Related Manuals for Bitronics QTWIE2
Summary of Contents for Bitronics QTWIE2
- Page 1 Watt/VAR Instruments Watt/VAR User Manual 2-Element, 3-Wire August 7, 2009 ML0030 Document Revision B © 2009 by Bitronics, LLC (Includes 0-1mA Transducer Outputs) No. QTWIE2 WATT/VAR METER No. WTWIE3 WATTMETER No. RTWIE3 VARMETER...
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Page 2: Table Of Contents
4.0 FIELD ADJUSTMENTS ................4.1 Rescaling ....................4.2 Calibration ....................4.3 Self Test Modes ..................4.4 Cleaning ....................4.5 Electronics Module Removal ..............5.0 QUESTIONS AND ANSWERS ..............6.0 WIRING DIAGRAMS ................. ML0030 August 2009 Copyright 2009 Bitronics, LLC − ii −... -
Page 3: Certification
If the equipment is used in a manner not specified by Bitronics, the protection provided by the equipment may be impaired. -
Page 5: Description
State of the art technology makes it possible to measure these functions very accurately, over a wide range of input signals. The Bitronics Three Phase WATT/VAR Meters are rugged electronic instruments designed for utility and industrial applications requiring reliable, precise measurements of three-phase real power (WATTs) and/or reactive power (VARs). -
Page 6: Specifications
1.5 Ampere, non-time delay (M) fuse, UL listed located in the ungrounded (hot) side of the line, external to meter. Operating Temperature: -30C to 70C. Humidity: 0-95% non-condensing Installation Category: IC III Weight: 2.5 pounds ( 1.14 kilograms ) ML0030 August 2009 Copyright 2009 Bitronics, LLC − 2 −... -
Page 7: Principles Of Operations
Figure 1 - WATT/VAR Meter Exploded View (QTWIE1 Shown) 2.1 Modular Construction The Bitronics WATT/VAR Meters are composed of two major modules, as shown in the exploded view of the meter (Figure 1). The BASE MODULE consists of the case tube, the back panel, the Current Transformer &... -
Page 8: Current And Potential Transformer Board (Ct/Pt Board)
Bitronics WATT/VAR instruments provide for complete interchangeability among signal processing and display modules. Compensation for normal variations in input circuits is achieved by storing calibration constants in a non-volatile memory (EEPROM) which resides on the PS board. -
Page 9: Microcontroller Board (Mcu Board)
A positive indication of this condition is provided by having the watchdog flash both of the LED displays on the front panel. ML0030 August 2009 Copyright 2009 Bitronics, LLC − 5 −... -
Page 10: Led Display Board (Led Board)
MCU is reset, a display test will be conducted that displays +1.8.8.8 on the top display, followed by +1.8.8.8 on the bottom display (QTWIE2 only). The display test can be initiated by entering and then leaving the CT/PT set mode (see section 4.1). -
Page 11: Installation
PERFORMED BY PROPERLY TRAINED OR QUALIFIED PERSONNEL. 3.1 Initial Inspection Bitronics' instruments are carefully checked and "burned in" at the factory before shipment. Damages can occur, however, so please check the instrument for shipping damage as it is unpacked. Notify Bitronics immediately if any damage has occurred, and save any damaged shipping containers. -
Page 12: Surge Protection
PT, it is recommended that one side of the PT be grounded at the instrument following ANSI/IEEE C57.13.3-1983. The MOV board voltage rating is indicated on the MOV board, and must match the voltage supply rating of the instrument. ML0030 August 2009 Copyright 2009 Bitronics, LLC − 8 −... -
Page 13: Field Adjustments
2. Flip the small toggle on the left of the meter UP for CT set (DOWN for PT set). On the QTWIE2, the top display will show the present CT setting, and the bottom display will show the present PT setting. The negative sign will be illuminated to indicate the selected display. - Page 14 6. Replace gasket, front cover and four cover screws. Done!! The position of the decimal point for the WATTs and/or VARs display is automatically calculated by the microcontroller; this provides up to three decades of range. With the ML0030 August 2009 Copyright 2009 Bitronics, LLC − 10 −...
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Page 15: Calibration
Cleaning the exterior of the instrument shall be limited to the wiping of the instrument using a soft damp cloth applicator with cleaning agents that are not alcohol based, and are nonflammable, nonexplosive. ML0030 August 2009 Copyright 2009 Bitronics, LLC − 11 −... - Page 16 CT and/or PT ratios. The ratios. If Fault continues, fault code 1 (--1). On transducer outputs are still functional and replace Power Supply Board QTWIE2 bottom display accurate. and recalibrate the instrument, displays 3 dashes (---). or replace the Base Module.
- Page 17 3 dashes (---) and Microcontroller will force transducer outputs board or the electronics module. error fault code 6 (--6), other to >2ma (0-1ma out) or 2ma (4-20ma out). displays show 3 dashes (---). ML0030 August 2009 Copyright 2009 Bitronics, LLC − 13 −...
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Page 18: Electronics Module Removal
Board (MCU) and LED Display Board (LED). In the unlikely event of a board failure, it may be necessary to remove the Electronics Module from the instrument. Bitronics has designed the WATT/VAR meters in a modular fashion to facilitate this repair in the field, by allowing the module to be removed with the meter powered and in the panel. -
Page 19: Questions And Answers
Yes! Correct wiring with proper polarity is essential for proper operation. 5. Can I put WATT/VAR meters in an outdoor cabinet? Yes. Many Bitronics meters are installed that way. The temperature range of -20C to 70C covers most applications. The case is gasketed, but not waterproof, so it... -
Page 20: Wiring Diagrams
Figure 4 - Typical connection diagram for 2 Element Watt, Var & Watt/Var Meters... - Page 21 Revision Date Changes 01/30/2009 Update Bitronics Name, Logo E. Demicco 08/14/09 Updated logos and cover page MarCom Bitronics LLC. 261 Brodhead Road, Bethlehem, PA. 18017 (610) 997-5100 Fax (610) 997-5450 www.novatechweb.com/bitronics...
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