Duplex Isolated Power Panel - Model DIDP

The Duplex DIDP Isolated Power Supply System contains two independent Isolated Power Systems within one enclosure. The DIDP Panel simplifies installation, maximizes available space and provides up to 32 branch circuits to a single room. The dual feed design has an internal separation barrier and is suitable for distributing both normal and emergency circuits from one enclosure.

The DIDP is typically used in hospital operating rooms and other wet procedure locations with load requirements exceeding 10kVA, or 16 circuits. Any combination of transformer sizes up to 20kVA total capacity can be specified.

Panel Sizing

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Features

All DIDP Isolated Power Panels include:

Hospital Grade Isolation Transformer:

• Standard sizes for each section range from 3 to 10 kVA or up to a combined maximum of 20 kVA
• Primary voltages: 480, 380, 277, 240, 230, 220, 208, 120, or 110 VAC, 1-phase
• Secondary voltages: 240, 230, 220, 208, 120, or 110 VAC, 1-phase
• Low leakage, electrostatically shielded primary and secondary windings
• 220°C Class R Insulation
• Clamped and bolted design with anti-vibration mounting bushings for quiet operation
• Designed and built in accordance with UL and CSA Standards
• 50Hz available (optional)

Mark V Line Isolation Monitor (LIM):

• Continuous hazard current monitoring
• Digital processing with self-test/self-calibration feature
• Large, multi-line LCD simultaneously displays all critical system parameters
• Multiple remote annunciator options available
• Optional transformer temperature and load monitoring
• Optional LIM-Connect™ Software

Interior Chassis:

• Engineered to order, completely factory assembled, and 100% tested
• Primary main circuit breaker
• Up to 32 factory installed 120V, two-pole, bolt-on branch circuit breakers
• Copper ground bus
• Terminal strip for connecting Remote Annunciator(s)
• Customer may specify standard circuit breakers from Eaton, GE, Siemens, or Schneider Electric for consistent coordination or to maintain facility standard

Enclosure and Trim:

• Heavy-duty galvanized steel back box designed for flush mounting; can be shipped ahead of interior during rough-in
• Stainless steel front trim panel with fully hinged, door-in-door construction reduces damage and potential injuries during installation, testing, and maintenance
• Surface mounting options available
• LIM viewable through front trim

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Installation

• Special low leakage wire should always be used for the powered conductors of branch circuit wiring. XPLE type insulation such as XHHW-2 wire is recommended with a dielectric constant of less than 3.5. Standard type insulation such as THHN is appropriate for the incoming primary and the ground wires only.
• Code (NFPA 70 ‐ Article 517.160) requires secondary circuits to be colored brown and orange, with a distinctive stripe in a contrasting color. The brown wire is connected to the L2 bus and the hot side (brass screw) of a standard NEMA receptacle. The orange wire, L1 is connected to the silver screw where neutral would be connected. Polarity should be maintained throughout the installation.
• Conduit runs for branch circuits should be as short and direct as possible to minimize accumulated leakage current in the circuit conductors. Generally, 400‐450 feet is the maximum recommended cumulative length for all branch conductors from a single transformer. Avoid unnecessary bends and junctions.
• Do not use pulling compounds to lubricate inside of conduit. This will break down the insulation properties and raise leakage current. A dry talc powder may be used. It is typical to use conduit with a slightly larger diameter to ease pulling and avoid damage to wire insulation. An interior coating of PVC may also be used.
• Isolated power circuits must be kept separate from other circuits. Do not share conduit or raceway with non‐isolated circuits, or isolated circuits from another system.
• Each receptacle and equipment grounding connector must be connected back to Reference Ground Bus inside Isolation Panel to maintain Equipotential grounding system. If multiple panels serve the same space, they must be bonded together.

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Certifications

PG LifeLink Isolated Power equipment is designed, built, and tested in accordance with the following: 

• UL 1047, UL 1022, UL 50
• CSA C22.1 Part 1, and CSA C22.2 No. 204
• IBC (2012), AC156 (2010), ASCE 7-10 
• OSHPD (State of California), OSP-0210-10

PG LifeLink Isolated Power Systems UL Certification document
PG LifeLink Isolated Power Panel IBC 2018 Seismic Certification - For more information, click here.

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