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Page last updated: Tuesday, April 01, 2008

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EMHP - 20kW to 90kW, up to 3000A

The EMHP series of power supplies is the highest power line of DC regulated high power units available in the range of 20-90 kW. Based on a regulated SCR phase control topology the EMHP series is ideally suited to applications where raw bulk power is required in a robust reliable package. 

All models are fully programmable sources of constant voltage and or constant current with automatic crossover and fully metered.

In an SCR phase-controlled DC Power Supply, output is controlled by modulating the conduction angle of the controlling SCRs.
 The EMHP Series, input ac is applied to pairs of bi-directionally connected SCRs placed within the primary circuit of this transformer is rectified and L/C filtered to provide a low ripple DC output. Both output voltage and current are sensed and compared against internal references or externally applied control levels so the supply provides either constant voltage or constant current regulation with automatic crossover depending on control level. Additional circuitry provides bias levels, circuit protection and metering functions.

Specification
AC Input
440/480 VAC, three phase 60 Hz - optional inputs available
Softstart AC inrush

Output Characteristics  
Regulation: 0.1%
Stability: 0.05%
Operating temperature: 0-50 deg C, derate above 50 deg C

 Protection Features
Overvoltage 
Overtemperature
OverCurrent 		Programming
Front panel controls and remote analog resistance, voltage and current programming (standard);
0-5V and 0-10V optional)
RS232 and IEEE-488 (optional)

 Options
Overvoltage protection
Casters or I beam base
Analog or digital meters
Digital programming interface

Mechanical
Size 1: 30" H x 22 1/4" W x 27 3/4" D, 500-750 lbs. (227-341 kg)
Size 2: 34 5/8" H x 27 1/2" W x 29 1/4" D, 750-900 lbs. (341-409 kg)
Size 3: 44 1/2" H x 27 1/2" W x 33 1/4" D, 1000-1500 lbs. (454-682 kg)
Size 3.5: 44 1/2" H x 27 1/2" W x 39" D, 1500 lbs. (682 kg)


Standard Model Listing
Model

Output
Voltage
(Volts)

Output
Current
(Amps)

Output Ripple
(mV) RMS

 Model Output
Voltage
(Volts)

Output
Current
(Amps)

Output Ripple
(mV) 
RMS

Size 1 (20 kW Maximum)

Size 3 (60 kW Maximum)

EMHP 10-1000
EMHP 20-750
EMHP 30-600
EMHP 40-450
EMHP 40-500
EMHP 60-300
EMHP 60-330
EMHP 80-250
EMHP 150-130
EMHP 300-60
EMHP 600-30		 0-10
0-20
0-30
0-40
0-40
0-60
0-60
0-80
0-150
0-300
0-600		 0-1000
0-750
0-600
0-450
0-500
0-300
0-330
0-250
0-130
0-60
0-30		 50
60
70
80
80
100
100
120
180
300
400

EMHP 10-3000
EMHP 20-1500
EMHP 20-2500
EMHP 30-1250
EMHP 30-1800
EMHP 40-1000
EMHP 40-1500
EMHP 60-750
EMHP 60-1000
EMHP 80-600
EMHP 80-750
EMHP 150-350
EMHP 150-400
EMHP 300-200
EMHP 600-100

0-10
0-20
0-20
0-30
0-30
0-40
0-40
0-60
0-60
0-80
0-80
0-150
0-150
0-300
0-600

0-3000
0-1500
0-2500
0-1250
0-1800
0-1000
0-1500
0-750
0-1000
0-600
0-750
0-350
0-400
0-200
0-100

50
60
60
70
70
80
80
100
100
120
120
180
180
300
400

Size 2 (30 kW Maximum)

Size 31/2 (90 kW Maximum)

EMHP 10-1500
EMHP 20-1000
EMHP 20-1250
EMHP 30-800
EMHP 30-950
EMHP 40-600
EMHP 40-750
EMHP 60-500
EMHP 80-375
EMHP 150-200
EMHP 300-100
EMHP 600-50

0-10
0-20
0-20
0-30
0-30
0-40
0-40
0-60
0-80
0-150
0-300
0-600

0-1500
0-1000
0-1250
0-800
0-950
0-600
0-750
0-500
0-375
0-200
0-100
0-50

50
60
60
70
70
80
80
100
120
180
300
400

EMHP 30-3000
EMHP 60-1500
EMHP 80-1125
EMHP 150-600
EMHP 300-300

0-30
0-60
0-80
0-150
0-300

0-3000
0-1500
0-1125
0-600
0-300

70
100
120
180
300

Ordering Information

EMHP 300 - 300 - D - x - x -

xxxx
Model Voltage   Current   Meter Type   AC Input Options Special Programming

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