Basler Electric BE3-27T User Manual
www.basler.com
info@basler.com
INTRODUCTION
BE3 ac voltage relays provide voltage monitoring and protection in
both single-phase and three-phase systems. They are used in
applications such as utility mains failure, regulation of power
supplies, and to protect voltage sensitive equipment. Undervoltage,
overvoltage, and combined over/undervoltage units are available.
BE3 ac voltage relays operate when the adjustable trip point is
reached. An external time delay control is provided with an
adjustment of 0 to 10 seconds (relay operating time is typically 200
milliseconds). This time delay may be used to prevent false tripping
when there are slight variations in the voltage supply. On
overvoltage units, the output relay energizes when the input signal
exceeds the trip point. On undervoltage units, the output relay deenergizes when the input signal goes below the trip point. A red
LED indicates the state of the relay. A green 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
Overload Withstand: 1.25 times nominal continuously.
Frequency: 50, 60, or 400 Hz
Burden: <2.5 VA per phase on single units
Setpoint
Undervoltage Range: Adjustable 75 to 100% (±3%) of
Overvoltage Range: Adjustable 100 to 125% (±3%) of
Repeatability: Better than 0.5% of full span
Time Delay: Adjustable 0 to 10 seconds
Operating Time: 200 ms typical
Differential: Fixed 1% of nominal
Outputs
Relay Type: D.P.D.T.
AC Rating: 250 V, 5 A, non-resistive,
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
Case: Complies with IEC 529, DIN 40050,
Case Material: Complies with UL 94VO
Publication
9319500990
+1 618.654.2341 (USA)
Vac
2 times nominal for 3 s.
and <3 VA on combined units
nominal
nominal
1200 VA
mm)
BS 5490
Revision
E
Instructions
Model
BE3-27T, BE3-59T,
and BE3-27T/59T
Weight
Single Function: 0.88 lb (0.4 kg)
Multiple Function: 1.32 lb (0.6 kg)
Size
Single Function: 2.17” wide (55 mm)
Multiple Function: 3.93” 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
OPERATION
BE3-27T and BE3-59T ac voltage relays have two external, useradjustable controls marked SET and DELAY. The BE3-27T/59T has
four controls: UNDER SET, OVER SET, UNDER DELAY, and
OVER DELAY. The SET control adjusts the relay trip point. An
overvoltage trip causes the relay output to energize when the
voltage rises above the SET threshold. The overvoltage SET level
is adjustable from 100 to 125% (±3%) of nominal input (V
undervoltage trip causes the relay output to de-energize when the
voltage decreases below the SET threshold. The undervoltage SET
level is adjustable from 75 to 100% (±3%) of nominal input. Time
delay is the amount of time that elapses after the trip point is
reached and when the output relay operates.
Setting Example: a BE3-59T relay with a nominal input rating of 240
Vac has the following settings:
• SET - 120%
• DELAY - 4 seconds
A trip occurs when the sensing voltage rises above 288 Vac and 4
seconds elapses. Reset occurs when the voltage decreases below
285.6 Vac (1% of nominal below setpoint).
INSTALLATION
BE3 ac voltage 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
BE3-27T, BE3-59T, and BE3-27T/59T relays.
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 voltmeter in parallel with the input signal. Use the
following procedure to calibrate your relay.
Overvoltage
1. Adjust the SET control fully clockwise (CW) and the DELAY
control fully counterclockwise (CCW).
2. Apply the desired trip voltage to the relay.
3. Slowly (allow for the 200 ms operating time) adjust the SET
control CCW until the relay trips.
4. Reduce the applied voltage (do not change the voltage level)
and set the DELAY control to the desired time delay.
5. Apply the trip voltage to the relay and measure the time to trip.
Date
04/14
). An
nom
Copyright
2014
6. Adjust the DELAY and repeat Steps 4 and 5 until you have the
BE3-27T, BE3-59T, BE3-27T/59T
N
1) Single Phase
3) Three Phase
Three Wire
4) Three Phase
Four Wire
Sensing Input
Type
MODEL NO.
P0061-75
A) 120 Vac
B) 240 Vac
C) 380 Vac
D) 480 Vac
S) Special voltage
Nominal Input Type
1 2
1) 50/60 Hz
2) 400 Hz
Frequency
N) Not required
External Power
1) Energize to trip (59T)
2) De-energize to trip (27T)
3) Energize to trip over, deenergize to trip under (27T/59T)
Output Type
1
2
For other voltage applications, contact Basler Electric.
Voltages are line-to-line.
desired time delay.
Undervoltage
1. Adjust the SET and DELAY controls fully CCW.
2. Decrease the applied sensing voltage from the nominal value
until the desired tripping voltage is reached.
3. Slowly adjust the SET control CW until the relay trips (allow for
the 200 ms operating time).
4. Set the DELAY control to the desired time delay and apply
nominal voltage to the relay.
FIGURES
5. Step down the applied voltage from nominal to a level just
below the trip level set in Step 3 and measure the time delay.
6. Adjust the DELAY and repeat Steps 4 and 5 until the desired
time delay is achieved.
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 style number identification chart.
Publication
9319500990
Figure 1. BE3-27, BE3-59, BE3-27/59 AC Voltage Connections
Figure 2. BE3-27, BE3-59, BE3-27/59 Style Number Identification Chart
Revision
E
Instructions
Date
04/14
Page
2 of 2
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