2. Measuring of parameters of maximal voltage protection actuation (зНмах)

Decrease Ua until СД4 will be deactivated. Set on ЖКИ of MP3C-05 in the menu MEASURING value - voltage of protection return to initial state U_B. Calculate coefficient of return according to voltage value:

Smoothly increase voltage Ua, at the console panel, from minimal value to Umakc actuation (check of actuation Umakc is performed by means of СД4 light diode activation in the MP3C-05 device). Set on ЖКИ of MP3C-05 in the menu MEASURING value of voltage protection actuation U_Cp. Calculate accuracy of voltage protection actuation by means of formula:

Analogical measurement must be made for voltage phase В & С. Measuring data and calculation write to 'Fable 3.

Table 3

№ n/ П	Protect i о n type	Voltage phase	Uy (В)	иСР (В)	ив (В)	Кт,	4м %
1.	UMax	А	30
2.	UMax	А	60
3.	имах	А	100
4.	UMax	В	30
5.	UMax	В	60
6.	UMax	В	100
7.	имах	С	30
8.	имах	С	60
9.	имах	С	100

CompareK_HU , S_u with permissible values from table 1.

5. Checking of minimal voltage protection (3Hmin)

1. Setting of protection parameters of minimal voltage (3Hmin)

Enter the programming modules ЗН, НАСТРОЙКА, free used INPUTS, OUTPUTS of КОМ,INDICATION from previously given functions and set:

• SETTINGS:

• MIN VOLTAGE - 30 V;

• RESTRANTS:

• RESTRANT OF U_min - 0,1 s;

• CONTROL:

• PROTECTION U_min- TURN ON;

• OUTPUTS OF КОМ :

• P06 - СРАБ U _min- TURN ON;

• INDICATION:

• СДИ5 - СРАБ U _min - TURN ON;

Select in the programming module SETTING sring УВВ and press button ENTER.

Select string INDICATION, press button ENTER and set:

• СДИ5-NORMAL;