Digital Energy Saver

Digital Energy Saver

Power range up to 150 kW at 400 V
Compact and Efficient Design and startup
Choice of startup functions: breakaway pulse, voltage ramp, voltage or current limiting
Adjustable Torque i.e. Pedestal voltage
Adjustable Ramp up start time.
System Run, fault, Power On, Start/Ramp Up, Bypass LED on front Panel.

Electrical Specification:

Supply Voltage	Frequency	Pedestal Voltage
240-460 V	47/63 Hz	20%, 30%, 50%, 70% of I/P Voltage

Environmental Specification:

Operating Temp.	0^oC to 40 ^o C
Storage Temp.	-10 ^oC to 40 ^o C
Cooling	Cooling with heatsink.
Relative humidity	< 95 % no condensation allowed
Altitude	Maximum 1000 m reduce kW Rating by 1 % per additional 100 M

Control Specification:

Ramp Up Time	0.5 Sec To 120 Sec
Ramp Down Time	0.5 Sec To 120 Sec
Starting Duty	2.5 X unit rating in amperes for 60 Sec
	3 X unit rating in amperes for 30 Sec
	4 X unit rating in amperes for 10 Sec
	4.5 X unit rating in amperes for 5 Sec
Starts Per Hour	12 evenly spaced starts per hour at the Starting Duty
Starting Torque	9-49% of the DOL starting torque
Current Limit	30% DOL current for 60 Sec
	40% DOL current for 30 Sec
	50% DOL current for 10 Sec
	70% DOL current for 5 Sec
Semiconductor Fuses	Standard on units > 132 amp
Fault Detection	Shut down for loss of phase and short-circuit of Thyristors, indication on LED
Cooling	Naturally cooled < 39 amps, force cooled > 53 amps
Relays	Run, fault/ top of ramp
Relay Contact Rating	1.2 KVA, 250 C AX Max
LED indication	System Run, fault, Power On, Start/Ramp Up, Bypass
Control Circuitry	High frequency Microcontroller for controller

Block Diagram