Staco Variable Transformers Voltage Doublers

Staco Variable Transformers

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Staco Variable Transformers

(Click on P/N for more detailed specifications)

Three Phase Wye Phase Voltage Doublers 240V Input 0-560V Outputs

Manually Operated P/N	Motor Driven P/N	Input Volts	Phase	Hertz	Output Volts	Current Rating to 300V	Current Rating at 430V	Current Rating at 560V	Features
1020B-3	M1020B-3	240	3 PH	60	0-560	3.5A	2.0A	1.5A	3-Ganged Unit, Add 'CT' Suffix for Cased version
1520-3	M1520-3	240	3 PH	60	0-560	9.5A	5.4A	4.1A	3-Ganged Unit, Add 'CT' Suffix for Cased version
2520-3	M2520-3	240	3 PH	60	0-560	10A	5.7A	4.4A	3-Ganged Unit, Add 'CT' Suffix for Cased version
5021-3	M5021-3	240	3 PH	60	0-560	28A	16A	12.3A	3-Ganged Unit, Add 'E' Suffix for Cased version
6020-3	M6020-3	240	3 PH	60	0-560	35A	20A	15.4A	3-Ganged Unit, Add 'E' Suffix for Cased version
5021-6Y	M5021-6Y	240	3 PH	60	0-560	56A	32A	24.6A	6-Ganged Unit; Add 'E' Suffix for Enclosed version
6020-6Y	M6020-6Y	240	3 PH	60	0-560	70A	40A	30.8A	6-Ganged Unit, Add 'E' Suffix for Cased version
5021-9Y	M5021-9Y	240	3 PH	60	0-560	84A	48A	37A	9-Ganged Unit; Add 'E' Suffix for Enclosed version
6020-9Y	M6020-9Y	240	3 PH	60	0-560	105A	60A	46A	9-Ganged Unit, Add 'E' Suffix for Cased version
	M5021-12Y	240	3 PH	60	0-560	112A	64A	49A	12-Ganged Unit; Add 'E' Suffix for Enclosed version
	M6020-12Y	240	3 PH	60	0-560	140A	80A	62A	12-Ganged Unit, Add 'E' Suffix for Cased version
	M5021-15Y	240	3 PH	60	0-560	168A	96A	74A	15-Ganged Unit; Add 'E' Suffix for Enclosed version
	M6020-15Y	240	3 PH	60	0-560	175A	100A	77A	15-Ganged Unit, Add 'E' Suffix for Cased version
	M5021-21Y	240	3 PH	60	0-560	196A	112A	86A	21-Ganged Unit; Add 'E' Suffix for Enclosed version
	M6020-18Y	240	3 PH	60	0-560	210A	120A	92A	18-Ganged Unit, Add 'E' Suffix for Cased version
	M5021-24Y	240	3 PH	60	0-560	224A	128A	99A	24-Ganged Unit; Add 'E' Suffix for Enclosed version
	M6020-21Y	240	3 PH	60	0-560	245A	140A	108A	21-Ganged Unit, Add 'E' Suffix for Cased version
	M5021-27Y	240	3 PH	60	0-560	252A	144A	111A	27-Ganged Unit; Add 'E' Suffix for Enclosed version
	M6020-24Y	240	3 PH	60	0-560	280A	160A	123A	24-Ganged Unit, Add 'E' Suffix for Cased version
	M6020-27Y	240	3 PH	60	0-560	315A	180A	139A	27-Ganged Unit; Add 'E' Suffix for Enclosed version

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Important Notes:

CURRENT RATING TERMINOLOGY: To permit maximum utilization of STACO Variable Transformers, output ratings are given for both constant current and constant impedance loads. All current ratings are based on continuous use at ambient temperatures to 122 F (50 C). Use derating curve for higher ambients. Short duration overloads to 10 times transformer rating are possible. See graph for acceptable limits.

CONSTANT CURRENT RATING: Output current that can be carried regardless of output voltage setting. (Reduce, for output above 125% of input voltage, on voltage doubler connection. See Graph)

CONSTANT IMPEDANCE RATING: Output current that can be carried with loads such as incandescent lamps or resistance heaters in which the current drawn is approximately proportional to the applied voltage, increasing to maximum current at line voltage. This rating applies only to applications where maximum output voltage is limited to line voltage.

THREE PHASE CONNECTED TRANSFORMERS: If ganged units are used in a system that ordinarily has a common neutral or ground between source and load, the neutral or ground must be connected to the common terminals of the variable transformer assembly. If the system has no neutral, the load must be balanced or the transformers will be damaged.

OPERATION AT HIGHER FREQUENCIES: All Staco variable transformers are designed for operation at 60 or 50/60 Hz. Most models can also properly operate with input frequencies to 2000 Hz. Some models output ratings must be derated at higher frequencies. See derating table for details.

Variac Drawings

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