Toshiba GR200 Series Instruction Manual page 194

Centralized busbar protection ied

Hide thumbs Also See for GR200 Series:

Table of Contents

Miscellaneous

Contact supervision (Contact SV)

The contact supervision function is designed for monitor the auxiliary contacts of circuit

breakers (CBs) and disconnectors (DSs). The function can allow the supervision function,

which is discussed in

contacts are not well-positioned.

CB and DS contact supervision

Table 2.8-1 shows the relationship between the main-contact and the auxiliary-contact in the

CB and the DS. When the main-contact is 'Open', the N/O and N/C contacts of the auxiliary-

contact are at 'Open' and 'Closed', respectively. However, if the both N/O and the N/C are

positioned at 'Open', the auxiliary contact is incorrect. Likewise, if the both are at 'Closed', the

auxiliary contact is incorrect. The function can supervise an incorrect condition of the

auxiliary-contact.

Table 2.8-1 Positions and conditions in Main/Auxiliary contacts in CB and DS

Main-contact position

CB contact supervision

Figure 2.8-1 illustrates the conditions of the auxiliary-contacts are obtained through the

replica function. Figure 2.8-2 shows that a 'CB_FAIL' signal is integrated; it is transferred to

Automatic supervision function.

The user should set On for the scheme switch [CB-SV] when the contact supervision is

required. Enter a timer for the setting [TCBSV]; the timer should be set between 0 to 100

Chapter Automatic supervision

Auxiliary-contact position

, to issue an alarm if the auxiliary

Condition of auxiliary contacts

Centralized GRB200

6F2S1931 (0.20)

(Soft: 030, 031, 032, 033, 034)

Show Quick Links

Chapters

Table of Contents