Hangzhi HZ311 Series Three-Phase High-Precision Standard Meter
Looking for the HZ3125 specification or custom 125A three-phase meter configurations? The official production designation is the HZ311 Series. Contact us for more details.
The HZ3015 / HZ3125 is a field-deployable, high-precision three-phase electric energy meter, portable testing device, and transfer reference standard meter. Engineered to deliver laboratory-grade 0.05% accuracy in a rugged, self-contained field architecture, this system enables complete verification, error calculation, and harmonic calibration of active and reactive energy meters directly on-site without removing metering assets from service or interrupting the load circuit.
Utilizing an advanced digital signal processing system, it generates and measures highly stable parameters across wide operating ranges. It serves as an essential secondary transfer standard for electrical testing teams, utilities, renewable asset managers, and NABL-accredited laboratories across the Indian power sector.
The calibrator satisfies strict compliance and on-site testing requirements for revenue, tariff, and check meters throughout India’s generation, transmission, and distribution grid infrastructures:
- Power Transmission (DISCOMs, State Transcos, & PGCIL): On-site validation and error testing of main and check tariff meters at EHV/HV grid substations and boundary interconnection corridors to resolve billing discrepancies.
- Renewable Energy Plants (Solar PV, Wind, & BESS Developer O&M): Verification of commercial energy meters at utility-scale solar inverter outputs, wind farm pooling stations, and Point of Common Coupling (PCC) meters to satisfy performance ratio (PR) guarantees and Central Electricity Authority (CEA) guidelines.
- NABL Electro-Technical & Metrology Labs: Deployed as a high-accuracy, portable transfer standard for commercial testing houses, serving as a secondary verification standard alongside permanent, fixed laboratory benches (such as Zera or MTE systems).
- EV Charging Infrastructure Network Operators: In-field accuracy tracking of high-power AC charging station billing meters and industrial commercial power supply feeds to ensure consumer billing transparency.
- Indian Railways & Metro Traction Substations: Boundary and depot auxiliary load meter calibration, ensuring the integrity of traction substations handling non-linear locomotive loads.
- Heavy Industrial Facilities (HT/LT Consumers): Energy auditing, billing verification against utility supply meters, and sub-metering reconciliation in heavy manufacturing plants like steel, cement, and petrochemical facilities.
Crucial Technical Specifications & Measurement Limits
- Accuracy Class: Core measurement uncertainty rated at Level 0.05 / 0.05% RG for active power and energy parameters.
- AC Voltage Output Range: Generates standard configurations of 57.7V, 100V, 220V, and 380V, with a maximum line voltage ceiling reaching up to 456V AC.
- AC Current Output Range: Full-scale multi-range flexibility starting from 100 mA up to a high-capacity current ceiling of 120 A AC.
- Advanced Harmonic Simulation: Natively compiles 2 to 41 higher-order harmonics with adjustable content limits (0% to 40%) and independent phase-angle tracking to simulate complex power quality disruptions or non-linear load behavior on the grid.
- Output Stability & Control: Delivers ultra-stable performance parameters bounded at 0.01% / minute with total voltage/current waveform distortion tightly limited below 0.2% under non-capacitive/non-inductive load profiles.
- Physical Form Factor: Housed in a durable, portable standalone chassis weighing ≤35 kg, featuring a large, highly reflective integrated LCD touch-screen interface, eliminating the need to take vulnerable commercial laptops into harsh substation yards.
- Connectivity & Storage: Equipped with onboard high-capacity FLASH ROM for structural calibration record management, alongside native RS232, RS485, and optional CAN communication ports for automated testing system integration.
How Does It Compare to Other Calibration Equipment in India?
| Feature / System Spec | HZ3015 / HZ3125 Field Kit (Hangzhi) | Global Benchtop Reference Meters (e.g., Radian / Zera / MTE) | Local Accucheck / Consumer Testing Devices |
|---|---|---|---|
| Primary Placement Strategy | Handled directly on-site at substation or feeder panels. | Stationary deployment inside climate-controlled NABL metrology labs. | Mass consumer meter checking across local low-voltage utility pools. |
| Harmonic Testing Domain | Built-in simulation up to the 41st harmonic order. | Comprehensive multi-harmonic profiling across complex source ranges. | Basic total harmonic distortion (THD) reporting; rarely synthesises harmonics. |
| Max Current Profile | Up to 120A AC parallel direct delivery. | Typically requires stationary amplifiers for extended multi-amp ranges. | Low- to mid-scale current testing paths, optimized primarily for standard LT consumer limits. |
| Standalone Portability | Completely independent, integrated touch-screen unit. | Large, heavy rack structures or multi-part modular flight cases. | Handheld basic logging units, lacking programmable multi-source simulation capability. |
Why Procurement Teams Choose the HZ3015 / HZ3125
- Integrated Multi-Function Capability: Functions simultaneously as an AC standard source, standard meter, and digital energy error verification apparatus to deliver rapid, small-batch field calibration loop verification.
- Comprehensive Fault Protection Safety: Built-in advanced hardware closed-loop safeguards automatically identify load anomalies, promptly flashing warnings, and instantly intercepting output if a voltage short-circuit, open-circuit current path, or thermal overload event occurs.
- Direct Alignment with Smart Meter Verification Requirements: Designed to meet the stringent auditing demands generated by India's national smart meter and AMI rollouts, ensuring utility billing reconciliation remains mathematically precise.
- Seamless Indian Distribution & Support Ecosystem: Imported, supplied, and technically backed across India by Myriad Industrial Solutions LLP, providing complete documentation, traceable verification reports, and reliable after-sales technical assistance
Frequently Asked Questions (FAQs)
Q: Can this calibrator be written into standard operating procedures for NABL-accredited laboratories?
A: Yes. With its Class 0.05 high-accuracy threshold and structural data management tracking over RS232/RS485 networks, the HZ3015/HZ3125 serves as an excellent transfer or working standard for electro-technical calibration centers running periodic system checks.
A: Yes. With its Class 0.05 high-accuracy threshold and structural data management tracking over RS232/RS485 networks, the HZ3015/HZ3125 serves as an excellent transfer or working standard for electro-technical calibration centers running periodic system checks.
Q: How does the system handle high-distortion environments common near solar inverters and wind farms?
A: The HZ3015 / HZ3125 features an advanced harmonic settings matrix capable of generating and analyzing between the 2nd and 41st harmonic channels. This allows technicians to directly calibrate and verify meter performance against severe non-linear wave distortions typical of modern renewable energy grid injection points.
A: The HZ3015 / HZ3125 features an advanced harmonic settings matrix capable of generating and analyzing between the 2nd and 41st harmonic channels. This allows technicians to directly calibrate and verify meter performance against severe non-linear wave distortions typical of modern renewable energy grid injection points.
Q: Is a dedicated laptop or software program required to change testing values in the field?
A: No. While it can connect to a PC via RS232 for advanced data file management, it functions as a completely standalone unit. The high-contrast, integrated LCD color touch screen enables field operators to alter voltages, currents, phase angles, and harmonic levels manually or automatically right at the site panel.
A: No. While it can connect to a PC via RS232 for advanced data file management, it functions as a completely standalone unit. The high-contrast, integrated LCD color touch screen enables field operators to alter voltages, currents, phase angles, and harmonic levels manually or automatically right at the site panel.
Looking for a Portable Secondary Injection Test Set Price in India?
Contact Myriad Industrial Solutions LLP directly for official ex-stock availability.
customized accessory configurations, and commercial project quotes for the HZ3015/HZ3125.
