WATT HOUR TRANSDUCERS
WATTHOUR TRANSDUCER
MODEL WL55
FEATURES
• Low Cost
• Small Physical Size
• + 0.5% Accuracy
• Self Powered
• Solid State Relay Output/LED Indicator
• Diagnostic LED Status
APPLICATIONS
WATT HOUR TRANSDUCERS
Monitoring Examples
• Motor Loads
• Chillers
• HVAC Systems
• Sub Metering
ORDERING INFORMATION
Example: 480V L-L, 200A,
3 Phase 3 Wire
WL55-346
WL55-343
VOLTAGE
NOMINAL
CURRENT
RANGE
F.S.
KWH
INPUT OUTPUT*
THREE PHASE
THREE WIRE or
FOUR WIRE
(3 ELEMENT)
120 L-L
240 L-L
120 L-N
(120/208)
0-5A
(USE WITH
2.1KW
EXTERNAL
CT'S)
WL55-346
VOLTAGE
NOMINAL
CURRENT
RANGE
THREE PHASE
THREE WIRE or
FOUR WIRE
(3 ELEMENT)
480 L-L
277 L-N
(277/480)
0-5A
(USE WITH
4.2KW
EXTERNAL
CT'S)
WL50 OPTIONS
8" X 10" X 6" Enclosure
0.005*
(5WH)
F.S.
KWH
INPUT OUTPUT*
KWH Counter
0.005*
(5WH)
KYZ Relay........................ Add Suffix K to Model Number
Analog Watt Output Options
0-1mAdc.......................... Add Suffix B to model number
0-10Vdc...........................Add Suffix D to model number
0-5Vdc........................... Add Suffix X5 to model number
4-20mAdc........................ Add Suffix E to model number
* Standard: Pulse Output. Optional: KYZ - Relay Change of State
To calculate scaling with different current transformer
ratios, multiply the CT ratio by 0.005 kWh.
Example
100:5 ratio CT's
Ratio = 100:5 = 20:1
20 X 0.005 = 0.1kWh
SPECIFICATIONS
INPUT
Voltage.......................................................................See Table
Measurement Range.........................+20% of nominal input
Over range.......... 150V, 300V, or 600V depending on model
Current.......................................................................See Table
Over range..................................................... 150% of range
Frequency.................................................................... 50/60Hz
Power Factor...............................................0.5 Lead to 0.5 Lag
Burden
Voltage......................................................... 0.4VA per line
Current...................................................................... 2.5VA
Instrument Power...................................................... 2.5VA
Dielectric Test....(Input/Output/Case)...........................1500Vac
Termination..........................................................14 AWG max.
Div. Morlan & Associates, Inc.
4970 Scioto Darby Rd. Hilliard, Ohio 43026
OUTPUT
ACCURACY................................................. + 0.5% F.S.
Includes linearity,repeatability and setpoint
KWH Relay
Type.............Standard.............. Form A, Solid State Contact
......................................................... 120V, 0.3A, 10VA max.
Type.............(Optional)................. Solid State, Form C, KYZ
.....................Scaling..............................................See Table
.....................Duration.................................................200ms
Temperature Effect.......... (0OC to +50OC)................ +0.03%/OC
Optional Analog Watt Output:
Loading (Ohms)
1mAdc...................................................... <10K
5Vdc, 10Vdc............................................... >2K
4-20mAdc................................................. <500
Weight.......................................................................... 2.0 Lbs.
WWW.FLEX-CORE.COM
sales@flex-core.com
146
PHONE (614) 889-6152
TECH. ASSISTANCE (614) 876-8308
FAX # (614) 876-8538
WATT HOUR TRANSDUCERS
CONNECTION DIAGRAMS/SPECS
MODEL WL55
CASE DIMENSIONS
0.19
7.00
11
12
13
14
15
16
1
2
3
4.00
4
5
6
7
8
9
10
2.50
0.75
MOUNTING HOLES, .188" DIA., 6 PLCS.
0.344" DIA., 3 PLCS.
2.13
1.00
7.38
All Dimensions In Inches
CONNECTION DIAGRAMS
THREE PHASE, THREE WIRE
(120/240/480Vac LINE to LINE)
LINE
L1
L2
L3
X1
X1
L1
L2
3
L3
4
5
6
7
8
9
10
N
CT1
CT2
WL55-343
(120/240Vac)
11
12
13
14
15
16
WL55-346
(480Vac)
LINE
with KYZ
OPTION
-
L1
L2
L3
N
WH
PULSE
OUTPUT
+ ANALOG
WATT
OUTPUT
(OPTIONAL)
X1
X1
X1
CT3
THREE PHASE, FOUR WIRE
(120/208Vac or 277/480Vac)
1
L1
2
L2
3
L3
4
5
6
7
8
9
10
N
CT1
CT2
WL55-343
(120/208Vac)
K
Y
Z
with KYZ
OPTION
11
12
13
14
15
16
WL55-346
(277/480Vac)
-
WH
PULSE
OUTPUT
+ ANALOG
WATT
OUTPUT
(OPTIONAL)
CT3
LOAD
LOAD
Do not unplug the CT1, CT2, CT3 terminal block while CT's are connected to a live circuit.
VOLTAGE
(GREEN
LEDS)
VOLTAGE
>266V L-N
>460V L-L
#1
#2
#3
CURRENT
(RED LEDS)
#1
#2
#3
ON
ON
ON
N/A
N/A
N/A
CONSUMED ENERGY
KWH PULSE
ONLY
(RED LEDS)
RELAY OFF/RELAY ON
WH
OFF/ON
Div. Morlan & Associates, Inc.
VOLTAGE
VOLTAGE
>177V L-N <265V L-N >85V L-N <176V L-N
>306V L-L <459V L-L >147V L-L <305V L-L
ON BLINK OFF
ON BLINK OFF
ON BLINK OFF
GOOD CT
CONNECTION
ON
ON
ON
4970 Scioto Darby Rd. Hilliard, Ohio 43026
OFF BLINK ON
OFF BLINK ON
OFF BLINK ON
CT REVERSED
OFF BLINK ON
OFF BLINK ON
OFF BLINK ON
LOW or MISSING
VOLTAGE
<85V L-N
<145V L-L
OFF
OFF
OFF
NO LOAD
CURRENT
OFF
OFF
OFF
WWW.FLEX-CORE.COM
sales@flex-core.com
147
WL55 Diagnostics
The WL55 has a set of 7 Light Emitting
Diodes (LED) to aid in diagnosing problems
with connections. There are 3 green LED's
for voltage, 3 red LED's for current, and 1
red LED for watt-hours. LED indicators are
as shown.
*CAUTION
To prevent damages to power lines, transducer
or personnel, NEVER connect the current
inputs directly to the line. Use 600Vac rated
current transformers with 5A secondary.
PHONE (614) 889-6152
TECH. ASSISTANCE (614) 876-8308
FAX # (614) 876-8538
WATT HOUR TRANSDUCERS
X1
1
2
K
Y
Z