TEAMMaster™ — medium-voltage thyristor soft starters, 300–6000 hp, 2.3–6.9 kV

Description

TEAMMaster™ is a line of thyristor (solid-state) soft starters for medium-voltage induction motors from 300 to 6000 hp at voltages from 2300 to 6900 V. They protect machinery from shock loads during starting and stopping (slippage and breakage of belts, decoupling of couplings, gearbox failures), providing smooth stepless acceleration and controlled braking with closed-loop current control. The starting current is limited, which protects the electrical network from voltage dips and tripping during direct-on-line starting; this is especially important at sites with a weak network. The unit is a microprocessor-based reduced-voltage starter in a freestanding NEMA 12 or NEMA 3R enclosure with two isolated compartments: a medium-voltage power compartment and a low-voltage control logic compartment behind the door. Each starter includes a load-break disconnect, class R fuses, an incoming vacuum contactor, solid-state power poles based on thyristors and a vacuum bypass contactor that closes after the motor reaches rated speed. The starter provides soft starting in normal mode and emergency direct-on-line starting at full voltage with full electronic motor protection, by simple switching: a redundant scheme for critical applications. Technical data: class E-2 per UL 347, CE marking and CSA approval; basic impulse insulation level 45 kV; short-circuit rating 200 MVA at 2300 V and 350 MVA at 4160 V; overload 500 % for 30 s; thyristor reverse voltage 8000 V (2.1 kV) and 12,000 V (4.2 kV); fiber-optic control circuits; Modbus/RS485 communication; 5 kV, 400 A disconnect with load break and 600 A continuous, with inspection window, grounding and lockable handle; fixed vacuum contactors for isolating and bypassing the thyristors. A separate electronic overload relay SPE provides an adjustable class 10–30 and protection against phase unbalance, loss of phase and phase reversal. Self-test functions for quick commissioning are built in, with a 120 V, 1000 VA control circuit transformer. Applications: pumps, fans, compressors, conveyors and crushers in the oil and gas, water supply, mining and cement industries.

Technical specifications