Project Type: High Voltage Greenfield Substation Project
Location: Industrial Zone, Turkmenistan
Client: Turkmenistan National Grid Company
Project Phase: Technical Proposal for Tender
Tender Reference: LOT-220-11kV-2024
Scope: Complete equipment package compliant with IEC and equivalent GOST standards, designed for harsh Central Asian climate and high pollution environments.
We, TSTYNICE, commit to supplying a complete equipment package (Items 1-6) that fully meets all technical requirements of the inquiry. All equipment will comply with IEC Standards and be accompanied by a comprehensive IEC ↔ GOST Compliance Matrix for each item, ensuring smooth approval, installation, and long-term operation in Turkmenistan.
Model: TST-SFSZ11-63000/220
Core Technical Features:
Designed for -35°C to +45°C operation with special low-temperature oil and steel grades.
Seismic design verified for 7 MSK-64 (equivalent to IEEE 693 High Level).
Corrosion protection per ISO 12944 C5-M for high pollution (Class III) and humidity.
Three-Winding Design: High Voltage 220kV (Star), two Medium Voltage 11kV windings (Delta) with vector group Y/Δ-11-11-11.
Advanced Core: Step-lap, laser-scribed, high-permeability silicon steel core ensuring no-load loss ≤ 43 kW (below 45 kW requirement) and load loss ≤ 240 kW (below 250 kW requirement).
Cooling & Noise: ONAN/ONAF (42/63 MVA) with low-noise fans and anti-vibration design, guaranteeing sound power level ≤ 62 dBA at 1m.
Bushings & Insulation: Composite (silicone rubber) bushings per IEC 60137. Insulation level: HV - LI 1050kV / AC 460kV; MV - LI 275kV / AC 105kV (exceeds specified values).
Monitoring & Protection: Includes Buchholz relay, pressure relief device, winding/oil temperature gauges with contacts, and integrated online DGA monitor with RS485/IEC 61850-8-1 interface.
Environmental Adaptability:
Model (ICB): TST-ICB-220-O (For Circuit Breaker, Qty: 2)
Model (IDS): TST-ICB-220-D (For Disconnect Switch, Qty: 2)
Core Technical Features:
Unified Platform: Both cabinets based on same hardware platform for spares commonality. IP54 stainless steel enclosures.
Protection & Control IED: TST-PC300 series IED compliant with IEC 60255 and IEC 61850 Ed.2. Pre-configured with required protection functions (50/51, 50N/51N, 59/27, 81, 79, 50BF).
Current Transformers: Supplied with 0.2S metering and 5P20 protection class CTs (300/5A), burden ≥20 VA. Include test switches.
Interlocking & Control: For Item 3, includes motor drive controller, mechanical/electrical interlocks with earthing switch, and clear position indication (LED and mechanical).
Communication: Dual Ethernet ports for IEC 61850 MMS/GOOSE and Modbus TCP. Supports client's SCADA integration.
Auxiliary Supply: Inputs for DC 220V and AC 230V with automatic switchover.
Model: TST-ONS-10/0.4-STD (Item 4, Qty: 2)
Model: TST-ONS-10/0.4-HR (Item 5, Qty: 2, with 31.5kA withstand)
Core Technical Features:
Integrated Design: Houses dry-type transformer (10/0.4 kV, ~100 kVA), LV distribution, protection, and Automatic Transfer Switch (ATS) in one IP54 enclosure.
Protection IED: TST-PC100 IED with functions: 50/51, 50N/51N, 27/59, 81, and logic for ATS between redundant sources.
Component Compliance: All internal components (NR‑3U, KAT‑12, SR‑90 equivalents) are IEC-compliant with provided GOST cross-certification.
High Withstand Version (Item 5): Reinforced busbar structure and component selection to guarantee short-circuit withstand ≥ 31.5 kA for 1 second. Dedicated mounting plate as specified.
CTs: Include 300/5A, 0.5 class metering and 5P20 protection CTs.
Model: TST-COMM-KIT (Qty: 2)
Core Technical Features:
Secondary injection test set for relay/IED testing.
CT & PT ratio/polarity test kit.
Programmable fault/signal simulator for scheme verification.
Insulation resistance and continuity testers.
Portable Test System: Integrated in IP41 wheeled cabinet. Contains:
Documentation & Adapters: Includes全套 cables, plugs, adaptors for all cabinet types in this project, and detailed commissioning procedure manuals in Russian/English.
Standards Compliance: All equipment designed and tested per referenced IEC standards (IEC 60076, 62271, 60255, 60137, 60529, 61439). Corrosion protection per ISO 12944 & ISO 1461.
GOST Compliance Matrix: A detailed line-by-line matrix will be provided, mapping each IEC clause/requirement to the equivalent GOST standard (GOST 1516.1, GOST 3484.1, GOST R 52725, etc.), ensuring regulatory acceptance.
Documentation Package: Includes GA drawings, wiring diagrams, datasheets, factory test reports (FAT protocols), proposed SAT protocols, spare parts list for 10 years, and operation/maintenance manuals in Russian and English.
Testing: All routine and type tests will be performed as per IEC standards. Witnessed Factory Acceptance Tests (FAT) are offered and recommended. Specific tests for seismic, temperature, and pollution will be conducted.
Warranty: 36 months from the date of commissioning or 42 months from shipment, whichever occurs first, covering all materials and workmanship.
Dual-Standard Expertise: Proven experience supplying to CIS markets with full IEC/GOST compliance documentation.
Climate-Tailored Design: All equipment specifically engineered for the defined temperature range, seismic zone, and Pollution Class III environment.
Integrated System Approach: Cabinets feature our own IEDs with native IEC 61850 support, ensuring seamless interoperability within the package and with the client's control system.
Local Support: Willingness to provide on-site supervision, commissioning assistance, and technician training.
