ZF SERIES HV GAS INSULATED SWITCHGEAR (GIS) tgood.com Energy. Fast.
TGOOD produces over 5000 switchgear units annually for projects around the globe PRODUCT OVERVIEW High performance alternative to air insulated systems. Best-in-class lead times measured in weeks, not months. Immune to harsh environmental conditions. Sealed GIS is safe to touch and inherently arc-resistant. Compact factory-pressurized modules save space and reduce cost compared to traditional GIS. May be pre-assembled within a prefabricated E-House or mobile trailer-mounted substation. 2 ZF Series HV Gas Insulated Switchgear (GIS) www.tgood.com
KEY BENEFITS PROVEN APPLICATIONS Compact design ideal for spaceconstrained projects in crowded cities and congested industrial zones. Outstanding performance in harsh environments, including high altitude, heavily polluted, coastal, desert and arctic sites. Low audible noise and electric field emissions make this product attractive for densely populated areas. MODULAR DESIGN Standard configurable modules allow reduced lead times for any customer arrangement. Fully assembled, pressurized and tested in the factory. Modules can be energized within 24 hours of delivery. Significant cost savings over traditional GIS solutions. SAFE, RELIABLE, AND LOW-MAINTENANCE Grounded tank design is safe to touch, no exposed voltage. Completely arc-resistant. Modules connected with gas-tight flanges, delivering decades of reliable operation. ZF Series HV Gas Insulated Switchgear (GIS) 3
PRODUCT DESIGN Modules individually configured and tested within an ISO 9001 factory environment. Corrosion-free aluminum housings ensure safe encapsulation of factory-filled SF6 gas. Simple gas filling requires top-up with SF6 bottles only; no complex gas processing equipment required. Compact modules require no special shipping considerations. 1 2 CIRCUIT BREAKER The ZF Series circuit breaker module is comprised of two interconnected structures: the stored-energy spring mechanism and the current interrupting unit. 1. Circuit Breaker Module: Integral Components 2. Spring Operating Mechanism Assembly 4 www.tgood.com
CURRENT INTERRUPTING UNIT 1 2 3 4 5 6 7 8 9 10 Two separate current-carrying contact paths for each current interrupting unit; main contacts disconnect first and connect last to minimize arcing damage. During a short circuit, arc-generated thermal pressure assists the spring operating mechanism to quickly pull contacts apart. Arc-quenching design provides exceptional durability by minimizing mechanical stresses on circuit breaker components. 1. Arcing Contact (Fixed) 2. Main Contact (Fixed) 3. Nozzle 4. Arcing Contact (Moving) 5. Main Contact (Moving) 6. Contact Cylinder 7. Thermal Expansion Chamber 8. One-Way Valve 9. Pressure Relief Valve 10. Pressure Relief Spring STORED-ENERGY SPRING MECHANISM Provides force to efficiently and reliably open and close the circuit breaker. Compact layout allows for straightforward viewing of spring mechanism position. Spring Operating Mechanism Sealed bearings and maintenance-free charging mechanism deliver decades of problem-free operation. www.tgood.com ZF Series HV Gas Insulated Switchgear (GIS) 5
Current Transformer Structure Three Position Switch SF6 Outdoor Bushings THREE POSITION SWITCH Single three-position switching module incorporates both isolation and earthing functions. Position indicators allow visual inspection of switch position. SEALED THREE PHASE BUS Sealed connection modules available in a variety of configurations to enable GIS arrangements according to any customer requirement. Bellows-type expansion joints between modules mitigate the effect of temperature-related changes and allow for practical site assembly tolerances. CURRENT AND POTENTIAL TRANSFORMERS Current transformers and potential transformers provide key measurement and system protection functions. Three-phase CT and PT modules can be positioned at any point within the GIS system. Wide range of protection and metering classes available. HIGH-SPEED EARTHING SWITCH Maintenance-free electric motorspring mechanism delivers fast and reliable operation. Arc-resistant contacts enable use in transmission line grounding applications. LIGHTNING SURGE ARRESTORS Provides protection from excessive voltages that may occur in case of a lightning strike or switching transient. Online monitoring and surge-count with the use of integrated current sensors. SF6 OUTDOOR BUSHINGS Suitable for outdoor termination to overhead lines and transformer bushings. CABLE TERMINAL UNITS Allows for the connection of typical highvoltage cable types to the GIS system. LOCAL CONTROL CABINET Provides central control and monitoring of the GIS system, including operation control, signal collection, relay protection, and SF6 monitoring. 6 ZF Series HV Gas Insulated Switchgear (GIS)
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PRODUCT SPECIFICATIONS Item Unit Specification Rated Voltage kv 72.5 126 145 Rated Current (breaker/bus) Withstand Voltage (phase-to-ground/phase-to-phase) Lightning Impulse Voltage (phase-to-ground/phase-to-phase) A 3150/4000 kv (1 min) 160/200 230/300 275/315 kv Peak 1.2/50μs 350/410 550/650 650/750 Short-time Withstand Current ka (4s) 40 Peak Withstand Current (50Hz/60Hz) ka 100/104 SF6 Pressure at 20 C (filling pressure/minimum pressure) mpa 0.5/0.4 0.6/0.5 0.6/0.5 SF6 Leakage %/year 0.3 Rated Operating Sequence o-0.3s-co-180s-co Corona Extinction % 110 Partial Discharge (interval) pc 5 Lifetime Ratings Breaker (mechanical) open/close > 10,000 Breaker (electrical) short circuit trip > 22 Three Position Switch open/close > 5,000 Quick Action Earthing Switch open/close > 5,000 ENVIRONMENTAL SPECIFICATIONS Item Units Specification Operating Environment Indoor/Outdoor Ambient Temperature C -30 to +40 Altitude metres above sea level 1,000 (for rated bushing voltage) Relative Humidity Seismic Intensity 90% Monthly Average, 95% Daily Average Horizontal Acceleration: 0.4g; Vertical Acceleration: 0.2g Wind Velocity m/s 35 (Wind pressure: 700 Pa) Ice Loading mm 10 8 ZF Series HV Gas Insulated Switchgear (GIS)
145kV Compact GIS Substation
Feeder 2 C B A Feeder 1 C B A Bus Tie Transformer 2 A B C Transformer 1 A B C B Typical Transformer Branch Connection A ES BUS CT GCB CT 3250 5600 10 ZF Series HV Gas Insulated Switchgear (GIS)
SINGLE BUS LAYOUT Bus tie design facilitates system upgrades and allows the Substation to continue operation while expansions takes place. Flanged connections on the GIS modules allows for the safe and straight-forward addition of additional modular components as required. B 15000 B C A C A 6750 LCC LCC LCC LCC LCC LCC LCC A C A C B 15000 B LEGEND BUS: Main Busbar CT: Current Transformer ES: Earthing Switch FES: Fast Earthing Switch GCB: Gas Insulated Circuit Breaker LCC: Local Control Cabinet : Three Position Switch All Units in Millimetres www.tgood.com ZF Series HV Gas Insulated Switchgear (GIS) 11
DOUBLE BUS LAYOUT Critical load centers and power generation facilities commonly use a double bus GIS configuration. The two busbars can be operated separately or tied together. Double bus configurations can reduce the short circuit current, extend the standard maintenance period, and enhance power supply reliability. Bus 2 Bus 1 Bus Tie Feeder 1 Feeder 2 Transformer 1 Transformer 2 Typical Feeder Branch Connection FES GCB CT CTU LCC 2000 6630 12 ZF Series HV Gas Insulated Switchgear (GIS)
LCC LCC LCC LCC LCC LCC LCC ES ES 6750 7200 LEGEND BUS: Main Busbar CTU: Cable Terminal Unit CT: Current Transformer ES: Earthing Switch FES: Fast Earthing Switch GCB: Gas Insulated Circuit Breaker LCC: Local Control Cabinet : Three Position Switch All Units in Millimetres www.tgood.com ZF Series HV Gas Insulated Switchgear (GIS) 13
BUS TIE LAYOUT Bus ties are commonly utilized in congested industrial and residential areas. Two high voltage incoming lines with two step-down transformers ensure a highly flexible and reliable power supply. Feeder 1 A B C Feeder 2 A B C Transformer 1 Bus Tie Transformer 2 A B C A B C Typical Bus Tie Branch Connection ES FES GCB CT BUS CT 2220 7550 14 ZF Series HV Gas Insulated Switchgear (GIS)
LCC LCC LCC LCC LCC ES ES 10550 10400 LEGEND BUS: Main Busbar CT: Current Transformer ES: Earthing Switch FES: Fast Earthing Switch GCB: Gas Insulated Circuit Breaker LCC: Local Control Cabinet : Three Position Switch All Units in Millimetres www.tgood.com ZF Series HV Gas Insulated Switchgear (GIS) 15
BR-ZF-En-NA-1503 www.tgood.com TGOOD #3-1101 Main Street Penticton, British Columbia V2A 5E6 Canada Tel: +1 778 476 5833 Fax: +1 250 412 5681 sales@tgood.com