Life-Critical Power for Group 2 Medical Locations
Operating theatres and intensive care units are classified as Group 2 medical locations under IEC 60364-7-710 — spaces where the failure of the electrical supply could endanger the life of a patient. In these environments, the UPS system is not a convenience; it is a medical device in all but name, subject to the same rigorous standards of safety, reliability, and testing as the surgical equipment it powers.
PARWATT medical-grade UPS systems are designed and certified for Group 2 medical locations, with galvanic isolation transformers, medical-grade earth leakage monitoring, and full compliance with HTM 06-01 (UK Health Technical Memorandum) and IEC 60364-7-710. Every unit is factory-tested under simulated load and fault conditions before delivery, and every installation includes on-site commissioning with documented acceptance test results.
Galvanic Isolation: The Critical Safety Barrier
The defining feature of a medical-grade UPS is the isolation transformer integrated into the power path. In the event of a primary-side fault, the galvanic isolation barrier prevents fault currents from reaching patient-connected equipment. PARWATT medical UPS systems include a double-wound isolation transformer with electrostatic shielding as standard, with output windings configured as an IT (isolated terra) system — the required earthing arrangement for Group 2 medical locations.
Integrated insulation monitoring devices (IMDs) continuously measure the impedance between each output conductor and earth, generating alarms at pre-configured thresholds long before an insulation fault could develop into a dangerous condition. The IMD status is displayed on the UPS front panel and relayed to the hospital’s building management system via dry contacts and network protocols.
Comprehensive Power Quality for Sensitive Medical Equipment
Modern operating theatres contain an array of equipment sensitive to power quality: anaesthesia machines, electrosurgical units, imaging systems, and patient monitors. PARWATT medical UPS systems deliver pure sine wave output with total harmonic distortion below 2% under all load conditions — linear and non-linear. Double-conversion online topology ensures that the load sees clean, regulated power regardless of input quality, with zero transfer time to battery in the event of a mains failure.
For hospital-wide deployment, PARWATT offers centralised UPS solutions serving multiple theatres and ICU bays from a single system, as well as distributed configurations with dedicated UPS units per theatre for maximum fault isolation. Both architectures comply with HTM 06-01 requirements for physical separation of essential and non-essential circuits.
Testing, Maintenance, and Compliance Documentation
HTM 06-01 and IEC 60364-7-710 mandate regular testing of medical power systems. PARWATT medical UPS units include automated self-test routines — battery discharge tests, earth leakage checks, and IMD functional verification — that can be scheduled and executed without clinical staff intervention. Test results are logged with timestamps for compliance audits and CQC inspections.
Our service team provides annual preventative maintenance visits as standard, with 24/7 emergency response available under extended service agreements. Every maintenance action is documented in a compliance-ready format accepted by NHS trusts and private hospital groups.
Protect patients, surgeons, and your hospital’s regulatory standing. Contact PARWATT to discuss your medical power requirements.
