ES-2966 Rev.1
17WT
Rack-mounted Power Transducers 17-RACK
WATT TRANSDUCER
Functions & Features
• Providing a DC output signal in proportion to AC active power
• Measuring bidirectional power flow
• DC output containing little ripple is ideal for computer input
• "Time division multiplication" method accepts distorted waveforms
Typical Applications
• Centralized monitoring and control of power management system in a manufacturing facility or building
• SCR – Silicon Controlled Rectifier
MODEL: 17WT–[1][2]6–R
ORDERING INFORMATION
• Code number: 17WT-[1][2]6-R
Specify a code from below for each of [1] and [2].
(e.g. 17WT-116-R)
• Wattage range (e.g. 0 – 980 W)
[1] CONFIGURATION
1
: 3-phase / 3-wire
2
: Single-phase / 2-wire
3
: Single-phase / 3-wire
[2] INPUT (unbalanced load)
1
: 110 V / 5 A AC
2
: 110 V / 1 A AC
3
: 220 V / 1 A AC
4
: 220 V / 5 A AC
A
: 100 V / 200 V / 1 A AC (single-phase / 3- wire)
B
: 100 V / 200 V / 5 A AC (single-phase / 3- wire)
OUTPUT
Voltage
6
: 1 – 5 V DC (Load resistance 5000 Ω min.)
AUXILIARY POWER SUPPLY
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
GENERAL SPECIFICATIONS
Construction
: Rack-mounted; terminal access via screw terminals on the front and connector on the rear; terminal cover provided
Connection
Input
: M3.5 screw terminals (torque 0.8 N·m)
Output
: Connector
Auxiliary power
: Supplied from connector
Screw terminal
: Nickel-plated steel
Isolation
: Voltage input to current input to output to auxiliary power
Computation
: Time division multiplication
Overrange output
: Approx. -10 to +120 %
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
INPUT SPECIFICATIONS
Frequency
: 50 or 60 Hz
• Voltage Input
Operational range
: 0 – 120 % of rating
Overload capacity
: 150 % of rating for 10 sec., 120 % continuous
• Current Input
Operational range
: 0 – 120 % of rating
Overload capacity
: 1000 % of rating for 3 sec., 200 % for 10 sec., 120% continuous
■
How to determine Wattage Range
Calibration Range [W] = Measuring Wattage ÷ ((VT Ratio) × (CT Ratio))
Check that the required calibration range is within the available range in the table. Specify this range when ordering.
[Example]
3-phase / 3-wire, measuring wattage 750 kW,
VT 3300/110 V, CT 250/5 A
750 × 10
3
[W] ÷ ((3300÷110) × (250÷5)) = 500 [W]
OUTPUT SPECIFICATIONS
INSTALLATION
Auxiliary power supply
Current consumption
: Approx. 40 mA
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 40 to 85 % RH (non-condensing)
Mounting
: Standard Rack 17BXE
Weight
: 200 g (0.44 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,
45 – 65 Hz)
Response time
: ≤ 2 sec. (0 – 100 % ±1 %)
Ripple
: 1 %p-p max.
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 500 V AC @ 1 minute (output to auxiliary power)
2000 V AC @ 1 minute (voltage input to current input to output or auxiliary power)
1500 V AC @1 minute (voltage input or current input or output or auxiliary power to ground)
CONNECTION DIAGRAM
DIMENSIONS unit: mm (inch)
TERMINAL ASSIGNMENTS