VMX
2
Series Digital Solid State Soft Starter User Manual
3 |
P a g e
1.1.3
Design Specifications
Type of Load:
Three - phase AC induction motors.
AC Supply Voltage:
Universal, 208 - 600VAC ±10%, 50/60 Hz.
Power Ratings:
9 - 1250 Amps, 7.5 - 1000 HP @ 460V.
Unit Capacity - Continuous
Max. Amp rating is UL Listed continuous rating.
Unit Capacity - Overload Rating
(Percent of motor FLA)
500% - 60 seconds.
Power Circuit
6 SCRs, full phase angle firing using a hard fire firing circuit to avoid motor
transient problems.
SCR Firing Angle Detection
6 pulse Independent Locked Phase Tracking with Auto-synchronization,
prevents misfiring on unstable source frequency.
SCR PIV Ratings
(Peak Inverse Voltage)
1600V
Transient Protection
RC snubber dV/dt networks on each phase.
Cooling
Fan assisted convection.
Bypass Contactor
Standard on all units.
Bypass Contactor Rating
Shunt rated or can be sized for Line start rating.
Bypass Contactor Control
Integral control is included, but contactor can be externally controlled as well.
Ambient Condition Design
0° to 40°C (32° to 122°F)
5 - 95% relative humidity.
0 - 3300 ft. (1000m) above sea level without derating.
Control Power
120VAC (customer supplied), 240VAC optional.
Inputs
6 Dry (voltage free) contact inputs using 24VDC from an internal power supply.
Programmable Relay Outputs
3 relays, 2 each Form C (SPDT), 1 each Form A (SPST).
Can be programmed for 32 functions, with delays or flashing.
Output Relay Contact Rating
5 Amps, 240VAC max. (1200VA).
Programmable Analog Outputs
1 analog output 4-20mA
Can be programmed for 12 functions with scaling.
Dedicated Fault Output
AC Triac solid state switch.
240VAC, 50mA max.
Approvals
UL Listed, Canadian UL (cUL) Listed CE Approved. UL 60947-4-2
