Nanjing Nanrui Jibao RCS9611CS Microcomputer Integrated Protection

Nanjing Nanrui Jibao RCS9611CS Microcomputer Integrated Protection

2.2 Zero sequence protection (grounding protection)

When the device is used in an ungrounded or low current grounded system and the zero sequence current during a ground fault is very small, grounding can be used

The trial jump function is used to isolate faults. This situation requires the zero sequence current to be introduced by an external dedicated zero sequence CT, which is not sufficient

Software self-produced.

When the device is used in a low resistance grounding system and the grounding zero sequence current is relatively large, the direct tripping method can be used to isolate it

Get rid of the malfunction. Correspondingly, this device provides three-stage zero sequence overcurrent protection, with zero sequence section I and zero sequence section II fixed as fixed

Time limit protection, the zero sequence III segment can be selected through control words to determine whether it is a timed or inverse time limit. The selection of inverse time limit characteristics is the same as the above

Flow segment III.

The zero sequence section III can be selected by the control word to trip or alarm.

When the zero sequence current trips and alarms, it can be introduced either by an external dedicated zero sequence CT or by software

Self production (there is a "zero sequence current self production" control word in the system setting).

2.3 Overload protection

The device is equipped with an independent overload protection, which can be selected by the control word to alarm or trip. pass

After the load outlet trips, it locks and closes again.

2.4 Acceleration protection

The device is equipped with an overcurrent acceleration protection and a zero sequence acceleration protection.

The reclosing acceleration can be selected as either pre reclosing acceleration or post reclosing acceleration. If you choose to accelerate before, the reclosing will be activated

Prior investment; If acceleration is selected, it will be activated for 3 seconds after the reclosing action.

Hand on acceleration is fixed for 3 seconds during hand on.

2.5 Low cycle protection

The device is equipped with a low cycle protection through low voltage lockout and frequency slip lockout. Through the control word (DF/DT lockout)

You can choose whether to lock the low cycle protection when the frequency drops beyond the slip lock value. Low voltage lockout function fixed

Fixed investment.

The device provides a "low cycle load reduction" hard pressing plate to activate and deactivate low cycle protection.

After the low cycle protection action, the lock is closed again.

2.6 Reclosing the switch

The device provides three-phase primary reclosing function, and its starting mode includes corresponding starting and tripping. The protection action of outlet 1 is activated

Move two types.

The reclosing method includes three types: no detection, no voltage detection of the line, and synchronous detection.

The recloser is activated after charging is completed. When the line is in normal state (KKJ=1, TWJ=0) and there is no locking signal, it runs for 15 minutes

Charge in seconds. The following signals are locked and reclosed:

1> Hand jumping or remote jumping; 2> Lock the reclosing switch in; 3> Control circuit disconnection; 4> Low cycle protection action; 5> Over negative

Load tripping; 6> The spring has not stored energy and is open; 7> Line PT disconnection (when there is no voltage on the line or when the line is put into operation at the same time); 8> High

Zhou protective action.

Nanjing Nanrui Jibao RCS9611CS Microcomputer Integrated Protection

2.7 Busbar Low Voltage Protection

The device provides a section of low voltage protection. When the bus line voltage is lower than the low voltage setting value, the set time low voltage protection is activated

Action. Low voltage protection can choose whether to use current blocking. If current blocking is enabled, only when the current is less than the blocking value,

Low voltage protection is only allowed to operate. When the three-phase PT is disconnected, the device can automatically identify and lock the low-voltage protection. The device provides' investment '

Low voltage protection "hard pressing plate is used to achieve the switching on and off of this function.

2.8 Bus Overvoltage Protection

The device provides a section of overvoltage protection. When the bus line voltage is higher than the bus overvoltage setting value, the bus passes through the set time

Pressure protection action. The device provides a "overvoltage protection" hard pressing plate to achieve the switching of this function.

2.9 Zero sequence overvoltage protection

The device provides a zero sequence overvoltage protection, and the zero sequence voltage is generated by the three-phase voltage itself. When the zero sequence voltage of the busbar is higher than

When the zero sequence overvoltage is set, the set time zero sequence overvoltage protection is activated. The device provides a hard pressure plate for "zero sequence overvoltage" input

Implement the switching of this function.

2.10 High cycle protection

The device provides a high cycle protection, and when the system frequency is higher than the high cycle set value, the set time high cycle protection will be activated.

The device provides a "high cycle protection" hard pressing plate to achieve the switching of this function.

2.11 Overcurrent lockout

The protective device is equipped with a high current lockout protection function, which is used for circuit breakers with insufficient breaking capacity or on-site FC protection

The situation of the circuit. When the fault current is greater than the current lockout protection setting, only the action message protection tripping outlet 1 does not operate,

Other outlets do not have overcurrent blocking function, which can be activated or deactivated through the "overcurrent blocking protection input" control word.

2.12 Trip Logic Matrix

The tripping mode of each protection in this device adopts a setting method, that is, which protection action and which switch can be tripped freely as needed

Set. RCS-9611CS standard configuration provides 2 sets of trip exits: trip exit 1 (CK1 "402-414"), trip exit

Mouth 2 (CK2 "427-428"), at this time, the set values "trip outlet 3" and "trip outlet 4" are invalid. When selecting BO

Provide 4 sets of trip outlets when inserting: trip outlet 1 (CK1 "509-510"), trip outlet 2 (CK2 "525-526")

Trip outlet 3 (CK3 "527-528"), trip outlet 4 (CK4 "529-530").