Atec EMI-EMPH User Manual

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, 500­750 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