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140DAO84210 SCHNEIDER

Brand: Schneider

Model number:140DAO84210 

Colour:new                  

Warranty: 12 months

Lead Time:3-day working day   

Country of origin: USA Price: Please contact us         

Product weight:0.40kg

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

140DAO84210   SCHNEIDER

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Products Name: 140DAO84210 SCHNEIDER

PRODUCT DESCRIPTION

When setting the relay characteristic/torque angle for the three phase directional overcurrent element, a positive angle setting was specified. This was due to the fact that we consider as polarising voltage, the phase voltage value in quadrature of the current under fault conditions. With directional earth fault protection, the residual current under fault conditions lies at an angle lagging the polarising residual earth fault voltage.

Description:

Autoreclose logic description 

The autoreclose function provides the ability to automatically control the autorecloser (two, 

three or four shot cycle, settable using “Phase Cycles” and “E/Gnd Cycles” menu). Dead 

times for all the shots (reclose attempts) can be independently adjusted. 

The number of shots is directly related to the type of faults likely to occur on the system and 

the voltage level of the system (for instance medium voltage networks). 

The Dead Time (tD1, tD2, tD3 and tD4) starts when the CB has tripped (when the 52a input 

has disappeared). Dead Time is adjusted to start autoreclose when circuit breaker is closed. 

NOTE: If an electromagnetic relay is used (working on the principle of disc in 

the electromagnetic field due to eddy current generated in the disc), 

an additional dead time, depending of the tripping cause, is settable, 

At the end of the relevant dead time, “CB FLT” input is sent (see § 5.2.2.1). 

The reclaim time (tR) starts when the CB has closed. If the circuit breaker does not trip 

again, the autoreclose function resets at the end of the reclaim time. 

If the protection operates during the reclaim time, the relay either advances to the next shot 

that is programmed in the autoreclose cycle, or it locks out (see § 5.2.6). 

The total number of reclosures is displayed under the “MEASUREMENTS/Reclose Stats” 

menu. 

5.2.5 Autoreclose Inhibit Following Manual Close 

The “Inhib Time tI” timer can be used to block the autoreclose being initiated after the CB is 

manually closed onto a fault. The Autoreclose is blocked during the “Inhib Time tI“ following 

manual CB Closure. 

5.2.6 Recloser lockout 

If the protection element operates during the reclaim time, following the final reclose attempt, 

the relay will lockout and the autoreclose function is disabled until the lockout condition 

resets. 

The lockout condition can reset by a manual closing after the "Inhib Time tI". 

The Autoreclose can also be locked out using a “CB FLT” input. This information can be 

issued from the "not charged" or "Low gas pressure" indications of CB springs. 

Note that Autoreclose can also be locked by: 

− The fact that the CB doesn’t open after tBf delay (CB Fail) 

− An operating time that is above programmed thresholds. 

5.2.7 Setting group change lockout 

The change of setting groups is only possible if there are no protection or automation 

functions running (except the thermal overload function). During the autorecloser cycle, if the 

relay receives an order to change setting groups, this order is kept in memory, and will only 

be executed after the timer has elapsed. 

5.2.8 Rolling demand 

This specific counter avoids a frequent operation of a CB in case of frequent intermittent 

fault. The numbers of shoot can be adjusted from 1 to 100 in the cell “Max cycles nb”, 

settable in a time period from 10min to 24 hours. 

The rolling demand is used when a definite number of successfully recloses are made on a 

definite time.


140DAO84010   SCHNEIDER

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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