Hooks & Associates, Inc.

The Volt, Amp, Watt, and Watt Hr Transducer Unit (VAW) provides quality, reliability, and flexibility of a lightweight and adaptable transducer for measuring product power. All your power measurements of products can answered by combining the VAW with the Remote Measurement Unit (RMU) or other equipment.

Applications include;

Equipment monitoring for process control.
Power monitoring on products.
Integration into energy management systems, or a variety of sub-metering applications.
Measurement using direct-connection, current and/or potential transformers.
The VAW consists of multiple Ohio Semitronics, Inc. transducers that are pre-wired in a complete assembly for the acquisition of voltage, amperage, watts, and watt hrs of a connected product. Although, the current specifications are for specific transducers that have been chosen for this unit, Ohio Semitronics, Inc. offers many types of transducers and options that could easily be accommodated. Consult the factory for optional configurations and pricing.

The unit contains an IEC 320 AC inlet for product power with an additional outlet for daisy chaining additional VAW units. One IEC 320/F outlet is available for supplying measured product power. Instrument power is supplied through a 3-pin watertight connectors with an additional female for daisy chaining power to other instruments. An 8-pin watertight connector user interface is provided for acquisition of measurement signals from the internal transducers.

The unit is adaptive to most environments making it easy for the VAW unit to be used in most industry applications by standardizing the I/O and having all of it accessible from one panel. Each VAW is supplied with an instrument supply, instrument jumper cable, product power, and product supply jumper cables. Many other options are also available for different transducer and connector configurations to meet specific applications.

Rugged Enclosure Design

The uniquely designed enclosure contains two major pieces which consist of a corner and flat extrusion that enables the enclosure to be very rugged once assembled. The aluminum extrusions are black anodized to provide a durable and corrosion resistant enclosure. Once assembled and sealed the enclosure provides a NEMA 4 or 12 enclosure providing that watertight connectors are used on the interface panel.

The enclosure includes special dovetail tracks that allows multiple optional units to be mounted to all sides of the enclosure. Multiple enclosures of varying sizes can be interlocked together including the; remote measurement unit (RMU-01) and power switch unit (PSU-04) offered by Hooks and Associates, Inc. A wall mounting plate allows quick installation and removal without tools. Handles and isolation feet are also available.

Hooks & Associates, Inc. also offers a complete engineering department and fabrication shop to design and outfit enclosures, panels, and integration of complete test systems per your specifications. Panels can be configured with connectors, switches, displays etc. to meet your requirements.

VAW Specifications

RMS Voltage Transducer (Mdl. VTR-002D):
Input: 0-300Vac (50-400Hz)
Output: 0-10Vdc

Input:
Burden: 0.12VA F.S.
Overload: Full-scale rating.
Dielectric Test (Input/Output/Case): 1500Vac

Output:
Output Ripple: Less than 1.0% F.S.
Response (90%): 100ms
Output loading (ohms):

0-1mA: 0-10K
0-5Vdc: 2K min.
4-20mA: 0-500

Accuracy:
± 0.25% F.S. (at 60 Hz)

Instrument power (Std.): 85-135Vac, 50-400 Hz
Optional 220Vac instrument power available
Greater accuracy available upon request

RMS Current Transducer (Mdl. CTR-005D):
Input: 0-5A
Output: 0-10Vdc

Input:
Burden: 0.28VA F.S.
Current Overload:

1-10A range: 2 times F.S. (cont.)
1A range: 10A(10 Sec. Transient)
All other ranges:
50A (10 Sec. Transient)
250A (1 Sec. Transient)

Dielectric Test (Input/Output/Case): 1500Vac

Output:
Output Ripple: Less than 1.0% F.S.
Response (90%): 100ms
Output loading (ohms):

0-1mA: 0-10K
0-10Vdc, 0-5Vdc: 2K min.
4-20mA: 0-500

Field adjustable CAL.: ± 10%

Accuracy:
± 0.25% F.S. (at 60 Hz)

Instrument power (Std.): 85-135Vac, 50-400 Hz
Optional 220Vac instrument power available
Greater accuracy available upon request

AC Watt/Watt Hour Transducer (Mdl. GH-002D):
Input: 0-300Vac , 0-5A (50-400Hz)
F.S. in WATTS: 1000

Output:
0-10Vdc for watts
TTL output for Watt Hrs at 250K count

Input:
Frequency range: 58 to 62 Hz
Optional 50 Hz.: 48 to 62 Hz
Power factor: Any
Burden:

Voltage: 0.1VA per phase
Current: 0.28VA per phase

Voltage Overload:

150V range: 175V
300V range: 350V
600V range: 600V

Current Overload (Cont.):

5A range: 2 times F.S.
10A range: 2 times F.S.
20A range: F.S.

Current Overload (transient):

All ranges
50A (10 sec./hr)
250A (1 sec./hr)

Dielectric Test (Input/Output/Case): 1800Vac (RMS)

Output:
Option T: 5V TTL
Output loading (ohms):

0-1mA: 0-10K
± 10Vdc: 2K min.
4-20mA: 0-500

Response time (99%): Less than 400 ms
Field adjustable CAL.: ± 2%
Compliance voltage: 12Vdc min.
Open circuit voltage: ± 15Vdc

Accuracy:
± 0.2% RDG.; ± 0.05%F.S.

Instrument power (Std.): 90-135Vac, 50-400 Hz
Optional 220Vac instrument power available
Greater accuracy available upon request

Unit Power:
90 to 135 VAC, 60 Hz
Optional 220Vac instrument power and 50Hz also available

Unit Connectors:
Conxall watertight connectors except for product power IEC 320/xx connectors. All watertight connectors available upon request.