Power Distribution Boards PR11 — 0.4 kV

Purpose of the PR11

A PR11 power distribution board is a metal enclosure for receiving and distributing electricity in 0.4 kV networks (380 V, 50 Hz). Inside there is an incoming device — a circuit breaker or a switch-disconnector — or an intake onto busbars, followed by a group of breakers on the outgoing lines. The PR11 has no control circuits — it is a distribution board rather than a control panel, and that is exactly what separates it from ventilation or pump control panels.

A PR11 is used where several separately protected lines have to be taken from a single supply intake: workshops and production areas, boiler and pump houses, construction sites, supply nodes for process equipment.

Versions

• wall-mounted enclosures — compact, fixed to a wall or a support structure;
• floor-standing enclosures — when there are many lines and devices, or the incoming current is high;
• IP54 — for damp premises; IP31 — for dry indoor premises;
• outdoors — yes, in the U1 version (agreed in the questionnaire);
• the incoming device and the ratings of the outgoing lines follow your project or questionnaire.

What we have built

We describe delivered orders by their composition — by what is actually fitted inside the board.

• 100 A: incoming three-pole 100 A breaker and 13 outgoing three-pole lines (nine rated 10 A, three 20 A, one 50 A), IP54, enclosure 650×600×150 mm, 2023.
• 400 A: load connection board — a single moulded-case 400 A breaker (36 kA), IP54, enclosure 800×800×400 mm.
• 630 A: IP31, indoor version, 2025.
• Beyond the standard range — up to 1600 A: 1600 A busbar intake, five outgoing lines rated 160…400 A (50 kA), enclosure 1800×1000×350 mm.

LK Energy Group has been manufacturing switchgear equipment at its own factory in Odesa since 2015 (company since 2005). Every board leaves the factory with a product passport and a circuit diagram; the acceptance test report is provided on request.

Typical composition of a PR11

QF1

incoming device — a circuit breaker or a switch-disconnector, rated to the calculated incoming current; some schemes of the series have no incoming device, the supply lands directly on the busbars;

QF2…QFn

circuit breakers on the outgoing lines — quantity, ratings and pole count to project;

XT

N and PE busbars and terminals;

—

no control circuits (the passports leave the «control circuit voltage» field blank).

Configuration examples from delivered work

• 100 A: incoming — a three-pole 100 A breaker (10 kA, curve C); outgoing — three-pole breakers of 10 A ×9, 20 A ×3, 50 A ×1. Thirteen lines from a single supply intake.
• 400 A: load connection board — a single moulded-case three-pole 400 A breaker with a breaking capacity of 36 kA, no outgoing lines.
• 1600 A: 1600 A busbar intake; lines — moulded-case three-pole breakers of 400 A ×3, 250 A and 160 A, all with a breaking capacity of 50 kA.

The circuit diagram for the specific version is supplied with the product passport.

Standard schemes of the PR11 series

Scheme numbering in the PR11 (Ukr. ПР11) series is standard: we build to the scheme number from your project. The final composition — incoming device, the number and pole count of the lines, ingress protection, version — is fixed in the questionnaire and in the circuit diagram supplied with the product passport. If the range has no scheme that fits, we build to your own set of outgoing lines. Every scheme in the series is for a three-phase 380 V intake.

Main parameters of the PR11

Dimensions, weight and configuration are indicative, based on delivered work. Final parameters are agreed at the questionnaire stage.

Scope of supply

• the PR11 board in accordance with the contract and the questionnaire — 1 pc.;
• product passport — 1 pc.;
• circuit diagram — 1 pc.

The acceptance test report is provided on request.

What is selected for the project

• rating of the incoming device by the calculated current;
• quantity, ratings and pole count of the outgoing lines;
• ingress protection IP54 or IP31 — by installation site;
• wall-mounted or floor-standing version, enclosure dimensions;
• enclosure colour — to order (RAL to project).

Not intended for operation

• in environments with conductive dust, caustic vapours or gases that destroy metal and insulation;
• in places subject to heavy shaking, vibration or impact;
• on mobile installations.

Warranty

Warranty on the product — 2 years (extended to 5 years by agreement); the enclosure metalwork — 10 years*. The design service life to write-off is 25 years, provided that components with a shorter service life are replaced.

*Approximate terms and conditions. The exact warranty period is set in the supply contract.

A PR11 (ПР11, ПР-11 on the nameplates) power distribution board is an enclosure for receiving and distributing electricity in 0.4 kV networks (380 V, 50 Hz): an incoming device — a circuit breaker, a switch-disconnector or an intake onto busbars — and a group of breakers on the outgoing lines, with no control circuits. We build to any scheme of the standard series range — up to 630 A — or to your own set of lines; beyond the range, delivered work includes an assembly of 1600 A. The rated current is selected from the calculated incoming current: delivered work runs from 100 A in a 650×600×150 mm enclosure to 1600 A in an 1800×1000×350 mm enclosure. Ingress protection is IP54 for damp and outdoor conditions or IP31 for indoor premises; the climatic version is U3 with an operating range of −40 to +40 °C, and U1 to order for outdoor installation. LK Energy Group is a switchgear manufacturer from Odesa: the company has operated since 2005 and its own factory since 2015; every board ships with a product passport and a circuit diagram, with the test report available on request. Price on request.