BG TriColor AC Power
Circular BarGraphs
0
-20
+40
MEGAVARS
-60
Watt, VAR and Power Factor Meters
for Single and Three Phase Systems
+20
-40
- 7 202
.
-80
-100
+60
+80
+100
BG-261TC
Center Zero
80
KW
120
I68.45
160
200
0
These Weschler BG TC Circular BarGraphs are optimized for AC
power measurements. The ACP3 models include self contained CT
(Current Transformers) and PT (Potential Transformers) plus
accurate solid state circuitry to measure both single and poly
phase applications. A self-contained instrument provides better
accuracy than a separate transducer and meter.
Weschler BarGraphs combine the visual indication of an analog
meter with the precision of a digital instrument. Large digits and a
wide viewing angle allow operators to easily monitor the signal from
a distance.
The ACP3 Watt and Varmeters can replace analog instruments such
as the Weschler/Westinghouse KP-241, KP-261, KV-241 and KV261. The analog backplate option duplicates the Westinghouse
terminal stud connections. The BG-241 and BG-261 panel footprint
and mounting also match other 4½" and 8¾" switchboard meters
such as the GE AB40, DB40, AB16 and DB16.
GENERATOR #1
40
ACP3
BG-281TC
Solid Bar
Mode
ACP3 BarGraph instruments are housed in a rugged steel case. They
are designed for long life in utility switchboards and other control
applications. Installation is also simplified with the ACP3 series.
FEATURES
50
40
30
70
VAR
20
7 0.045
10
Large, high resolution
50 segment LED bar array
60
80
5 digit display with resolution
to 0.01%
90
100
0
BG-281TC
Banded Bar
Mode
40
60
KW
20
80.00
0
Weschler
80
100
BG-241TC
WESCHLER
INSTRUMENTS
DIVISION OF HUGHES CORPORATION
16900 FOLTZ PARKWAY - CLEVELAND, OH 44149
Phone: (440) 238-2550 - Fax: (440) 238-0660
www.weschler.com e-mail: sales@weschler.com
Field programmable functions
Zero and full scale point location
Setpoint type (Hi or Low)
Hysteresis & latching
Setpoint time delay
16 step dimming
Digital display for engineering units
Enable/disable front buttons
I.D. selection for communication
Bar form
Peak / Valley enable
Color zones
Over-range /Under-range flashing
Lamp test
Form-C relay outputs
Normally Open Contact
5A, resistive @ 250V AC
5A, resistive @ 28V DC
Normally Closed Contact
3A, resistive @ 250V AC
2A, resistive @ 28V DC
Communication
RS232/485, SCADA, DCS
Analog retransmit
4-20, 0-1mA DC
1-5, 0-1, 0-5 V DC
Retrofit sizes for:
GE/Yokogawa AB/DB 40, 4½” and
AB/DB 16 8¾" switchboard
meters
Peak and Valley hold
Crompton 075/07, 4½" and
8¾" switchboard meters
Trend indication for signal
direction
Ashcroft, Heise 8" gauges
Dixson BW051/P
Weschler K241, K261
SPECIFICATIONS
Bar Display
50 segment LED
2% full scale resolution
Circular display:
0
BG-241
285
0
BG-261/281 255
Setpoints
Four SPDT relays with form C
contacts available.
Hysteresis 0.00-10.00% FS or
latching.
Time delay 0-10 sec.
Digital Display
5 digit
-9999 to 99999
Resolution
0.01% full scale
Linearity
±1 count
Retransmit Signals
4-20mA DC
0-1mA DC
1-5V DC
0-5V DC
Height
BG-241
BG-261/281
Communication
RS232
RS485 (2-wire)
0.4"
0.8"
(10.16mm)
(20.32mm)
Response Time
AC
<800msec full scale
Input Impedance
30kohm @ 120V AC P.T.
0.1ohm @ 5A AC C.T.
Input Isolation
AC
Transformer isolated
(>50mA, 1V)
Input Overload Ratings
200%, not to exceed 10 A
200%, not to exceed 300 V
Input Range (RMS)
MIN - MAX
Current
1mA - 5A AC
Voltage
50mV - 250V AC
Power
Accuracy
120/240V AC ±10% (13VA)
Watt, VAR
±0.5% of full scale
12, 24, 28, 48, 250V DC ±10% (8W) Power Factor ±0.1 PF
Temperature
Operation
00 to 500C, <95% RH 110-250V DC (8W),
(non-condensing)
85-264V AC (13VA)
Storage
-400 to 850C
The Weschler ACP Power Series BarGraph is a self-contained instrument. Correct installation and
connection is critical to the success of the application. Review the phaser diagrams to determine
the proper configuration for your application, particularly in retrofit situations. Caution should be
taken for VAR applications where historically many engineers have specified a Wattmeter, 90
degree phase shifter, and a VAR scaleplate. If your application has phase shifters in place and you
wish to leave them in the circuit, you will need to order a WATT bargraph with a VAR scale.
ARTWORK GUIDELINES
11 CHAR.
14 CHAR.
17 CHAR.
X
MULTIPLIER: 4 CHAR. FIELD IF REQUIRED
BG- 241 4.5" (114.3 mm) SQUARE
BG- 261 8.5" (215.9 mm) SQUARE
BG- 281 8.5" (215.9 mm) ROUND
ORDERING GUIDE
Specify scale markings and
legend when ordering
TriColor ACP3
PART NUMBER
TYPE:
4 = BG241
6 = BG261
8 = BG281
BAR COLOR:
T = TriColor
4-1/2" Square BarGraph
8-3/4” Square BarGraph
8" Circle BarGraph
BAR ZERO POINT:
B = Zero at Bottom
H = Zero at 50% mid scale
F = Zero at F.S.
S = Special /off scale zero
DIGITAL DISPLAY:
R = Red
Y = Yellow
G = Green
S = Special
INPUT TYPE:
L = Watts single phase
H = Watts three phase
V = VARs single phase
Z = VARs three phase
Y = VARs three phase for external phase shifter (4-wire only)
G = Power factor (display 1.00 max, specify lag on right or left)
Specify:
CT ratio _____________
Full scale Watts value ___________
PT ratio _____________
External phase shifter ___________
System Delta
or WYE
B Y 4
Analog Backplate
Conformal Coating
Custom Artwork
Spraytight Front (BG241/261)
None
Special
T
X
=
=
Trend Indicator
NA
P
X
=
=
Peak/Valley Hold
NA
RETRANSMIT:
C = 1-5V DC (or 0-5V on request)
D = 0-1V DC
F = 4-20mA DC
G = 0-1mA DC
W = Excitation Power 24 VDC @ 90mA
S = Special
X = None
SETPOINT HYSTERESIS:
P = Programmable
S = Special
X = Not required
4
=
=
=
=
=
=
COMMUNICATION:
A = RS232
C = RS485 Bi-directional
X = None
SETPOINT RELAYS:
4 = 4 Relays
X = No relays
S = Special order
EXAMPLE:
B
K
A
Y
X
S
P H 3
3
1
F A P T
A T
(4) BG-241, (B) zero at bottom, (Y) Yellow digits, (4) 4 relays,
(P) Programmable setpoint hysteresis, (H) Watts input,
(33) 3 phase, 3 wire, (1)120 VAC 50/60 Hz power, (F) 4-20 mA DC
isolated retransmit, (A) RS232 communication,
Options and features vary by model. Contact factory for details and latest specifications.
POWER:
1 = 120V AC ±10% 50/60Hz
2 = 240V AC ±10% 50/60Hz
4 = 12V DC ±10% *
6 = 250VDC ±10%
7 = 24V DC ±10%
8 = 28V DC ±10%
9 = 48V DC ±10%
U = 110-250V DC / 85-264V AC, 50-440Hz
*Max ambient 45°C
INPUT LEVEL:
12 = Single phase two wire
13 = Single phase three wire
33 = Three phase three wire
34 = Three phase four wire
3E = Three phase four wire
WESCHLER INSTRUMENTS
1 element
2 element
2 element
2½ element
3 element
16900 FOLTZ PARKWAY - CLEVELAND, OH 44149
Phone: (440) 238-2550 - Fax: (440) 238-0660
www.weschler.com e-mail: sales@weschler.com
DIMENSIONS
BG-241
A*
0.687"
17.450 mm
4.421"
112.293 mm
1.687"
42.850 mm
0.315" DIA. (X4)
8.001 mm
1.687"
42.850 mm
1.687"
42.850 mm
3.960"
100.584mm
4.421"
112.293 mm
4.0" DIA.
101.6 mm
1.687"
42.850 mm
FRONT VIEW
SIDE VIEW
PANEL CUTOUT
(FOR BG241 / 261)
BACK VIEW
BG-261
8.750"
222.25 mm
1.015"
25.781 mm
A*
*Case Depth
Extended
3.960"
100.584 mm
8.750"
222.25 mm
A
inches
mm
5.150
126.17
Mounting Torque Requirements
65-70 inch-pounds maximum.
FRONT VIEW
SIDE VIEW
BACK VIEW
BG-281
1.015"
25.781 mm
B
DIM. B
Inches (mm)
A*
3.960"
100.584 mm
10.062
(246.52)
DIM. C
Inches (mm)
DIM. D
Inches (mm)
2.055-4.455R.
(52.20-113.16)
1200
1200
4.754 R.
(120.75)
0.312 DIA.TYP.
7.925 mm
FRONT VIEW
SIDE VIEW
C
D
PANEL CUTOUT FOR BG-281
TERMINAL CONNECTIONS
3f 4W Wattmeter
ALARMS
HI
C B A
3f 3W Wattmeter
COMM
LO
ALARMS
RX C Tx
HI
2
4
3
5
6
3
2
1
HI HI
--
LO LO
2
4
3
10 11 12
1
2
--
8
3 2 1
10 11 12
6
7
C
NO
C
4
9
NC
NC
NO
NO
C
5
8
2
AC connections
are screw terminals
1
10 11 12
1
+
3
7
6
7
3
9
2
3
ReXmit
5
8
NC
9
6
LO LO
NO
8
RX C Tx
5
+
HI HI
7
COMM
LO
1
C
1
4
9
NC
N C B A
ReXmit
3 2 1
10 11 12
Options and features vary by model. Contact
factory for details and latest specifications.
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BARGRAPH POWER
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BARGRAPH POWER
5/28/08