Table of Contents
What Is ZMTBBL High-Voltage Passive Filter Reactive Compensation Device？
The ZMTBBL Series High-Voltage Passive Filter Reactive Compensation Device is designed for 6–35kV power systems. Installed in parallel with harmonic sources, it absorbs harmonic currents to suppress distortion and eliminate harmonic pollution, while simultaneously supplying reactive power to improve the system power factor. It is deployed across power generation, steel, metallurgy, chemicals, coal mining, light industry, and building materials.
Working Conditions of the ZMTBBL High-Voltage Passive Filter Reactive Compensation Device
- Installation Environment — Outdoor or indoor
- Ambient Temperature — -40°C to +45°C
- Altitude — No more than 1000m (customizable for higher altitudes)
- Relative Humidity — Monthly average ≤ 85%
- Anti-Pollution Capability — External insulation creepage distance ≥ 25mm/kV (relative to the system's highest operating voltage); increased for heavily polluted areas
- Atmospheric Conditions — No corrosive gases or vapors, no conductive or explosive dust at the installation site
- Mechanical Conditions — No severe mechanical vibration; maximum wind speed ≤ 35 m/s
Product Parameters
| Parameter | Specification |
|---|---|
| Actual vs. Rated Capacitance | 0% to +5% of rated capacitance |
| Inter-Terminal Capacitance Balance | Max/min ratio between any two line terminals ≤ 1.02 |
| Reactance Tolerance (@Rated Current) | 0% to +5% |
| Per-Phase Reactance Balance | Each phase within ±2% of three-phase average |
| Insulation Level | Coordinated with system protection level; expressed as impulse withstand / power frequency withstand (e.g., LI/AC), listed from high to low voltage winding |
| Steady-State Overcurrent | Continuous operation at ≤ 1.1 × 1.3 IN (IN = nominal current) |
| Maximum Allowable Capacity | Total capacity ≤ 1.35 QN (QN = nominal capacity) |
| Discharge Performance | Capacitor voltage ≤ 50V within 5 seconds after power interruption |
| Filtering Efficiency | ≥ 85% |
| Compensated Power Factor | ≥ 0.92 after compensation |
| Rated Capacity & Dimensions | Determined according to user requirements |
Why Choose ZHIMING's ZMTBBL High-Voltage Passive Filter Reactive Compensation Device?
Dual-Function Harmonic Filtering & Reactive Compensation
Unlike standalone capacitor banks or active filters, the ZMTBBL combines harmonic absorption and reactive power supply in a single parallel-connected unit. It achieves filtering efficiency ≥85% while boosting the system power factor to ≥0.92, reducing both harmonic distortion penalties and reactive energy charges on one investment.
Robust Environmental Tolerance
Engineered for harsh industrial conditions, the device operates reliably from -40°C to +45°C ambient temperature, at altitudes up to 1000m (higher on request), and in outdoor installations with wind speeds ≤35 m/s. External insulation creepage exceeds 25mm/kV — with uprated values available for heavy pollution zones — ensuring dependable service in steel mills, chemical plants, and coastal substations.
Precision Tuning & Tight Tolerance Control
Capacitor banks are matched to within 2% inter-terminal capacitance balance, inductors maintain reactance within ±2% of the three-phase average, and overall capacitance deviation is held to 0%–+5%. This precision keeps the passive filter tuned to target harmonic frequencies, maintaining filtering effectiveness over the full operating life.
Flexible Configuration & Industry Standards Compliance
With multiple wiring methods (single star / double star) and five relay protection options (open delta, voltage differential, unbalanced current, bridge differential, unbalanced voltage), the ZMTBBL adapts to any site's protection philosophy. The device complies with GB 50227-2008, JB/T 7111-1993, and DL/T 604-1996, with rated capacity and dimensions tailored to user requirements.
FAQ
What voltage range and industries is the ZMTBBL device designed for?
The ZMTBBL High-Voltage Passive Filter Reactive Compensation Device is designed for 6–35kV power systems and is primarily deployed in power generation, steel, metallurgy, chemicals, coal mining, light industry, and building materials — anywhere harmonic currents are generated by non-linear loads such as arc furnaces, rolling mills, and large rectifier banks.
How does this device handle both harmonic filtering and reactive compensation?
The ZMTBBL is connected in parallel with the harmonic source. Its passive filter branches are tuned to specific harmonic frequencies (typically 3rd, 5th, 7th, 11th) to absorb harmonic currents near the source. Simultaneously, the capacitive elements supply reactive power to the system, improving the power factor to ≥0.92 without requiring a separate capacitor bank.
What is the filtering efficiency?
Filtering efficiency reaches ≥85%, meaning over 85% of targeted harmonic currents are absorbed locally rather than propagating back into the upstream network. This significantly reduces voltage distortion and protects transformers, cables, and connected equipment from harmonic-related overheating and premature aging.
What protection methods are available for the ZMTBBL?
Five relay protection configurations are available: open delta voltage protection (K), voltage differential protection (C), unbalanced current protection (L), bridge differential current protection (Q), and unbalanced voltage protection (Y). The appropriate method is selected based on the system’s neutral grounding scheme and protection coordination requirements.
Can the ZMTBBL be customized for high-altitude or heavily polluted environments?
Yes. While the standard rating covers altitudes up to 1000m and standard anti-pollution creepage ≥25mm/kV, products for high-altitude locations and special environmental conditions — including heavy pollution, coastal salt spray, or extreme temperature ranges — can be negotiated and designed to order.
