Basler Electric BE3-27 User Manual
Instructions
www.basler.com
+1 618.654.2341 (USA)
Model
BE3-27, BE3-59, and BE3-27/59
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 externally adjustable trip
point is reached. A reset control is provided with an adjustment of 1
to 15%. Reset ensures that the parameter being measured returns
to the percent set above or below the trip point before the relay
returns to the original state. On overvoltage units, the output relay
energizes when the input signal exceeds the trip point. On
undervoltage units, the output relay de-energizes 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,
480 Vac
Overload Withstand:
1.25 times nominal continuously.
2 times nominal for 3 s.
Frequency:
50, 60, or 400 Hz
Burden:
<2.5 VA per phase on single units.
<3 VA per phase on combined units.
Setpoint
Undervoltage Range:
Adjustable 75 to 100% (
±3%) of
nominal
Overvoltage Range:
Adjustable 100 to 125% (
±3%) of
nominal
Repeatability:
Better than 0.5% of full span
Reset:
Adjustable 1 to 15%
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
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
BE3-27 and BE3-59 ac voltage relays have two external, user-
adjustable controls marked SET and RESET. The BE3-27/59 has
four controls: UNDER SET, OVER SET, UNDER RESET, and
OVER RESET. 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
nom
). An
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. The
RESET control adjusts the difference between the nominal input
voltage and the reset voltage. An undervoltage reset occurs when
the voltage increases above the RESET setting. The undervoltage
RESET setting is set as the percentage below V
nom
when the relay
will reset. An overvoltage reset occurs when the voltage decreases
below the RESET setting. The overvoltage RESET setting is set as
the percentage above V
nom
where the relay will reset. The
undervoltage and overvoltage RESET setting range is 1 to 15%.
Setting Example: a BE3-59 relay with a nominal input rating of 240
Vac has the following settings:
SET - 120%
RESET - 10%
A trip occurs when the sensing voltage rises above 288 Vac, line-to-
line. Reset occurs when the voltage decreases below 264 Vac (10%
of nominal below the 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
BE3-27, BE3-59, and BE3-27/59 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
Adjust the SET and RESET controls fully clockwise (CW).
Apply the desired trip voltage to the relay.
Slowly adjust the SET control counterclockwise (CCW) until the
relay trips.
Reduce the applied voltage to the desired reset level.
Slowly adjust the RESET control CCW until the relay resets.
Publication
9319200990
Revision
E
Instructions
Date
04/14
Copyright
2014