Power disturbances are inevitable. The question is how your facility responds when they occur. For operations with 30–40kW of critical load—whether servers, production lines, or medical equipment—a 40kVA uninterruptible power supply offers a practical balance of capacity and cost.
This guide analyzes 40kVA UPS products from the buyer’s perspective, focusing on the most important practical specifications: input/output tolerance, actual load efficiency, battery flexibility, and scalability. In addition, this guide details configuration options, installation considerations, and communication interfaces—all of which affect initial investment and long-term ownership costs.
This article uses Banatton’s BT9040S(H)-33 as an example, but the framework applies to any similar 40kVA system. Whether comparing vendors or assessing capacity needs, this guide provides a clear, fact-based reference.
The BT9040S(H)-33 employs true double-conversion technology powered by advanced DSP (Digital Signal Processing) control. This combination ensures high performance stability, precise voltage regulation, and rapid response to input power disturbances. DSP technology guarantees real-time monitoring and adjustment of output parameters, maintaining output voltage within ±1% of nominal value during battery operation.
When operating in battery mode, this 40kVA UPS system produces a pure sine wave output with zero transfer time between AC mode and battery mode, with seamless transition in both directions (mains to battery and battery to mains). This 0ms transfer time is critical for sensitive equipment such as servers, medical devices, and industrial automation systems that cannot tolerate even momentary power interruptions.
The BT9040S(H)-33 accommodates a wide input voltage window of 190-520VAC (three-phase) at 50% load and 305-478VAC at 100% load. This broad input range allows the 40kVA uninterruptible power supply to maintain stable output even when utility power experiences significant voltage sags or surges, reducing unnecessary battery usage and extending battery life.
With an output power factor of 0.9 and active power factor correction (PFC) across all phases, the BT9040S(H)-33 achieves a power factor of ≥0.99 at full load. This high input power factor reduces strain on upstream distribution systems, lowers installation costs, and improves overall energy efficiency.
The ECO mode operation bypasses the double-conversion process when input power quality is acceptable, achieving up to 97% efficiency compared to 95.5% in standard AC mode. This feature is particularly valuable during periods of stable utility power, delivering measurable energy savings without compromising protection when it matters most.
The BT9040S(H)-33 is fully generator compatible, making it suitable for facilities that rely on backup generators during extended outages. The emergency power off (EPO) function provides a safety mechanism for quickly shutting down the UPS in emergency situations.
The 40kVA UPS accepts dual power inputs, allowing connection to two independent utility sources or one utility and one generator input. This configuration enhances system reliability through input source redundancy.
The LCD display clearly shows UPS status, load level, battery level, input/output voltage, discharge timer, and fault conditions, while also supporting parameter configuration. With the optional SNMP card, users can remotely monitor status in real time via web browser interface, enabling remote power management.
Standard configuration includes a full set of Schneider switches, covering Maintenance Bypass Breaker (MBB), User Input Breaker (UIB), Static Switch Input Breaker (SSIB), and User Output Breaker (UOB), ensuring high reliability and safety in power distribution. Standard circuit boards feature tri-proof coating protection against moisture, fungus, and salt spray, significantly enhancing long-term operational stability in harsh industrial environments.
Hot-swappable battery support enables battery replacement without system shutdown, ensuring continuous load power during maintenance. The cold start system allows the 40kVA uninterruptible power supply to start directly from batteries even without mains power, providing emergency power to connected equipment. Backup time can be customized according to user requirements.
| Parameter | Specification |
| Phase | 3-phase in / 3-phase out |
| Nominal Input Voltage | 3 × 400 VAC (3Ph+N) |
| Input Voltage Range | 190-520VAC @ 50% load; 305-478VAC @ 100% load |
| Input Frequency Range | 46-54 Hz or 56-64 Hz |
| Input Power Factor | ≥0.99 @ 100% load |
| Output Voltage | 3 × 360/380/400/415 VAC (3Ph+N) |
| AC Voltage Regulation (Battery Mode) | ±1% |
| Frequency Range (Synchronized) | 46-54 Hz or 56-64 Hz |
| Frequency Range (Battery Mode) | 50 Hz ± 0.1 Hz or 60 Hz ± 0.1 Hz |
| Current Crest Ratio | 3:1 (max.) |
| Harmonic Distortion | ≤2% THD (Linear Load); ≤4% THD (Non-linear Load) |
| Transfer Time | Zero (0ms), seamless bidirectional transition |
Standard Model (with internal batteries):
Long-Run Model (external battery support):
The BT9040S(H)-33 features an LCD display clearly showing UPS status, load level, battery level, input/output voltage, discharge timer, and fault conditions, with parameter configuration support. Communication interfaces include:
The BT9040S(H)-33 provides centralized power supply for workstations and departmental facilities in medium and large data centers. Its 36KW real power output can support multiple server racks, networking equipment, and storage systems, ensuring business continuity during power disturbances. With web-based remote monitoring, IT administrators can maintain real-time visibility into every UPS in their infrastructure.
Industrial automation equipment and SMT placement machines require stable, clean power to maintain precision operation. Voltage sags, harmonics, and electrical noise common in industrial environments can cause production errors or equipment damage. The tri-proof coating on circuit boards ensures this Three Phase UPS operates reliably in challenging industrial conditions.
Transmitter stations, control rooms, and medical equipment demand the highest power quality standards. The pure sine wave output and zero transfer time make the BT9040S(H)-33 suitable for MRI machines, CT scanners, laboratory analyzers, and other critical healthcare applications where power interruptions are unacceptable.
Monitoring and security systems and information centers rely on continuous power to maintain surveillance coverage and data collection. The 40kVA uninterruptible power supply ensures these systems remain operational during outages, maintaining facility security and operational visibility.
Mining, chemical, and petrochemical production equipment operates in demanding environments where power quality can be unpredictable. The wide input voltage range, generator compatibility, and full Schneider switch configuration make this product suitable for these harsh applications.
Any other valuable equipment where power outages are not permitted can benefit from 40kVA UPS system protection. This includes telecommunications infrastructure, airport navigation systems, financial trading platforms, and emergency response systems.
The BT9040S(H)-33 supports parallel operation of up to 3 units, allowing facilities to scale capacity or achieve N+X redundant system design. This parallel capability is consistent across the BT900-33 series up to 120KVA models, with larger models supporting up to 2 units in parallel.
The BT900-33 series offers seamless capacity expansion from 10KVA to 200KVA, allowing facilities to start with a single 40kVA UPS and add parallel units as power requirements grow. This scalability protects the initial investment while providing flexibility for future needs.
The maintenance bypass function allows the 40kVA uninterruptible power supply to be serviced without interrupting power to connected loads. The standard full set of Schneider switches (MBB/UIB/SSIB/UOB) ensures safe and reliable bypass operations. An optional isolation transformer offers full isolation and complete common-mode noise rejection, providing an additional layer of protection for sensitive equipment.
| Model | BT9040S(H)-33 Standard | BT9040S(H)-33 Long-Run |
| Dimensions (D×W×H) | 815 × 300 × 1000 mm | 815 × 300 × 1000 mm |
| Net Weight | 225 kg | 61 kg |
The 40kVA UPS system is available in carton or wooden box packaging, with options to meet customer specifications. Banatton’s supply capability of 2,000 units per month ensures reliable availability for large-scale deployments.
The BT9040S(H)-33 40kVA uninterruptible power supply offers a balanced combination of power capacity, efficiency, and reliability for industrial and data center applications. Its true double-conversion topology with DSP control delivers clean, stable power with zero transfer time, while the wide input voltage range and generator compatibility ensure reliable operation across diverse power environments. BT9040S(H)-33 is independently manufactured by Banatton. As a professional UPS manufacturer, the company offers complete delivery solutions ranging from standard models to OEM/ODM customizations.
Key decision factors for selecting this 40kVA UPS system:
If you are interested in our products, please feel free to contact us for a quote.
26Sep
26Sep
26Sep
26Sep
