FAQ: Power Communication Inverter Guide
Last updated 2026-08-25
A power communication inverter converts DC power from station battery banks (typically -48VDC, 110VDC, or 220VDC) into clean 220VAC to supply critical communication and automation loads in electric utility environments. High Idea Power Inverter solutions are deployed in power line carrier (PLC) stations, fiber optic repeater sites, microwave relay stations, and SCADA RTU remote terminal units.
1. What DC input voltages are supported?
| DC Input | Model Series | Power Range | Input Range |
|---|---|---|---|
| -48VDC | H1K-48, H3K-48, HB Series | 1–10KVA | 36–60VDC |
| 110VDC | H1K-110, H3K-110, HB Series | 1–10KVA | 90–132VDC |
| 220VDC | H1K-220, H3K-220, H6K-220, H10K-220, HB Series | 1–10KVA | 180–280VDC |
HB Series pure sine wave Inverter spans 1KVA to 10KVA (800W–8000W), output 220VAC ±2%, efficiency >88%. H Series: compact 2U rack-mount (88mm), RS232 + intelligent slot for SNMP.
2. How are inverters integrated with communication site power?
Three elements: Rectifier/charger (RT-4860, 54Vdc, 91% efficiency, -40°C to +65°C) converts AC to DC. LD48 Series Lithium Battery (LD4810–LD4850PRO, 48V 10AH–50AH, 19-inch rack, built-in BMS) stores energy. Inverter (H/HB Series) converts DC to 220VAC. During grid failure, the battery seamlessly supplies the Inverter with zero transfer interruption.
3. What equipment is typically powered?
Protection relays, SCADA RTU / remote terminal units, power line carrier (PLC) terminals, fiber optic multiplexers, industrial Ethernet switches, IEDs in digital substations, event recorders and fault locators. Output THD <3% (linear load), safe for sensitive microprocessor-based devices.
4. Redundancy and reliability features?
HM Series parallel inverter (HM3K–HM15K, 3KVA–15KVA) supports N+1 parallel configuration with transfer time <4ms, meeting IEC 61850-3. Input PF ≥0.99, operating -33°C to +40°C, RS485 + dry contacts. 48VDC input (43–58VDC), ≤3% THD pure sine wave output.
5. Communication and monitoring interfaces?
RS232 DB9, RS485 / MODBUS RTU for SCADA, SNMP card slot (Ethernet), dry contacts (AC fail, battery low, inverter fault), LED/LCD front panel with real-time V/A/Hz/load/battery display.
6. Standards compliance?
IEC 61850-3 (EMC, temperature, humidity, vibration for substation equipment). Galvanic isolation between DC input and AC output. Protection: DC over/under-voltage, overload (105–125% for 1 min), short circuit, over-temperature, reverse polarity.
7. How to select the right inverter?
- Determine DC bus voltage (48V/110V/220V). 2. Sum AC load wattage + 20–30% margin. 3. Select form factor: H Series 2U rack, HB Series higher density, HM Series N+1 parallel. Example: 48VDC site powering switches (200W), RTU (150W), PLC terminal (250W) = 600W → H3K-48 (3000VA/2400W, 36–60VDC input).