Basler Electric BE3-32 User Manual

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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

Instructions

Date

04/14

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

Instructions

Date

04/14

Page

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