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MV switchgear handles voltages ranging from 3 kV to 36 kV.
Common types include:
Gas-insulated switchgear
Metal-clad switchgear
Metal-enclosed switchgear
Pad-mounted switchgear
Vault switchgear.
Purpose:
Load Interrupter Switches are cost-effective alternatives to metal-clad switchgear with draw-out circuit breakers.
They are typically used for primary side protection of medium-voltage transformers.
Features:
Available in fused or non-fused versions.
Designed for 3-phase systems with voltages up to 27 kV and continuous current up to 630A.
Offer resettable overcurrent protection in a sealed, dead-front design.
Suitable for load break and fault interrupting applications.
Application Flexibility:
Load Interrupter Switches support various configurations, including single-frame and multi-frame designs.
Options include potheads, roof bushings, terminators, lightning arresters, meters, and relays.
Design and Components:
ReliaGear SB switchboards feature a safer design with groundbreaking components:
SACE Emax 2 power circuit breakers: These ensure energy efficiency and reliability.
Tmax XT plug-in MCCBs: These save time, labor, and cost.
Available up to 6,000 A and 600 VAC.
Plug-in group mounted distribution sections allow flexibility in device installation.
Fast Shipping Options:
Choose between 2-week or 10-week delivery cycles.
Pre-configured designs reduce project cycle times.
Options include NEMA 1 and NEMA 3R configurations, SACE Emax 2 main breakers (2,000A or 4,000A), and add-on feeder sections.
Safety and Convenience:
Improved finger-safe bus stack meets IP20 standards.
Bluetooth® technology for circuit breaker parameter setting and measurements via smartphone.
Single-tool simplicity for easy component installation or replacement.
Hinged gutter doors for quick access during wiring.
Purpose:
SPDs protect against transient surge conditions caused by events like lightning strikes or utility power anomalies.
Large single surge events (such as lightning) can reach hundreds of thousands of volts and cause immediate or intermittent equipment failure.
However, lightning and utility power anomalies account for only 20% of transient surges.
Types:
UL Market Offering:
High capacity service entrance SPDs
Medium capacity mid-level distribution SPDs
Light capacity panel board distribution SPDs
Point-of-use SPDs
IEC Market Offering:
SPD Class I (high discharge capacity)
SPD Class II (good protection level)
SPD Class III (dataline protection for data applications)
Working Principle:
When voltage is supplied to the primary coil, it creates a magnetic flux.
This changing magnetic flux induces an electromotive force (emf) in the secondary coil by the law of induction.
The induced emf in the secondary coil is lower than the emf in the primary coil.
Applications:
Electronics: Step-down transformers provide low voltage suitable for electronic devices (e.g., 5V).
Battery Chargers: Daily-use battery chargers also use step-down transformers.
Power Systems: They play a crucial role in power systems by lowering voltage levels for energy consumers
Function: A safety switch (also known as a residual current device or RCD) continuously monitors the electric current flowing through a circuit. It detects even minor imbalances and responds by disconnecting the power supply. This action helps prevent electrical shocks, fires, and injuries to occupants.
Types: Safety switches come in various types:
Accessories: Safety switch accessories include:
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