTALLATION

BE3 reverse power relays are designed for mounting on
standard DIN rails that comply to DIN-EN 50022. Mounting
involves hooking the top edge of the cutout on the base of
the case over one edge of the DIN rail. The opposite side of
the cutout containing the release clip is then pushed over
the opposite side of the DIN rail. To remove or reposition the
relay, lever the release clip and move the relay as required.
BE3 relays should be installed in a dry, vibration-free
location where the ambient temperature does not exceed
the operating temperature range. Connections to the relay
should be made using wire that meets applicable codes and
is properly sized for the application. Figure 1 shows the
terminal connections for the BE3-32 relay.

Publication

9319800990

Revision

F

Instructions

Date

04/14

Copyright

2014

CALIBRATION

The calibration marks on the faceplate have a maximum
error of 10% and are provided only as guides. Proper
calibration requires using an accurate meter to monitor the
current. Use the following procedure to calibrate your relay.

Setpoint

1. Adjust the SET control fully clockwise and the DELAY

control fully counterclockwise.

2. Apply nominal input voltage to the relay. Apply the

desired value of trip current to the relay. The
connections for the current should be reversed to
simulate reverse power.

3. Slowly adjust the SET control counterclockwise until the

relay trips.

Delay

1. Set the DELAY control at the desired time setting.

2. Apply nominal input voltage to the relay.

FIGURES

3. Apply a value of reverse current that is greater than the

relay trip point. Measure the time from when the current
is applied until the relay trips.

4. Compare the measured time to the desired time delay

and adjust the DELAY control accordingly.

5. Repeat Steps 3 and 4 as required.

MAINTENANCE

BE3 relays are solid-state devices that require no
maintenance. In the event that your relay requires repair,
contact Basler Electric, Highland, IL, USA for return
authorization.

ORDERING INFORMATION

Figure 2 shows the BE3 reverse power relay style numbers.

• BE3-32-1: Single-Phase Reverse Power

• BE3-32-3: Three-Phase Reverse Power

Publication

9319800990

Figure 1. BE3-32-1, BE3-32-3 Reverse Power Relay Connections

Figure 2. BE3-32-1, BE3-32-3 Style Number Identification Chart

Revision

F

Instructions

Date

04/14

Page

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