Troubleshooting guide

SECTION 2

DESCRIPTION

2.1 Introduction

The ESP-400 Plasma Power Source is designed for high speed plasma cutting applications. It is normally used with

equipment such as the ESAB Smart Plasma System (ESP). For cutting currents beyond the rating of the ESP-400,

parallel operation of these units is permissible. It is also possible to operate in parallel (see ref on figure 5-2) with the

ULTRA-LIFE 300 or ESP-600 cutting Power Source. For additional operating data and electrical characteristics of this

machine, refer below to Table 2-1, ESP-400 Specifications.

TABLE 2-1. ESP-400 SPECIFICATIONS

2.2 Description

The ESP-400 Plasma Power Source is a silicon controlled rectifier (SCR), three-phase transformer/rectifier type dc unit

with solid state circuitry. The unit can be operated from 100 to 500 amperes at duty cycles shown in Table 2-1, above.

A current control Panel-Remote Switch determines the location from which the output current will be regulated: either

locally from the Power Source front panel (Panel position) or remotely ("Remote" position) from a precision 0-10 volt

reference (V ref) signal.

The Power Source circuitry receiving the V ref signal is electrically (galvanically) isolated. This means that the common

for this signal may be tied to any voltage less than 150 V ac or dc with respect to earth ground.

*The 50% duty cycle is based on a 1-hour period; for example, 30 minutes "on" and 30 minutes "off" with fan running.

Rated

Output

100% Duty 400 A @ 200 V dc

50% Duty* 500 A @ 200 V dc

Output Current Range 100 to 500 Amperes

Open Circuit Voltage 417 V dc

Input Voltage 460 V ac, 60 Hz, 3-phase

380 V ac, 50 Hz, 3-phase

415 V ac, 50 Hz, 3-phase

Input Current

Rated Output

400 A Output 156 A @ 460 V ac, 60 Hz

173 A @ 415 V ac, 50 Hz

189 A @ 380 V ac, 50 Hz

500 A Output 195 A @ 460 V ac, 60 Hz

216 A @ 415 V ac, 50 Hz

237 A @ 380 V ac, 50 Hz

Power Factor @ Rated Load Approx. 75%

Dimensions Width

Depth

Height

36.75 in. (933.5 mm)

43.50 in. (1105 mm)

31.00 in. (787.4 mm)

Weight 1830 lbs (830 kg)