Basler Electric BE3-74SH - Manual

www.basler.com
+1 618.654.2341 (USA)
[email protected]
Model BE3-74SH, BE3-74SL,
and BE3-74SD
INTRODUCTION
BE3 dc millivolt sensing relays provide voltage monitoring
and protection for any application where dc voltage levels
are critical. A common application is overcurrent protection
for dc charging systems. Millivolt input signals from shunts,
sensors, or transducers can provide the input signals.
Undervoltage, overvoltage, and combined over/undervoltage
units are available. A time delay control provides an
adjustment of 0 to 10 seconds (operating time is typically
200 ms). This time delay may be used to prevent false
tripping when there are slight variations in the input signal.
BE3 dc millivolt sensing relays operate when the adjustable
trip point is reached. 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 falls below the trip point. A red LED indicates
the state of the relay. A green LED indicates the condition of
the power supply.
SPECIFICATIONS
Operating Power
All units require external operating power.
Nominal Voltage: 120 Vac, 240 Vac, 380 Vac, 480
Vac, or 24 Vdc
Frequency: 45 to 65 Hz
Impedance: 100
Ω max
Overload: 10 times nominal continuously
Burden
Vac: 2 VA
Vdc: <3 W
Sensing Input
Nominal Voltage: 50 mVdc, 100 mVdc, and 10 to
99 mVdc (specify nominal range)
Impedance: 50 k Ω
Setpoint
Undervoltage Range: Adjustable 0 to 80% ( ±3%) of
nominal
Overvoltage Range: Adjustable 40 to 120% ( ±3%) of
nominal
Time Delay: Adjustable 0 to 10 s
Repeatability: Greater than 0.5% of full span
Differential: Fixed at 5% of nominal
Operating Time: 200 ms typical
Output
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 Unit: 0.88 lb (0.4 kg)
Combined Unit: 1.32 lb (0.6 kg)
Size
Single Unit: 2.17” wide (55 mm)
Combined Unit: 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
BE3-74SH and BE3-74SL dc millivolt sensing relays have
two user-adjustable controls marked SET and DELAY. The
BE3-74SD has four controls: UNDER SET, UNDER DELAY,
OVER SET, 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 40
to 120% (
±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 0 to 80% (
±3%) of nominal input.
The time delay is the amount of time that elapses after the
trip point is reached and when the output relay operates.
Setting Example
A BE3-74SH relay with a nominal input rating of 100 mVdc
has the following settings:
•
SET - 80%
•
DELAY - 4 s
A trip occurs when the sensing voltage rises above 80 mVdc
and 4 seconds elapse. Reset occurs when the voltage
decreases below 75 mVdc (5% of nominal below the
setpoint).
Publication
9320800990
Revision
C
Instructions
Date
03/14
Copyright
2014