EM TEST VDS 200 Series User Manual

EM TEST VDS 200 Series
Manual for Operation V 5.19 34 / 57
4.5.2.
Function
The overvoltage protection consists of two parts:
Crowbar switch with the hardware.
A TVS diode will limit the max. overvoltage in the first µs till the security power switch will disconnect the DUT
from the dc source. A crowbar switch will discharge the energy storage capacitor bank via a 1.2Ω resistor to zero.
Controller
An analogue controller controls the overvoltage protection independent.
Blockdiagram
General overview of the overvoltage protection
4.5.3.
Protection levels
The overvoltage protection is manually selectable to the following protection levels
Level
Switch off level ± 5%
Max. overvoltage
Max. time [us] > level
Remark
60V
63V
95V
75us
Factory setting
40V
42V
75V
25us
30V
31.5V
68V
25us
20V
21V
55V
25us
The factory setting is 60V if the user did not order another protection level.

EM TEST VDS 200 Series Specifications

General

Brand	EM TEST
Model	VDS 200 Series
Category	Amplifier
Language	English