This document and its content, is for authorized company use only1.1 Objective This document establishes the requirements for design, construction and testing of UPS systems for offshore/onshore units.The UPS system (DC / AC) normally consists of rectifier, inverter, battery and main distribution board (DC UPS without inverter).The requirements specified in this document should complement the governing regulations, national and international standards relevant for UPS system.SR-41459 - This document gives the supplementary requirements to IOGP S-701, S-702 and S-740 specification and datasheet ST520 , ST519 and ST517. The IOGP QRSs are replaced by Ch.4 in this document.The references listed in each clause are guides to standards with the requirements for the actual subject.Requirements in other standards are not limited to these references. The content in this document mainly specifies:Specific IEC requirements in more detail Which one out of several optional IEC alternatives to be used Requirements not covered in IEC Alternative requirements to the requirements described in IEC1.2 Target group The target group is personnel involved in selection, engineering, procurement and manufacturing of UPS systems.1.3 Provision Provision is made in Management System (TR3020 Electrical, technical requirements and standards).Single DC UPS system A single DC UPS system is a complete system for transformation of AC supply voltage to DC voltage with a battery bank to obtain UPS in main power failure situations.A single DC UPS system includes the following:Rectifier input isolating switch Isolating transformers for main incomer Rectifier Battery with battery racks Battery circuit breaker with trip facilities Main distribution board Incomer switch-disconnector for main distribution board Capacity discharge test facilities for batteries Black start facility from battery (when the main supply is not available) Insulation monitoring system Provisions for remote monitoring Mimic diagram on frontParallel DC UPS system A parallel DC UPS system consists of two single DC systems working in parallel or as separate systems connected to a common or separate DC main distribution board.Each of the two single systems forming the parallel system includes the same items as a single DC UPS system.Single AC UPS system A single AC UPS system is a continuous duty, on-line, solid state system providing AC power to a main distribution board.A single AC UPS system includes the following:Rectifier and bypass input isolating switch Isolating transformers for main incomer and bypass Rectifier Battery with battery racks Battery circuit breaker with trip facilities Inverter Static bypass switch Manual bypass switch Main distribution board Incomer circuit breaker for main distribution board Capacity discharge test facilities for batteries Black start facility from battery (when the main supply is not available) Insulation monitoring system Provisions for remote monitoring Mimic diagram on frontSR-41477 - Parallel AC UPS system A parallel AC UPS system shall be two single AC systems, each connected to separate AC main distribution boards. If specified the two single systems shall be connected to a common AC main distribution board. The two AC main distribution boards shall have interconnection and synchronising facilities included to allow the two systems to operate in parallel. Each system shall be rated for 100% of the specified load.3.1 General SR-41483 - The UPS unit shall have a static switch arrangement for automatic no break transition to bypass supply in case of inverter failure, short circuit, voltage out of tolerances on the ‘Secure Bus’ etc.SR-41485 - For parallel UPS systems, it shall be possible to remove one UPS unit for replacement without downtime on the distribution board.SR-41486 - For single AC UPS system, a switch facility between rectifier supply and bypass supply shall be provided. An interlock should be implemented to ensure that one incomer open before permission is given to close this switch. The switches shall be manually operated only, lockable and clearly marked.3.2 Enclosures Component IP should be according to TR3120 chapter 4.3. There should be provision for cleating of incoming external cables according to TR3120 4.6.3.3 Arrangement SR-41500 - All components in the panel fronts shall be flush mounted, and be mounted in the upper half of the front.SR-41502 - Bus bars shall be made of electrolytic copper.Requirements for thermographic inspection on live equipment are provided in TR3120 chapter 3.9.SR-41505 - Output terminals in the UPS unit and input terminals in the main distribution board shall be equipped with duplicated terminals for future modification purposes.SR-41526 - The UPS system shall withstand a minimum load crest factor of 3:1 (Ipeak/Irms).3.4 Wiring Internal wiring shouldbe according to TR3120 chapter 4.10 and wiring identification according to TR3120 chapter 4.11.SR-41508 - All installation of primary wiring to equipment such as fuses, circuit breakers and measuring devices in connection with main circuits shall be made short circuit proof.SR-41509 - All internal cables between shipment sections shall be premade, marked, terminated and coiled in one of the sections.3.5 Terminals Terminals and terminal blocks should be according to TR3120 chapter 4.6.3.6 Circuit breakers, Relays and ContactorsDB See TR3121 chapter 4.5. Circuit breakers should be equipped with alarm contact.3.7 Earthing Protective earth bar (PE) and Instrument earth bar (IE) should be installed according to TR3120 chapter 4.8.3.8 Harmonic and ripple limitations With reference to harmonic distortion requirements in IEC 61000-2-4 clause 6, class 1 requirement apply for the UPS system. See also IEC 61892-2, clause 10.7 and IEC 61892-1, clause 4.5.2.3.SR-41525 - The harmonic current feedback into the supply network shall, in normal operation, be limited to a crest factor (Ipeak/Irms) of 2 unless otherwise stated in data sheet.3.9 Electromagnetic compatibility (EMC) References: IEC 61000-2-4 IEC 61892-2 IEC 62040-23.10 Rectifier SR-41538 - The rectifier shall be capable of supplying the DC load with the battery disconnected, within the operational limits, and with due consideration to ripples, harmonics, over voltage etc. as specified in the data sheet.SR-41544 - Functionality shall be provided to keep the load voltage within +/- 10% of the nominal voltage during all charging conditions on DC systems. Different load voltage limits may be necessary for particular applications.SR-41546 - The following local alarms shall be provided as a minimum, and be displayed on the front of the panels:Rectifier failure Rectifier fuse failure DC-over voltage (Pre-warning (H), Rectifier shutdown (HH)) DC-under voltage Over temperature, (Pre-warning (H), Rectifier shutdown (HH)) Main supply failure Battery breaker/fuse failure Earth faultSR-41547 - The following local status signals shall be provided as a minimum, and be displayed on the front of the panels:Main supply "ON" Battery switch "ON" Battery on normal charge Battery on boost/quick chargeSR-41548 - For DC UPS systems in parallel mode the following apply:If the UPS system has two parallel rectifiers, the normal operation shall be that both rectifiers are working in parallel supplying the DC load and in addition float charging the battery. If one rectifier fails then the remaining rectifier shall be rated to supply the total DC load and its own battery float charge requirements. Parallel rectifier units shall be designed so that during parallel operation, load sharing shall occur. The difference between the rectifiers DC current shall not exceed 10 % of the rated current for one rectifier.3.11 Battery, racks, circuit breaker References: DNV GL RU Ship Pt.6 Ch. 2, Section 2 IEC 62485-2 IEC 60623 IEC 60896-11 IEC 60896-21 IEC 60896-22 IEC 61892-3 clause 9 IEC 61892-6 clause 9 IEC 61892-7 clause 26 IEC 62619Important factors to consider regarding battery design are capacity, lifetime, load profile, temperature, charging condition, available space and weight capacity. The calculated discharge time should decide if the battery should be of the normal type, the high energy type or the high power type.3.11.1 Batteries SR-95082 - The battery cells shall be Nickel Cadmium, Lead-Acid,or Li-ion type and the requirements in IOGP S-740 shall also apply for Li-ion type battery. The battery type should be selected to minimize space, weight and maintenance.Reference is made to TR3120 Chapter 3.1 with regards to degree of protection.SR-41563 - Emergency batteries shall have a capacity to supply emergency power for a period of minimum 30 minutes, ref. ISO 13702, table C1. UPS for emergency lighting shall have a capacity of 60 minutes, ref. EN1838 section 4.2.5. These batteries shall be dimensioned tosupply rated load for 30 or 60 minutes (according to requirement above) when charged to 90% of rated capacity at an ambient temperature of 5°C throughout the specified lifetime.An alarm indicating rectifier fault may be implemented instead of discharged battery alarm. References are made to 3.11 in this document.SR-41567 - Transparent containers are not applicable for other batteries than those requiring refilling of electrolyte. Lead-Acid battery shall be provided with Ex-plugs to secure easy and safe check of electrolyte weight.Individual cell voltages in a battery should not deviate by more than 15 mV when delivered from manufacturer (new).SR-41570 - The torque values on battery poles shall be specified and clearly marked on each battery cell or battery bank rating plate.3.11.2 Battery racks Best practice for selection of the battery rack type in order to minimize maintenance scope and complexity should consider the following:All cells or modules to be easily lifted out All cells or modules to be easily available for measurements (electrolyte weight, voltage etc.) Electrolyte level to be visible without moving any cell (For relevant batteries) Minimum of floor space and weight3.11.3 Battery circuit breaker If 24 V DC internal control voltage is available in the UPS unit, this voltage is recommended used for battery breaker trip coil (UVT). However, this is based on that the control voltage extinguishes short time after the UPS shut down and that the voltage is restored before closing the battery breaker (e.g. by charging the UPS DC circuit by use of UPS rectifier or charging the DC circuit from battery via push button and resistor in parallel with battery circuit breaker).SR-41580 - The tripping of the battery breaker shall be controlled by an adjustable time relay located in the UPS or in an external battery breaker.The time relay shall have the following three inputs:The time relay shall have a lockable manual override switch. A local alarm shall be provided to show status of this manual override switch.SR-97865 - If the battery circuit breaker is part of a safety instrumented function the delivery shall be:compliant with IEC 61508 or proven in use/prior use in accordance with IEC 61508/IEC 61511and in accordance with the SIL requirement of the Safety instrumented function as specified in the data sheet and the Safety Requirement SpeciificationNote: the Safety Requirement Specification (SRS) is a document provided by the purcharser (ref. IEC 61511-1 10.3)3.12 Inverter SR-41590 - The inverter shall be designed to supply a load consisting of 100 % switched-mode power supplies.SR-41593 - The inverter shall meet the dynamic voltage/ frequency requirements in table 1 regarding connection/disconnection of load.3.13 Bypass Transformer The transformer short circuit impedance should be chosen with regards to voltage drop in the transformer and the short circuit level on the UPS main distribution board.3.14 Static transfer switch SR-41605 - In case of inverter failure, the static transfer switch shall transfer the load from the inverter to the bypass circuit. The monitoring circuits shall be designed to minimise spurious operations due to load changes and other transient conditions.SR-41606 - If the UPS switches over to the bypass supply due to inverter failure, the logic shall lock out the inverter and shall not automatically transfer back to the inverter supply. No-break return to the inverter supply shall be manually initiated.SR-41607 - In case of a short circuit on the outgoing feeders, the UPS shall automatically switch to bypass mode if bypass is available. When the short circuit is cleared, the UPS shall automatically switch back to inverter mode.3.15 Main distribution board If a separate main distribution board are provided, the requirements to distribution board is found in TR3121.SR-41611 - Selection of miniature circuit breaker (MCB) / fuses shall be based on a protection and discrimination study.SR-41612 - All live parts shall be protected against accidental touch.SR-41613 - Each main distribution board with IT system earthing shall be equipped with an insulation monitoring system and a common alarm:The insulation monitoring system shall automatically identify earth fault individually on all feeders to sub-distribution boards. Each outgoing feeder from the main distribution board shall be protected by a MCB/MCCB (or fuse) with an additional alarm contact.SR-41614 - The following local alarms shall be provided as a minimum:3.16 Control, metering and protective devices SR-41617 - The UPS unit shall have a mimic diagram on the front showing operational modes and voltage/ current/ frequency. The diagram shall show the system status and incorporate symbols, operating switches and indicating lights. The major components such as bypass switches, isolating switches and circuit breakers shall be shown with indicating lights.SR-41620 - Each UPS unit shall have a separate control unit operating 100% independently of other UPS units, i.e. a parallel UPS system shall have two control units. Each control unit shall have separate settings for all relevant parameters.SR-41621 - The UPS unit shall be equipped with insulation monitoring device. Battery earth leakage monitoring shall be included.Protection should be in accordance with TR3120 chapter 4.4.7.SR-41626 - Discrimination between UPS / bypass / battery breakers and fuses in the main UPS distribution board shall be documented. Selection and coordination of protection devices shall ensure selectivity in all modes of operations.SR-41627 - Maximum rating of fuses from main distribution board to achieve protection discrimination without shutdown of the UPS shall be stated.4.1 Inspection SR-41630 - The equipment covered by this document shall be subject to inspection during fabrication, construction and testing.4.2 Type Test SR-41632 - Type test shall be performed according to IEC 62040-3 clause 6.1.5. Test certificates for tests which have been carried out on similar equipment, shall be provided on request.4.3 Shop Test SR-41634 - A test procedure shall be provided based on the following requirements.SR-41635 - The results of all tests shall be recorded on test sheets together with all rated values and equipment data.SR-41636 - Applicable shop tests shall be carried out on the completed equipment in accordance with the relevant standards and recommendations. Shop tests shall be fulfilled before factory acceptance tests.Checking of data Mechanical inspection Insulation test High voltage test Complete operation and functional test Primary injection tests on protective relays Check of relay settings Frequency shift test Check of all alarm functions Perform manual return to inverter output from bypass supply, and record results on oscillograms Simulating of inverter failure which would cause transfer of load from inverted output to bypass supply, and recording of results on oscillograms. Short Circuit Test. Simulated test for the correct functioning of the distribution protective device should be made through an impedance which represents the load loop, in additionto a direct short circuit. The output shall be recorded on an oscillogram4.4 Factory Acceptance Test (FAT) SR-41639 - The UPS system shall for each project be subject to the standard test listed in table 2. The UPS with distribution board shall be tested with a suitable battery bank.SR-41640 - These tests shall be considered to be the minimum test requirements for an UPS system. If additional tests are required, then they shall be specified in the UPS data sheet.Table 2 – Uninterruptible power supply (UPS) system test requirementsChanges in version 4: Prepared for use of IOGP specification S-701, S-702 and S-740, with supplementary requirements.Section 3.12,1: Preparation to allow Li-ion battery technology.Update of references in the whole document. Changes in version 3.02: Document updated from Statoil template to template. Wording "Statoil" changed to "". Insignificant changes, performed by system administrator, on behalf of author/owner.Changes in version 3.01: Published in new minor version as part of the GEM-project (Governing Element Management). TR-document is digitalized, and each requirement element is now identified with a unique IDChanges in version 3: There are editorial updates and clarifications in all sections.Generally, TR3120 is referred to for general requirement for electrical equipment. Section3.1: Requirement regarding air-cooling is modified. Section3.1: Requirement regarding switch facilities for AC UPS is modified. Section3.8: : Requirement regarding noise limit is modified Section 3.12.1: Requirement regarding calculating battery capacity is modified Section 3.13: Requirement regarding UPS withstand of overload is modified Section 3.13: Requirement regarding short circuit capability will be stated via datasheet. Section 4.2: Added reference to type test Section 4.4: Table 2, item 5. Short circuit test shall be in inverter mode Section 4.4: Table 2. Requirement for audible noise test is deleted.6.3 References SR-41652 - The following standards include provisions and guidelines which, through reference in this text, constitute provisions and guidelines of this document. Latest issue of the references shall be used unless otherwise agreed. Other recognized standards may be used as long as they fulfil or exceed the requirements and guidelines of the standards referenced below.Loads Within ¼ period Within 10 ms Within 100 ms 0-50 % load on/off Max ± 30 % Max ± 10 % Project specific 0-100 % load on/off Max ± 50 % Max ± 30 % Project specificItem no Standard test 1 Visual inspection and check of wiring and dimensions according to project drawings. 2 Insulation test. 3 A complete functional test. This test shall also include test of supervisory and remote signalling circuits. 4 Full load test. 5 Short circuit test in inverter mode 6 Short circuit protection device test. Test shall be performed to document the selectivity in the UPS distribution. Identical type of largest fuse and/or circuit breaker as installed in the UPS main distribution board shall be included in the test. Test shall be done with and without bypass available. 7 Earth fault test. 8 Transfer test. Measurement of UPS output voltage quality. The test shall document proper function of the UPS voltage regulation during switching between all different modes of operation. 9 Battery discharge test function shall be demonstrated. 10 Restart test. Black-start of UPS system shall be demonstrated. 11 If battery is Li-ion type, it shall be possible to test / verify the internal diagnostics and protective functions of the BMS instrumentation prior installation and during commissioning and as part of later maintenanceAC Alternating Current DC Direct Current EMC Electromagnetic Compatibility IP International Protection IT Insulated Terra LCI Life Cycle Information MCB Miniature Circuit Breaker MCCB Moulded Case Circuit Breaker RMS Root Mean Square UPS Uninterruptible Power SupplyShall (requirement) Requirement strictly to be followed in order to confirm to the document and from which no deviation is permitted, unless a deviation permit is approved. Should (recommendation) Indicates that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others, or that a certain course of action is preferred but not necessarily required, or that (in the negative form) possibility or course of action is deprecated but not prohibited. May Indicates a course of action permissible within the limits of the document. Can Statements of possibility and capability, whether material, physical or causal.