Basler-electric BE3-47N User Manual download pdf

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+1 618.654.2341 (USA)

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Model

BE3-47N and BE3-47N/27

INTRODUCTION

BE3-47N phase balance relays protect three-phase lines,

transformers, motors, and generators against phase

unbalance, phase loss, and phase reversal. BE3-47N/27

relays have the added feature of undervoltage protection.

The output relay energizes and the red RELAY LED lights

when a balanced input with the proper phase sequence is

sensed. The output relay de-energizes and the RELAY LED

goes out when a fault condition is detected. The green

POWER LED indicates the condition of the power supply.

Two external controls are provided: UNBAL (unbalance) and

DELAY. The UNBAL control adjusts the percentage of

unbalanced voltage at which the relay trips. The DELAY

control provides an adjustable time delay to prevent tripping

on voltage transients.

SPECIFICATIONS

Inputs

All units are self powered.

Nominal Voltage: 120 Vac, 240 Vac, 380 Vac, or

480 Vac

Overload Withstand: 1.25 times nominal continuously.

2 times nominal for 3 s.

Frequency: 50, 60, or 400 Hz

Burden: <2 VA

Setpoint

Range: Adjustable 5 to 15% (±5%) of

nominal)

Repeatability: Greater than 0.5% of full span

Undervoltage: Preset at 85% of nominal (BE3-

47N/27 only)

Time Delay: Adjustable 0 to 10 s

Operating Time: 200 ms, typical

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

Physical

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

7.5 mm)

Case: Complies with IEC 529, DIN

40050, BS 5490

Case Material: Complies with UL 94VO

Weight: 0.88 lb (0.4 kg)

Size: 2.17” wide (55 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

OPERATION

The BE3-47N and BE3-47N/27 phase balance relays have

two external, user-adjustable controls marked UNBAL and

DELAY. The UNBAL control adjusts the relay trip point. The

relay trips when the voltage becomes unbalanced by the

percentage set by the UNBAL control. The trip point is

adjustable from 5 to 15% (±5%) of nominal input. The

DELAY control adjusts the time from when a fault is

detected until the output contacts change state. The delay is

adjustable from 0 to 10 seconds. The undervoltage feature

of the BE3-47N/27 has no external adjustment and is fixed

at 85% of the nominal input voltage. If all three phases

remain balanced, but decrease below 85% of nominal

voltage, the relay de-energizes.

Settings Example

A BE3-47N/27 relay with a nominal input rating of 120 Vac

has the following settings:

• UNBAL - 10%

• DELAY - 5 s

The relay detects a phase unbalance when any one phase

decreases to 108 Vac or increases to 132 Vac. The output

relay trips five seconds after the phase unbalance is

detected. The output relay also trips if all phases decrease

to 85% of nominal, or 102 Vac.

INSTALLATION

BE3 phase balance 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 BE3-47N/27 relay. Connections

for the BE3-47N relay are identical.

Publication

9320300990

Revision

Instructions

Date

04/14

2014

1 2

Instructions 1

Summary of Contents

Page 1 - Instructions

www.basler.com +1 618.654.2341 (USA) [email protected] Model BE3-47N and BE3-47N/27 INTRODUCTION BE3-47N phase balance relays protect three-phase line

Page 2

CALIBRATION The calibration marks on the faceplate have a maximum error of 10% and are provided only as guides. Proper calibration requires using an a

Related models: BE3-47N/27

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Basler-electric BE3-47N User Manual

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Summary of Contents

Related models: BE3-47N/27

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