Three Phase Meter Qualification Board (MQB3)
Apply true three phase voltage and current to electric meters, enabling them to be tested under all possible conditions that may be encountered in the field with TESCO’s Three Phase Meter Qualification Board (MQB3).
Description
Features:
- Simple, electronically-controlled loading of meters
- Voltage and Current routed to the proper locations on the meter socket based on form selected
- Voltage and Current amplitude adjustable per phase at the keypad
- Current Drive: single range 0.01 to 50A (rms), 70A (peak)
- Back voltage sensing during disconnect testing
- Standard services selectable at the keypad
- User friendly 7″ diagonal, 800×480, TFT color display and keypad for setup
- Phasor relationship between channels (i.e. A to B phase angle) adjustable at the keypad
- Power Factor (phase angle) adjustable at the keypad
- Service disconnect testing through keypad selection
- IR port, radio, and PLC communications testing can be completely checked out for all meters loaded into the board
- Each MQB3 comes with a PC program that can be loaded onto a computer connected to the MQB3’s Ethernet port to replicate the functionality of the display and keyboard on multiple chassis
The MQB3 facilitates the following meter shop functions in high volume:
- New AMI/AMR meters settings check-out
- Meter program updates
- Software revision checking for both the meter and the communications module
- Communications module troubleshooting
- Checking of problem meters for open/shorted elements
With the MQB3, the user has the ability to check meter response to:
- Varying loads over long periods of time to simulate brown out and surge conditions
- Harmonic waveforms (can download custom harmonic waveforms through PC interface)
- Meter power on/off cycling
- Phasor distortion
Specifications
| Specification | Details |
|---|---|
| MQM-100 Master Controller | 3 voltage/current waveform generators, socket controls, relays, display, keypad, power indicator lamps |
| MSM-100 Socket Module | 1 socket, socket controls, relays, power indicator lamps |
| Service Disconnect Power | 120–240V to forms 1S, 2S, 12S; auto-switched during test |
| System Configurations | MQB3-12C (1 master), MQB3-21 (2 masters), MQB3-30 (3 masters) |
| Digital Waveform Generator | 45–60 Hz, sinusoidal <0.5% THD, harmonics 1–25, ANSI C12.20-2015, 4096-point arbitrary waveform |
| Voltage Drive (3-Channel) | 30–250V / 200–500V RMS, 353–707V peak, 100VA output, 0.5% accuracy |
| Current Drive (3-Channel) | 0.01–50A RMS, 70A peak, 1.5V compliance, ±0.5% accuracy |
| Meter Socket Controller (VRM-3PH) | Auto meter detection/routing for forms 1S–166S, bypass detection |
| Power Line Communication | 240V autotransformer allows powerline signals to transmit from meter to wall |
| Disconnect Switch Testing | High-current transformer, LED indicators, voltage detection, back-voltage reconnect |
| Rack Enclosure | 25.54”W × 25.62”D × 70.5”H, 15” work surface, casters & leveling feet |
| Power Requirement | 120V, ≤20A, high inrush current, 12″ rear clearance for ventilation |
| Rear Connections | Power inlet (L5-20S), Ethernet to internal network |
| Front Connections | Main power breaker, Ethernet, duplex outlet (2A max) |
| Service Access | Limit to 2 racks bolted together for left/right/rear access |
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