Vacon PA003155H1SSV Inverter Power Unit Product Description

Overview

Vacon PA003155H1SSV is the power unit section for the Vacon NXS series frequency converter. This Vacon inverter power unit undertakes rectification, IGBT power switching and output power drive, and must be matched with the separate control board CSAVA1A2000000 to form a complete Vacon NXS00315A5H1SSV frequency converter. PA003155H1SSV is widely used for industrial, marine and water pump variable speed drive renovation, as well as spare‑part replacement of old NXS power units.

Features

Vacon PA003155H1SSV inverter power unit integrates power rectifier bridge, IGBT power module, snubber circuit and current sampling detection circuit. This Vacon power unit supports wide three‑phase AC input and variable frequency variable voltage output for asynchronous motors. PA003155H1SSV carries built‑in temperature sensors for IGBT overheat protection and current transformers for overcurrent and short‑circuit detection. The Vacon power unit is designed with an internal cooling fan and heat sink structure for continuous heavy‑load operation. This Vacon power unit adopts IP54 / NEMA12 rated enclosure when fully assembled, suitable for workshop and marine cabin environments.

Specs

Vacon PA003155H1SSV inverter power unit

• Brand: Vacon (Danfoss Vacon)

• Series: NXS

• Model: PA003155H1SSV

• Input: 3‑phase 380–500 V AC, 50/60 Hz, 31 A

• Output: 3‑phase 0–U1, 0–320 Hz, 23 / 31 A

• Cooling: Forced air cooling

• Protection: IGBT overtemperature, overcurrent, short‑circuit detection

• Matching control card: CSAVA1A2000000

• Complete inverter model: NXS00315A5H1SSVA1A2000000

• Weight: Approx. 11 kg

Principle

Vacon PA003155H1SSV inverter power unit converts three‑phase AC input into DC voltage via the rectifier section. The control board sends PWM drive signals to the IGBT module, and the IGBT bridge converts DC bus voltage into adjustable frequency and adjustable amplitude three‑phase AC output to drive the motor. Current sampling and temperature signals are fed back to the control board for closed‑loop current control and fault protection. When overcurrent, short‑circuit or overheating occurs, the control board blocks the PWM signal and triggers fault alarm to protect the power devices.

Applications

Vacon PA003155H1SSV inverter power unit is widely used in water supply pumps, fans, marine auxiliary machinery, metallurgical conveyors and general industrial variable speed systems. This Vacon power unit serves as the power core of the NXS inverter for energy‑saving speed regulation of AC motors. PA003155H1SSV fits marine electrical overhaul, frequency converter maintenance and spare replacement of legacy Vacon NXS drives.

Installation & Maintenance Notes

Follow official Vacon NXS service manuals during installation of Vacon PA003155H1SSV inverter power unit. Confirm the matching control card model before commissioning; mismatched control boards will lead to startup failure. Check the tightness of power terminals and cooling fan operation regularly, especially in dusty and high‑humidity marine environments. Inspect IGBT temperature and capacitor aging status periodically. Back up inverter parameters before power unit replacement. Confirm exact part number PA003155H1SSV during spare‑part swap‑out to ensure current rating, voltage class and control interface compatibility.