Electrical Product Portfolio
Integrated primary equipment (switchgear, panels) + secondary equipment (automation, protection, control). All products engineered for harsh environments with international IEC/GB standards compliance.
TCH-HV-RMU 12
Ring main unit for 10kV distribution networks. Compact, maintenance-free vacuum load switch + fuse combination. Ideal for transformer feeder line, ring network, and terminal station applications.
Standards Compliance
- GB 3906-91 (3-35kV AC Metal-clad Switchgear)
- IEC 298 (AC Metal-clad Switchgear and Control)
- GB/T 11022 common specifications for HV switchgear
Key Components
- FZN21-12 vacuum load switch (12kV, 630A)
- FZRN21-12 vacuum load switch + fuse combination
- RN2-10 high-voltage current-limiting fuse
- JDZ-10 voltage transformer for metering/protection
- HYSWS composite metal-oxide surge arrester
- GSN-10 live-line voltage indicator
- LZZB6-10 / LZZX-10 current transformer
Dielectrical Strength
- 1-min power-frequency withstand: 42 kV (phase-to-phase, to-ground, across vacuum gap)
- Lightning impulse withstand: 75 kV
- Isolating gap: 48 kV power frequency / 85 kV impulse
Operating Conditions
- Ambient temperature: -25°C to +40°C
- Altitude: ≤1000 m
- Relative humidity: daily avg ≤90% (+25°C)
- Free from corrosive or flammable gases, water vapor, dust
Protection Degree
- Cabinet enclosure: IP2X (complies with "Five-Prevention" interlock requirements)
- Mechanical interlock between internal switch and partition
Typical Applications
- Small/medium factories and substations (10kV)
- Residential complexes, high-rise buildings
- Schools, parks, ring-network power supply and terminal distribution
TCH-HV-MV 12
Three-phase 50Hz indoor metal-clad withdrawable switchgear for 3.6–12kV power systems. Compatible with ABB VD4 and VS1 vacuum circuit breakers. Used in power plants, substations, and industrial distribution.
Standards Compliance
- IEC 298, GB 3906, DL/T 404
- Five-Prevention interlock system: prevents load-switch, misclose, mis-open, mis-entry to live compartment, and mis-grounding
Circuit Breaker Compatibility
- VD4 (ABB type) vacuum circuit breaker
- VS1 (domestic type) vacuum circuit breaker
- Rated breaker current: 630A / 1250A / 2000A / 3150A
Detailed Circuit Breaker Specs
| Parameter | Value |
|---|---|
| Rated voltage | 3.6 / 7.2 / 12 kV |
| 1-min power frequency withstand | 24 / 32 / 42 kV |
| Lightning impulse withstand | 40 / 60 / 75 kV |
| Rated current | 630 / 1250 / 1600 / 2000 / 2500 / 3150 A |
| Symmetrical short-circuit breaking | 16 / 20 / 25 / 31.5 / 40 kA |
| 4s short-time withstand | 16 / 20 / 25 / 31.5 / 40 kA |
| Peak withstand | 40 / 50 / 63 / 80 / 100 kA |
| Mechanical life | 20,000 operations |
| Operating sequence | O - 0.3s - CO - 180s - CO |
| Closing time (rated voltage) | ≤50 ms |
| Average opening speed | 0.9 - 1.2 m/s |
| Average closing speed | 0.6 - 0.8 m/s |
Busbar Configuration
- Single busbar or single busbar with sectionalizer
- Self-bus or external-bus option
Typical Applications
- Power plants, substations (3.6-12kV secondary distribution)
- Industrial enterprises receiving/transforming power
- Large motor starting and control
TCH-LV-DG
Modular withdrawable LV switchgear for 380V / 660V power distribution in power plants, substations, and industrial facilities. Compatible with DW17, DWX15C, DZ20 breakers and QSA knife switches.
Standards Compliance
- IEC 60439-1, GB 7251.1-1997, JB/T 9661-1999
Cabinet Configuration
- JX (Incoming Line Cabinet) / ML (Bus Coupler) / KD (Feeder Cabinet)
- Horizontal busbar chamber (top), vertical busbar chamber (rear)
- Functional unit chambers (draw-out type), cable chamber (right)
- Compartments isolated; prevents fault propagation
Detailed Parameters
| Parameter | Value | |||
|---|---|---|---|---|
| Horizontal busbar rated current | 2500 A / 3150 A | |||
| Vertical busbar rated current | 630 / 800 / 1000 A | |||
| Main circuit plug-in contact rated current | 200 / 400 A | |||
| Auxiliary circuit rated current | 16 A | |||
| Feeder circuit rated current | ≤1600 A | |||
| Receiving circuit rated current | 1000 / 1600 / 2000 / 2500 / 3150 A | |||
| Rated short-time withstand (1s) | 15 / 30 / 50 kA | |||
| Rated peak withstand | 30 / 63 / 105 kA | |||
| Electric motor control power | 0.45 - 155 kW (special order up to 155kW) | |||
| Dielectric strength | 2500 V / 1 min | |||
| Protection degree | IP40 | |||
| Mechanical life (draw-out unit) | 100 cycles |
| I/O Type | Unit (LCU1-N) | Common (LCU) |
|---|---|---|
| DI (Digital Input) | 96 | 96 |
| SOE (Sequence of Events) | 32 | 32 |
| AI (Analog Input) | 16 | 32 |
| DO (Digital Output) | 64 | 64 |
PLC Platform
- Mitsubishi FX series (LCU1-LCUN type)
- Communication via RS232/RS485 to color touchscreen + group PLC
- Touch screen for parameter setting and data input
Microcomputer Speed Measurement
- Input: PT signal 0-100V, frequency 0-75Hz
- Power: DC110V / AC220V
- Output: ≥6 channels (via RS-485)
Temperature Intelligent Detection
- Per LCU equipped with 1 device
- CU50 / PT100 temperature sensors
- ≥16 measurement points
- Multi-channel temperature overrun alarm
- RS-485 communication to management computer
Automatic Synchronization
- Per plant substation equipped with multi-point automatic synchronization device
- Complete N+1 generator automatic synchronization parallel operation
- 110kV (or 35kV) line automatic synchronization
- Manual synchronization operation backup
- Generator online voltage transformer (or rotating transformer)
- Automatic speed/voltage matching to system standard
Power Supply
- Upper machine: 1-2 sets 1kVA AC/DC dual-input switching regulated power supply
- GPS clock synchronization (24h error ≤0.001s)
- Communication management machine + remote SCADA support
Operator Workstation
- Monitoring center control room: 1 set operator workstation
- Piano-type configuration, can place 4 operators
- 2 mainframes + 3 monitors, 1 dot matrix printer, 1 voice alarm
Cabinet Configuration
- System cabinet dimensions: 2200 × 800 × 600 mm
- Protection degree: IP42
- Equipped with temperature controller, heater, relay, buttons
Five-Prevention Interlock
- Prevents: load switch operation with switch in closed position
- Misclosure on grounds, opening under load, entering live compartment
- Ensures grounding when protection triggered
TCH-EXC Series
Industry-leading full-digital PLC-based excitation control for synchronous generators. Dual-channel hot standby. Used in hydropower, thermal power, metallurgy, chemical, oil & gas applications worldwide.
System Architecture
- Thyristor integrated power electronics module
- PLC + touch-screen control
- Chinese-language touch interface + dynamic graphical display
Five Core Capabilities (智能化)
- Intelligent detection
- Intelligent display
- Intelligent control
- Intelligent transmission
- Intelligent testing
Advantages
- Full digital control, modular structure, series combination
- Domestic leading technology level
- Powerful human-machine interaction
- Hard switch + simple structure, rich software functionality
Industry Applications
- Hydropower stations
- Thermal power plants
- Metallurgy, chemical, petroleum, mining industries
- Member: China Electrical Industry Association Power Generation Equipment Branch
Track Record
- Hundreds of excitation systems in industrial operation
- Longest service time exceeds 8 years
- Zero recorded incidents of lost magnetism, overvoltage, or失控 failure
- Sets new safety operation record for intelligent excitation systems
TCH-PSU Series
Modular N+1 redundant DC power system for substations, power plants, and industrial DC loads. Self-cooling or forced-air modules from 800W to 6kW. Hot-swap parallel up to 16 modules. Battery management built-in.
Module Families
- Z22005 / Z22010 (Self-cooling): 800W - 3kW, density 189 mW/cm³
- E22005 / E22010 (Forced-air): 800W - 3kW, density 360 mW/cm³
- E22020 (Forced-air, higher power): up to 6 kW, density 378 mW/cm³
Output Specifications
- 220V / 5A, 220V / 10A
- 110V / 10A, 110V / 20A
- 48V modules available (99-143 Vdc range)
- Adjustable output range: 198-286Vdc (220V modules)
- 43-63Vdc (48V modules)
Technical Performance
- Power factor: ≥0.95
- Efficiency: ≥92%
- Input voltage: 300-456 Vac three-phase
- Operating temperature: 0-45°C at full rated power
Protection Features
- Soft-switch technology (no buffer network needed)
- PFC circuit for input harmonic suppression (minimum EMI)
- 2-stage EMC circuit for grid compatibility
- Independent forced-air cooling (E series)
- Self-cooling (Z series) with over-temperature alarm + derating
- Hot-plug design for maintenance convenience
- Built-in battery charging curve management (S-type modules)
Monitoring & Control
- Built-in MCU for self-monitoring + management
- RS485 digital communication with central monitor
- 4-quadrant LED display
- Output current range: 10%-100% adjustable
System Configuration
- Z series: 3 modules per 19" rack
- E series: 3 modules per 19" rack (forced-air)
- N+1 redundancy configuration
- Automatic current equalization across paralleled modules
Certifications
- AL (Product Quality Inspection)
- MA (Mining Safety, applicable to mining applications)
- NO.L0685
Applications
- N+1 redundant DC power configuration
- DC backup power for substations
- Distributed power supply systems
- Power plant DC emergency power
- Industrial automation DC supplies
TCH-PTQ 2
High-precision automatic / manual-approval paralleling device for synchronous generators and line transformers. Voltage, frequency, phase, acceleration, slip-rate measurement via soft/hardware combination. Failsafe with no-voltage close interlock.
Core Capabilities
- Soft/hardware-combined measurement of voltage, frequency, phase, acceleration, slip rate
- Fuzzy-control variable-parameter voltage & frequency regulation
- Two voltage regulation modes: pulse-width (servo-motor analog) or count-based (digital)
- Frequency regulation supports hydraulic, DC servo, and AC motor speed governors
Operating Modes
- Auto Close: Fully automatic regulation + close command at predicted phase angle
- Manual Approval: Operator must hold external Approval button to permit close command
- No-Voltage Close: Permitted only when external grid confirmed de-energized
Multi-Setting Parameter Table
| Parameter | Function | Range | Default |
|---|---|---|---|
| P00 | Input voltage select (400V/100V) | U400/U100 | U100 |
| P01 | Line/Generator mode | nnnn/FFFF | FFFF (Gen) |
| P02 | Close mode | HEAU/HE-- | HEAU (Auto) |
| P03 | No-voltage close | HUYY/HunO | HunO (No) |
| P04 | Voltage regulation mode | UPPP/UCCC | UPPP (PWM) |
| P05 | Lead time | 0.1 - 2.5 s | 0.3 s |
| P06 | Allowable voltage diff | 2% - 10% (line: 2-18%) | 4% |
| P07 | Allowable frequency diff | ±0.05 - ±0.6 Hz | 0.3 Hz |
| P08 | Allowable power-angle (line mode) | 10° - 60° | 30° |
| P09 | PWM voltage pulse width | 0.1 - 0.8 s | 0.3 s |
| P10 | Count-based voltage steps | 2 - 10 | 4 |
| P11 | Speed pulse width | 0.2 - 2.5 s | 0.4 s |
| P12 | Speed interval | 3.0 - 25 s | 10 s |
| P13 | Close width | 0.3 - 1 s | 0.5 s |
| P14 | Overvoltage set (% of rated) | 110 - 130% | 120% |
| P15-P16 | Calibration (factory only) | - | - |
Fault Detection (6 Types)
- Grid dropout (voltage/frequency = 0, 76s fault hold)
- Generator dropout (continuous fault hold)
- Grid frequency deviation > 3 Hz
- Generator frequency deviation > 5 Hz (except start-up)
- Grid voltage abnormality (over/under voltage, fault relay action)
- Generator overvoltage (fault relay action)
Physical Specifications
- Chassis: 75 × 150 × 260 mm (H × W × D)
- Cutout: 75 × 150 mm
- Front panel: 80 × 160 mm
- Working environment: -10°C to +50°C, altitude ≤2500m
Output Signals (6 Relay Contacts)
- Speed-up (power-angle match)
- Speed-down (same-frequency)
- Voltage-up (under-voltage)
- Voltage-down (over-voltage)
- Synchronous close
- Fault
TCH-RMU 2000
Wireless remote monitoring for unattended substations. 8-channel universal I/O, MODBUS protocol, SMS alarm. Ideal for rural African grid nodes lacking reliable wired communications.
Application Scenarios
- Unattended substations in remote areas
- Distributed generation nodes
- Micro-grid power stations
- Pumping stations, isolated industrial loads
Key Features
- 8-channel universal I/O (configurable DI/DO/AI)
- MODBUS RTU / TCP protocol support
- SMS alarm push to multiple recipients
- GPRS / 3G wireless uplink
- Local storage for offline data buffering
TCH-RPC 12
Thyristor-switched reactive power compensator for power factor correction in substations and industrial loads. Half-cycle response <10ms. Zero inrush current. Ideal for unstable grids with rapid load changes.
Technical Highlights
- Thyristor zero-cross switching (no contactor wear)
- Half-cycle response: <10 ms
- Zero inrush current on capacitor bank switching
- Suitable for dynamic loads (welding, elevators, rolling mills)
Typical Applications
- Hydropower station auxiliary loads
- Substation capacitor banks
- Industrial plants with fluctuating reactive demand
TCH-GCS Series
DSP-core integrated control + protection for diesel/gas generator sets. Six-fold protection (over/under voltage, overload, short circuit, overspeed, underspeed) with inverse-time characteristics.
Six Protection Functions
- Overvoltage protection
- Undervoltage protection
- Overload protection (inverse-time)
- Short-circuit protection
- Overspeed protection
- Underspeed protection
Use Cases
- Standby diesel generator sets for hydropower stations
- Hybrid solar-diesel microgrid backup
- Remote area power supply
Valves & Hydraulic Control Systems
Complementary mechanical & hydraulic control equipment for hydro turbine inlet, penstock isolation, and discharge regulation. Integrated as part of TC HYDRO turnkey EPC scope, sized to match the turbine generator unit capacity (60 kW – 28 MW).
Hydraulic Control Slow-Closing Butterfly Valve
Heavy-duty hydraulic butterfly valve for hydro turbine inlet, pump station discharge, and reservoir outlet pipelines. Two-stage slow closing eliminates water hammer; deadweight or accumulator energy storage enables fail-safe closure during power loss — critical for unattended hydro plant operation.
Hydraulic Control Slow-Closing Ball Valve
High-pressure ball valve for high-head hydro turbine inlets, long-distance penstock isolation, and pump station main shut-off. Spherical sealing element provides tight shut-off at high differential pressure with low torque; hydraulic actuator with accumulator ensures emergency closure within milliseconds.
Electric Gate Valve
Full-bore electric gate valve for water conveyance pipelines, forebay isolation, and penstock drain lines. Bi-directional zero-leakage sealing, low flow resistance, and electric actuator with manual override. Ideal as main shut-off valve in small and medium hydro schemes.
Cone (Energy Dissipation) Valve
Fixed cone valve for hydro turbine bypass free discharge, continuous flow control, and bottom-outlet energy dissipation. Inverted cone plunger with 4–8 guide vanes eliminates cavitation and vibration; flow coefficient up to 0.83, superior to other valve types. Electric or hydraulic actuator options.
Dual-Seal Butterfly Valve (Working + Maintenance)
Hydropower-station-grade butterfly valve with both a downstream working seal (rubber) and an upstream maintenance seal (metal hard seal). Triple compensation — elastic, displacement, and pressure — guarantees zero leakage even under long-term operation. Allows in-situ seal inspection without draining the penstock.
Hydraulic Power Unit & Electric Control Cabinet
Compact hydraulic power unit with nitrogen-charged accumulators, integrated valve block, and PLC smart control cabinet. Stores enough energy for at least one full valve closure during power loss — enables 'black start' capability. Supports manual / automatic / remote control modes with valve-position feedback.
Power Transformers & Distribution Solutions
Complete transformer portfolio from distribution-class to grid-scale power transformers — engineered for African grid conditions including high-temperature operation, voltage fluctuation tolerance, and harsh environments. Integrated with TC HYDRO turnkey EPC scope for hydropower plants, substations, and microgrid systems.
Oil-Immersed Power Transformer (10/35 kV)
Distribution and power transformer for hydropower plant step-up/down, substation, and industrial applications. Hermetically sealed tank with conservator, radiator fin cooling, and on-load tap changer (OLTC) for automatic voltage regulation under load — ensuring stable output across fluctuating grid conditions.
110 kV Power Transformer (Grid-Tie)
High-voltage grid-tie transformer for regional substations, power plant step-up, and transmission interconnection. Three-winding design enables simultaneous HV/MV/LV output. ±8×1.25% OLTC ensures voltage stability across wide load variations — critical for African grids with fluctuating demand patterns.
Amorphous Alloy Distribution Transformer
Energy-saving distribution transformer with amorphous alloy core — reduces no-load loss by 70–80% compared to conventional silicon steel cores. Ideal for rural electrification and microgrid applications where transformers operate at low load factors. Complies with national energy efficiency standards for green grid infrastructure.
Cast Resin Dry-Type Transformer
Epoxy cast resin dry-type transformer for indoor installations requiring fire safety, environmental protection, and maintenance-free operation. No oil means zero fire risk and no leakage — ideal for underground substations, buildings, and hydro plant control rooms. Class F/H insulation withstands continuous high-temperature operation.
Pole-Mounted Distribution Transformer
Compact single-phase pole-mounted transformer for rural electrification, village power distribution, and remote hydropower community grids. Corrosion-resistant enclosure designed for tropical climates. Direct pole mounting eliminates substation construction — fast deployment for off-grid African communities.
American Pad-Mounted Box Substation
Compact pre-assembled substation integrating HV switch, transformer, and LV distribution in a single pad-mounted enclosure. Ideal for residential distribution, solar-diesel hybrid systems, and rural electrification. Tamper-proof design with lockable compartments — safe for unattended public-area installations.
European Compact Box Substation
British-style compact box substation with factory-pre-installed SF6 ring main unit. Modular 3-bay design allows flexible cable routing and easy expansion. Corrosion-resistant steel enclosure rated for tropical coastal environments. Ideal for urban distribution networks and industrial park power supply.
Turbine Control & Retrofit Systems
Mechanical-hydraulic control and modernization for existing hydropower units. Convert fixed-blade runners to adjustable pitch, eliminate oil-leakage risk, and boost efficiency by 5–15%. Backed by 100+ retrofit references across China and Southeast Asia.
TCH-OFBP Series
Oil-Free Blade Pitch Control SystemZero-leakage blade pitch control for Kaplan and bulb turbines. Replaces the traditional oil-operated pitch system with a top-mounted integrated electro-hydraulic actuator + mechanical push-pull rod. Eliminates oil contamination, reduces maintenance 80%.
TCH-BPC 2000
Digital Blade Pitch ControllerPLC-based digital controller with 7" touchscreen HMI. Stores 5+ cam-relationship curves, real-time blade angle feedback, Modbus RTU and optional 5G remote diagnostics. Designed for unattended or minimally-staffed power stations.
TCH-RETROFIT-FP
Fixed-to-Pitch Conversion KitComplete mechanical, electrical, and control package to convert fixed-blade Kaplan units into adjustable-pitch runners. Boosts annual energy yield 5–15%. Standard 30-day on-site installation during scheduled overhaul.
TCH-HPG Series
High-Pressure Guide Vane GovernorNo HV air system required. Closed-loop hydraulic servo with up to 16 MPa operating pressure. Ideal companion to TCH-OFBP for full turbine control modernization. Cuts governor energy consumption by 60%.
TCH-SLG Series
Conductive Slip Ring AssemblyReplaces oil-path signal transmission between the rotating shaft and the stationary control system. Maintenance-free, IP65 sealed, 20+ year service life. Pairs seamlessly with TCH-OFBP for full digital control.
Retrofit Reference Projects (Selected)
A sample of completed and ongoing TCH-OFBP and TCH-RETROFIT-FP deployments. Full case studies available on request.
15 MW · Single-unit Kaplan retrofit
11 MW × 4 units · State-power-group OFBP deployment
6 stations · Jiaokou / Botang / Silong / Banshanwei
2 stations · Fujian Gaohua, Hubei Jiefangshan
Application Matrix — Which Product Where?
| Product | Hydropower Plant | Substation | Microgrid | Industrial |
|---|---|---|---|---|
| TCH-HV-RMU 12 | — | ✓ | ✓ | ✓ |
| TCH-HV-MV 12 | ✓ | ✓ | ✓ | ✓ |
| TCH-LV-DG | ✓ | ✓ | ✓ | ✓ |
| TCH-SCADA 3000 | ✓ | ✓ | — | — |
| TCH-EXC Series | ✓ | — | — | ✓ |
| TCH-PSU Series | ✓ | ✓ | ✓ | ✓ |
| TCH-PTQ 2 | ✓ | ✓ | — | — |
| TCH-RMU 2000 | ✓ | ✓ | ✓ | ✓ |
| TCH-RPC 12 | ✓ | ✓ | ✓ | ✓ |
| TCH-GCS Series | ✓ | — | ✓ | ✓ |
| TCH-VB Series (Butterfly) | ✓ | — | — | ✓ |
| TCH-VS Series (Ball) | ✓ | — | — | ✓ |
| TCH-VG Series (Gate) | ✓ | — | — | ✓ |
| TCH-VC Series (Cone) | ✓ | — | — | ✓ |
| TCH-VMS Series (Dual-Seal Butterfly) | ✓ | — | — | ✓ |
| TCH-VH Series (Hydraulic Power Unit) | ✓ | — | — | ✓ |
| TCH-PT-OIL (Oil-Immersed Transformer) | ✓ | ✓ | ✓ | ✓ |
| TCH-PT-110 (110kV Grid-Tie) | ✓ | ✓ | — | — |
| TCH-PT-AMO (Amorphous Transformer) | ✓ | — | ✓ | — |
| TCH-DT (Dry-Type Transformer) | ✓ | ✓ | ✓ | ✓ |
| TCH-PDT (Pole-Mounted) | ✓ | — | ✓ | — |
| TCH-BS-AM (American Box Sub) | — | ✓ | ✓ | ✓ |
| TCH-BS-EU (European Box Sub) | — | ✓ | — | ✓ |
| TCH-OFBP (Oil-Free Blade Pitch) | ✓ | — | — | ✓ |
| TCH-BPC 2000 (Pitch Controller) | ✓ | — | ✓ | ✓ |
| TCH-RETROFIT-FP (Fixed-to-Pitch) | ✓ | — | — | — |
| TCH-HPG (High-Pressure Governor) | ✓ | — | ✓ | — |
| TCH-SLG (Slip Ring Assembly) | ✓ | — | ✓ | ✓ |
TC Manufacturing Capability — In-House Assembly & Quality Control
All electrical products are assembled, tested, and quality-controlled at TC HYDRO's Zhangjiajie plant — 30,000 m² site with 14,000 m² production floor. Each unit passes pre-shipment inspection (mechanical, electrical, dielectric, continuity) before export crating.
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