PET3330B three phase touch LCD 30kva ups battery backup power

Orson Zhong

1 week ago

Prostar PET3330B three phase touch LCD 30kva ups battery backup power combines a transformerless, high-efficiency design with advanced protection. This 30kva ups battery backup has a true unity output power factor. It provides a full 30kW of usable real power. This is ideal for modern high-density IT environments and data centers. The online ups is also suitable for medical facilities, commercial buildings, and other demanding loads.

Utilizing true online double-conversion architecture, the 30kva ups battery backup continuously converts incoming AC power to DC and back to AC. This provides complete galvanic isolation from utility disturbances such as surges, sags, spikes, noise, and frequency variations. It ensures a stable, clean sine wave output. There is zero transfer time during power outages, offering seamless protection of sensitive equipment.

Prostar PET3330B three phase touch LCD 30kva ups battery backup power supply

30kVA UPS Battery Backup Key Features

True Online Double Conversion Technology

Ensures continuous, clean, and fully isolated power by continuously converting input AC to DC and back to AC, protecting connected loads from all types of utility disturbances.

3-Phase Input / 3-Phase Output Design

Ideal for balanced three-phase loads in medical, commercial, and IT environments.

Wide Input Voltage and Frequency Range

Maintains stable operation under unstable grid conditions, reducing battery usage and extending battery life.

Parallel Operation Capability

Supports multiple units in parallel for capacity expansion or N+1 redundancy, enhancing system availability.

Transformerless High-Efficiency Design

Compact structure with reduced weight and higher efficiency, lowering energy consumption and total cost of ownership.

User-Friendly LCD Display and LED Indicators

Real-time monitoring of system status, alarms, and electrical parameters for easy operation and maintenance.

UPS Power Supply Connection Diagram

The online double-conversion UPS acts as the core of the system. It continuously converts incoming AC power to DC. Then it converts the DC back to clean, regulated AC power. This design fully isolates the load from input power disturbances such as voltage fluctuations, frequency variations, and electrical noise.

An external battery bank or battery cabinet is connected to the UPS to provide uninterrupted backup power during mains failure. The UPS automatically switches to battery mode without interruption, ensuring continuous operation of connected equipment.

The conditioned and regulated output power from the UPS is delivered to various critical loads. This includes servers, data centers, security systems, networking equipment, and industrial devices. This ensures maximum protection and reliability.

UPS Uninterrupted Power Supply Details

Rear Panel Shown

1. SNMP intelligent slot	2. Cold start function	3. RS485 communication port
4. RS232 communication port	5. USB communication port	6. Emergency power off function connector
7. Share current port(only for parallel model)	8. Parallel port (only for parallel model)	9. Line input circuit breaker/switch
10. Manual bypass switch (10kVA – 40kVA optional configuration)	11. Output switch	12. Maintenance bypass switch
13. Line connection terminal	14. Bypass input terminal (10kVA-40kVA optional configuration)	15. Battery switch

Rear Panel Connection Terminal

Parallel Wiring Diagram

Dual Input in Parallel Operation

Built-in Battery Inside

30kVA UPS with 64 units 12V 9AH VLRA battery

LCD Display

DC Settings Shown

Battery Mode

UPS Specifications

Rated Capacity

Power Range: 30kVA/30kW
Output Power Factor: 1.0

AC Input

Input Phase: Three-phase (3P + N + PE)
Nominal Voltage: 380 / 400 / 415 Vac
Voltage Range: 110Vac – 300Vac (P-N)
Frequency: 50 / 60 Hz (auto-sensing)
Power Factor: ≥ 0.99
Input THDi: ≤ 3%

AC Output

Output Phase: Three-phase (3P + N + PE)
Output Voltage: 380 / 400 / 415 Vac
Voltage Regulation: ±1%
Frequency Accuracy:
- Utility mode: synchronized to input
- Battery mode: ±0.1Hz
Waveform: Pure sine wave
Total Harmonic Distortion (THDv):
- Linear load: ≤ 2%
- Non-linear load: ≤ 5%

Battery

Battery Type: VRLA / External battery bank
Battery Configuration: Built-in 32x12V 9AH VRLA Battery x 2 Groups
Charging Method: Intelligent multi-stage charging

Parallel Operation

Parallel Capability: Up to 4 units
Parallel Mode: Capacity expansion or N+1 redundancy

Communication & Monitoring

Display: LCD + LED indicators
Standard Interface: RS232 / RS485 / USB
Optional Interface: SNMP, WiFi, GPRS, Dry Contact
Monitoring: Local and remote real-time monitoring

Mechanical

Design: Transformerless, high-frequency
Installation: Tower / Cabinet type
Cooling: Intelligent forced air cooling
Protection Level: IP20
Dimension: 250x828x863mm

Step-by-Step Installation Guide

1. Unpacking and Inspection

Carefully unpack the UPS on a stable surface. Check for shipping damage (dents, scratches, loose parts). Verify all accessories: user manual, parallel cables (if applicable), communication cables, mounting hardware, and terminal covers. Report any issues to the supplier immediately. Do not install a damaged unit.

2. Site Preparation and Placement

Select a level, stable floor capable of supporting the UPS weight.
Ensure minimum clearances for ventilation and service access.
Position the UPS for easy front access to the touch LCD panel and rear/bottom/top cable entry.
If floor-standing, secure with anchor bolts if required by local seismic codes.

3. Electrical Preparation

Confirm input: 3-phase + neutral + PE (380/400/415V typical, wide range tolerance).
Output: 3-phase + neutral + PE.
Install upstream protective devices: suitable MCCB or fuse for input (rated for full load current + inrush), bypass line (if dual input used), and output distribution.

4. Power Connections (Input, Output, Battery, Ground)

Open the rear or bottom access panel to expose input/output/battery terminals (typically busbar style).
Grounding (PE): Connect protective earth first—use the dedicated PE terminal/bolt. Ensure low-impedance grounding to building ground.
Input (L1, L2, L3, N): Connect 3-phase input cables. Tighten terminals to manufacturer torque values (typically 20–40 Nm for M8–M12 bolts; check exact label).
Output (L1, L2, L3, N): Connect to critical load distribution panel.
Battery (+ and –): Built-in battery inside, no need to prepare extra battery bank.
For parallel systems: Connect parallel communication cables (share current / parallel ports) between units before powering on.

5. Optional Connections

EPO (Emergency Power Off): Connect dry contact if required.
SNMP/monitoring card slot (if equipped): Install optional card for remote monitoring.
Dry contacts / RS232 / USB for BMS integration.

6. Final Checks Before Power-Up

Double-check all connections for tightness, correct polarity, and phase sequence (use phase rotation meter).
Verify no tools or debris left inside cabinet.
Close all panels and secure covers.

7. Initial Power-Up and Commissioning

Close upstream input breaker → UPS starts in bypass or online mode (LED/LCD indicates status).
Connect batteries last: close battery breaker → UPS detects DC voltage and may charge batteries.
Use the touch LCD to enter setup menu: set date/time, language, equalization charge if needed, parallel mode (if applicable).
Perform battery test via LCD menu.
Transfer to online mode (inverter on).
Gradually apply load and monitor for alarms.
For parallel setups: Follow Prostar parallel commissioning sequence (master/slave designation, current sharing verification).

Troubleshooting (brief)

No output: check bypass status, input breaker, internal alarm codes.
Short runtime: check battery charge, battery age, temperature, and connection integrity.
Alarms during commissioning: consult event code list and Prostar support.